@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&family=Abril+Fatface&display=swap');

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

:root {
    --ocean-deep: #0c1929;
    --ocean-mid: #1a3a5c;
    --teal-bright: #00d4aa;
    --aqua-light: #7fdbda;
    --foam-white: #e8f4f8;
    --sand-gold: #d4a574;
    --coral-red: #e06377;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Montserrat', sans-serif;
    background: linear-gradient(180deg, var(--ocean-deep) 0%, var(--ocean-mid) 100%);
    color: var(--foam-white);
    min-height: 100vh;
    line-height: 1.75;
}

h1, h2, h3 {
    font-family: 'Abril Fatface', cursive;
    font-weight: 400;
}

h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
}

a {
    color: var(--teal-bright);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--aqua-light);
}

/* Top Navigation */
.main-header {
    background: rgba(12, 25, 41, 0.92);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 212, 170, 0.2);
}

.header-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 30px;
    max-width: 1600px;
    margin: 0 auto;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-area svg {
    width: 52px;
    height: 52px;
}

.logo-area h1 {
    font-size: 1.7rem;
    color: var(--teal-bright);
    letter-spacing: 2px;
}

.mobile-menu-btn {
    display: none;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--teal-bright);
    margin: 5px 0;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.primary-nav ul {
    display: flex;
    list-style: none;
    gap: 38px;
}

.primary-nav a {
    color: var(--foam-white);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 10px 0;
    position: relative;
}

.primary-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--teal-bright);
    transition: width 0.3s ease;
}

.primary-nav a:hover::after {
    width: 100%;
}

.primary-nav a:hover {
    color: var(--teal-bright);
}

/* Hero */
.hero-banner {
    padding: 160px 30px 90px;
    text-align: center;
    background: 
        radial-gradient(ellipse at 50% 80%, rgba(0, 212, 170, 0.15) 0%, transparent 60%);
}

.hero-banner h1 {
    font-size: 3.2rem;
    margin-bottom: 25px;
    color: var(--foam-white);
}

.hero-banner h1 span {
    color: var(--teal-bright);
}

.hero-tagline {
    font-size: 1.15rem;
    color: var(--aqua-light);
    max-width: 680px;
    margin: 0 auto;
    font-weight: 300;
}

/* Wave Cards */
.wave-cards {
    display: flex;
    justify-content: center;
    gap: 25px;
    padding: 60px 30px;
    flex-wrap: wrap;
    max-width: 1350px;
    margin: 0 auto;
}

.wave-card {
    background: linear-gradient(145deg, rgba(26, 58, 92, 0.7) 0%, rgba(12, 25, 41, 0.9) 100%);
    border: 1px solid rgba(0, 212, 170, 0.25);
    border-radius: 20px;
    padding: 38px 32px;
    text-align: center;
    flex: 1;
    min-width: 270px;
    max-width: 360px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.wave-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 212, 170, 0.2);
}

.wave-card .wave-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.wave-card h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--teal-bright);
    margin-bottom: 12px;
}

.wave-card p {
    color: var(--aqua-light);
    font-size: 0.95rem;
    font-weight: 300;
}

/* Game Aquarium */
.game-aquarium {
    padding: 70px 30px;
}

.game-aquarium h2 {
    text-align: center;
    font-size: 2.4rem;
    margin-bottom: 40px;
    color: var(--foam-white);
}

.aquarium-container {
    background: var(--ocean-deep);
    border: 3px solid var(--teal-bright);
    border-radius: 25px;
    overflow: hidden;
    max-width: 1100px;
    margin: 0 auto;
    box-shadow: 0 0 50px rgba(0, 212, 170, 0.25);
}

.aquarium-container iframe {
    width: 100%;
    height: 560px;
    border: none;
    display: block;
}

/* Features Reef */
.features-reef {
    padding: 80px 30px;
    background: rgba(26, 58, 92, 0.3);
}

.features-reef h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 50px;
}

.reef-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 35px;
    max-width: 1400px;
    margin: 0 auto;
}

.reef-item {
    text-align: center;
    padding: 30px 20px;
}

.reef-item .reef-symbol {
    font-size: 3.5rem;
    margin-bottom: 18px;
}

.reef-item h4 {
    color: var(--teal-bright);
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.reef-item p {
    color: var(--aqua-light);
    font-size: 0.9rem;
    font-weight: 300;
}

/* About Depths */
.about-depths {
    padding: 80px 30px;
}

.depths-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.depths-content h2 {
    font-size: 2.2rem;
    margin-bottom: 30px;
    color: var(--teal-bright);
}

.depths-content p {
    margin-bottom: 20px;
    color: var(--aqua-light);
    font-size: 1.05rem;
    font-weight: 300;
}

/* Footer */
.ocean-footer {
    background: var(--ocean-deep);
    border-top: 1px solid rgba(0, 212, 170, 0.2);
    padding: 50px 30px;
    text-align: center;
}

.ocean-footer h4 {
    color: var(--teal-bright);
    margin-bottom: 25px;
    font-size: 1rem;
}

.footer-resources {
    display: flex;
    justify-content: center;
    gap: 45px;
    flex-wrap: wrap;
    margin-bottom: 35px;
}

.footer-resources a {
    color: var(--aqua-light);
    font-size: 0.95rem;
}

.footer-resources a:hover {
    color: var(--teal-bright);
}

.footer-legal {
    border-top: 1px solid rgba(0, 212, 170, 0.15);
    padding-top: 25px;
    color: var(--aqua-light);
    font-size: 0.85rem;
    font-weight: 300;
}

/* Age Verification */
.age-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(12, 25, 41, 0.98);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.age-dialog {
    background: linear-gradient(145deg, var(--ocean-mid) 0%, var(--ocean-deep) 100%);
    border: 2px solid var(--teal-bright);
    border-radius: 25px;
    padding: 50px;
    text-align: center;
    max-width: 440px;
    box-shadow: 0 0 60px rgba(0, 212, 170, 0.3);
}

.age-dialog h2 {
    color: var(--teal-bright);
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.age-dialog p {
    color: var(--aqua-light);
    margin-bottom: 35px;
    font-weight: 300;
}

.age-dialog-btns {
    display: flex;
    gap: 18px;
    justify-content: center;
}

.btn-dive, .btn-surface {
    padding: 15px 38px;
    border: none;
    border-radius: 30px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-dive {
    background: var(--teal-bright);
    color: var(--ocean-deep);
}

.btn-dive:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(0, 212, 170, 0.4);
}

.btn-surface {
    background: transparent;
    border: 2px solid var(--aqua-light);
    color: var(--aqua-light);
}

.btn-surface:hover {
    border-color: var(--coral-red);
    color: var(--coral-red);
}

.age-hidden {
    display: none !important;
}

/* Page Layouts */
.page-banner {
    padding: 150px 30px 60px;
    text-align: center;
    background: radial-gradient(ellipse at top, rgba(0, 212, 170, 0.1) 0%, transparent 60%);
}

.page-banner h1 {
    font-size: 2.6rem;
    color: var(--foam-white);
}

.page-main {
    padding: 50px 30px 80px;
    max-width: 920px;
    margin: 0 auto;
}

.page-main h2 {
    margin: 45px 0 20px;
    font-size: 1.7rem;
    color: var(--teal-bright);
}

.page-main h3 {
    margin: 35px 0 15px;
    font-size: 1.3rem;
    color: var(--aqua-light);
}

.page-main p {
    margin-bottom: 18px;
    color: var(--aqua-light);
    font-weight: 300;
}

.page-main ul {
    margin: 20px 0 25px 32px;
    color: var(--aqua-light);
}

.page-main li {
    margin-bottom: 12px;
    font-weight: 300;
}

/* Play Page */
.play-banner {
    padding: 140px 30px 50px;
    text-align: center;
}

.play-banner h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.game-tips {
    max-width: 780px;
    margin: 35px auto;
    padding: 28px;
    background: rgba(26, 58, 92, 0.5);
    border-radius: 15px;
    border-left: 4px solid var(--teal-bright);
}

.game-tips h3 {
    color: var(--teal-bright);
    margin-bottom: 12px;
    font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 992px) {
    .reef-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .primary-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(12, 25, 41, 0.98);
        border-top: 1px solid rgba(0, 212, 170, 0.2);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
    }
    
    .primary-nav.open {
        max-height: 380px;
    }
    
    .primary-nav ul {
        flex-direction: column;
        padding: 20px 30px;
        gap: 0;
    }
    
    .primary-nav li {
        border-bottom: 1px solid rgba(0, 212, 170, 0.15);
    }
    
    .primary-nav a {
        display: block;
        padding: 15px 0;
    }
    
    .hero-banner h1 {
        font-size: 2.2rem;
    }
    
    .wave-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .wave-card {
        max-width: 100%;
    }
    
    .reef-grid {
        grid-template-columns: 1fr;
    }
    
    .aquarium-container iframe {
        height: 420px;
    }
    
    .footer-resources {
        flex-direction: column;
        gap: 15px;
    }
    
    .age-dialog {
        margin: 20px;
        padding: 35px 25px;
    }
    
    .age-dialog-btns {
        flex-direction: column;
    }
}