:root {
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-strong: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.12);
    --border-strong: rgba(255, 255, 255, 0.2);
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --header-border: rgba(255, 255, 255, 0.08);
    --section-divider: rgba(255, 255, 255, 0.05);
}

.light-mode {
    --bg-card: #ffffff;
    --bg-card-strong: #ffffff;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.15);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --header-border: rgba(0, 0, 0, 0.08);
    --section-divider: rgba(0, 0, 0, 0.03);
}

.section-divider { border-top: 1px solid var(--section-divider); margin: 4rem 0; }
.bg-subtle { background: var(--section-divider); }

.light-mode .text-white:not(.bg-blue-600 .text-white, .bg-indigo-600 .text-white, .bg-gradient-to-r .text-white, .bg-slate-800 .text-white, .bg-slate-900 .text-white) { color: #0f172a; }
.light-mode .text-gray-200 { color: #334155; }
.light-mode .text-gray-300 { color: #475569; }
.light-mode .text-gray-400 { color: #64748b; }
.light-mode .glass { background: rgba(255, 255, 255, 0.8); border-color: rgba(0, 0, 0, 0.05); box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05); }
.light-mode .glass-strong { background: #ffffff; border-color: rgba(0, 0, 0, 0.08); box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1); }
.light-mode .bg-slate-900\/40 { background: rgba(0, 0, 0, 0.03); }

body { font-family: 'Inter', sans-serif; transition: background-color 0.3s ease, color 0.3s ease; }
.glass { background: var(--bg-card); backdrop-filter: blur(10px); border: 1px solid var(--border-color); }
.glass-card { background: var(--bg-card); backdrop-filter: blur(10px); border: 1px solid var(--border-color); }
.glass-strong { background: var(--bg-card-strong); backdrop-filter: blur(20px); border: 1px solid var(--border-color); }

.gradient-text { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.gradient-blue, .bg-indigo-600 { background: linear-gradient(135deg, var(--primary), var(--secondary)) !important; }
.hover\:bg-indigo-700:hover { filter: brightness(1.2); }
.text-indigo-500, .text-indigo-600, .group-hover\:text-indigo-500:hover { color: var(--primary) !important; }
.border-indigo-500, .focus\:border-indigo-500:focus { border-color: var(--primary) !important; }
.bg-indigo-500\/20, .bg-indigo-500\/10 { background-color: color-mix(in srgb, var(--primary), transparent 80%) !important; }
.bg-indigo-500 { background-color: var(--primary) !important; }

.gradient-purple { background: linear-gradient(135deg, var(--secondary), var(--primary)); }
.gradient-pink { background: linear-gradient(135deg, #ec4899, #be185d); }
.gradient-emerald { background: linear-gradient(135deg, #10b981, #059669); }

.card-hover { transition: all 0.3s ease; }
.card-hover:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.1); }

.hero-gradient { background: linear-gradient(135deg, var(--bg-main) 0%, color-mix(in srgb, var(--primary), transparent 80%) 50%, var(--bg-main) 100%); }
.light-mode .hero-gradient { background: linear-gradient(135deg, var(--bg-main) 0%, color-mix(in srgb, var(--primary), transparent 90%) 100%); }

footer { background-color: var(--footer-bg) !important; }
header { background-color: var(--header-bg) !important; }

.btn-product { background-color: var(--btn-product-bg) !important; color: var(--btn-product-text) !important; }
.btn-quiz { background-color: var(--btn-quiz-bg) !important; color: var(--btn-quiz-text) !important; }
.btn-main { background-color: var(--btn-main-bg) !important; color: var(--btn-main-text) !important; }
.btn-read-notes { background-color: var(--btn-read-notes-bg) !important; color: var(--btn-read-notes-text) !important; }
.btn-read-mcqs { background-color: var(--btn-read-mcqs-bg) !important; color: var(--btn-read-mcqs-text) !important; }
.btn-download { background-color: var(--btn-download-bg) !important; color: var(--btn-download-text) !important; }
.btn-video { background-color: var(--btn-video-bg) !important; color: var(--btn-video-text) !important; }
.btn-main:hover, .btn-quiz:hover, .btn-product:hover, .btn-read-notes:hover, .btn-read-mcqs:hover, .btn-download:hover, .btn-video:hover { filter: brightness(1.1); transform: translateY(-1px); }

.float-animation { animation: float 6s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0px); } 50% { transform: translateY(-10px); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.fade-in-up { animation: fadeInUp 0.6s ease forwards; }
.search-dropdown { max-height: 400px; overflow-y: auto; }
.page-bg { background: var(--bg-main); min-height: 100vh; }
[x-cloak] { display: none !important; }

/* Grand Prose AI System */
.prose p, .prose h1, .prose h2, .prose h3, .prose h4, .prose h5, .prose h6, .prose li {
    overflow-wrap: break-word !important;
    word-wrap: break-word !important;
    word-break: break-word !important;
}

.prose h1 {
    font-size: 2rem !important;
    font-weight: 900 !important;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2 !important;
    margin-bottom: 1.5rem !important;
    margin-top: 0 !important;
    letter-spacing: -0.02em;
}

.prose h2 {
    font-size: 1.5rem !important;
    font-weight: 800 !important;
    color: #a5b4fc !important;
    -webkit-text-fill-color: #a5b4fc !important;
    margin-top: 2.5rem !important;
    margin-bottom: 1rem !important;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid rgba(99, 102, 241, 0.15);
    position: relative;
    letter-spacing: -0.01em;
}
.prose h2::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

.prose h3 {
    font-size: 1.2rem !important;
    font-weight: 700 !important;
    color: #c4b5fd !important;
    -webkit-text-fill-color: #c4b5fd !important;
    margin-top: 2rem !important;
    margin-bottom: 0.75rem !important;
    letter-spacing: -0.01em;
}

.prose p {
    color: #cbd5e1 !important;
    font-size: 0.95rem !important;
    line-height: 1.8 !important;
    margin-bottom: 1.25rem !important;
}

.prose b, .prose strong {
    color: #e0e7ff !important;
    font-weight: 800 !important;
    background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(168,85,247,0.12));
    padding: 1px 6px;
    border-radius: 4px;
    border-bottom: 2px solid rgba(99, 102, 241, 0.4);
}

.prose ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.prose thead th {
    background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(168,85,247,0.1)) !important;
    color: #a5b4fc !important;
    font-weight: 800 !important;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem !important;
}

/* Premium Responsive UI Enhancements */
@media (max-width: 768px) {
    .container, .max-w-7xl { padding-left: 1.25rem !important; padding-right: 1.25rem !important; }
    h1 { font-size: 1.875rem !important; line-height: 1.1 !important; }
    h2 { font-size: 1.25rem !important; }
    .glass-strong { border-radius: 1.5rem !important; padding: 1.25rem !important; }
    .card-hover:hover { transform: translateY(-4px) !important; }
    
    /* Thumb-friendly interactions */
    a, button { -webkit-tap-highlight-color: transparent; }
    .btn-premium { width: 100% !important; justify-content: center !important; }
    
    /* Better Grid Spacing */
    .grid-cols-2 { gap: 0.75rem !important; }
    
    /* Mobile-specific visibility */
    .md-hidden-only { display: none !important; }
}

/* Glassmorphism Logic */
.glass-strong {
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}
.light-mode .glass-strong {
    background: rgba(255, 255, 255, 0.8);
}

.prose .faq-item, .faq-item {
    background: rgba(15, 23, 42, 0.4) !important;
    backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 1.5rem;
}

#scroll-progress { position: fixed; top: 0; left: 0; height: 3px; width: 100%; background: linear-gradient(90deg, var(--primary), var(--secondary)); z-index: 10000; transform: scaleX(0); transform-origin: left; will-change: transform; pointer-events: none; }
#page-loader { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center; backdrop-filter: blur(4px); background: rgba(15, 23, 42, 0.8); transition: opacity 0.3s ease-in-out; }
#page-loader.hide { opacity: 0; pointer-events: none; }

/* ═══════════════════════════════════════════════════════════════
   SKELETON LOADING SYSTEM (WOW IMPACT)
   ═══════════════════════════════════════════════════════════════ */
.skeleton {
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.03) 25%, 
        rgba(255, 255, 255, 0.08) 50%, 
        rgba(255, 255, 255, 0.03) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite linear;
    border-radius: 0.5rem;
}

.light-mode .skeleton {
    background: linear-gradient(90deg, 
        rgba(0, 0, 0, 0.05) 25%, 
        rgba(0, 0, 0, 0.1) 50%, 
        rgba(0, 0, 0, 0.05) 75%
    );
    background-size: 200% 100%;
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text { height: 1rem; width: 100%; margin-bottom: 0.5rem; }
.skeleton-title { height: 2rem; width: 60%; margin-bottom: 1rem; }
.skeleton-card { aspect-ratio: 3/4; border-radius: 1.5rem; }
.skeleton-circle { width: 3rem; height: 3rem; border-radius: 50%; }

.skeleton-container.skeleton-active {
    position: relative;
    overflow: hidden;
}
.skeleton-container.skeleton-active::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 10;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.03) 25%, 
        rgba(255, 255, 255, 0.08) 50%, 
        rgba(255, 255, 255, 0.03) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite linear;
}
.light-mode .skeleton-container.skeleton-active::before {
    background: linear-gradient(90deg, 
        rgba(0, 0, 0, 0.05) 25%, 
        rgba(0, 0, 0, 0.1) 50%, 
        rgba(0, 0, 0, 0.05) 75%
    );
    background-size: 200% 100%;
}


/* Image Fade-in for Lazy Loading */
img { opacity: 0; transition: opacity 0.5s ease; }
img.loaded { opacity: 1; }
img[loading="lazy"] { background: rgba(255,255,255,0.03); }
.light-mode img[loading="lazy"] { background: rgba(0,0,0,0.03); }