/* 
    Saka-NLP Global Styles 🏛️
    Design System for v0.2.4+
    Focus: Maintenance, Premium Aesthetics, and Consistency.
*/

:root {
    /* Design Tokens */
    --bg: #0d0d0f;
    --surface: #16161a;
    --surface-glass: rgba(22, 22, 26, 0.7);
    --surface-hover: #27272a;
    --primary: #a82020;
    --primary-gradient: linear-gradient(135deg, #a82020 0%, #701010 100%);
    --primary-light: #d43f3f;
    --accent: #cfb53b;
    --accent-gradient: linear-gradient(135deg, #cfb53b 0%, #a68a1f 100%);
    --text: #f0f0f5;
    --text-dim: #a0a0b5;
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    /* Typography */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Playfair Display', serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Layout */
    --container-max: 1100px;
    --sidebar-width: 280px;
    --radius-lg: 24px;
    --radius-md: 12px;
    --radius-sm: 8px;

    /* Colors */
    --code-bg: #09090b;
    --glass-blur: blur(12px);
}

[data-theme='light'] {
    --bg: #fafafa;
    --surface: #ffffff;
    --surface-glass: rgba(255, 255, 255, 0.8);
    --surface-hover: #f4f4f5;
    --primary: #a82020;
    --primary-gradient: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
    --accent: #b45309;
    --text: #18181b;
    --text-dim: #52525b;
    --border: #e4e4e7;
    --border-hover: #d1d1d6;
    --code-bg: #111111;
}

/* --- Resets & Base --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- Components: Buttons --- */
.btn {
    padding: 0.9rem 2.2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 10px 25px -5px rgba(168, 32, 32, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px -5px rgba(168, 32, 32, 0.5);
}

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text);
    background: var(--surface-glass);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.btn-outline:hover {
    background: var(--surface-hover);
    border-color: var(--accent);
    transform: translateY(-3px);
}

.btn-accent {
    background: var(--accent-gradient);
    color: #1a1a1a;
    box-shadow: 0 10px 25px -5px rgba(207, 181, 59, 0.3);
}

.btn-accent:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px -5px rgba(207, 181, 59, 0.5);
}

/* --- Components: Code Blocks --- */
.code-container {
    background: var(--code-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.5);
    margin: 1.5rem 0;
}

.code-header {
    background: rgba(255, 255, 255, 0.03);
    padding: 0.6rem 1.2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.code-lang {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 0.3rem 0.7rem;
    border-radius: 6px;
    font-size: 0.7rem;
    cursor: pointer;
}

.copy-btn:hover {
    color: var(--text);
    border-color: var(--text-dim);
}

.code-block {
    padding: 1.2rem;
    margin: 0;
    overflow-x: auto;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.7;
    color: #d1d1e0;
}

/* Syntax Highlighting */
.c-kw {
    color: #f27c7c;
}

.c-st {
    color: #e6db74;
}

.c-fn {
    color: #66d9ef;
}

.c-cm {
    color: #75715e;
    font-style: italic;
}

/* --- Theme Toggle --- */
#theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 2rem;
    z-index: 1000;
    padding: 0.6rem 1rem;
}

/* --- Responsive Helpers --- */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    #theme-toggle {
        top: 1rem;
        right: 1rem;
    }
}

/* --- Citation Section --- */
.citation-section {
    background-color: var(--surface);
    padding: 4rem 3rem;
    border-radius: var(--radius-md);
    margin-bottom: 4rem;
    border: 1px solid var(--border);
}

.citation-section .section-header {
    margin-bottom: 2rem;
}

.citation-section h2 {
    font-size: 2rem !important;
    color: var(--accent) !important;
    text-align: left !important;
}

.citation-section p {
    margin-bottom: 1.5rem;
    color: var(--text-dim);
    text-align: left !important;
}

.citation-box-apa {
    background-color: var(--bg);
    padding: 1.2rem;
    border-radius: var(--radius-sm);
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary);
    font-size: 0.95rem;
    color: #d1d5db;
    font-style: normal;
    text-align: left;
}

.citation-note {
    margin-bottom: 2rem !important;
    font-size: 0.9rem !important;
    font-style: italic;
    opacity: 0.8;
    text-align: left;
}

.bibtex-container {
    margin-bottom: 0 !important;
}

/* --- References & Footer --- */
.references {
    margin-bottom: 4rem;
}

.ref-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.ref-list li {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: 0.95rem;
    transition: border-color 0.3s;
}

.ref-list li:hover {
    border-color: var(--border-hover);
}

.ref-list li strong {
    color: var(--accent);
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

footer {
    padding: 5rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1rem;
    display: inline-block;
}

.footer-credits {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.footer-credits a {
    color: var(--accent);
    text-decoration: none;
}