/* ========== Material 3 Design System - Light & Dark Theme ========== */

/* ========== Dark Theme (Default) ========== */
@media (prefers-color-scheme: dark) {
    :root {
        /* Primary Colors - Dark */
        --md-sys-color-primary: #D0BCFF;
        --md-sys-color-on-primary: #381E72;
        --md-sys-color-primary-container: #4F378B;
        --md-sys-color-on-primary-container: #EADDFF;
        
        /* Secondary Colors - Dark */
        --md-sys-color-secondary: #CCC2DC;
        --md-sys-color-on-secondary: #332D41;
        --md-sys-color-secondary-container: #4A4458;
        --md-sys-color-on-secondary-container: #E8DEF8;
        
        /* Tertiary Colors - Dark */
        --md-sys-color-tertiary: #EFB8C8;
        --md-sys-color-on-tertiary: #492532;
        --md-sys-color-tertiary-container: #633B48;
        --md-sys-color-on-tertiary-container: #FFD8E4;
        
        /* Surface Colors - Dark */
        --md-sys-color-surface: #141218;
        --md-sys-color-surface-dim: #141218;
        --md-sys-color-surface-bright: #3B383E;
        --md-sys-color-surface-container-lowest: #0F0D13;
        --md-sys-color-surface-container-low: #1D1B20;
        --md-sys-color-surface-container: #211F26;
        --md-sys-color-surface-container-high: #2B2930;
        --md-sys-color-surface-container-highest: #36343B;
        --md-sys-color-on-surface: #E6E0E9;
        --md-sys-color-on-surface-variant: #CAC4D0;
        
        /* Outline - Dark */
        --md-sys-color-outline: #938F99;
        --md-sys-color-outline-variant: #49454F;
        
        /* Error - Dark */
        --md-sys-color-error: #F2B8B5;
        --md-sys-color-on-error: #601410;
        --md-sys-color-error-container: #8C1D18;
        --md-sys-color-on-error-container: #F9DEDC;
        
        /* Success - Dark */
        --md-sys-color-success: #81C995;
        --md-sys-color-success-container: #0D5223;
        --md-sys-color-on-success-container: #CEEAD6;
        
        /* Inverse */
        --md-sys-color-inverse-surface: #E6E0E9;
        --md-sys-color-inverse-on-surface: #322F35;
        --md-sys-color-inverse-primary: #6750A4;
        
        /* Shadow & Scrim */
        --md-sys-color-shadow: #000000;
        --md-sys-color-scrim: #000000;
        
        /* Navbar Background Dark */
        --navbar-bg: rgba(20, 18, 24, 0.7);
        --navbar-border: rgba(202, 196, 208, 0.2);
    }
}

/* ========== Light Theme ========== */
@media (prefers-color-scheme: light) {
    :root {
        /* Primary Colors - Light */
        --md-sys-color-primary: #6750A4;
        --md-sys-color-on-primary: #FFFFFF;
        --md-sys-color-primary-container: #EADDFF;
        --md-sys-color-on-primary-container: #21005D;
        
        /* Secondary Colors - Light */
        --md-sys-color-secondary: #625B71;
        --md-sys-color-on-secondary: #FFFFFF;
        --md-sys-color-secondary-container: #E8DEF8;
        --md-sys-color-on-secondary-container: #1D192B;
        
        /* Tertiary Colors - Light */
        --md-sys-color-tertiary: #7D5260;
        --md-sys-color-on-tertiary: #FFFFFF;
        --md-sys-color-tertiary-container: #FFD8E4;
        --md-sys-color-on-tertiary-container: #31111D;
        
        /* Surface Colors - Light */
        --md-sys-color-surface: #FFFBFE;
        --md-sys-color-surface-dim: #DED8E1;
        --md-sys-color-surface-bright: #FFFBFE;
        --md-sys-color-surface-container-lowest: #FFFFFF;
        --md-sys-color-surface-container-low: #F7F2FA;
        --md-sys-color-surface-container: #F3EEF6;
        --md-sys-color-surface-container-high: #EDE9F0;
        --md-sys-color-surface-container-highest: #E8E3EB;
        --md-sys-color-on-surface: #1C1B1F;
        --md-sys-color-on-surface-variant: #49454E;
        
        /* Outline - Light */
        --md-sys-color-outline: #79747E;
        --md-sys-color-outline-variant: #CAC4D0;
        
        /* Error - Light */
        --md-sys-color-error: #B3261E;
        --md-sys-color-on-error: #FFFFFF;
        --md-sys-color-error-container: #F9DEDC;
        --md-sys-color-on-error-container: #410E0B;
        
        /* Success - Light */
        --md-sys-color-success: #1B5E20;
        --md-sys-color-success-container: #C8E6C9;
        --md-sys-color-on-success-container: #003300;
        
        /* Inverse */
        --md-sys-color-inverse-surface: #313033;
        --md-sys-color-inverse-on-surface: #F5EFF7;
        --md-sys-color-inverse-primary: #D0BCFF;
        
        /* Shadow & Scrim */
        --md-sys-color-shadow: #000000;
        --md-sys-color-scrim: #000000;
        
        /* Navbar Background Light */
        --navbar-bg: rgba(255, 251, 254, 0.7);
        --navbar-border: rgba(121, 116, 126, 0.2);
    }
}

/* Default to Dark if no preference specified */
:root {
    /* Primary Colors - Dark (default) */
    --md-sys-color-primary: #D0BCFF;
    --md-sys-color-on-primary: #381E72;
    --md-sys-color-primary-container: #4F378B;
    --md-sys-color-on-primary-container: #EADDFF;
    
    /* Secondary Colors - Dark */
    --md-sys-color-secondary: #CCC2DC;
    --md-sys-color-on-secondary: #332D41;
    --md-sys-color-secondary-container: #4A4458;
    --md-sys-color-on-secondary-container: #E8DEF8;
    
    /* Tertiary Colors - Dark */
    --md-sys-color-tertiary: #EFB8C8;
    --md-sys-color-on-tertiary: #492532;
    --md-sys-color-tertiary-container: #633B48;
    --md-sys-color-on-tertiary-container: #FFD8E4;
    
    /* Surface Colors - Dark */
    --md-sys-color-surface: #141218;
    --md-sys-color-surface-dim: #141218;
    --md-sys-color-surface-bright: #3B383E;
    --md-sys-color-surface-container-lowest: #0F0D13;
    --md-sys-color-surface-container-low: #1D1B20;
    --md-sys-color-surface-container: #211F26;
    --md-sys-color-surface-container-high: #2B2930;
    --md-sys-color-surface-container-highest: #36343B;
    --md-sys-color-on-surface: #E6E0E9;
    --md-sys-color-on-surface-variant: #CAC4D0;
    
    /* Outline - Dark */
    --md-sys-color-outline: #938F99;
    --md-sys-color-outline-variant: #49454F;
    
    /* Error - Dark */
    --md-sys-color-error: #F2B8B5;
    --md-sys-color-on-error: #601410;
    --md-sys-color-error-container: #8C1D18;
    --md-sys-color-on-error-container: #F9DEDC;
    
    /* Success - Dark */
    --md-sys-color-success: #81C995;
    --md-sys-color-success-container: #0D5223;
    --md-sys-color-on-success-container: #CEEAD6;
    
    /* Inverse */
    --md-sys-color-inverse-surface: #E6E0E9;
    --md-sys-color-inverse-on-surface: #322F35;
    --md-sys-color-inverse-primary: #6750A4;
    
    /* Shadow & Scrim */
    --md-sys-color-shadow: #000000;
    --md-sys-color-scrim: #000000;
    
    /* Navbar Background Dark */
    --navbar-bg: rgba(20, 18, 24, 0.7);
    --navbar-border: rgba(202, 196, 208, 0.2);
    
    /* Typography Scale */
    --md-sys-typescale-display-large: 57px;
    --md-sys-typescale-display-medium: 45px;
    --md-sys-typescale-display-small: 36px;
    --md-sys-typescale-headline-large: 32px;
    --md-sys-typescale-headline-medium: 28px;
    --md-sys-typescale-headline-small: 24px;
    --md-sys-typescale-title-large: 22px;
    --md-sys-typescale-title-medium: 16px;
    --md-sys-typescale-title-small: 14px;
    --md-sys-typescale-body-large: 16px;
    --md-sys-typescale-body-medium: 14px;
    --md-sys-typescale-body-small: 12px;
    --md-sys-typescale-label-large: 14px;
    --md-sys-typescale-label-medium: 12px;
    --md-sys-typescale-label-small: 11px;
    
    /* State Layers */
    --md-sys-state-hover-opacity: 0.08;
    --md-sys-state-focus-opacity: 0.12;
    --md-sys-state-pressed-opacity: 0.12;
    --md-sys-state-dragged-opacity: 0.16;
    
    /* Elevation - Dark (uses tonal elevation) */
    --md-sys-elevation-level0: none;
    --md-sys-elevation-level1: 0 1px 3px 1px rgba(0,0,0,0.15), 0 1px 2px rgba(0,0,0,0.3);
    --md-sys-elevation-level2: 0 2px 6px 2px rgba(0,0,0,0.15), 0 1px 2px rgba(0,0,0,0.3);
    --md-sys-elevation-level3: 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.3);
    --md-sys-elevation-level4: 0 6px 10px 4px rgba(0,0,0,0.15), 0 2px 3px rgba(0,0,0,0.3);
    --md-sys-elevation-level5: 0 8px 12px 6px rgba(0,0,0,0.15), 0 4px 4px rgba(0,0,0,0.3);
    
    /* Shape */
    --md-sys-shape-corner-none: 0px;
    --md-sys-shape-corner-extra-small: 4px;
    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 12px;
    --md-sys-shape-corner-large: 16px;
    --md-sys-shape-corner-extra-large: 28px;
    --md-sys-shape-corner-full: 9999px;
    
    /* Motion */
    --md-sys-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
    --md-sys-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
    --md-sys-motion-duration-short1: 50ms;
    --md-sys-motion-duration-short2: 100ms;
    --md-sys-motion-duration-short3: 150ms;
    --md-sys-motion-duration-short4: 200ms;
    --md-sys-motion-duration-medium1: 250ms;
    --md-sys-motion-duration-medium2: 300ms;
    --md-sys-motion-duration-medium3: 350ms;
    --md-sys-motion-duration-medium4: 400ms;
    --md-sys-motion-duration-long1: 450ms;
    --md-sys-motion-duration-long2: 500ms;
}

/* ========== Reset & Base ========== */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Noto Sans JP', 'Roboto', system-ui, sans-serif;
    background-color: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    line-height: 1.5;
    letter-spacing: 0.25px;
}

/* ========== Navigation Bar (Top App Bar) ========== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--navbar-bg);
    border-bottom: 1px solid var(--navbar-border);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: var(--md-sys-typescale-title-large);
    font-weight: 500;
    color: var(--md-sys-color-primary);
    letter-spacing: 0;
}

.nav-brand .material-icons {
    font-size: 28px;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    position: relative;
    padding: 10px 24px;
    border-radius: var(--md-sys-shape-corner-full);
    text-decoration: none;
    color: var(--md-sys-color-on-surface-variant);
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    letter-spacing: 0.1px;
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: var(--md-sys-color-on-surface);
    opacity: 0;
    transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.nav-link:hover::before {
    opacity: var(--md-sys-state-hover-opacity);
}

.nav-link:hover {
    color: var(--md-sys-color-on-surface);
}

/* ========== Hero Section ========== */

.hero {
    padding: 120px 24px 80px;
    background: linear-gradient(180deg, 
        var(--md-sys-color-primary-container) 0%, 
        var(--md-sys-color-surface) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, 
        rgba(208, 188, 255, 0.15) 0%, 
        transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: var(--md-sys-typescale-display-medium);
    font-weight: 400;
    color: var(--md-sys-color-on-surface);
    margin-bottom: 16px;
    letter-spacing: -0.25px;
}

.hero-subtitle {
    font-size: var(--md-sys-typescale-headline-small);
    font-weight: 400;
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 40px;
}

.hero-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
}

/* ========== Buttons (Filled) ========== */

.btn-filled {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 56px;
    padding: 0 32px;
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border: none;
    border-radius: var(--md-sys-shape-corner-full);
    font-family: inherit;
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    letter-spacing: 0.1px;
    text-decoration: none;
    cursor: pointer;
    box-shadow: var(--md-sys-elevation-level1);
    transition: all var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
    position: relative;
    overflow: hidden;
}

.btn-filled::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: var(--md-sys-color-on-primary);
    opacity: 0;
    transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.btn-filled:hover {
    box-shadow: var(--md-sys-elevation-level2);
    transform: translateY(-2px);
}

.btn-filled:hover::before {
    opacity: var(--md-sys-state-hover-opacity);
}

.btn-filled:active {
    transform: translateY(0);
    box-shadow: var(--md-sys-elevation-level1);
}

.btn-filled:active::before {
    opacity: var(--md-sys-state-pressed-opacity);
}

.btn-filled .material-icons {
    font-size: 20px;
    position: relative;
    z-index: 1;
}

/* ========== Chips (Filter/Assist) ========== */

.chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 32px;
    padding: 0 16px;
    background-color: var(--md-sys-color-surface-container-high);
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-small);
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    color: var(--md-sys-color-on-surface-variant);
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.chip:hover {
    background-color: var(--md-sys-color-surface-container-highest);
}

/* ========== Search Bar ========== */

.search-container {
    max-width: 600px;
    margin: 0 auto 0;
    position: relative;
}

.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-wrapper .material-icons {
    position: absolute;
    left: 20px;
    color: var(--md-sys-color-on-surface-variant);
    font-size: 22px;
    pointer-events: none;
    transition: color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.search-input {
    width: 100%;
    height: 56px;
    padding: 0 56px 0 56px;
    background-color: var(--md-sys-color-surface-container-high);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-full);
    font-family: inherit;
    font-size: var(--md-sys-typescale-body-large);
    color: var(--md-sys-color-on-surface);
    outline: none;
    transition: all var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard);
}

.search-input::placeholder {
    color: var(--md-sys-color-on-surface-variant);
    opacity: 0.7;
}

.search-input:focus {
    border-color: var(--md-sys-color-primary);
    background-color: var(--md-sys-color-surface-container);
    box-shadow: 0 0 0 2px rgba(208, 188, 255, 0.2);
}

.search-input:focus ~ .material-icons,
.search-wrapper:focus-within .material-icons {
    color: var(--md-sys-color-primary);
}

.search-clear {
    position: absolute;
    right: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: var(--md-sys-shape-corner-full);
    color: var(--md-sys-color-on-surface-variant);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.search-clear.visible {
    opacity: 1;
    visibility: visible;
}

.search-clear:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.search-clear .material-icons {
    position: static;
    font-size: 20px;
    pointer-events: auto;
}

.search-results-count {
    text-align: center;
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin-top: 12px;
    opacity: 0;
    transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.search-results-count.visible {
    opacity: 1;
}

/* Search match highlight */
.card.search-hidden,
.feature-card.search-hidden,
.info-card.search-hidden {
    display: none !important;
}

.section.search-hidden {
    display: none !important;
}

.search-no-results {
    text-align: center;
    padding: 80px 24px;
    color: var(--md-sys-color-on-surface-variant);
    display: none;
}

.search-no-results.visible {
    display: block;
}

.search-no-results .material-icons {
    font-size: 64px;
    color: var(--md-sys-color-outline);
    margin-bottom: 16px;
    display: block;
}

.search-no-results p {
    font-size: var(--md-sys-typescale-title-medium);
}

/* ========== Container ========== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 48px 24px;
}

/* ========== Section ========== */

.section {
    margin-bottom: 64px;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.section-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--md-sys-color-primary-container);
    border-radius: var(--md-sys-shape-corner-medium);
    color: var(--md-sys-color-on-primary-container);
    font-size: 24px;
}

.section-header h2 {
    font-size: var(--md-sys-typescale-headline-medium);
    font-weight: 400;
    color: var(--md-sys-color-on-surface);
    letter-spacing: 0;
}

/* ========== Card Grid ========== */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 16px;
}

/* ========== Card (Elevated/Filled) ========== */

.card {
    position: relative;
    background-color: var(--md-sys-color-surface-container-low);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 24px;
    transition: all var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background-color: var(--md-sys-color-primary);
    opacity: 0;
    transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
    pointer-events: none;
}

.card:hover {
    background-color: var(--md-sys-color-surface-container);
    box-shadow: var(--md-sys-elevation-level2);
}

.card:hover::before {
    opacity: 0.05;
}

/* Highlight Card (通報機能など) */
.card.highlight-card {
    background: linear-gradient(135deg, var(--md-sys-color-surface-container) 0%, var(--md-sys-color-surface-container-high) 100%);
    border: 1px solid var(--md-sys-color-outline-variant);
}

.card.highlight-card .card-header .material-icons {
    background-color: var(--md-sys-color-error-container);
    color: var(--md-sys-color-on-error-container);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--md-sys-color-on-surface-variant);
    font-size: var(--md-sys-typescale-body-medium);
}

.feature-item .material-icons {
    font-size: 20px;
    color: var(--md-sys-color-primary);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.card-header .material-icons {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--md-sys-color-secondary-container);
    border-radius: var(--md-sys-shape-corner-full);
    color: var(--md-sys-color-on-secondary-container);
    font-size: 20px;
}

.card-header h3 {
    font-size: var(--md-sys-typescale-title-large);
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
    letter-spacing: 0;
}

.card-description {
    font-size: var(--md-sys-typescale-body-large);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 20px;
    line-height: 1.6;
}

.card-content {
    margin-bottom: 20px;
}

/* ========== Parameters ========== */

.param {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 0;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.param:last-child {
    border-bottom: none;
}

.param-name {
    font-family: 'JetBrains Mono', 'Roboto Mono', monospace;
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 500;
    color: var(--md-sys-color-on-primary-container);
    background-color: var(--md-sys-color-primary-container);
    padding: 6px 12px;
    border-radius: var(--md-sys-shape-corner-small);
}

.param-type {
    font-size: var(--md-sys-typescale-label-medium);
    font-weight: 500;
    color: var(--md-sys-color-on-surface-variant);
    background-color: var(--md-sys-color-surface-container-highest);
    padding: 4px 10px;
    border-radius: var(--md-sys-shape-corner-extra-small);
}

.param-desc {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    flex-basis: 100%;
    margin-top: 4px;
    padding-left: 4px;
}

.param-options {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    padding: 16px;
    background-color: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-medium);
    margin: 12px 0;
    line-height: 2;
}

.param-options code {
    background-color: var(--md-sys-color-tertiary-container);
    color: var(--md-sys-color-on-tertiary-container);
    padding: 4px 8px;
    border-radius: var(--md-sys-shape-corner-extra-small);
    font-size: var(--md-sys-typescale-label-medium);
    font-weight: 500;
    font-family: 'JetBrains Mono', 'Roboto Mono', monospace;
}

/* ========== Example (Code Block) ========== */

.card-example {
    background-color: var(--md-sys-color-surface-container-highest);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 16px 20px;
    margin-bottom: 20px;
    border-left: 3px solid var(--md-sys-color-primary);
}

.example-label {
    font-size: var(--md-sys-typescale-label-medium);
    font-weight: 500;
    color: var(--md-sys-color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
    margin-bottom: 8px;
}

.card-example code {
    font-family: 'JetBrains Mono', 'Roboto Mono', monospace;
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface);
    word-break: break-all;
    line-height: 1.6;
}

/* ========== Badge (Small Label) ========== */

.badge {
    position: absolute;
    top: 20px;
    right: 20px;
    display: inline-flex;
    align-items: center;
    height: 24px;
    padding: 0 10px;
    border-radius: var(--md-sys-shape-corner-full);
    font-size: var(--md-sys-typescale-label-small);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.badge.admin {
    background-color: var(--md-sys-color-error-container);
    color: var(--md-sys-color-on-error-container);
}

.badge.everyone {
    background-color: var(--md-sys-color-success-container);
    color: var(--md-sys-color-on-success-container);
}

/* ========== Info Box (Card Variant) ========== */

.info-box {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background-color: var(--md-sys-color-secondary-container);
    border-radius: var(--md-sys-shape-corner-medium);
    margin-bottom: 20px;
}

.info-box .material-icons {
    font-size: 20px;
    color: var(--md-sys-color-on-secondary-container);
    flex-shrink: 0;
    margin-top: 2px;
}

.info-box span {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-secondary-container);
    line-height: 1.5;
}

/* ========== Info Card (Prominent) ========== */

.info-card {
    background: linear-gradient(135deg, 
        var(--md-sys-color-primary-container) 0%, 
        var(--md-sys-color-tertiary-container) 100%);
    border-radius: var(--md-sys-shape-corner-extra-large);
    padding: 40px;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, 
        rgba(255,255,255,0.08) 0%, 
        transparent 70%);
    pointer-events: none;
}

.info-card h4 {
    font-size: var(--md-sys-typescale-title-large);
    font-weight: 500;
    color: var(--md-sys-color-on-primary-container);
    margin-bottom: 28px;
    text-align: center;
    position: relative;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    position: relative;
    max-width: 100%;
}

@media (min-width: 1200px) {
    .info-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background-color: rgba(0, 0, 0, 0.25);
    padding: 20px;
    border-radius: var(--md-sys-shape-corner-large);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.info-item:hover {
    background-color: rgba(0, 0, 0, 0.35);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.1);
}

.info-item .material-icons {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--md-sys-color-primary);
    border-radius: var(--md-sys-shape-corner-medium);
    color: var(--md-sys-color-on-primary);
    font-size: 24px;
    flex-shrink: 0;
}

.info-item strong {
    display: block;
    font-size: var(--md-sys-typescale-title-medium);
    font-weight: 500;
    color: var(--md-sys-color-on-primary-container);
    margin-bottom: 4px;
}

.info-item p {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-primary-container);
    opacity: 0.8;
}

/* ========== Feature Grid ========== */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.feature-card {
    background-color: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 24px;
    border: 1px solid var(--md-sys-color-outline-variant);
    transition: all var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        var(--md-sys-color-primary) 0%, 
        var(--md-sys-color-tertiary) 100%);
    opacity: 0;
    transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.feature-card:hover {
    border-color: var(--md-sys-color-outline);
    box-shadow: var(--md-sys-elevation-level1);
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background-color: var(--md-sys-color-primary-container);
    border-radius: var(--md-sys-shape-corner-large);
    color: var(--md-sys-color-on-primary-container);
    font-size: 28px;
    margin-bottom: 20px;
}

.feature-card h4 {
    font-size: var(--md-sys-typescale-title-medium);
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 16px;
    line-height: 1.5;
}

.feature-card ul {
    list-style: none;
    padding-left: 0;
}

.feature-card li {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
}

.feature-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background-color: var(--md-sys-color-primary);
    border-radius: var(--md-sys-shape-corner-full);
}

/* ========== FAB (Floating Action Button) ========== */

.fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border: none;
    border-radius: var(--md-sys-shape-corner-large);
    box-shadow: var(--md-sys-elevation-level3);
    cursor: pointer;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.8);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.fab.visible {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.fab:hover {
    box-shadow: var(--md-sys-elevation-level4);
    transform: scale(1.1);
}

.fab .material-icons {
    font-size: 24px;
    line-height: 1;
}

/* ========== Footer ========== */

.footer {
    background-color: var(--md-sys-color-surface-container-low);
    border-top: 1px solid var(--md-sys-color-outline-variant);
    padding: 48px 24px;
    text-align: center;
}

.footer-content p {
    font-size: var(--md-sys-typescale-body-large);
    color: var(--md-sys-color-on-surface);
    font-weight: 500;
}

.footer-sub {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin-top: 8px;
}

/* ========== Divider ========== */

.divider {
    height: 1px;
    background-color: var(--md-sys-color-outline-variant);
    margin: 24px 0;
}

/* ========== Responsive Design ========== */

@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .hero {
        padding: 100px 16px 60px;
    }
    
    .hero h1 {
        font-size: var(--md-sys-typescale-display-small);
    }
    
    .hero-subtitle {
        font-size: var(--md-sys-typescale-title-large);
    }
    
    .container {
        padding: 32px 16px;
    }
    
    .section-header h2 {
        font-size: var(--md-sys-typescale-headline-small);
    }
    
    .info-card {
        padding: 24px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .fab {
        bottom: 16px;
        right: 16px;
    }
}

/* ========== Custom Scrollbar ========== */

::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--md-sys-color-surface-container-low);
}

::-webkit-scrollbar-thumb {
    background: var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-full);
    border: 3px solid var(--md-sys-color-surface-container-low);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--md-sys-color-on-surface-variant);
}

/* ========== Selection ========== */

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

/* ========== Focus States ========== */

:focus-visible {
    outline: 2px solid var(--md-sys-color-primary);
    outline-offset: 2px;
}

/* ========== Ripple Effect ========== */

.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background-color: var(--md-sys-color-on-surface);
    border-radius: var(--md-sys-shape-corner-full);
    transform: translate(-50%, -50%);
    opacity: 0;
}

.ripple:active::after {
    width: 200%;
    height: 200%;
    opacity: var(--md-sys-state-pressed-opacity);
    transition: width 0.3s, height 0.3s, opacity 0.1s;
}

/* ========== Smooth Animations ========== */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}