/* BlueDelta Seafood — Custom Design System */
:root {
    --bg-ink: hsl(338, 34%, 14%);
    --bg-surface: hsl(25, 38%, 96%);
    --color-accent: hsl(338, 72%, 43%);
    --color-supporting: hsl(174, 58%, 52%);
    --text-primary: #1e293b;
    --text-muted: #64748b;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Hind Siliguri', sans-serif;
    --radius-lg: 16px;
    --radius-md: 10px;
    --shadow-soft: 0 10px 30px rgba(0,0,0,0.06);
    --shadow-glow: 0 15px 35px rgba(0,0,0,0.12);
}

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

body {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    color: var(--bg-ink);
}

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

a:hover {
    opacity: 0.85;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header & Nav */
.site-header {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    padding: 18px 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--bg-ink);
}

.brand-logo span {
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    font-weight: 600;
    color: var(--text-primary);
}

.nav-links a:hover {
    color: var(--color-accent);
}

.cta-btn {
    display: inline-block;
    background: var(--color-accent);
    color: #ffffff !important;
    padding: 12px 26px;
    border-radius: var(--radius-md);
    font-weight: 600;
    box-shadow: 0 4px 14px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, background 0.3s ease;
}

.cta-btn:hover {
    transform: translateY(-2px);
    background: var(--bg-ink);
}

/* Layout Signature: asymmetric-editorial */
.hero-section {
    padding: 90px 0 60px;
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(0,0,0,0.05);
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    padding: 6px 14px;
    border-radius: 30px;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.hero-media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}

.hero-media img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Feature / Section Cards */
.section-block {
    padding: 80px 0;
}

.section-title {
    font-size: 2.1rem;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 50px;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.feature-card {
    background: #ffffff;
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(0,0,0,0.04);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.card-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 15px;
}

.feature-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

/* Contact Form & Flash */
.contact-section {
    background: var(--bg-ink);
    color: #ffffff;
    padding: 90px 0;
    border-radius: var(--radius-lg);
    margin: 60px auto;
}

.contact-section h2 {
    color: #ffffff;
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.contact-section p {
    color: rgba(255,255,255,0.8);
    text-align: center;
    margin-bottom: 40px;
}

.form-wrapper {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255,255,255,0.05);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.1);
}

.alert {
    padding: 15px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 25px;
    font-weight: 600;
}

.alert-success {
    background: #10b981;
    color: #ffffff;
}

.alert-error {
    background: #ef4444;
    color: #ffffff;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: rgba(255,255,255,0.9);
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.95);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.3);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    width: 100%;
    padding: 16px;
    background: var(--color-accent);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.3s ease;
}

.submit-btn:hover {
    background: var(--color-supporting);
}

/* WhatsApp & Footer */
.whatsapp-wrapper {
    text-align: center;
    margin-top: 30px;
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #25d366;
    color: #ffffff !important;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
}

.whatsapp-btn.disabled-demo {
    opacity: 0.6;
    cursor: not-allowed;
    background: #64748b;
}

.site-footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid rgba(0,0,0,0.06);
}

@media (max-width: 900px) {
    .hero-grid, .grid-3, .grid-2 {
        grid-template-columns: 1fr;
    }
    .hero-title {
        font-size: 2.1rem;
    }
    .form-wrapper {
        padding: 25px;
    }
}