/* ── Reset & Base ─────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-midnight: #0A1628;
    --color-midnight-light: #132240;
    --color-midnight-mid: #1A2D4A;
    --color-mint: #34D4B8;
    --color-mint-light: #5EEAD4;
    --color-mint-dark: #2BC4A8;
    --color-cream: #F5F1EB;
    --color-cream-light: #FAF7F2;
    --color-white: #FFFFFF;
    --color-text: #1A1A1A;
    --color-text-light: #6B7280;
    --color-text-inverse: #F5F1EB;
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --space-2xl: 8rem;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-cream);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-sm);
    background: var(--color-mint);
    color: var(--color-midnight);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    z-index: 200;
    font-weight: 600;
}
.skip-link:focus {
    top: var(--space-sm);
}

/* ── Typography ───────────────────────────────────── */
.section-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-mint-dark);
    margin-bottom: var(--space-sm);
}

.section-heading {
    font-family: var(--font-serif);
    font-size: clamp(2.25rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-midnight);
    margin-bottom: var(--space-md);
}

.lead {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text-light);
    max-width: 560px;
    margin-bottom: var(--space-md);
}

.lead + p {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text-light);
}

/* ── Buttons ──────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.875rem 2rem;
    border-radius: 100px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-mint);
    color: var(--color-midnight);
    border-color: var(--color-mint);
}
.btn-primary:hover {
    background: var(--color-mint-dark);
    border-color: var(--color-mint-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(52, 212, 184, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-midnight);
    border-color: var(--color-midnight);
}
.btn-outline:hover {
    background: var(--color-midnight);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-light {
    background: var(--color-white);
    color: var(--color-midnight);
    border-color: var(--color-white);
}
.btn-light:hover {
    background: var(--color-cream);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.btn-outline-light {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,0.5);
}
.btn-outline-light:hover {
    border-color: var(--color-white);
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ── Header ───────────────────────────────────────── */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(245, 241, 235, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(10, 22, 40, 0.06);
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: 0 4px 30px rgba(10, 22, 40, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-midnight);
    line-height: 1.2;
}
.logo em {
    font-style: italic;
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--color-mint-dark);
}

.logo-icon {
    flex-shrink: 0;
}

.logo-light {
    color: var(--color-white);
}
.logo-light em {
    color: var(--color-mint);
}

/* ── Navigation ───────────────────────────────────── */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 110;
}
.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-midnight);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}
.nav-list a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-midnight);
    position: relative;
    padding: 0.25rem 0;
    transition: color var(--transition);
}
.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-mint);
    transition: width var(--transition);
}
.nav-list a:hover::after {
    width: 100%;
}
.nav-list a:hover {
    color: var(--color-mint-dark);
}

.nav-cta {
    background: var(--color-midnight);
    color: var(--color-mint) !important;
    padding: 0.5rem 1.25rem;
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 600;
    transition: var(--transition);
}
.nav-cta::after {
    display: none;
}
.nav-cta:hover {
    background: var(--color-midnight-light);
    color: var(--color-mint-light) !important;
    transform: translateY(-1px);
}

/* ── Hero ─────────────────────────────────────────── */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--color-cream);
    overflow: hidden;
    padding-top: 72px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
}

.hero-content {
    padding-right: var(--space-md);
}

.hero-eyebrow {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-mint-dark);
    background: rgba(52, 212, 184, 0.12);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    margin-bottom: var(--space-md);
}

.hero-headline {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    font-weight: 900;
    line-height: 1.05;
    color: var(--color-midnight);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}
.hero-headline em {
    font-style: italic;
    color: var(--color-mint-dark);
}

.hero-dek {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-text-light);
    max-width: 480px;
    margin-bottom: var(--space-md);
}

.hero-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
}

.hero-image-frame {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 32px 64px rgba(10, 22, 40, 0.2);
}
.hero-image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 3/4;
}

.hero-stats {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}
.stat {
    display: flex;
    flex-direction: column;
}
.stat-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-midnight);
    line-height: 1;
}
.stat-label {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

.hero-accent {
    position: absolute;
    top: 15%;
    right: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(52, 212, 184, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
}

/* ── About ────────────────────────────────────────── */
.about {
    padding: var(--space-2xl) 0;
    background: var(--color-white);
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.about-text .section-heading {
    margin-bottom: var(--space-md);
}

.about-text p {
    margin-bottom: var(--space-sm);
}

.about-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.value {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-midnight);
}

.value-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: rgba(52, 212, 184, 0.12);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-mint-dark);
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 24px 48px rgba(10, 22, 40, 0.12);
}
.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 5/6.5;
}

/* ── Courses ──────────────────────────────────────── */
.courses {
    padding: var(--space-2xl) 0;
    background: var(--color-midnight);
}

.courses .section-eyebrow {
    color: var(--color-mint);
}

.courses .section-heading {
    color: var(--color-white);
}

.courses .section-dek {
    color: rgba(245, 241, 235, 0.6);
    max-width: 560px;
    font-size: 1.0625rem;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}
.section-header .section-dek {
    margin: 0 auto;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.course-card {
    background: var(--color-midnight-light);
    border: 1px solid rgba(52, 212, 184, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.course-card:hover {
    border-color: rgba(52, 212, 184, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.course-number {
    font-family: var(--font-serif);
    font-size: 4rem;
    font-weight: 900;
    color: rgba(52, 212, 184, 0.1);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.course-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-xs);
}

.course-desc {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: rgba(245, 241, 235, 0.6);
    margin-bottom: var(--space-sm);
}

.course-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--space-md);
}

.course-features li {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-mint);
    background: rgba(52, 212, 184, 0.1);
    padding: 0.375rem 0.75rem;
    border-radius: 100px;
}

.course-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-white);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap var(--transition);
}
.course-link:hover {
    gap: 0.75rem;
    color: var(--color-mint);
}

/* ── Dive / Experience ────────────────────────────── */
.dive {
    padding: var(--space-2xl) 0;
    background: var(--color-cream);
}

.dive-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.dive-content .section-heading {
    margin-bottom: var(--space-md);
}

.dive-highlights {
    margin-top: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.highlight {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
}

.highlight-num {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: var(--color-mint);
    color: var(--color-midnight);
    font-family: var(--font-serif);
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
}

.highlight p {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-text-light);
    padding-top: 0.3rem;
}

.dive-images {
    position: relative;
    padding-top: var(--space-md);
}

.dive-img-main {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 24px 48px rgba(10, 22, 40, 0.12);
    margin-bottom: var(--space-md);
}
.dive-img-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 5/6;
}

.dive-img-secondary {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 16px 32px rgba(10, 22, 40, 0.1);
    border: 4px solid var(--color-cream);
}
.dive-img-secondary img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 4/3;
}

/* ── CTA Banner ───────────────────────────────────── */
.cta-banner {
    padding: var(--space-2xl) 0;
    background: var(--color-mint);
}

.cta-inner {
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
}

.cta-heading {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-midnight);
    margin-bottom: var(--space-sm);
}

.cta-dek {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: rgba(10, 22, 40, 0.7);
    margin-bottom: var(--space-md);
}

.cta-actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Contact ──────────────────────────────────────── */
.contact {
    padding: var(--space-2xl) 0;
    background: var(--color-white);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.contact-info .section-heading {
    margin-bottom: var(--space-md);
}

.contact-details {
    font-style: normal;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-light);
}

.contact-item a {
    color: var(--color-midnight);
    font-weight: 600;
    font-size: 1.125rem;
    transition: color var(--transition);
}
.contact-item a:hover {
    color: var(--color-mint-dark);
}

.contact-item span {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.contact-map {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(10, 22, 40, 0.08);
}

/* ── Contact Form ─────────────────────────────────── */
.contact-form-wrap {
    background: var(--color-cream);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
}

.form-heading {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-midnight);
    margin-bottom: 0.5rem;
}

.form-dek {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}

.form-group {
    margin-bottom: var(--space-sm);
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-midnight);
    margin-bottom: 0.375rem;
    letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid rgba(10, 22, 40, 0.1);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--color-text);
    background: var(--color-white);
    transition: border-color var(--transition);
    appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-mint);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group-full {
    grid-column: 1 / -1;
}

.form-success {
    text-align: center;
    padding: var(--space-lg) var(--space-md);
}
.form-success h4 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-midnight);
    margin: var(--space-sm) 0 0.5rem;
}
.form-success p {
    color: var(--color-text-light);
    font-size: 0.9375rem;
}

/* ── Footer ───────────────────────────────────────── */
.site-footer {
    background: var(--color-midnight);
    color: var(--color-text-inverse);
    padding: var(--space-xl) 0 var(--space-sm);
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-lg);
    padding-bottom: var(--space-lg);
}

.footer-brand p {
    font-size: 0.9375rem;
    color: rgba(245, 241, 235, 0.5);
    line-height: 1.7;
    max-width: 300px;
    margin-top: var(--space-sm);
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: rgba(245, 241, 235, 0.5);
    transition: color var(--transition);
}
.footer-links a:hover {
    color: var(--color-mint);
}

.footer-contact p {
    font-size: 0.875rem;
    color: rgba(245, 241, 235, 0.5);
    line-height: 1.7;
    margin-bottom: 0.25rem;
}
.footer-contact a {
    color: var(--color-mint);
    font-weight: 600;
    transition: color var(--transition);
}
.footer-contact a:hover {
    color: var(--color-mint-light);
}

.footer-bottom {
    border-top: 1px solid rgba(245, 241, 235, 0.08);
    padding-top: var(--space-md);
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: rgba(245, 241, 235, 0.35);
}

/* ── Scroll Reveal (progressive enhancement) ─────── */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal[data-reveal] {
    opacity: 0;
    transform: translateY(24px);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal[data-reveal] {
        opacity: 0;
        transform: translateY(24px);
    }
    .reveal[data-reveal].revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content {
        padding-right: 0;
        order: 1;
    }
    .hero-visual {
        order: 2;
        max-width: 480px;
        margin: 0 auto;
    }
    .hero-dek {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-accent {
        display: none;
    }

    .about-container,
    .dive-grid,
    .contact-container {
        grid-template-columns: 1fr;
    }
    .about-image {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }

    .course-grid {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 3rem;
        --space-xl: 4rem;
        --space-2xl: 5rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-list {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        background: var(--color-cream);
        flex-direction: column;
        align-items: stretch;
        padding: 100px var(--space-md) var(--space-md);
        gap: 0;
        box-shadow: -8px 0 30px rgba(10, 22, 40, 0.15);
        transform: translateX(100%);
        transition: transform var(--transition);
        z-index: 105;
    }
    .nav-list.open {
        transform: translateX(0);
    }
    .nav-list li {
        border-bottom: 1px solid rgba(10, 22, 40, 0.06);
    }
    .nav-list a {
        display: block;
        padding: 1rem 0;
        font-size: 1rem;
    }
    .nav-list a::after {
        display: none;
    }
    .nav-cta {
        margin-top: var(--space-sm);
        text-align: center;
    }

    .hero-headline {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .about-values {
        grid-template-columns: 1fr;
    }

    .dive-images {
        padding-top: 0;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .footer-bottom-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .btn {
        justify-content: center;
    }

    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
}