/* ============================================================
   ROOT VARIABLES - Dark Theme
   ============================================================ */
:root {
    /* Primary Colors */
    --color-primary: #F0C13D;
    --color-primary-dark: #d4a832;
    --color-primary-light: #f5d67a;
    --color-primary-hover: #e0b032;
    
    /* Background Colors */
    --bg-primary: #0a0e14;
    --bg-secondary: #141a21;
    --bg-tertiary: #1a222b;
    --bg-card: #1a222b;
    --bg-card-hover: #24303d;
    --bg-dark: #060a0e;
    --bg-light: #2a3645;
    --bg-overlay: rgba(0, 0, 0, 0.7);
    --bg-highlight: rgba(240, 193, 61, 0.08);
    
    /* Text Colors */
    --text-primary: #e8edf2;
    --text-secondary: #c8d0d8;
    --text-muted: #8899aa;
    --text-dark: #e8edf2;
    --text-light: #667788;
    
    /* Border Colors */
    --border-light: #2a3645;
    --border-gray: #24303d;
    --border-dark: #1a222b;
    --border-primary: #F0C13D;
    
    /* Shadow Colors */
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.5);
    --shadow-dark: rgba(0, 0, 0, 0.7);
    --shadow-glow: rgba(240, 193, 61, 0.15);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 2.5rem;
    --space-3xl: 3rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: clamp(0.6rem, 0.8vw, 0.75rem);
    --font-size-sm: clamp(0.7rem, 1vw, 0.85rem);
    --font-size-base: clamp(0.85rem, 1.2vw, 1rem);
    --font-size-md: clamp(1rem, 1.4vw, 1.15rem);
    --font-size-lg: clamp(1.2rem, 1.8vw, 1.4rem);
    --font-size-xl: clamp(1.5rem, 2.5vw, 2rem);
    --font-size-2xl: clamp(2rem, 3.5vw, 3rem);
    --font-size-3xl: clamp(2.5rem, 4.5vw, 4rem);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-medium: 0.25s ease;
    --transition-slow: 0.35s ease;
    --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}


/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

/* ============================================================
   SELECTION
   ============================================================ */
::selection {
    background: var(--color-primary);
    color: var(--bg-primary);
}

::-moz-selection {
    background: var(--color-primary);
    color: var(--bg-primary);
}

/* ============================================================
   BANNER - Dark Theme
   ============================================================ */
.sd-banner {
    position: relative;
    width: 100%;
    height: clamp(300px, 45vh, 550px);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-primary);
}

.sd-banner img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.sd-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 100%);
    z-index: 1;
}

.sd-banner-content {
    position: relative;
    z-index: 2;
    padding: 20px;
    max-width: 900px;
    animation: fadeInUp 0.8s ease forwards;
}

.sd-banner-content h1 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: 10px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.sd-banner-content h1 .highlight {
    color: var(--color-primary);
}

.sd-banner-content p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    color: var(--text-secondary);
}

.sd-banner-content .sd-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    padding: 6px 20px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    margin-top: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--color-primary);
}

.sd-banner-content .sd-badge i {
    margin-right: 6px;
}

/* ============================================================
   CONTAINER
   ============================================================ */
.sd-container {
    max-width: 1300px !important;
    width: 100% !important;
    margin: -40px auto 40px !important;
    padding: 0 20px !important;
    position: relative;
    z-index: 3;
    box-sizing: border-box !important;
}

/* ============================================================
   SECTION TITLE - Dark Theme
   ============================================================ */
.sd-section-title {
    text-align: center;
    margin-bottom: 35px;
}

.sd-section-title h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

.sd-section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
}

.sd-section-title p {
    font-size: var(--font-size-md);
    color: var(--text-muted);
    margin-top: 16px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================================
   INTRO CARD - Dark Theme
   ============================================================ */
.sd-intro-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 40px 45px;
    box-shadow: 0 4px 20px var(--shadow-light);
    margin-bottom: 40px;
    border: 1px solid var(--border-light);
    transition: all var(--transition-medium);
}

.sd-intro-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 30px var(--shadow-medium), 0 0 30px var(--shadow-glow);
}

.sd-intro-card h2 {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    margin-bottom: 12px;
}

.sd-intro-card p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.8;
}

.sd-intro-card .sd-highlight-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 25px;
}

.sd-intro-card .sd-highlight-item {
    text-align: center;
    padding: 18px 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: all var(--transition-medium);
}

.sd-intro-card .sd-highlight-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--shadow-light);
}

.sd-intro-card .sd-highlight-item i {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    margin-bottom: 6px;
}

.sd-intro-card .sd-highlight-item h4 {
    font-size: var(--font-size-md);
    color: var(--text-primary);
}

.sd-intro-card .sd-highlight-item p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: 2px;
}

/* ============================================================
   SECTION CARDS - Dark Theme
   ============================================================ */
.sd-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 35px 40px;
    box-shadow: 0 4px 20px var(--shadow-light);
    margin-bottom: 30px;
    border: 1px solid var(--border-light);
    transition: all var(--transition-medium);
}

.sd-section:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 30px var(--shadow-medium), 0 0 30px var(--shadow-glow);
}

.sd-section h3 {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sd-section h3 i {
    color: var(--color-primary);
}

.sd-section p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.8;
}

.sd-section ul {
    list-style: none;
    padding: 0;
    margin: 12px 0;
}

.sd-section ul li {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    padding: 6px 0;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    border-bottom: 1px solid var(--border-light);
    transition: color var(--transition-fast);
}

.sd-section ul li:hover {
    color: var(--text-primary);
}

.sd-section ul li i {
    color: var(--color-primary);
    margin-top: 4px;
    flex-shrink: 0;
}

/* ============================================================
   UNIVERSITY CARDS - Dark Theme
   ============================================================ */
.sd-university-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 10px;
}

.sd-university-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all var(--transition-medium);
}

.sd-university-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px var(--shadow-medium), 0 0 30px var(--shadow-glow);
    border-color: var(--color-primary);
}

.sd-university-card img {
    width: 100%;
    height: clamp(140px, 18vw, 200px);
    object-fit: cover;
    display: block;
}

.sd-university-card .sd-uni-body {
    padding: 16px 18px 20px;
}

.sd-university-card .sd-uni-body h4 {
    font-size: var(--font-size-md);
    color: var(--text-primary);
    margin-bottom: 4px;
}

.sd-university-card .sd-uni-body .sd-uni-location {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: 8px;
}

.sd-university-card .sd-uni-body .sd-uni-location i {
    color: var(--color-primary);
    margin-right: 4px;
}

.sd-university-card .sd-uni-body p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.sd-university-card .sd-uni-body .sd-uni-tag {
    display: inline-block;
    background: var(--bg-highlight);
    color: var(--color-primary);
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 12px;
    border-radius: var(--radius-full);
    margin-right: 4px;
    border: 1px solid rgba(240, 193, 61, 0.15);
}

/* ============================================================
   COST TABLE - Dark Theme
   ============================================================ */
.sd-cost-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    font-size: var(--font-size-base);
}

.sd-cost-table th {
    background: var(--color-primary);
    color: var(--bg-primary);
    padding: 12px 16px;
    text-align: left;
    font-weight: 700;
}

.sd-cost-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.sd-cost-table tr:hover td {
    background: var(--bg-tertiary);
}

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

.sd-cost-table tr:last-child {
    background: var(--bg-tertiary);
}

.sd-cost-table tr:last-child td {
    color: var(--text-primary);
}

/* ============================================================
   SCHOLARSHIP CARDS - Dark Theme
   ============================================================ */
.sd-scholarship-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.sd-scholarship-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: 20px 22px;
    border-left: 4px solid var(--color-primary);
    transition: all var(--transition-medium);
}

.sd-scholarship-card:hover {
    background: var(--bg-card-hover);
    transform: translateX(4px);
    box-shadow: 0 4px 20px var(--shadow-light);
}

.sd-scholarship-card h4 {
    font-size: var(--font-size-md);
    color: var(--text-primary);
    margin-bottom: 4px;
}

.sd-scholarship-card .sd-scholar-amount {
    font-size: var(--font-size-base);
    color: var(--color-primary);
    font-weight: 700;
}

.sd-scholarship-card p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: 4px;
}

/* ============================================================
   TIP BOX - Dark Theme
   ============================================================ */
.sd-tip-box {
    margin-top: 10px;
    padding: 12px 18px;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    background: var(--bg-highlight);
}

.sd-tip-box strong {
    color: var(--color-primary);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sd-intro-card {
    animation: fadeInUp 0.6s ease forwards;
}

.sd-section {
    animation: fadeInUp 0.6s ease forwards;
}

.sd-section:nth-child(1) { animation-delay: 0.05s; }
.sd-section:nth-child(2) { animation-delay: 0.1s; }
.sd-section:nth-child(3) { animation-delay: 0.15s; }
.sd-section:nth-child(4) { animation-delay: 0.2s; }
.sd-section:nth-child(5) { animation-delay: 0.25s; }
.sd-section:nth-child(6) { animation-delay: 0.3s; }

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

@media (max-width: 1024px) {
    .sd-intro-card .sd-highlight-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sd-university-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sd-container {
        padding: 0 16px !important;
        margin: -30px auto 30px !important;
    }

    .sd-section {
        padding: 28px 30px;
    }
}

@media (max-width: 820px) {
    .sd-banner {
        height: clamp(250px, 35vh, 380px);
    }

    .sd-university-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .sd-scholarship-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .sd-banner {
        height: clamp(200px, 30vh, 300px);
    }

    .sd-banner-content h1 {
        font-size: var(--font-size-xl);
    }

    .sd-container {
        padding: 0 10px !important;
        margin: -20px auto 20px !important;
    }

    .sd-section {
        padding: 20px 18px;
        border-radius: var(--radius-lg);
        margin-bottom: 20px;
    }

    .sd-intro-card {
        padding: 24px 18px;
        border-radius: var(--radius-lg);
        margin-bottom: 25px;
    }

    .sd-intro-card .sd-highlight-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .sd-university-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .sd-university-card img {
        height: clamp(160px, 35vw, 200px);
    }

    .sd-cost-table {
        font-size: var(--font-size-xs);
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .sd-cost-table th,
    .sd-cost-table td {
        padding: 8px 12px;
    }

    .sd-section h3 {
        font-size: var(--font-size-md);
    }

    .sd-section p,
    .sd-section ul li {
        font-size: var(--font-size-sm);
    }

    .sd-scholarship-card {
        padding: 16px 18px;
    }
}

@media (max-width: 420px) {
    .sd-banner {
        height: clamp(160px, 25vh, 220px);
    }

    .sd-banner-content h1 {
        font-size: var(--font-size-lg);
    }

    .sd-banner-content p {
        font-size: var(--font-size-sm);
    }

    .sd-container {
        padding: 0 6px !important;
    }

    .sd-section {
        padding: 16px 14px;
        border-radius: var(--radius-md);
        margin-bottom: 14px;
    }

    .sd-intro-card {
        padding: 18px 14px;
    }

    .sd-intro-card .sd-highlight-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .sd-intro-card .sd-highlight-item {
        padding: 12px 8px;
    }

    .sd-university-card .sd-uni-body {
        padding: 12px 14px 16px;
    }

    .sd-section h3 {
        font-size: var(--font-size-sm);
    }

    .sd-section p,
    .sd-section ul li {
        font-size: var(--font-size-xs);
    }

    .sd-scholarship-card h4 {
        font-size: var(--font-size-sm);
    }
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--text-muted); }

.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }

.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: 0 2px 8px var(--shadow-light); }
.shadow-md { box-shadow: 0 4px 20px var(--shadow-medium); }
.shadow-glow { box-shadow: 0 0 30px var(--shadow-glow); }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }

.sd-mt-20 { margin-top: var(--space-xl); }
.sd-mb-10 { margin-bottom: var(--space-sm); }