:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-body: #f3f4f6;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
    --glass-blur: blur(12px);
    --card-radius: 16px;
    --font-family: 'Noto Sans', sans-serif;
    --input-bg: rgba(255, 255, 255, 0.9);
    --border-color: #e5e7eb;
}

[data-theme="dark"] {
    --primary-color: #3b82f6;
    --primary-hover: #60a5fa;
    --bg-body: #0f172a;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.75);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --input-bg: rgba(30, 41, 59, 0.9);
    --border-color: #374151;
}

* { box-sizing: border-box; }

body {
    font-family: var(--font-family);
    background: var(--bg-body);
    /* Subtle gradient background for glass effect */
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    margin: 0;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
}

[data-theme="light"] body {
    background-image: 
        radial-gradient(at 40% 20%, hsla(28,100%,74%,1) 0px, transparent 50%),
        radial-gradient(at 80% 0%, hsla(189,100%,56%,1) 0px, transparent 50%),
        radial-gradient(at 0% 50%, hsla(355,100%,93%,1) 0px, transparent 50%);
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.page-content { flex: 1; padding-top: 30px; padding-bottom: 80px; }

/* Glassmorphism Utilities */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--card-radius);
}

/* Header */
.main-header {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 15px 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Navigation */
.main-nav { display: flex; align-items: center; gap: 20px; }
.nav-list {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

.nav-list a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s;
    padding: 8px 12px;
    border-radius: 8px;
}

.nav-list a:hover, .nav-list a.active {
    background: rgba(var(--primary-color), 0.1);
    color: var(--primary-color);
}

/* Theme Toggle */
.theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.theme-toggle:hover { transform: scale(1.1); }

/* Footer */
.main-footer {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-top: 1px solid var(--glass-border);
    padding: 40px 0 20px;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-col h3, .footer-col h4 { margin-top: 0; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { text-decoration: none; color: var(--text-muted); transition: color 0.2s; }
.footer-col a:hover { color: var(--primary-color); }

.footer-social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    margin-right: 10px;
    margin-bottom: 10px;
    transition: transform 0.2s, box-shadow 0.2s;
    color: white !important; /* Force white text */
    font-size: 0.9rem;
}
.btn-whatsapp { background: linear-gradient(45deg, #25D366, #128C7E); box-shadow: 0 4px 10px rgba(37, 211, 102, 0.3); }
.btn-telegram { background: linear-gradient(45deg, #0088cc, #005f8f); box-shadow: 0 4px 10px rgba(0, 136, 204, 0.3); }
.footer-social-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 15px rgba(0,0,0,0.2); }

.footer-bottom { text-align: center; margin-top: 30px; color: var(--text-muted); font-size: 0.9rem; border-top: 1px solid var(--glass-border); padding-top: 20px; }

/* Components */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-size: 0.9rem;
}
.btn-primary { background: var(--primary-color); color: #fff; box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3); }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-outline { border: 2px solid var(--primary-color); color: var(--primary-color); background: transparent; }
.btn-outline:hover { background: var(--primary-color); color: #fff; }
.btn-block { display: block; width: 100%; text-align: center; }

/* Filter Bar */
.filter-bar {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    padding: 20px;
    border-radius: var(--card-radius);
    box-shadow: var(--glass-shadow);
    margin-bottom: 30px;
    border: 1px solid var(--glass-border);
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

.filter-select {
    width: 100%;
    height: 46px;
    padding: 0 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}
.filter-select:focus { border-color: var(--primary-color); }

/* Document Cards */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.doc-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--card-radius);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.doc-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.doc-thumb {
    height: 150px;
    background-color: rgba(0,0,0,0.05);
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.doc-thumb i { font-size: 3rem; color: var(--text-muted); opacity: 0.5; }

.doc-body { padding: 15px; flex: 1; display: flex; flex-direction: column; }
.doc-meta { font-size: 0.75rem; color: var(--primary-color); font-weight: 700; text-transform: uppercase; margin-bottom: 5px; }
.doc-title { 
    font-size: 1rem; 
    font-weight: 600; 
    margin: 0 0 10px 0; 
    color: var(--text-main); 
    line-height: 1.4; 
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.doc-stat { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 5px; }
.doc-footer { margin-top: 15px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--glass-border); padding-top: 10px; }

/* Search Box (Home/Short Notes) */
.search-box-large {
    display: flex;
    max-width: 600px;
    margin: 0 auto 40px;
    gap: 10px;
}
.search-input {
    flex: 1;
    padding: 12px 20px;
    font-size: 1.1rem;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    background: var(--input-bg);
    color: var(--text-main);
}

/* Mobile Bottom Nav (Hidden on Desktop) */
.mobile-bottom-nav { display: none; }
.mobile-menu-btn { display: none; }

/* Responsive Adjustments */
@media (max-width: 768px) {
    /* Grid: 2 Cards per row on mobile */
    .results-grid {
        grid-template-columns: repeat(2, 1fr); 
        gap: 10px;
    }
    
    .filter-grid { grid-template-columns: 1fr; }
    
    .doc-thumb { height: 100px; }
    .doc-body { padding: 10px; }
    .doc-title { font-size: 0.85rem; margin-bottom: 5px; }
    .doc-stat { font-size: 0.7rem; }
    .btn { padding: 6px 12px; font-size: 0.8rem; }
    .doc-footer .btn-outline { padding: 4px 10px; }

    /* Hide Top Nav Links */
    .nav-list { display: none; }
    
    /* Show Bottom Nav */
    .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: var(--glass-bg);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        border-top: 1px solid var(--glass-border);
        justify-content: space-around;
        padding: 8px 0;
        z-index: 1000;
        box-shadow: 0 -5px 15px rgba(0,0,0,0.1);
    }

    .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-decoration: none;
        color: var(--text-muted);
        font-size: 0.7rem;
        padding: 5px;
    }
    
    .mobile-nav-item i { font-size: 1.4rem; margin-bottom: 3px; }
    .mobile-nav-item.active { color: var(--primary-color); font-weight: 600; }

    /* Page padding for bottom nav */
    .page-content { padding-bottom: 90px; }
    
    /* Footer stacking */
    .footer-content { grid-template-columns: 1fr; text-align: center; }
    .footer-social-btn { display: flex; width: 100%; margin-bottom: 10px; }
}

.results-bar{
  margin: 16px 0 10px;
  color: rgba(255,255,255,.75);
  font-weight: 600;
}

.loadmore-wrap{
  display:flex;
  justify-content:center;
  margin: 24px 0 40px;
}

.btn-loadmore{
  background: rgba(40,120,255,.15);
  border: 1px solid rgba(60,150,255,.55);
  color: #8bc4ff;
  padding: 10px 18px;
  border-radius: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, border-color .2s ease;
}
.btn-loadmore:hover{
  transform: translateY(-1px);
  background: rgba(40,120,255,.25);
  border-color: rgba(60,150,255,.8);
}
.btn-loadmore:disabled{
  opacity: .6;
  cursor: not-allowed;
  transform: none;
}