:root {
    /* Professional Color Palette (Slate & Indigo based) */
    --primary: #6366f1; /* Indigo 500 */
    --primary-hover: #4f46e5; /* Indigo 600 */
    --secondary: #0ea5e9; /* Sky 500 */
    --dark: #0f172a; /* Slate 900 */
    --dark-muted: #1e293b; /* Slate 800 */
    --light: #f8fafc; /* Slate 50 */
    --gray: #64748b; /* Slate 500 */
    --border: #e2e8f0; /* Slate 200 */
    --yellow: #f59e0b; /* Amber 500 */
    
    /* Branding specific (inspired by original logo colors) */
    --school-blue: #00BFFF;
    --school-green: #2ECC71;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 0.75rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--light);
    color: var(--dark-muted);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

main {
    flex: 1;
}

/* ===============================
   NAVBAR STYLES
   =============================== */
.navbar-custom {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 3px solid var(--yellow);
    padding: 0.75rem 0;
    transition: var(--transition);
}

.navbar-brand img {
    transition: var(--transition);
}

.navbar-brand:hover img {
    transform: scale(1.05);
}

.navbar-custom .nav-link {
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8) !important;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.navbar-custom .nav-link:hover, 
.navbar-custom .nav-link.active {
    color: #ffffff !important;
    background: rgba(255, 255, 255, 0.1);
}

/* ===============================
   HERO SECTION (Updated for professionalism)
   =============================== */
.hero-section {
    position: relative;
    padding: 120px 0;
    overflow: hidden;
    background-color: var(--dark);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.8) 0%, rgba(15, 23, 42, 0.4) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #cbd5e1;
    max-width: 600px;
    margin-bottom: 2.5rem;
}

/* ===============================
   CARDS & BOXES
   =============================== */
.info-box {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
    height: 100%;
}

.info-box:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.card {
    border: none;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
    background: #fff;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    background-color: var(--dark);
    color: white;
    border: none;
    padding: 1.25rem;
}

/* ===============================
   BUTTONS
   =============================== */
.btn {
    padding: 0.625rem 1.5rem;
    font-weight: 600;
    border-radius: 9999px;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-warning {
    background-color: var(--yellow);
    border-color: var(--yellow);
    color: var(--dark);
}

.btn-warning:hover {
    background-color: #d97706;
    border-color: #d97706;
    color: #fff;
}

/* ===============================
   FOOTER
   =============================== */
.footer-section {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
}

.footer-link {
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--yellow) !important;
    transform: translateX(5px);
}

/* ===============================
   RESPONSIVE & UTILS
   =============================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
}

.section-title {
    position: relative;
    padding-bottom: 1rem;
    margin-bottom: 2rem;
    font-weight: 700;
    color: var(--dark);
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 60px;
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light);
}

::-webkit-scrollbar-thumb {
    background: var(--gray);
    border-radius: 10px;
}

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