/* literasikelautanprinsip.css - CSS Gabungan untuk Semua Prinsip Literasi Kelautan */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;900&display=swap');

:root {
    --pandora-blue-dark: #001a33;
    --pandora-blue-medium: #003366;
    --pandora-green-neon: #33ffcc;
    --pandora-purple-glow: #6633ff;
    --pandora-text-light: #ccffff;
    --pandora-text-medium: #99ccff;
    --pandora-border-glow: rgba(51, 255, 204, 0.3);
    --pandora-shadow-deep: 0 8px 25px rgba(0, 26, 51, 0.7);
    --pandora-card-shadow: 0 5px 15px rgba(51, 255, 204, 0.4);
    --pandora-card-hover-shadow: 0 14px 30px rgba(51, 255, 204, 0.7);
    --purple-gradient: linear-gradient(90deg, var(--pandora-purple-glow), var(--pandora-green-neon));
    --bg-dark: var(--pandora-blue-dark);
    --text-light: var(--pandora-text-light);
    --btn-purple: var(--pandora-purple-glow);
    --btn-purple-hover: #826ee9;
    --border-dark: rgba(255, 255, 255, 0.15);
    --shadow-glow: 0 0 10px var(--pandora-green-neon);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background-color: #01081a;
    color: var(--text-light);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
    background-image: url('bawah laut.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

a {
    text-decoration: none;
    color: inherit;
}

header {
    position: sticky;
    top: 0;
    background: rgba(1, 8, 26, 0.85);
    backdrop-filter: saturate(180%) blur(10px);
    z-index: 1000;
    padding: 1rem 2rem;
    box-shadow: 0 1px 6px rgb(0 0 0 / 0.4);
}

.navbar-nav .nav-link {
    color: var(--pandora-text-medium);
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus,
.navbar-nav .nav-item .nav-link.active {
    color: var(--pandora-green-neon);
    outline: none;
}

.navbar-brand {
    font-weight: 900;
    font-size: 1.5rem;
    background: var(--purple-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    user-select: none;
    white-space: nowrap;
}

.btn-buy-tickets {
    background: var(--purple-gradient);
    border: none;
    color: #fff;
    font-weight: 600;
    padding: 0.5rem 1.4rem;
    border-radius: 30px;
    transition: background 0.35s ease, box-shadow 0.35s ease;
}

.btn-buy-tickets:hover,
.btn-buy-tickets:focus {
    background: linear-gradient(90deg, var(--pandora-purple-glow), var(--pandora-green-neon));
    outline: none;
    box-shadow: var(--shadow-glow);
}

.navbar-toggler .material-icons {
    color: var(--pandora-green-neon);
    font-size: 32px;
}

.main-container {
    max-width: 900px;
    margin-top: 50px;
    padding-bottom: 50px;
}

main {
    padding: 0 20px 80px;
    background: transparent;
    min-height: calc(100vh - 72px - 50px);
    color: var(--text-light);
}

.page-header {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
    z-index: 1;
    padding: 20px;
}

/* Kotak blur di belakang judul */
.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(1, 8, 26, 0.7);
    backdrop-filter: blur(12px);
    border-radius: 18px;
    z-index: -1;
    border: 1px solid rgba(51, 255, 204, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    transition: all 0.5s ease;
}

.page-header h1 {
    font-weight: 900;
    font-size: clamp(2.5rem, 8vw, 4rem);
    letter-spacing: 0.1em;
    color: var(--pandora-green-neon);
    text-align: center;
    margin: 0;
    line-height: 1.2;
    animation: fadeInUp 1s ease forwards;
    opacity: 0;
    text-shadow:
        0 0 8px rgba(51, 255, 204, 0.6),
        0 0 15px rgba(51, 255, 204, 0.4),
        0 0 20px rgba(51, 255, 204, 0.2);
}

.page-header p {
    font-size: clamp(1rem, 4vw, 1.2rem);
    font-weight: 400;
    color: var(--pandora-text-medium);
    margin-top: 10px;
    opacity: 0;
    animation: fadeInUp 1s ease 0.3s forwards;
}

.content-wrapper {
    background: rgba(1, 8, 26, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    padding: 30px;
    box-shadow: var(--pandora-shadow-deep);
}

/* Gaya untuk Video Section (Prinsip 1, 2, 4, 5, 6) */
.video-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
    align-items: center;
    text-align: center;
}

.video-container {
    width: 100%;
    max-width: 800px;
}

.video-container video {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(51, 255, 204, 0.5);
    border: 2px solid var(--pandora-green-neon);
}

.video-description h3 {
    color: var(--pandora-green-neon);
    font-weight: 700;
    margin-top: 10px;
    margin-bottom: 10px;
    font-size: clamp(1.8rem, 4vw, 2.2rem);
    letter-spacing: 0.1em;
    text-shadow: 0 0 8px rgba(51, 255, 204, 0.6), 0 0 15px rgba(51, 255, 204, 0.4), 0 0 20px rgba(51, 255, 204, 0.2);
}

.video-description p {
    font-size: 1em;
    color: var(--pandora-text-light);
    text-align: justify;
    margin: 0;
    max-width: 100%;
}

/* Gaya untuk Teks Only Section (Prinsip 3) */
.text-only-section {
    margin-bottom: 40px;
    text-align: justify;
}

.text-only-section h3 {
    color: var(--pandora-green-neon);
    font-weight: 700;
    margin-top: 10px;
    margin-bottom: 20px;
    font-size: clamp(1.8rem, 4vw, 2.2rem);
    letter-spacing: 0.1em;
    text-shadow: 0 0 8px rgba(51, 255, 204, 0.6), 0 0 15px rgba(51, 255, 204, 0.4), 0 0 20px rgba(51, 255, 204, 0.2);
    text-align: center;
}

.text-only-section p {
    font-size: 1em;
    color: var(--pandora-text-light);
    line-height: 1.6;
    margin-bottom: 15px;
}

/* Gaya untuk Image Section (Prinsip 7) */
.image-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
    align-items: center;
    text-align: center;
}

.image-container {
    width: 100%;
    max-width: 800px;
}

.image-container img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(51, 255, 204, 0.5);
    border: 2px solid var(--pandora-green-neon);
}

.image-description h3 {
    color: var(--pandora-green-neon);
    font-weight: 700;
    margin-top: 10px;
    margin-bottom: 10px;
    font-size: clamp(1.8rem, 4vw, 2.2rem);
    letter-spacing: 0.1em;
    text-shadow: 0 0 8px rgba(51, 255, 204, 0.6), 0 0 15px rgba(51, 255, 204, 0.4), 0 0 20px rgba(51, 255, 204, 0.2);
}

.image-description p {
    font-size: 1em;
    color: var(--pandora-text-light);
    text-align: justify;
    margin: 0;
    max-width: 100%;
}

.button-container {
    text-align: center;
    margin-top: 40px;
}

.back-button {
    background: var(--purple-gradient);
    border: none;
    color: #fff;
    font-weight: 600;
    padding: 12px 25px;
    border-radius: 28px;
    font-size: 1.05rem;
    cursor: pointer;
    transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
    user-select: none;
    text-align: center;
    letter-spacing: 0.08em;
    box-shadow: 0 4px 15px rgba(102, 51, 255, 0.5);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.back-button:hover,
.back-button:focus-visible {
    background: linear-gradient(135deg, var(--pandora-green-neon), var(--pandora-purple-glow));
    outline: none;
    transform: translateY(-8px) scale(1.03);
    box-shadow: 0 8px 25px rgba(51, 255, 204, 0.8);
}

footer {
    background: rgba(0, 10, 20, 0.9);
    color: #777ba0;
    padding: 40px 15px;
    text-align: center;
    font-size: 0.875rem;
    user-select: none;
    border-top: 1px solid rgba(51, 255, 204, 0.2);
    margin-top: 40px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Responsive styles for mobile (less than 768px) --- */
@media (max-width: 767px) {
    .main-container {
        margin-top: 30px;
        padding-bottom: 30px;
    }

    .page-header {
        margin-bottom: 30px;
        padding: 15px;
    }

    .content-wrapper {
        padding: 20px;
    }
}

/* --- Desktop Layout (untuk video, image, dan text sections) --- */
@media (min-width: 768px) {
    .content-wrapper {
        padding: 50px;
    }

    /* Layout untuk Video/Image Section */
    .video-section,
    .image-section {
        flex-direction: row;
        text-align: left;
    }
    
    .video-section:nth-child(even),
    .image-section:nth-child(even) {
        flex-direction: row-reverse;
    }

    .video-container,
    .image-container {
        flex: 1;
    }

    .video-description,
    .image-description {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding-left: 20px;
    }
    
    .video-section:nth-child(even) .video-description,
    .image-section:nth-child(even) .image-description {
        padding-left: 0;
        padding-right: 20px;
    }

    .video-description p,
    .image-description p {
        text-align: left;
    }
}

.video-container iframe {
    width: 100%;
    height: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(51, 255, 204, 0.5);
    border: 2px solid var(--pandora-green-neon);
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; 
    height: 0;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(51, 255, 204, 0.5);
    border: 2px solid var(--pandora-green-neon);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 16px;
}