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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(13, 148, 136, 0.15);
    color: #0f766e;
}

/* ── Hero Gradient ── */
.hero-gradient {
    background: linear-gradient(135deg, #042f2e 0%, #134e4a 25%, #0f766e 50%, #1e293b 75%, #020617 100%);
}

.hero-scrim {
    background: linear-gradient(to bottom, rgba(4, 47, 46, 0.4) 0%, rgba(4, 47, 46, 0.1) 50%, rgba(2, 6, 23, 0.7) 100%);
}

/* ── Hero Animations ── */
.hero-eyebrow {
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.3s;
    opacity: 0;
}

.hero-title {
    animation: fadeUp 0.9s ease forwards;
    animation-delay: 0.5s;
    opacity: 0;
}

.hero-subtitle {
    animation: fadeUp 0.9s ease forwards;
    animation-delay: 0.7s;
    opacity: 0;
}

.hero-cta {
    animation: fadeUp 0.9s ease forwards;
    animation-delay: 0.9s;
    opacity: 0;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Scroll Reveal ── */
.reveal-up {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-left {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-right {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal-up {
        opacity: 0;
        transform: translateY(32px);
    }
    
    .reveal-left {
        opacity: 0;
        transform: translateX(-32px);
    }
    
    .reveal-right {
        opacity: 0;
        transform: translateX(32px);
    }
}

.reveal-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ── Navbar ── */
#navbar {
    background: transparent;
}

#navbar.scrolled {
    background: rgba(248, 250, 252, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.nav-text-color {
    color: #1e293b;
}

#navbar:not(.scrolled) .nav-text-color {
    color: #f8fafc;
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #0d9488;
    transition: width 0.3s ease;
}

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

#navbar:not(.scrolled) .nav-link {
    color: rgba(248, 250, 252, 0.8);
}

#navbar:not(.scrolled) .nav-link:hover {
    color: #5eead4;
}

#navbar:not(.scrolled) .nav-line-1,
#navbar:not(.scrolled) .nav-line-2,
#navbar:not(.scrolled) .nav-line-3 {
    background: #f8fafc;
}

#navbar.scrolled .nav-line-1,
#navbar.scrolled .nav-line-2,
#navbar.scrolled .nav-line-3 {
    background: #1e293b;
}

/* ── Mobile Menu ── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

#mobile-menu.close {
    opacity: 0;
    pointer-events: none;
}

/* ── Smooth image loading ── */
img {
    loading: lazy;
    will-change: transform;
}

/* ── Focus styles ── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid #14b8a6;
    outline-offset: 2px;
}

/* ── Subtle hover on gallery images ── */
#gallery img {
    transition: opacity 0.5s ease, filter 0.5s ease;
}

#gallery img:hover {
    filter: brightness(0.92);
}

/* ── Custom select arrow ── */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='1.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0 center;
    background-size: 16px;
    padding-right: 2rem;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}