/* =========================================================
   Kalpatharu School & College of Nursing - Responsive UI/UX
   Medical Theme: Deep Ocean Navy (#0a3663), Medical Teal (#00a896)
   ========================================================= */

:root {
    --primary-navy: #0a3663;
    --primary-navy-hover: #072748;
    --medical-teal: #00a896;
    --medical-teal-hover: #028073;
    --accent-gold: #f59e0b;
    --light-bg: #f8fafc;
    --card-border: #e2e8f0;
    --text-dark: #0f172a;
    --text-muted: #64748b;
    --glass-bg: rgba(255, 255, 255, 0.92);
    --radius-lg: 20px;
    --radius-md: 12px;
    --shadow-sm: 0 4px 12px rgba(10, 54, 99, 0.05);
    --shadow-md: 0 10px 30px rgba(10, 54, 99, 0.1);
    --shadow-hover: 0 18px 40px rgba(10, 54, 99, 0.15);
    --gradient-hero: linear-gradient(135deg, rgba(10, 54, 99, 0.9) 0%, rgba(0, 168, 150, 0.85) 100%);
    --gradient-btn: linear-gradient(135deg, #0a3663 0%, #00a896 100%);
}

/* Dark Mode Tokens */
body.dark-mode {
    --primary-navy: #1e3a8a;
    --light-bg: #0b1329;
    --card-border: #1e293b;
    --text-dark: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(15, 23, 42, 0.95);
    background-color: #0b1329;
    color: #f8fafc;
}

html, body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-dark);
    background-color: #ffffff;
    line-height: 1.65;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Top Contact Bar */
.top-bar {
    background: linear-gradient(90deg, #0a3663 0%, #072748 100%);
    color: #ffffff;
    font-size: 0.825rem;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-bar a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.2s;
}

.top-bar a:hover {
    color: var(--medical-teal);
}

/* Header & Sticky Navbar */
.main-header {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    transition: all 0.3s ease;
    z-index: 1040;
}

.navbar-brand .logo-badge {
    width: 44px;
    height: 44px;
    background: var(--gradient-btn);
    color: #fff;
    border-radius: 12px;
    font-weight: 800;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 168, 150, 0.3);
}

.nav-link {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-dark) !important;
    padding: 8px 12px !important;
    transition: color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--medical-teal) !important;
}

/* Fix Bootstrap Dropdown Caret Arrow */
.dropdown-toggle::after {
    display: inline-block;
    margin-left: 0.35em;
    vertical-align: 0.2em;
}

.dropdown-menu {
    border-radius: 16px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-md);
    padding: 10px;
    animation: fadeInDown 0.25s ease;
}

.dropdown-item {
    border-radius: 8px;
    padding: 8px 16px;
    font-weight: 500;
    font-size: 0.88rem;
    transition: all 0.2s;
}

.dropdown-item:hover {
    background-color: rgba(0, 168, 150, 0.08);
    color: var(--medical-teal);
    transform: translateX(4px);
}

/* Hero Section Carousel */
.hero-slider {
    position: relative;
    border-bottom-left-radius: 32px;
    border-bottom-right-radius: 32px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.carousel-item {
    height: 540px;
    background-size: cover;
    background-position: center;
}

.carousel-overlay {
    background: var(--gradient-hero);
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
}

/* Custom Buttons */
.btn-medical {
    background: var(--gradient-btn);
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 16px rgba(0, 168, 150, 0.3);
    transition: all 0.3s ease;
}

.btn-medical:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 168, 150, 0.45);
    color: #ffffff;
}

/* Modern Cards */
.custom-card {
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.custom-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

body.dark-mode .custom-card {
    background: #1e293b;
}

/* Badges & Section Titles */
.section-badge {
    background-color: rgba(0, 168, 150, 0.12);
    color: var(--medical-teal);
    font-weight: 700;
    padding: 6px 18px;
    border-radius: 30px;
    font-size: 0.78rem;
    letter-spacing: 0.8px;
    display: inline-block;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title {
    color: var(--primary-navy);
    font-weight: 800;
    letter-spacing: -0.5px;
}

body.dark-mode .section-title {
    color: #60a5fa;
}

/* Floating WhatsApp Button with Pulse */
.whatsapp-float {
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 56px;
    height: 56px;
    background-color: #25d366;
    color: #fff;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
    animation: pulseWhatsapp 2s infinite;
}

@keyframes pulseWhatsapp {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

.whatsapp-float:hover {
    transform: scale(1.1);
    color: #fff;
}

/* Announcement Marquee */
.notice-marquee {
    background: linear-gradient(90deg, #fff8e6 0%, #fef3c7 100%);
    border: 1px solid #fde68a;
    color: #92400e;
    padding: 12px 20px;
    border-radius: 16px;
    font-weight: 600;
}

/* Counters Box */
.counter-box {
    text-align: center;
    padding: 24px 16px;
    border-radius: var(--radius-lg);
    background: #ffffff;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
}

.counter-number {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--medical-teal);
    line-height: 1.1;
}

/* Footer Styling */
footer {
    background: linear-gradient(180deg, #0a3663 0%, #061e38 100%);
    color: #cbd5e1;
}

footer h5 {
    color: #ffffff;
    font-weight: 700;
    margin-bottom: 20px;
}

footer a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--medical-teal);
}

/* Media Queries for Mobile Responsiveness */
@media (max-width: 1199.98px) {
    .navbar-collapse {
        background: #ffffff;
        border-radius: 16px;
        padding: 20px;
        margin-top: 15px;
        box-shadow: var(--shadow-md);
        border: 1px solid var(--card-border);
    }
    body.dark-mode .navbar-collapse {
        background: #1e293b;
    }
    .carousel-item {
        height: 440px;
    }
    .hero-slider {
        border-radius: 0;
    }
}

@media (max-width: 767.98px) {
    .carousel-item {
        height: 380px;
    }
    .display-4, .display-5 {
        font-size: 2.2rem;
    }
    .display-6 {
        font-size: 1.75rem;
    }
    .counter-number {
        font-size: 1.8rem;
    }
    .top-bar {
        font-size: 0.78rem;
    }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}