/* GlaSSLess - Site Styles */
/* Font: Montserrat */

:root {
    --color-primary: #71e3f4;
    --color-primary-dark: #5bc9d9;
    --color-secondary: #71e3f4;
    --color-accent: #71e3f4;
    --color-danger: #f47171;
    --color-text: #e8eef3;
    --color-text-secondary: #9ab3c7;
    --color-bg: #071727;
    --color-bg-alt: #051219;
    --color-bg-gradient-start: #071727;
    --color-bg-gradient-end: #051219;
    --color-border: #1a3a52;
    --color-code-bg: #0a1f2e;
    --font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    --max-width: 1200px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.4);
}

/* Utility Classes */
.text-white {
    color: #ffffff;
}

.text-highlight {
    color: var(--color-primary);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: linear-gradient(135deg, var(--color-bg-gradient-start) 0%, var(--color-bg-gradient-end) 100%);
    background-attachment: fixed;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.site-header {
    background: rgba(7, 23, 39, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text);
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
}

.main-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

/* Dropdown Navigation */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0;
    font-family: var(--font-family);
}

.dropdown-arrow {
    font-size: 0.7rem;
    transition: transform 0.2s;
}

.nav-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(7, 23, 39, 0.98);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--spacing-sm) 0;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    margin-top: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    z-index: 200;
}

.nav-dropdown.open .nav-dropdown-menu,
.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.nav-dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: background 0.2s, color 0.2s;
}

.nav-dropdown-item:hover {
    background: rgba(113, 227, 244, 0.1);
    color: var(--color-primary);
}

/* Main */
.site-main {
    flex: 1;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    text-align: center;
    background: transparent;
}

.hero-logo {
    max-width: 300px;
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    font-weight: 400;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.hero-badges img {
    height: 24px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius);
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-primary);
    color: #051219;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(113, 227, 244, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: rgba(10, 31, 46, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    transition: all 0.2s;
}

.feature-card:hover {
    box-shadow: 0 4px 20px rgba(113, 227, 244, 0.15);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.feature-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
}

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

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-desc {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Code Blocks */
.code-section {
    padding: var(--spacing-xl) 0;
    background: rgba(5, 18, 25, 0.5);
}

pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
}

code {
    font-family: var(--font-mono);
}

p code, li code {
    background: var(--color-code-bg);
    color: var(--color-primary);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    font-size: 0.95rem;
}

th, td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    background: rgba(10, 31, 46, 0.8);
    font-weight: 600;
}

tr:hover {
    background: rgba(10, 31, 46, 0.5);
}

/* Page Content */
.page-content {
    padding: var(--spacing-xl) 0;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.page h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    letter-spacing: -0.01em;
}

.page h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.page p {
    margin-bottom: var(--spacing-md);
}

.page ul, .page ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.page li {
    margin-bottom: var(--spacing-sm);
}

.page a {
    color: var(--color-primary);
    text-decoration: none;
}

.page a:hover {
    text-decoration: underline;
}

/* Algorithm Tables */
.algorithms-section {
    padding: var(--spacing-xl) 0;
}

.algorithm-category {
    margin-bottom: var(--spacing-xl);
}

.algorithm-category h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

/* Performance Section */
.performance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.perf-card {
    background: rgba(10, 31, 46, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--spacing-md);
    text-align: center;
}

.perf-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-secondary);
}

.perf-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Footer */
.site-footer {
    background: rgba(5, 18, 25, 0.8);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.site-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.site-footer p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .main-nav {
        gap: var(--spacing-md);
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-dropdown-menu {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }

    /* Disable hover on touch devices, require click */
    .nav-dropdown:hover .nav-dropdown-menu {
        opacity: 0;
        visibility: hidden;
    }

    .nav-dropdown.open .nav-dropdown-menu {
        opacity: 1;
        visibility: visible;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .site-footer .container {
        flex-direction: column;
        text-align: center;
    }
}