/* Planet Design System - Styles */

:root {
    /* Light Theme Colors */
    --brand-primary: #6788EC;
    --brand-soft: #94B7F4;
    --brand-dark: #4B6CCD;
    
    --surface-primary: #FFFFFF;
    --surface-card: #FFFFFF;
    --surface-input: #F4F6FA;
    
    --text-primary: #2E3345;
    --text-secondary: #616F9E;
    --text-tertiary: #909ABB;
    --text-inverse: #FFFFFF;
    
    --border-default: #E9EDF4;
    --divider: #E9EDF4;
    
    --gradient-start: #6788EC;
    --gradient-end: #B9C8F5;
    
    --status-success: #27AE60;
    --status-success-bg: #EAF7F0;
    --status-error: #EB5757;
    --status-error-bg: #FDEFEF;
    --status-warning: #FFB22B;
    --status-warning-bg: #FFF8EA;
    --status-violet: #7460EE;
    --status-violet-bg: #F2F0FE;
    
    --bg-gradient: linear-gradient(135deg, #F8F9FE 0%, #FFFFFF 100%);
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    /* Dark Theme Colors */
    --brand-primary: #6788EC;
    --brand-soft: #2C3560;
    --brand-dark: #4B6CCD;
    
    --surface-primary: #1E212B;
    --surface-card: #2D3243;
    --surface-input: #242836;
    
    --text-primary: #F6F8FF;
    --text-secondary: #A1AED3;
    --text-tertiary: #727DA6;
    --text-inverse: #1E212B;
    
    --border-default: #3B4259;
    --divider: #3B4259;
    
    --gradient-start: #17181C;
    --gradient-end: #212229;
    
    --status-success: #27AE60;
    --status-success-bg: #153325;
    --status-error: #EB5757;
    --status-error-bg: #472B33;
    --status-warning: #FFB22B;
    --status-warning-bg: #3A2C14;
    --status-violet: #7460EE;
    --status-violet-bg: #353754;
    
    --bg-gradient: linear-gradient(135deg, #1A1D26 0%, #1E212B 100%);
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* ============================================================================
   ANIMATED BACKGROUND
   ============================================================================ */

.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 20s infinite ease-in-out;
    transition: opacity 0.3s ease;
}

[data-theme="dark"] .floating-shape {
    opacity: 0.05;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--brand-primary);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: var(--brand-soft);
    bottom: -50px;
    right: -50px;
    animation-delay: 7s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: var(--status-violet);
    top: 50%;
    right: 10%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* ============================================================================
   HEADER
   ============================================================================ */

header {
    position: relative;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    padding: 80px 40px 120px;
    text-align: center;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="1" fill="white" opacity="0.3"/></svg>');
    background-size: 30px 30px;
    opacity: 0.3;
    animation: drift 30s linear infinite;
}

@keyframes drift {
    from { transform: translate(0, 0); }
    to { transform: translate(30px, 30px); }
}

.logo {
    font-size: 48px;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
    letter-spacing: -1px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
}

.tagline {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.version-badge {
    display: inline-block;
    margin-top: 20px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* ============================================================================
   NAVIGATION
   ============================================================================ */

nav {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    z-index: 100;
    border-bottom: 1px solid var(--border-default);
}

[data-theme="dark"] nav {
    background: rgba(30, 33, 43, 0.95);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    gap: 32px;
    overflow-x: auto;
}

.nav-container::-webkit-scrollbar {
    height: 3px;
}

.nav-container::-webkit-scrollbar-track {
    background: transparent;
}

.nav-container::-webkit-scrollbar-thumb {
    background: var(--brand-primary);
    border-radius: 10px;
}

.nav-link {
    display: block;
    padding: 20px 0;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--brand-primary);
    border-bottom-color: var(--brand-primary);
}

/* ============================================================================
   MAIN CONTENT
   ============================================================================ */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 40px;
    position: relative;
    z-index: 1;
}

/* ============================================================================
   SECTIONS
   ============================================================================ */

.section {
    margin-bottom: 80px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section:nth-child(2) { animation-delay: 0.1s; }
.section:nth-child(3) { animation-delay: 0.2s; }
.section:nth-child(4) { animation-delay: 0.3s; }
.section:nth-child(5) { animation-delay: 0.4s; }

.section-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-icon {
    font-size: 40px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

/* ============================================================================
   STATS GRID
   ============================================================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.stat-card {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-soft) 100%);
    padding: 32px;
    border-radius: 20px;
    color: white;
    text-align: center;
    box-shadow: 0 8px 24px rgba(103, 136, 236, 0.2);
    transform: translateY(0);
    transition: all 0.4s ease;
}

.stat-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 40px rgba(103, 136, 236, 0.3);
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 8px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.stat-label {
    font-size: 16px;
    font-weight: 600;
    opacity: 0.9;
}

/* ============================================================================
   THEME SHOWCASE
   ============================================================================ */

.theme-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 32px;
}

.theme-preview {
    border-radius: 20px;
    padding: 32px;
    border: 2px solid var(--border-default);
    position: relative;
    overflow: hidden;
}

.theme-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--brand-primary) 0%, var(--status-violet) 100%);
}

.theme-preview.light {
    background: #FFFFFF;
    color: #2E3345;
}

.theme-preview.dark {
    background: #1E212B;
    color: #F6F8FF;
}

.theme-preview-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-preview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: 16px;
}

.theme-color-dot {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* ============================================================================
   COLOR GRID
   ============================================================================ */

.color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.color-card {
    background: var(--surface-card);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-default);
}

.color-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px rgba(103, 136, 236, 0.15);
}

.color-preview {
    height: 140px;
    position: relative;
    overflow: hidden;
}

.color-preview::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40%;
    background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.1));
}

.color-info {
    padding: 20px;
}

.color-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.color-values {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.color-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    padding: 6px 12px;
    background: var(--surface-input);
    border-radius: 8px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--border-default);
}

.color-value:hover {
    background: var(--brand-primary);
    color: white;
    transform: scale(1.05);
}

/* ============================================================================
   COMPONENT SHOWCASE
   ============================================================================ */

.component-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 32px;
}

.component-card {
    background: var(--surface-card);
    border-radius: 20px;
    padding: 32px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid var(--border-default);
    transition: all 0.3s ease;
}

.component-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.component-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.button {
    padding: 14px 28px;
    border-radius: 12px;
    border: none;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: 'Manrope', sans-serif;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.button-primary {
    background: var(--brand-primary);
    color: white;
}

.button-primary:hover {
    background: var(--brand-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(103, 136, 236, 0.3);
}

.button-secondary {
    background: var(--surface-input);
    color: var(--text-primary);
}

.button-secondary:hover {
    background: var(--brand-soft);
    transform: translateY(-2px);
}

.button-success {
    background: var(--status-success);
    color: white;
}

.button-success:hover {
    background: #229954;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(39, 174, 96, 0.3);
}

.button-danger {
    background: var(--status-error);
    color: white;
}

.button-danger:hover {
    background: #C74952;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(235, 87, 87, 0.3);
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

/* ============================================================================
   CARDS
   ============================================================================ */

.example-card {
    background: var(--surface-card);
    border: 1px solid var(--border-default);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 16px;
    transition: all 0.3s ease;
}

.example-card:hover {
    box-shadow: 0 8px 24px var(--shadow-color);
    transform: translateY(-2px);
}

.example-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.example-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ============================================================================
   STATUS BADGES
   ============================================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    margin-right: 8px;
    margin-bottom: 8px;
}

.badge-success {
    background: var(--status-success-bg);
    color: var(--status-success);
}

.badge-error {
    background: var(--status-error-bg);
    color: var(--status-error);
}

.badge-warning {
    background: var(--status-warning-bg);
    color: var(--status-warning);
}

.badge-violet {
    background: var(--status-violet-bg);
    color: var(--status-violet);
}

/* ============================================================================
   CODE BLOCK
   ============================================================================ */

.code-block {
    background: #1E212B;
    color: #F6F8FF;
    padding: 24px;
    border-radius: 16px;
    overflow-x: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    margin: 20px 0;
    box-shadow: 0 8px 24px var(--shadow-color);
    position: relative;
    border: 1px solid var(--border-default);
}

[data-theme="dark"] .code-block {
    background: #0D0E12;
    border-color: #2D3243;
}

.code-block::before {
    content: 'Dart';
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 12px;
    color: var(--brand-soft);
    font-weight: 600;
}

.code-keyword { color: #C792EA; }
.code-string { color: #C3E88D; }
.code-function { color: #82AAFF; }
.code-comment { color: #616F9E; }
.code-number { color: #F78C6C; }

/* ============================================================================
   INPUT FIELDS
   ============================================================================ */

.input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-default);
    border-radius: 12px;
    font-size: 16px;
    font-family: 'Manrope', sans-serif;
    background: var(--surface-input);
    color: var(--text-primary);
    transition: all 0.3s ease;
    margin-bottom: 16px;
}

.input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(103, 136, 236, 0.1);
}

.input::placeholder {
    color: var(--text-tertiary);
}

/* ============================================================================
   FOOTER
   ============================================================================ */

footer {
    background: var(--surface-card);
    color: var(--text-primary);
    padding: 60px 40px 40px;
    margin-top: 120px;
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--border-default);
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--brand-primary) 0%, var(--status-violet) 100%);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.footer-link:hover {
    color: var(--brand-primary);
    transform: translateY(-2px);
}

.footer-copy {
    color: var(--text-tertiary);
    font-size: 14px;
}

/* ============================================================================
   THEME TOGGLE
   ============================================================================ */

.theme-toggle {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--brand-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 8px 24px rgba(103, 136, 236, 0.4);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    overflow: hidden;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 12px 32px rgba(103, 136, 236, 0.5);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-icon {
    position: absolute;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-icon.sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-icon.moon {
    opacity: 0;
    transform: rotate(180deg) scale(0);
}

[data-theme="dark"] .theme-icon.sun {
    opacity: 0;
    transform: rotate(-180deg) scale(0);
}

[data-theme="dark"] .theme-icon.moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* ============================================================================
   TOOLTIP
   ============================================================================ */

.tooltip {
    position: fixed;
    background: var(--text-primary);
    color: white;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.tooltip.show {
    opacity: 1;
}

/* ============================================================================
   ANIMATIONS
   ============================================================================ */

[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

[data-animate].animated {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    .section-title {
        font-size: 28px;
    }
    
    .container {
        padding: 40px 20px;
    }
    
    .color-grid,
    .component-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-container {
        padding: 0 20px;
    }
    
    .theme-showcase {
        grid-template-columns: 1fr;
    }
    
    .theme-toggle {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
        font-size: 24px;
    }
    
    header {
        padding: 60px 20px 80px;
    }
    
    .logo {
        font-size: 36px;
    }
    
    .tagline {
        font-size: 16px;
    }
}