:root {
    --primary-rgb: 35, 157, 173;
    --primary-color: rgb(var(--primary-rgb));
    --primary-hover: #1b7f8c;
    --secondary-color: #0a2540;
    --accent-color: #FF6B6B;
    --bg-color: #ffffff;
    --bg-alt-color: #f9fafb;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #e5e7eb;
    --card-bg: #ffffff;
    --header-bg: rgba(255, 255, 255, 0.9);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --max-width: 1200px;
    --border-radius: 12px;
}

.dark-theme {
    --primary-rgb: 46, 196, 217;
    --primary-color: rgb(var(--primary-rgb));
    --primary-hover: #239dad;
    --secondary-color: #f8fafc;
    --bg-color: #0f172a;
    --bg-alt-color: #1e293b;
    --text-color: #f1f5f9;
    --text-light: #94a3b8;
    --border-color: #334155;
    --card-bg: #1e293b;
    --header-bg: rgba(15, 23, 42, 0.9);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s, color 0.3s;
}

::selection {
    background-color: rgba(var(--primary-rgb), 0.2);
    color: var(--primary-color);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

ul {
    list-style: none;
}

/* Layout Utilities */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-color);
    background-color: var(--bg-alt-color);
}

/* Header */
header {
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s, border-color 0.3s;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-light);
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Fix for button color in nav */
.nav-links .btn {
    color: white;
}

.nav-links .btn:hover {
    color: white;
}

.controls {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-left: 20px;
    padding-left: 20px;
    border-left: 1px solid var(--border-color);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
    border-radius: 50%;
    transition: background-color 0.2s;
    color: var(--text-color);
}

.theme-toggle:hover {
    background-color: var(--bg-alt-color);
}

select.lang-select {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 5px 10px;
    border-radius: 6px;
    font-family: var(--font-main);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 100px 0 80px;
    text-align: center;
    background: radial-gradient(circle at top right, rgba(var(--primary-rgb), 0.15) 0%, transparent 40%),
        radial-gradient(circle at bottom left, rgba(255, 107, 107, 0.05) 0%, transparent 40%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 20px;
    line-height: 1.1;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 40px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 60px;
}

/* Demo Section */
.demo-preview {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    margin-top: 40px;
    transition: background-color 0.3s, border-color 0.3s;
}

.demo-preview + .demo-preview {
    margin-top: 30px;
}

.demo-header {
    background: var(--bg-alt-color);
    padding: 10px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #d1d5db;
}

.demo-content {
    display: flex;
    min-height: 400px;
}

.code-pane,
.preview-pane {
    flex: 1;
    text-align: left;
    display: flex;
    flex-direction: column;
}

.pane-title {
    padding: 12px 20px;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
    background-color: var(--bg-color);
}

.code-pane {
    background-color: var(--bg-alt-color);
    border-right: 1px solid var(--border-color);
}

.code-pane pre {
    flex: 1;
    padding: 20px;
    margin: 0;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: var(--text-color);
    overflow: auto;
}

/* Syntax Highlighting for MADOLA */
.language-madola .madola-decorator {
    color: #e06c75;
    font-weight: 600;
}

.language-madola .madola-keyword {
    color: #c678dd;
    font-weight: 600;
}

.language-madola .madola-function {
    color: #61afef;
    font-weight: 500;
}

.language-madola .madola-number {
    color: #d19a66;
}

.language-madola .madola-operator {
    color: #56b6c2;
}

/* Syntax Highlighting for C++ */
.language-cpp .hljs-keyword {
    color: #c678dd;
    font-weight: 600;
}

.language-cpp .hljs-type {
    color: #e5c07b;
    font-weight: 500;
}

.language-cpp .hljs-title.function_ {
    color: #61afef;
    font-weight: 500;
}

.language-cpp .hljs-number {
    color: #d19a66;
}

.language-cpp .hljs-built_in {
    color: #56b6c2;
    font-weight: 500;
}

.language-cpp .hljs-meta {
    color: #98c379;
    font-weight: 500;
}

/* Light theme overrides for better contrast */
body:not(.dark-theme) .language-madola .madola-decorator {
    color: #d73a49;
}

body:not(.dark-theme) .language-madola .madola-keyword {
    color: #6f42c1;
}

body:not(.dark-theme) .language-madola .madola-function {
    color: #005cc5;
}

body:not(.dark-theme) .language-madola .madola-number {
    color: #e36209;
}

body:not(.dark-theme) .language-madola .madola-operator {
    color: #005cc5;
}

body:not(.dark-theme) .language-cpp .hljs-keyword {
    color: #6f42c1;
}

body:not(.dark-theme) .language-cpp .hljs-type {
    color: #d73a49;
}

body:not(.dark-theme) .language-cpp .hljs-title.function_ {
    color: #005cc5;
}

body:not(.dark-theme) .language-cpp .hljs-number {
    color: #e36209;
}

body:not(.dark-theme) .language-cpp .hljs-built_in {
    color: #005cc5;
}

body:not(.dark-theme) .language-cpp .hljs-meta {
    color: #22863a;
}

.preview-pane {
    background-color: var(--card-bg);
    color: var(--text-color);
}

.preview-pane > *:not(.pane-title) {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.math-display {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--bg-alt-color);
    transition: background-color 0.3s;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: transform 0.2s, background-color 0.3s;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Comparison Section */
.comparison {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5rem;
    color: var(--secondary-color);
}

.comparison-table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.comparison-table th,
.comparison-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
}

.comparison-table th {
    background-color: var(--bg-alt-color);
    font-weight: 600;
    color: var(--secondary-color);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.check {
    color: #10b981;
}

.cross {
    color: #ef4444;
}

.warn {
    color: #f59e0b;
}

/* Footer */
footer {
    background-color: #0f172a;
    /* Always dark footer */
    color: white;
    padding: 60px 0 20px;
}

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

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: white;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: #9ca3af;
}

.footer-col a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
    font-size: 0.9rem;
}

/* Color Themes */
body[data-accent="blue"] {
    --primary-rgb: 59, 130, 246;
    --primary-color: rgb(var(--primary-rgb));
    --primary-hover: #2563eb;
}

body[data-accent="purple"] {
    --primary-rgb: 139, 92, 246;
    --primary-color: rgb(var(--primary-rgb));
    --primary-hover: #7c3aed;
}

body[data-accent="orange"] {
    --primary-rgb: 249, 115, 22;
    --primary-color: rgb(var(--primary-rgb));
    --primary-hover: #ea580c;
}

/* Default is Teal, defined in :root */

.dark-theme[data-accent="blue"] {
    --primary-rgb: 96, 165, 250;
    --primary-color: rgb(var(--primary-rgb));
    --primary-hover: #3b82f6;
}

.dark-theme[data-accent="purple"] {
    --primary-rgb: 167, 139, 250;
    --primary-color: rgb(var(--primary-rgb));
    --primary-hover: #8b5cf6;
}

.dark-theme[data-accent="orange"] {
    --primary-rgb: 251, 146, 60;
    --primary-color: rgb(var(--primary-rgb));
    --primary-hover: #f97316;
}

/* Color Picker */
.color-picker-wrapper {
    position: relative;
}

.color-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.color-btn:hover {
    background-color: var(--bg-alt-color);
}

.color-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    display: none;
    /* Hidden by default */
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    box-shadow: var(--shadow);
    z-index: 101;
}

.color-dropdown.show {
    display: grid;
}

.color-option {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.2s;
}

.color-option:hover {
    transform: scale(1.1);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 102;
}

.hamburger span {
    width: 30px;
    height: 3px;
    background: var(--text-color);
    border-radius: 10px;
    transition: all 0.3s linear;
    position: relative;
    transform-origin: 1px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .demo-content {
        flex-direction: column;
    }

    .code-pane {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 70%;
        max-width: 300px;
        background: var(--card-bg);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 20px 20px;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease-in-out;
        z-index: 101;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.1rem;
        margin-bottom: 15px;
        width: 100%;
    }

    .controls {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        margin-top: 20px;
        padding-top: 20px;
        border-top: 1px solid var(--border-color);
        width: 100%;
        justify-content: space-between;
    }

    /* Hamburger Animation */
    .hamburger.active span:first-child {
        transform: rotate(45deg);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg);
    }
}