/* CSS Variables - Deep Blue & Sand Brown Palette */
:root {
    /* Deep Blue Ocean tones */
    --primary-color: #051923; /* Very Deep Navy */
    --secondary-color: #0A2436; /* Dark Blue */
    --accent-blue: #00A6FB; /* Vibrant Cyan for highlights */
    
    /* Brown/Sand tones reflecting 'The Brown Diving' */
    --brown-primary: #C58F59; /* Sand/Bronze color */
    --brown-dark: #8C5C32;
    --brown-light: #E3BC9A;
    
    /* Neutrals */
    --text-light: #F0F4F8;
    --text-dark: #121A2F;
    --text-muted: #9BA4B5;
    
    /* Backgrounds */
    --bg-main: #F8F9FA;
    --bg-dark: #0A1929;
    --bg-card: #FFFFFF;
    --bg-card-dark: #132439;
    
    /* Shadows */
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(197, 143, 89, 0.3);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-family: 'Prompt', 'Outfit', sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-main);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', 'Prompt', sans-serif;
    font-weight: 700;
    color: var(--primary-color);
}

p {
    line-height: 1.6;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 100px 0;
}

.text-center { text-align: center; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }

/* Utilities */
.brown-text {
    color: var(--brown-primary);
}

.bg-dark {
    background-color: var(--bg-dark);
    color: var(--text-light);
}

.bg-dark h1, .bg-dark h2, .bg-dark h3 {
    color: var(--text-light);
}

.underline {
    width: 60px;
    height: 4px;
    background: var(--brown-primary);
    margin: 15px auto 30px;
    border-radius: 2px;
}

.underline.left {
    margin-left: 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--brown-primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--brown-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background-color: var(--accent-blue);
    color: #fff;
}

.btn-secondary:hover {
    background-color: #008CC9;
    transform: translateY(-3px);
}

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

.btn-outline:hover {
    background-color: var(--brown-primary);
    color: #fff;
}

.bg-dark .btn-outline {
    color: var(--text-light);
    border-color: var(--text-light);
}

.bg-dark .btn-outline:hover {
    background-color: var(--text-light);
    color: var(--primary-color);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(5, 25, 35, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 10px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-light);
    font-weight: 500;
    font-size: 1rem;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--brown-primary);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
    background-color: #fff;
}

/* Hero Section */
.hero {
    height: 100vh;
    background-image: url('https://images.unsplash.com/photo-1544551763-46a013bb70d5?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(5, 25, 35, 0.7), rgba(5, 25, 35, 0.4));
}

.hero-content {
    position: relative;
    z-index: 1;
    color: #fff;
    max-width: 800px;
    padding: 0 20px;
}

.hero h1 {
    font-size: 4.5rem;
    color: #fff;
    margin-bottom: 20px;
    text-shadow: 2px 4px 10px rgba(0,0,0,0.5);
    letter-spacing: 2px;
}

.hero p {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* Grids */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.align-center { align-items: center; }

/* Features */
.feature-card {
    background: var(--bg-card);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    color: var(--brown-primary);
    margin-bottom: 20px;
}

/* Courses */
.course-card {
    background: var(--bg-card-dark);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.4);
}

.course-img {
    height: 250px;
    background-size: cover;
    background-position: center;
}

.course-content {
    padding: 30px;
}

.course-details {
    margin: 20px 0;
}

.course-details li {
    margin-bottom: 10px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}

.course-details i {
    color: var(--brown-primary);
    width: 20px;
}

/* Trips */
.trip-card {
    background: var(--bg-card);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
}

.trip-card:hover {
    transform: translateY(-10px);
}

.trip-img {
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--primary-color);
    color: #fff;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge.premium {
    background: var(--brown-primary);
}

.trip-info {
    padding: 25px;
}

/* Shop */
.shop-features {
    margin: 30px 0;
}

.shop-features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
}

.shop-features i {
    color: var(--brown-primary);
    font-size: 1.2rem;
}

.rounded-img {
    border-radius: 20px;
}

.shadow {
    box-shadow: var(--shadow-lg);
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.contact-info-box {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
}

.contact-info-box:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.contact-info-box h3 {
    margin-bottom: 15px;
}

.contact-info-box i {
    color: var(--brown-primary);
    font-size: 1.5rem;
    margin-right: 10px;
}

/* Footer */
footer {
    background: var(--primary-color);
    color: var(--text-muted);
    padding: 40px 0;
}

/* Animations */
.fade-in-up {
    animation: fadeInUp 1s ease-out forwards;
    opacity: 0;
    transform: translateY(30px);
}

.delay-1 { animation-delay: 0.3s; }
.delay-2 { animation-delay: 0.6s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 992px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .hero h1 { font-size: 3.5rem; }
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(5, 25, 35, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }
    
    .nav-menu.active { left: 0; }
    
    .nav-item { margin: 2.5rem 0; }
    
    .menu-toggle.is-active .bar:nth-child(2) { opacity: 0; }
    .menu-toggle.is-active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .menu-toggle.is-active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

    .grid-2, .grid-3, .contact-grid { grid-template-columns: 1fr; }
    
    .hero h1 { font-size: 2.5rem; }
    .hero-buttons { flex-direction: column; }
    
    .shop-image { margin-top: 40px; }
}

/* Course Prices */
.course-price {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
}

/* Shop Category */
.shop-category {
    background: var(--bg-card-dark);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.shop-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.shop-category i {
    font-size: 2.5rem;
    color: var(--brown-primary);
    margin-bottom: 20px;
}

/* Contact Form */
.contact-form-container {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--brown-primary);
    box-shadow: 0 0 0 3px rgba(197, 143, 89, 0.2);
}

.w-100 {
    width: 100%;
}

/* Social Links */
.social-links {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-main);
    padding: 8px 15px;
    border-radius: 20px;
    font-weight: 500;
    transition: var(--transition);
}

.social-icon:hover {
    background: var(--brown-primary);
    color: #fff;
}

.footer-social a {
    color: var(--text-light);
    font-size: 1.5rem;
    margin: 0 10px;
    transition: var(--transition);
}

.footer-social a:hover {
    color: var(--brown-primary);
    transform: translateY(-3px);
    display: inline-block;
}

.text-left {
    text-align: left;
}

/* Course Details Page */
.page-header {
    background-size: cover;
    background-position: center;
    position: relative;
}

.course-detail-row {
    display: flex;
    align-items: center;
    gap: 50px;
    margin-bottom: 50px;
}

.course-detail-row.reverse {
    flex-direction: row-reverse;
}

.course-detail-img, .course-detail-info {
    flex: 1;
}

.course-specs {
    margin: 20px 0;
}

.course-specs li {
    margin-bottom: 10px;
}

.course-specs i {
    color: var(--brown-primary);
    margin-right: 10px;
    width: 20px;
}

.course-divider {
    border: 0;
    height: 1px;
    background: #e0e0e0;
    margin: 60px 0;
}

/* Admin Dashboard */
.admin-container {
    max-width: 800px;
    margin: 100px auto;
    background: var(--bg-card);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.admin-login {
    max-width: 400px;
    margin: 150px auto;
}

.stat-box {
    background: var(--bg-main);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    margin-bottom: 30px;
}

.stat-box h3 {
    font-size: 2.5rem;
    color: var(--brown-primary);
}

.message-card {
    background: var(--bg-main);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid var(--brown-primary);
}

.message-card h4 {
    margin-bottom: 5px;
}

.message-date {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    .course-detail-row, .course-detail-row.reverse {
        flex-direction: column;
    }
}