/**
 * Kairo Ghost Theme - Main Stylesheet
 * Engineered for Decibels AI (https://getdecibels.ai)
 * Adheres strictly to the Kairo Design System tokens and aesthetics
 */

/* ==========================================================================
   1. CSS Variables & Design Tokens
   ========================================================================== */
:root {
    /* Brand & Accent Colors */
    --color-primary: #4648d4;
    --color-primary-container: #6063ee;
    --color-on-primary: #ffffff;
    --color-on-primary-container: #fffbff;
    --color-primary-fixed: #e1e0ff;
    --color-primary-fixed-dim: #c0c1ff;
    --color-on-primary-fixed: #07006c;
    --color-on-primary-fixed-variant: #2f2ebe;

    --color-secondary: #006b5f;
    --color-secondary-container: #6df5e1;
    --color-secondary-fixed: #71f8e4;
    --color-secondary-fixed-dim: #4fdbc8;
    --color-on-secondary: #ffffff;
    --color-on-secondary-container: #006f64;
    --color-on-secondary-fixed: #00201c;
    --color-on-secondary-fixed-variant: #005048;

    --color-tertiary: #825100;
    --color-tertiary-container: #a36700;
    --color-tertiary-fixed: #ffddb8;
    --color-tertiary-fixed-dim: #ffb95f;
    --color-on-tertiary: #ffffff;
    --color-on-tertiary-container: #fffbff;
    --color-on-tertiary-fixed: #2a1700;
    --color-on-tertiary-fixed-variant: #653e00;

    /* Surfaces & Neutrals (Light Mode Default) */
    --color-background: #f9f9fe;
    --color-surface: #f9f9fe;
    --color-surface-dim: #d9dade;
    --color-surface-bright: #f9f9fe;
    --color-surface-container-lowest: #ffffff;
    --color-surface-container-low: #f3f3f8;
    --color-surface-container: #ededf2;
    --color-surface-container-high: #e8e8ed;
    --color-surface-container-highest: #e2e2e7;

    --color-on-background: #1a1c1f;
    --color-on-surface: #1a1c1f;
    --color-on-surface-variant: #464554;
    --color-outline: #767586;
    --color-outline-variant: #c7c4d7;
    --color-outline-variant-light: rgba(199, 196, 215, 0.45);

    --color-error: #ba1a1a;
    --color-error-container: #ffdad6;
    --color-on-error: #ffffff;
    --color-on-error-container: #93000a;

    --color-inverse-surface: #2e3034;
    --color-inverse-on-surface: #f0f0f5;
    --color-inverse-primary: #c0c1ff;
    --color-surface-tint: #494bd6;

    /* Typography */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

    /* Radii */
    --radius-xs: 0.25rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --radius-3xl: 1.75rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(26, 28, 31, 0.05);
    --shadow-md: 0 4px 12px -2px rgba(26, 28, 31, 0.06), 0 2px 6px -1px rgba(26, 28, 31, 0.04);
    --shadow-lg: 0 12px 24px -4px rgba(26, 28, 31, 0.08), 0 4px 8px -2px rgba(26, 28, 31, 0.03);
    --shadow-xl: 0 20px 32px -6px rgba(26, 28, 31, 0.1), 0 8px 16px -4px rgba(26, 28, 31, 0.04);
    --shadow-card: 0 10px 30px -10px rgba(70, 72, 212, 0.08), 0 0 1px 1px rgba(199, 196, 215, 0.4);
    --shadow-primary: 0 8px 20px -4px rgba(70, 72, 212, 0.35);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #4648d4 0%, #6063ee 50%, #006b5f 100%);
    --gradient-accent: linear-gradient(135deg, #4648d4 0%, #a36700 100%);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(199, 196, 215, 0.5);

    /* Max Widths */
    --container-max: 80rem; /* 1280px, matching Tailwind max-w-7xl */
    --container-narrow: 840px;
    --header-height: 80px;
}

/* ==========================================================================
   2. Dark Mode Overrides
   ========================================================================== */
html.dark {
    --color-background: #0f1013;
    --color-surface: #0f1013;
    --color-surface-dim: #15171b;
    --color-surface-bright: #1f2228;
    --color-surface-container-lowest: #14161a;
    --color-surface-container-low: #1a1c22;
    --color-surface-container: #21242b;
    --color-surface-container-high: #292d36;
    --color-surface-container-highest: #323742;

    --color-on-background: #f0f0f5;
    --color-on-surface: #f0f0f5;
    --color-on-surface-variant: #9d9cb0;
    --color-outline: #767586;
    --color-outline-variant: #3a3b48;
    --color-outline-variant-light: rgba(58, 59, 72, 0.6);

    --glass-bg: rgba(20, 22, 26, 0.85);
    --glass-border: rgba(58, 59, 72, 0.6);
    --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(58, 59, 72, 0.6);
}

/* ==========================================================================
   3. Base & Reset
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

@media (max-width: 1440px), (max-height: 800px) {
    html {
        font-size: 15px;
    }
}

body.kairo-body {
    font-family: var(--font-sans);
    background-color: var(--color-background);
    color: var(--color-on-surface);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body.kairo-menu-open {
    overflow: hidden;
}

::selection {
    background-color: var(--color-primary-fixed);
    color: var(--color-on-primary-fixed);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button, input {
    font-family: inherit;
    border: none;
    background: none;
}

button {
    cursor: pointer;
}

/* Icons */
.kairo-icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
    flex-shrink: 0;
    display: inline-block;
}

.material-symbols-outlined {
    font-family: 'Material Symbols Outlined';
    font-weight: normal;
    font-style: normal;
    font-size: 24px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* Layout Containers */
.kairo-site-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.kairo-container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

@media (min-width: 640px) {
    .kairo-container {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

@media (min-width: 1024px) {
    .kairo-container {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

.kairo-container-narrow {
    max-width: var(--container-narrow);
}

.kairo-main {
    flex: 1 0 auto;
}

/* ==========================================================================
   4. Reading Progress Bar
   ========================================================================== */
.kairo-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 100;
    transition: width 0.1s linear;
}

/* ==========================================================================
   5. Sticky Header & Navigation
   ========================================================================== */
.kairo-header {
    position: sticky;
    top: 0;
    z-index: 50;
    width: 100%;
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.kairo-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    gap: 1.5rem;
}

.kairo-header-brand {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.kairo-brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.kairo-brand-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 1rem;
    object-fit: cover;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    outline: 1px solid rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.kairo-brand-link:hover .kairo-brand-icon {
    transform: scale(1.05);
}

.kairo-brand-text {
    font-size: 1.25rem;
    font-weight: 800;
    font-family: var(--font-headline, 'Plus Jakarta Sans', sans-serif);
    letter-spacing: -0.025em;
    color: var(--color-on-surface);
    transition: color 0.2s ease;
}

@media (min-width: 640px) {
    .kairo-brand-text {
        font-size: 1.5rem;
    }
}

.kairo-brand-link:hover .kairo-brand-text {
    color: var(--color-primary);
}

/* Right-aligned Navigation & CTAs wrapper */
.kairo-header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.kairo-header-divider {
    height: 1rem;
    width: 1px;
    background-color: var(--color-outline-variant-light);
}

.kairo-nav-login {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-on-surface);
    padding: 0.5rem 0.75rem;
    transition: color 0.2s ease;
    text-decoration: none;
    border-radius: var(--radius-md);
}

.kairo-nav-login:hover {
    color: var(--color-primary);
}

.kairo-header-mobile-controls {
    display: none;
    align-items: center;
    gap: 0.5rem;
}

/* Main Nav */
.kairo-header-nav {
    display: flex;
    align-items: center;
}

.kairo-nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
}

.kairo-nav-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-on-surface-variant);
    padding: 0.5rem 0.25rem;
    position: relative;
    text-decoration: none;
    transition: color 0.15s ease;
}

.kairo-nav-link:hover,
.nav-current .kairo-nav-link {
    color: var(--color-primary);
}

.nav-current .kairo-nav-link {
    font-weight: 700;
}

/* Header Actions */
.kairo-header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.kairo-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    color: var(--color-on-surface-variant);
    background-color: transparent;
    transition: all 0.2s ease;
}

.kairo-icon-btn:hover {
    color: var(--color-on-surface);
    background-color: var(--color-surface-container-high);
}

/* Theme Toggle */
.kairo-theme-toggle .kairo-icon-sun {
    display: none;
}
.kairo-theme-toggle .kairo-icon-moon {
    display: block;
}

html.dark .kairo-theme-toggle .kairo-icon-sun {
    display: block;
}
html.dark .kairo-theme-toggle .kairo-icon-moon {
    display: none;
}

/* Mobile Toggle */
.kairo-mobile-menu-btn {
    display: none;
}
.kairo-mobile-menu-btn .kairo-icon-menu-close {
    display: none;
}
body.kairo-menu-open .kairo-mobile-menu-btn .kairo-icon-menu-open {
    display: none;
}
body.kairo-menu-open .kairo-mobile-menu-btn .kairo-icon-menu-close {
    display: block;
}

/* Mobile Drawer */
.kairo-mobile-drawer {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--color-surface-container-lowest);
    border-bottom: 1px solid var(--color-outline-variant);
    padding: 1.5rem 0 2rem;
    box-shadow: var(--shadow-xl);
    z-index: 49;
}

.kairo-mobile-drawer.is-open {
    display: block;
    animation: drawerSlideDown 0.2s ease-out;
}

@keyframes drawerSlideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.kairo-mobile-nav .kairo-nav-menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.kairo-mobile-nav .kairo-nav-link {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 1.05rem;
}

.kairo-mobile-nav .kairo-nav-link:hover {
    background-color: var(--color-surface-container-low);
    color: var(--color-primary);
}

.kairo-mobile-nav .nav-current .kairo-nav-link {
    color: var(--color-primary);
    background-color: rgba(70, 72, 212, 0.1);
    font-weight: 700;
}

.kairo-mobile-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-outline-variant-light);
}

/* Responsive Breakpoint for Nav */
@media (max-width: 840px) {
    .kairo-header-right {
        display: none;
    }
    .kairo-header-mobile-controls {
        display: flex;
    }
    .kairo-mobile-menu-btn {
        display: inline-flex;
    }
}

/* ==========================================================================
   6. Buttons & Badges (Kairo Style)
   ========================================================================== */
.kairo-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-lg);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
    text-decoration: none;
    cursor: pointer;
}

.kairo-btn:active {
    transform: scale(0.98);
}

.kairo-btn-primary {
    background-color: var(--color-primary);
    color: #ffffff !important;
    box-shadow: var(--shadow-primary);
}

.kairo-btn-primary:hover {
    background-color: var(--color-primary-container);
    box-shadow: 0 10px 25px -4px rgba(70, 72, 212, 0.45);
    color: #ffffff !important;
}

.kairo-btn-secondary {
    background-color: var(--color-surface-container-high);
    color: var(--color-on-surface) !important;
}

.kairo-btn-secondary:hover {
    background-color: var(--color-surface-container-highest);
}

.kairo-btn-ghost {
    background-color: transparent;
    color: var(--color-on-surface) !important;
}

.kairo-btn-ghost:hover {
    background-color: var(--color-surface-container-high);
    color: var(--color-primary) !important;
}

.kairo-btn-sm {
    font-size: 0.8125rem;
    padding: 0.45rem 0.95rem;
    border-radius: var(--radius-md);
}

.kairo-btn-full {
    width: 100%;
}

/* Badges */
.kairo-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
}

.kairo-badge-tag {
    background-color: rgba(70, 72, 212, 0.1);
    color: var(--color-primary);
    transition: all 0.15s ease;
}

.kairo-badge-tag:hover {
    background-color: var(--color-primary);
    color: #ffffff;
}

.kairo-badge-featured {
    background-color: var(--color-tertiary-fixed);
    color: var(--color-on-tertiary-fixed);
}

.kairo-badge-article {
    background-color: var(--color-surface-container-high);
    color: var(--color-on-surface-variant);
}

.kairo-badge-accent {
    background-color: rgba(0, 107, 95, 0.12);
    color: var(--color-secondary);
}

.kairo-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary);
}

/* Gradient Utilities matching templates/home/index.html */
.kairo-text-gradient,
.text-gradient-primary {
    background: linear-gradient(135deg, #4648d4 0%, #6063ee 50%, #006b5f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-gradient-accent {
    background: linear-gradient(135deg, #4648d4 0%, #a36700 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .kairo-text-gradient,
.dark .kairo-text-gradient,
[data-theme="dark"] .text-gradient-primary,
.dark .text-gradient-primary {
    background: linear-gradient(135deg, #8183f8 0%, #a5a7ff 50%, #20b2aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.kairo-meta-divider {
    color: var(--color-outline);
    font-size: 0.85em;
}

/* ==========================================================================
   7. Hero Section
   ========================================================================== */
.kairo-hero {
    position: relative;
    padding: 3.25rem 0 3.5rem;
    display: flex;
    align-items: center;
    overflow: hidden;
    background-color: var(--color-surface);
}

@media (min-width: 1024px) {
    .kairo-hero {
        padding: 4.25rem 0 4.5rem;
    }
}

.kairo-hero .kairo-container {
    width: 100%;
}

.kairo-hero-mesh {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 10% 20%, rgba(70, 72, 212, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 90% 30%, rgba(0, 107, 95, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 50% 80%, rgba(96, 99, 238, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.kairo-hero-grid-pattern {
    position: absolute;
    inset: 0;
    background-size: 32px 32px;
    background-image: linear-gradient(to right, rgba(118, 117, 134, 0.06) 1px, transparent 1px),
                      linear-gradient(to bottom, rgba(118, 117, 134, 0.06) 1px, transparent 1px);
    pointer-events: none;
    opacity: 0.6;
}

.kairo-hero-glow {
    position: absolute;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: min(700px, 90vw);
    height: 350px;
    background: rgba(70, 72, 212, 0.1);
    border-radius: 9999px;
    filter: blur(64px);
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] .kairo-hero-glow,
.dark .kairo-hero-glow {
    background: rgba(96, 99, 238, 0.16);
}

.kairo-hero-content {
    position: relative;
    z-index: 1;
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
}

.kairo-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.kairo-hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.035em;
    color: var(--color-on-surface);
    margin-bottom: 0.875rem;
}

@media (max-width: 768px) {
    .kairo-hero-title {
        font-size: 2.25rem;
        margin-bottom: 0.75rem;
    }
}

.kairo-hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--color-on-surface-variant);
    max-width: 680px;
    margin: 0 auto 1.25rem;
}

/* Hero Newsletter Subscription Field */
.kairo-hero-newsletter {
    margin: 1.5rem auto 0;
    width: 100%;
    max-width: 520px;
}

.kairo-hero-newsletter .kairo-newsletter-input-group {
    background-color: var(--color-surface-container-lowest);
    padding: 0.375rem 0.375rem 0.375rem 1.25rem;
    border-radius: 1rem;
    border: 1px solid var(--color-outline-variant);
    box-shadow: 0 4px 20px -2px rgba(70, 72, 212, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.kairo-hero-newsletter .kairo-newsletter-input-group:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(70, 72, 212, 0.18), 0 8px 24px -4px rgba(70, 72, 212, 0.12);
}

.kairo-hero-newsletter .kairo-input {
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0.75rem 0;
    font-size: 1rem;
    color: var(--color-on-surface);
}

.kairo-hero-newsletter .kairo-input::placeholder {
    color: var(--color-on-surface-variant);
    opacity: 0.75;
}

.kairo-hero-newsletter .kairo-btn {
    flex-shrink: 0;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 700;
}

@media (max-width: 540px) {
    .kairo-hero-newsletter .kairo-newsletter-input-group {
        flex-direction: column;
        padding: 0;
        background-color: transparent;
        border: none;
        box-shadow: none;
        gap: 0.75rem;
    }

    .kairo-hero-newsletter .kairo-input {
        background-color: var(--color-surface-container-lowest);
        border: 1px solid var(--color-outline-variant);
        border-radius: 0.75rem;
        padding: 0.85rem 1.25rem;
        width: 100%;
        box-shadow: var(--shadow-sm);
    }

    .kairo-hero-newsletter .kairo-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Hero Search Bar Component */
.kairo-hero-search {
    margin: 1.5rem auto 1.25rem;
    width: 100%;
    max-width: 520px;
    background: none;
    border: none;
    padding: 0;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
    display: block;
}

.kairo-hero-search-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 1rem 0.75rem 1.25rem;
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant);
    border-radius: 1rem;
    box-shadow: 0 4px 20px -2px rgba(70, 72, 212, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.kairo-hero-search:hover .kairo-hero-search-inner {
    border-color: var(--color-primary);
    box-shadow: 0 6px 24px -4px rgba(70, 72, 212, 0.14), 0 3px 8px rgba(0, 0, 0, 0.04);
    transform: translateY(-1px);
}

.kairo-hero-search:focus-visible {
    outline: none;
}

.kairo-hero-search:focus-visible .kairo-hero-search-inner {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(70, 72, 212, 0.2), 0 8px 24px -4px rgba(70, 72, 212, 0.12);
}

.kairo-hero-search-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
    flex: 1;
}

.kairo-hero-search-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}

.kairo-hero-search-icon .kairo-icon {
    width: 1.25rem;
    height: 1.25rem;
}

.kairo-hero-search-placeholder {
    font-size: 0.9375rem;
    color: var(--color-on-surface-variant);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kairo-hero-search-shortcut {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

.kairo-hero-search-shortcut kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.2rem 0.45rem;
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-on-surface-variant);
    background-color: var(--color-surface-container-high);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: 0.375rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

@media (max-width: 540px) {
    .kairo-hero-search-shortcut {
        display: none;
    }

    .kairo-hero-search-inner {
        padding: 0.625rem 0.875rem 0.625rem 1rem;
    }
}

/* Trending Tags Bar */
.kairo-hero-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.kairo-hero-tags-label {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-on-surface-variant);
}

.kairo-tag-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.kairo-tag-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-on-surface-variant);
    transition: all 0.15s ease;
}

.kairo-tag-pill:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.kairo-tag-count {
    font-size: 0.75rem;
    padding: 0.1rem 0.4rem;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-container-high);
    color: var(--color-on-surface-variant);
}

/* ==========================================================================
   8. Featured Post Section
   ========================================================================== */
.kairo-featured-section {
    padding: 3rem 0 2rem;
}

.kairo-featured-card {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-3xl);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.kairo-featured-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.kairo-featured-media {
    position: relative;
    min-height: 380px;
}

.kairo-featured-img-link {
    display: block;
    height: 100%;
}

.kairo-featured-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.kairo-featured-card:hover .kairo-featured-image {
    transform: scale(1.03);
}

.kairo-featured-body {
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.kairo-featured-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.025em;
    color: var(--color-on-surface);
    margin: 1rem 0 0.85rem;
}

.kairo-featured-title a:hover {
    color: var(--color-primary);
}

.kairo-featured-excerpt {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-on-surface-variant);
    margin-bottom: 2rem;
}

@media (max-width: 900px) {
    .kairo-featured-card {
        grid-template-columns: 1fr;
    }
    .kairo-featured-media {
        min-height: 240px;
    }
    .kairo-featured-body {
        padding: 2rem 1.5rem;
    }
    .kairo-featured-title {
        font-size: 1.5rem;
    }
}

/* ==========================================================================
   9. Post Feed & Grid
   ========================================================================== */
.kairo-feed-section {
    padding: 3.5rem 0 5rem;
}

.kairo-section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 2.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.kairo-section-title {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-on-surface);
}

.kairo-section-caption {
    font-size: 0.9375rem;
    color: var(--color-on-surface-variant);
}

.kairo-section-action {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-primary);
}

.kairo-section-action:hover {
    color: var(--color-primary-container);
    transform: translateX(2px);
}

.kairo-post-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

@media (max-width: 1024px) {
    .kairo-post-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .kairo-post-grid {
        grid-template-columns: 1fr;
    }
}

/* Post Card */
.kairo-card {
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.kairo-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: rgba(70, 72, 212, 0.3);
}

.kairo-card-image-link {
    display: block;
    position: relative;
    overflow: hidden;
}

.kairo-card-figure {
    position: relative;
    aspect-ratio: 16 / 9;
    background-color: var(--color-surface-container-low);
    overflow: hidden;
}

.kairo-card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.kairo-card:hover .kairo-card-image {
    transform: scale(1.04);
}

.kairo-card .kairo-badge-featured {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 2;
    box-shadow: var(--shadow-md);
}

.kairo-card-content {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    flex: 1 0 auto;
}

.kairo-card-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--color-on-surface-variant);
    margin-bottom: 0.85rem;
}

.kairo-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.015em;
    color: var(--color-on-surface);
    margin-bottom: 0.75rem;
}

.kairo-card-title-link:hover {
    color: var(--color-primary);
}

.kairo-card-excerpt {
    font-size: 0.9375rem;
    line-height: 1.55;
    color: var(--color-on-surface-variant);
    margin-bottom: 1.5rem;
    flex: 1 0 auto;
}

.kairo-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid var(--color-outline-variant-light);
    margin-top: auto;
}

.kairo-card-author {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.kairo-author-avatar-link {
    display: block;
}

.kairo-author-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 1px solid var(--color-outline-variant-light);
}

.kairo-author-avatar-placeholder {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-container-high);
    color: var(--color-primary);
    font-weight: 700;
    font-size: 0.8125rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kairo-author-name {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-on-surface);
}

.kairo-card-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-container-low);
    color: var(--color-on-surface-variant);
    transition: all 0.2s ease;
}

.kairo-card:hover .kairo-card-arrow {
    background-color: var(--color-primary);
    color: #ffffff;
    transform: translateX(3px);
}

/* Empty State */
.kairo-empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 5rem 2rem;
    background-color: var(--color-surface-container-lowest);
    border: 1px dashed var(--color-outline-variant);
    border-radius: var(--radius-2xl);
}

.kairo-empty-icon {
    font-size: 3rem;
    color: var(--color-outline);
    margin-bottom: 1rem;
}

.kairo-empty-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-on-surface);
    margin-bottom: 0.5rem;
}

.kairo-empty-text {
    font-size: 0.95rem;
    color: var(--color-on-surface-variant);
}

/* ==========================================================================
   10. Pagination
   ========================================================================== */
.kairo-pagination {
    margin-top: 3.5rem;
    display: flex;
    justify-content: center;
}

.kairo-pagination-container {
    display: inline-flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.5rem 1.25rem;
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
}

.kairo-pagination-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-on-surface);
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-full);
    transition: all 0.15s ease;
}

.kairo-pagination-btn:hover:not(.kairo-pagination-disabled) {
    background-color: var(--color-surface-container-high);
    color: var(--color-primary);
}

.kairo-pagination-disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.kairo-pagination-location {
    font-size: 0.875rem;
    color: var(--color-on-surface-variant);
}

.kairo-pagination-current {
    font-weight: 700;
    color: var(--color-primary);
}

/* ==========================================================================
   11. Single Post & Page Templates
   ========================================================================== */
.kairo-post {
    padding-bottom: 4rem;
}

.kairo-post-header,
.kairo-page-header {
    padding: 3.5rem 0 2.5rem;
    text-align: center;
}

.kairo-post-breadcrumbs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-on-surface-variant);
    margin-bottom: 1.25rem;
}

.kairo-breadcrumb-link:hover {
    color: var(--color-primary);
}

.kairo-breadcrumb-sep {
    color: var(--color-outline-variant);
}

.kairo-breadcrumb-current {
    color: var(--color-primary);
}

.kairo-post-tags-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.kairo-post-title,
.kairo-page-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--color-on-surface);
    margin-bottom: 1.25rem;
}

@media (max-width: 768px) {
    .kairo-post-title,
    .kairo-page-title {
        font-size: 2.15rem;
    }
}

.kairo-post-excerpt,
.kairo-page-excerpt {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--color-on-surface-variant);
    max-width: 720px;
    margin: 0 auto 2rem;
}

.kairo-post-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-outline-variant-light);
    flex-wrap: wrap;
    gap: 1.25rem;
}

.kairo-post-authors {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.kairo-post-author-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-align: left;
}

.kairo-author-name-link {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-on-surface);
}

.kairo-author-name-link:hover {
    color: var(--color-primary);
}

.kairo-post-timing {
    font-size: 0.8125rem;
    color: var(--color-on-surface-variant);
}

/* Share Toolbar */
.kairo-share-toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.kairo-share-label {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-on-surface-variant);
    margin-right: 0.25rem;
}

.kairo-share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-container-low);
    color: var(--color-on-surface-variant);
    transition: all 0.15s ease;
    position: relative;
}

.kairo-share-btn:hover {
    background-color: var(--color-primary);
    color: #ffffff;
    transform: translateY(-1px);
}

.kairo-copy-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-inverse-surface);
    color: var(--color-inverse-on-surface);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

.kairo-copy-tooltip.is-visible {
    opacity: 1;
}

/* Feature Image */
.kairo-post-feature-wrapper,
.kairo-page-feature-wrapper {
    margin-bottom: 3.5rem;
}

.kairo-post-figure,
.kairo-page-figure {
    max-width: var(--container-max);
    margin: 0 auto;
}

.kairo-post-feature-image,
.kairo-page-feature-image {
    width: 100%;
    max-height: 640px;
    object-fit: cover;
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-xl);
}

.kairo-post-caption,
.kairo-page-caption {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-on-surface-variant);
    margin-top: 0.75rem;
    font-style: italic;
}

/* ==========================================================================
   12. Rich Content Typography (gh-content & kairo-prose)
   ========================================================================== */
.gh-content,
.kairo-prose {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-on-surface);
}

.gh-content > * + * {
    margin-top: 1.75rem;
}

.gh-content h1,
.gh-content h2,
.gh-content h3,
.gh-content h4,
.gh-content h5,
.gh-content h6 {
    color: var(--color-on-surface);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-top: 2.75rem;
    margin-bottom: 1rem;
}

.gh-content h1 { font-size: 2.25rem; }
.gh-content h2 { font-size: 1.85rem; border-bottom: 1px solid var(--color-outline-variant-light); padding-bottom: 0.5rem; }
.gh-content h3 { font-size: 1.5rem; }
.gh-content h4 { font-size: 1.25rem; }

.gh-content p {
    margin-bottom: 1.5rem;
    color: var(--color-on-surface);
}

.gh-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-decoration-thickness: 1.5px;
    text-underline-offset: 3px;
    font-weight: 600;
}

.gh-content a:hover {
    color: var(--color-primary-container);
}

.gh-content strong {
    font-weight: 700;
    color: var(--color-on-surface);
}

.gh-content em {
    font-style: italic;
}

.gh-content ul,
.gh-content ol {
    margin: 1.5rem 0 1.5rem 1.75rem;
    padding-left: 0.5rem;
}

.gh-content li {
    margin-bottom: 0.5rem;
}

.gh-content hr {
    border: 0;
    height: 1px;
    background: var(--color-outline-variant-light);
    margin: 3.5rem 0;
}

/* Blockquotes */
.gh-content blockquote {
    position: relative;
    padding: 1.5rem 1.75rem;
    margin: 2.5rem 0;
    background-color: var(--color-surface-container-low);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
    font-size: 1.15rem;
    font-style: italic;
    color: var(--color-on-surface);
}

.gh-content blockquote p {
    margin-bottom: 0;
}

/* Code Blocks & Inline Code */
.gh-content code:not(pre code) {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background-color: var(--color-surface-container-high);
    color: var(--color-primary);
    padding: 0.2em 0.45em;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.gh-content pre {
    background-color: #16181d;
    color: #e6edf3;
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 2rem 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.gh-content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

/* Code Copy Button */
.kairo-code-copy-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background-color: rgba(255, 255, 255, 0.1);
    color: #f0f0f5;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.kairo-code-copy-btn:hover {
    background-color: rgba(255, 255, 255, 0.25);
}

.kairo-code-copy-btn .copied {
    display: none;
}

.kairo-code-copy-btn.is-copied .default {
    display: none;
}

.kairo-code-copy-btn.is-copied .copied {
    display: inline;
    color: #71f8e4;
}

/* Tables */
.kairo-table-wrapper {
    overflow-x: auto;
    margin: 2.5rem 0;
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-xl);
    background-color: var(--color-surface-container-lowest);
    box-shadow: var(--shadow-sm);
}

.gh-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
    text-align: left;
}

.gh-content th {
    background-color: var(--color-surface-container-low);
    color: var(--color-on-surface);
    font-weight: 700;
    padding: 0.85rem 1.25rem;
    border-bottom: 2px solid var(--color-outline-variant);
}

.gh-content td {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--color-outline-variant-light);
    color: var(--color-on-surface-variant);
}

.gh-content tr:last-child td {
    border-bottom: none;
}

.gh-content tr:hover td {
    background-color: var(--color-surface-container-low);
}

/* ==========================================================================
   13. Koenig Card Styles (Ghost Editor Components)
   ========================================================================== */
.kg-width-wide {
    position: relative;
    width: 100vw;
    min-width: 100%;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    max-width: 1000px;
    margin-top: 3rem;
    margin-bottom: 3rem;
}

.kg-width-full {
    position: relative;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    margin-top: 3.5rem;
    margin-bottom: 3.5rem;
}

.kg-width-full img {
    width: 100%;
    max-height: 700px;
    object-fit: cover;
}

.kg-card figcaption {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-on-surface-variant);
    margin-top: 0.65rem;
    font-style: italic;
}

/* Callout Card */
.kg-callout-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    background-color: var(--color-surface-container-low);
    border: 1px solid var(--color-outline-variant-light);
    margin: 2.25rem 0;
}

.kg-callout-emoji {
    font-size: 1.5rem;
    line-height: 1;
}

.kg-callout-text {
    flex: 1 1 auto;
    font-size: 1rem;
    line-height: 1.6;
}

/* Bookmark Card */
.kg-bookmark-card {
    width: 100%;
    margin: 2.5rem 0;
}

.kg-bookmark-container {
    display: flex;
    text-decoration: none !important;
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.kg-bookmark-container:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}

.kg-bookmark-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.5rem;
    flex: 1 1 auto;
}

.kg-bookmark-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-on-surface);
    margin-bottom: 0.5rem;
}

.kg-bookmark-description {
    font-size: 0.875rem;
    color: var(--color-on-surface-variant);
    line-height: 1.5;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kg-bookmark-metadata {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--color-on-surface-variant);
}

.kg-bookmark-icon {
    width: 20px;
    height: 20px;
}

.kg-bookmark-thumbnail {
    position: relative;
    width: 33%;
    min-width: 160px;
    max-width: 240px;
}

.kg-bookmark-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Button Card */
.kg-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-lg);
    background-color: var(--color-primary);
    color: #ffffff !important;
    font-weight: 600;
    text-decoration: none !important;
    transition: background-color 0.2s ease;
}

.kg-btn:hover {
    background-color: var(--color-primary-container);
}

/* Gallery Card */
.kg-gallery-card {
    margin: 2.5rem 0;
}

.kg-gallery-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.kg-gallery-row {
    display: flex;
    gap: 0.75rem;
}

.kg-gallery-image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* ==========================================================================
   14. Post Footer, Author Box & Comments
   ========================================================================== */
.kairo-post-tags-footer {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem 0;
    border-top: 1px solid var(--color-outline-variant-light);
    border-bottom: 1px solid var(--color-outline-variant-light);
    margin: 3.5rem 0;
    flex-wrap: wrap;
}

.kairo-tags-heading {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-on-surface-variant);
}

/* Author Bio Box */
.kairo-author-box {
    margin: 3.5rem 0;
}

.kairo-author-box-inner {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    padding: 2rem;
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
}

.kairo-author-box-avatar img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 2px solid var(--color-outline-variant-light);
}

.kairo-author-box-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-primary);
}

.kairo-author-box-name {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--color-on-surface);
    margin: 0.25rem 0 0.5rem;
}

.kairo-author-box-bio {
    font-size: 0.9375rem;
    color: var(--color-on-surface-variant);
    line-height: 1.6;
    margin-bottom: 0.85rem;
}

.kairo-author-box-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 0.8125rem;
    color: var(--color-on-surface-variant);
}

.kairo-author-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 600;
    color: var(--color-primary);
}

.kairo-author-link:hover {
    text-decoration: underline;
}

/* Comments Section */
.kairo-comments-section {
    margin-top: 3.5rem;
    padding-top: 3rem;
    border-top: 1px solid var(--color-outline-variant-light);
}

.kairo-comments-wrapper {
    margin-top: 1.5rem;
}

/* Prev / Next Post Navigation */
.kairo-post-nav {
    padding: 3rem 0;
    background-color: var(--color-surface-container-low);
    border-top: 1px solid var(--color-outline-variant-light);
    border-bottom: 1px solid var(--color-outline-variant-light);
}

.kairo-post-nav:not(:has(.kairo-post-nav-card)) {
    display: none !important;
}

.kairo-post-nav-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.kairo-post-nav-card.kairo-post-nav-next:only-child {
    grid-column: 2;
}

@media (max-width: 640px) {
    .kairo-post-nav-grid {
        grid-template-columns: 1fr;
    }

    .kairo-post-nav-card.kairo-post-nav-next:only-child {
        grid-column: 1;
    }
}

.kairo-post-nav-card {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-xl);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.kairo-post-nav-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.kairo-post-nav-sub {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.kairo-post-nav-next .kairo-post-nav-sub {
    margin-left: auto;
}

.kairo-post-nav-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-on-surface);
}

.kairo-post-nav-next .kairo-post-nav-title {
    text-align: right;
}

.kairo-related-section {
    padding: 4rem 0 2rem;
}

.kairo-related-section:not(:has(.kairo-post-card)) {
    display: none !important;
}

/* ==========================================================================
   15. Archive (Tag & Author) Hero
   ========================================================================== */
.kairo-archive-hero {
    position: relative;
    padding: 4.5rem 0 3.5rem;
    background-color: var(--color-surface);
    overflow: hidden;
}

.kairo-archive-hero-content {
    position: relative;
    z-index: 1;
    max-width: 840px;
    margin: 0 auto;
}

.kairo-archive-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-on-surface-variant);
    margin-bottom: 1.5rem;
}

.kairo-archive-title {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-on-surface);
    margin: 0.75rem 0 0.5rem;
}

.kairo-archive-desc {
    font-size: 1.15rem;
    color: var(--color-on-surface-variant);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.kairo-archive-count {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
}

.kairo-author-hero-card {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.kairo-author-hero-avatar-wrap img {
    width: 110px;
    height: 110px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid var(--color-outline-variant-light);
    box-shadow: var(--shadow-md);
}

.kairo-author-meta-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 0.875rem;
    color: var(--color-on-surface-variant);
    flex-wrap: wrap;
    margin-top: 0.75rem;
}

.kairo-author-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

/* ==========================================================================
   16. Newsletter CTA Section
   ========================================================================== */
.kairo-newsletter-section {
    padding: 3rem 0 5rem;
    position: relative;
}

.kairo-newsletter-card {
    position: relative;
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-3xl);
    padding: 3.5rem 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.kairo-newsletter-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 300px;
    background: radial-gradient(circle, rgba(70, 72, 212, 0.12) 0%, transparent 65%);
    pointer-events: none;
}

.kairo-newsletter-content {
    position: relative;
    z-index: 1;
    max-width: 640px;
    margin: 0 auto;
}

.kairo-newsletter-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--color-on-surface);
    margin: 1rem 0 1rem;
}

.kairo-newsletter-desc {
    font-size: 1.05rem;
    color: var(--color-on-surface-variant);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.kairo-newsletter-input-group {
    display: flex;
    gap: 0.75rem;
    max-width: 520px;
    margin: 0 auto;
}

@media (max-width: 540px) {
    .kairo-newsletter-input-group {
        flex-direction: column;
    }
}

.kairo-input {
    flex: 1 1 auto;
    padding: 0.85rem 1.25rem;
    font-size: 0.95rem;
    border-radius: var(--radius-lg);
    background-color: var(--color-surface-container-low);
    border: 1px solid var(--color-outline-variant);
    color: var(--color-on-surface);
    transition: all 0.2s ease;
    outline: none;
}

.kairo-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(70, 72, 212, 0.2);
    background-color: var(--color-surface-container-lowest);
}

.kairo-form-message {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.kairo-form-message.success {
    color: var(--color-secondary);
}

.kairo-form-message.error {
    color: var(--color-error);
}

.kairo-newsletter-form.success [data-members-success] {
    display: flex;
}

.kairo-newsletter-form.error [data-members-error] {
    display: flex;
}

.kairo-newsletter-form .loading {
    display: none;
}

.kairo-newsletter-form.loading .default {
    display: none;
}

.kairo-newsletter-form.loading .loading {
    display: inline;
}

.kairo-newsletter-guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.75rem;
    margin-top: 1.75rem;
    flex-wrap: wrap;
}

.kairo-guarantee-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-on-surface-variant);
}

.kairo-guarantee-item svg {
    width: 16px;
    height: 16px;
    color: var(--color-secondary);
}

/* ==========================================================================
   17. Footer
   ========================================================================== */
.kairo-footer {
    margin-top: auto;
    background-color: var(--color-surface-container-lowest);
    border-top: 1px solid var(--color-outline-variant-light);
    padding: 3.5rem 0 4rem;
}

.kairo-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 0;
}

@media (max-width: 900px) {
    .kairo-footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 540px) {
    .kairo-footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.kairo-footer-brand .kairo-brand-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    text-decoration: none;
}

.kairo-footer-brand .kairo-brand-icon {
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-xl);
    object-fit: cover;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.kairo-footer-brand .kairo-brand-link:hover .kairo-brand-icon {
    transform: scale(1.05);
}

.kairo-footer-brand .kairo-brand-text {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-headline, inherit);
    letter-spacing: -0.025em;
    color: var(--color-on-surface);
    transition: color 0.15s ease;
}

.kairo-footer-brand .kairo-brand-link:hover .kairo-brand-text {
    color: var(--color-primary);
}

.kairo-footer-desc {
    font-size: 0.9375rem;
    color: var(--color-on-surface-variant);
    line-height: 1.6;
    margin: 0.5rem 0 1rem;
    max-width: 380px;
}

.kairo-footer-copyright {
    font-size: 0.875rem;
    color: var(--color-on-surface-variant);
    margin-top: 1rem;
}

.kairo-footer-heading {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-on-surface);
    margin-bottom: 1rem;
}

.kairo-footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.kairo-footer-links a,
.kairo-footer-links button {
    font-size: 0.875rem;
    color: var(--color-on-surface-variant);
    transition: color 0.15s ease;
    text-decoration: none;
    background: none;
    border: none;
    padding: 0;
    font-family: inherit;
    cursor: pointer;
    text-align: left;
    display: inline-block;
}

.kairo-footer-links a:hover,
.kairo-footer-links button:hover {
    color: var(--color-primary);
}

/* ==========================================================================
   18. Error Pages
   ========================================================================== */
.kairo-error-section {
    position: relative;
    padding: 5rem 0;
    text-align: center;
    overflow: hidden;
}

.kairo-error-card {
    position: relative;
    z-index: 1;
    background-color: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant-light);
    border-radius: var(--radius-3xl);
    padding: 4rem 2rem;
    box-shadow: var(--shadow-xl);
}

.kairo-error-code {
    display: inline-block;
    font-size: 5rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.04em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

.kairo-error-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-on-surface);
    margin-bottom: 0.85rem;
}

.kairo-error-desc {
    font-size: 1.1rem;
    color: var(--color-on-surface-variant);
    max-width: 480px;
    margin: 0 auto 2.5rem;
}

.kairo-error-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.kairo-error-details {
    margin-top: 3rem;
    text-align: left;
    padding: 1.5rem;
    background-color: var(--color-surface-container-low);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-outline-variant);
}

.kairo-error-details-heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-error);
    margin-bottom: 0.75rem;
}

.kairo-error-stack {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-on-surface-variant);
    list-style: none;
}