/* Duvaal International School - Premium Design System */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
    --primary-blue: #1A3668;
    --primary-light: #254b8d;
    --primary-dark: #0f1f3d;
    --accent-red: #E31837;
    --accent-red-hover: #c4142f;
    --text-dark: #111827;
    --text-muted: #4b5563;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --transition-base: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-soft: 0 10px 40px -10px rgba(0, 0, 0, 0.08);
    --shadow-strong: 0 20px 50px -10px rgba(26, 54, 104, 0.12);
    --border-radius: 16px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    overflow-x: hidden;
    line-height: 1.6;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* --- Navigation & Top Bar --- */

.top-bar {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.8rem;
    padding: 10px 0;
    font-weight: 500;
    letter-spacing: 0.03em;
}

.top-bar a {
    color: white;
    text-decoration: none;
    transition: var(--transition-base);
}

.top-bar a:hover {
    color: var(--accent-red);
}

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px 0;
    transition: var(--transition-base);
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.navbar.scrolled {
    padding: 14px 0;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-soft);
}

.navbar-brand img {
    height: 60px;
    width: auto;
    transition: var(--transition-base);
}

.navbar.scrolled .navbar-brand img {
    height: 45px;
}

.nav-link {
    font-weight: 600;
    color: var(--text-dark) !important;
    margin: 0 12px;
    font-size: 0.95rem;
    opacity: 0.8;
    transition: var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    opacity: 1;
    color: var(--primary-blue) !important;
}

/* --- Hover Submenus --- */
@media (min-width: 992px) {
    .nav-item.dropdown:hover .dropdown-menu {
        display: block;
        margin-top: 0;
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        transition: var(--transition-base);
    }

    .dropdown-menu {
        display: block;
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: var(--transition-base);
    }
}

/* --- Premium Buttons --- */

.btn-premium {
    background: linear-gradient(135deg, var(--accent-red) 0%, #b3122c 100%);
    color: white;
    padding: 14px 36px;
    border-radius: 12px;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    border: none;
    transition: var(--transition-base);
    box-shadow: 0 8px 25px -5px rgba(227, 24, 55, 0.35);
}

.btn-premium:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 15px 35px -5px rgba(227, 24, 55, 0.45);
    color: white;
}

.btn-outline-premium {
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: 12px 32px;
    border-radius: 12px;
    font-weight: 700;
    transition: var(--transition-base);
    background: transparent;
}

.btn-outline-premium:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-3px);
}

/* --- Hero Section & Transitions --- */

.hero-section {
    position: relative;
    height: 95vh;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.4);
    transform: scale(1.1);
    transition: transform 8s ease-out;
}

.carousel-item.active .hero-slide {
    transform: scale(1);
}

.hero-content {
    position: relative;
    z-index: 5;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: white;
    max-width: 900px;
}

.hero-title {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 24px;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 400;
    margin-bottom: 45px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Modern Cards & UI --- */

.value-card {
    background: var(--bg-white);
    padding: 50px 40px;
    border-radius: var(--border-radius);
    transition: var(--transition-base);
    border: 1px solid rgba(0, 0, 0, 0.03);
    box-shadow: var(--shadow-soft);
}

.value-card:hover {
    transform: translateY(-15px);
    box-shadow: var(--shadow-strong);
    border-color: rgba(26, 54, 104, 0.1);
}

.value-icon {
    width: 80px;
    height: 80px;
    background: rgba(26, 54, 104, 0.05);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin: 0 auto 30px;
    transition: var(--transition-base);
}

.value-card:hover .value-icon {
    background: var(--primary-blue);
    color: white;
    transform: rotateY(180deg);
}

/* --- Section Styling --- */

.section-header {
    margin-bottom: 80px;
}

.section-header h2 {
    font-size: 3rem;
    color: var(--primary-blue);
}

.text-accent-red {
    color: var(--accent-red) !important;
}

/* --- Parallax & Glass Sections --- */

.parallax-section {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.glass-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 60px;
}

/* --- Footer --- */

footer {
    background: #0b1120;
    color: rgba(255, 255, 255, 0.7);
    padding: 100px 0 40px;
}

.footer-logo {
    height: 80px;
    width: auto;
    object-fit: contain;
    margin-bottom: 1.5rem;
}

footer h5 {
    color: white;
    font-size: 1.25rem;
    margin-bottom: 30px;
}

footer li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition-base);
    display: inline-block;
    margin-bottom: 12px;
}

footer li a:hover {
    color: var(--accent-red);
    transform: translateX(5px);
}

.footer-social {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-right: 12px;
    transition: var(--transition-base);
}

.footer-social:hover {
    background: var(--accent-red);
    transform: translateY(-5px);
}

/* --- Utils --- */

.shadow-soft {
    box-shadow: var(--shadow-soft) !important;
}

.shadow-medium {
    box-shadow: 0 15px 45px -10px rgba(0, 0, 0, 0.1) !important;
}

.shadow-strong {
    box-shadow: var(--shadow-strong) !important;
}

.premium-input {
    border-radius: 12px;
    border: 2px solid rgba(0, 0, 0, 0.05);
    padding: 12px 20px;
    transition: var(--transition-base);
    background: #fdfdfd;
}

.premium-input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(26, 54, 104, 0.1);
    background-color: #fff;
    outline: none;
}

.letter-spacing-sm {
    letter-spacing: 0.05em;
}

.letter-spacing-lg {
    letter-spacing: 0.15em;
}

.object-fit-cover {
    object-fit: cover;
}

.transition-base {
    transition: var(--transition-base);
}

.rounded-4 {
    border-radius: 1.25rem !important;
}

.rounded-5 {
    border-radius: 1.75rem !important;
}

.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.bg-primary-dark {
    background: var(--primary-dark) !important;
}

.bg-primary-blue {
    background: var(--primary-blue) !important;
}

/* Responsive Overrides */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.8rem;
    }

    .hero-section {
        height: 80vh;
    }

    .section-header h2 {
        font-size: 2.2rem;
    }

    .navbar {
        padding: 15px 0;
    }
}