/* Font smoothing */
* { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-feature-settings: 'kern'; letter-spacing: -0.1px; }

/* Smooth scrolling */
html { scroll-behavior: smooth; scroll-padding-top: 80px; }

/* Pulse ring animation for hero */
@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 0.4; }
    100% { transform: scale(1.8); opacity: 0; }
}
@keyframes pulse-ring-slow {
    0% { transform: scale(1); opacity: 0.25; }
    100% { transform: scale(2.2); opacity: 0; }
}
.pulse-ring { animation: pulse-ring 3s cubic-bezier(0.215, 0.61, 0.355, 1) infinite; }
.pulse-ring-slow { animation: pulse-ring-slow 4s cubic-bezier(0.215, 0.61, 0.355, 1) infinite; animation-delay: 0.8s; }

/* Scroll-triggered reveal */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered children */
.reveal-children > * {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-children.visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-children.visible > *:nth-child(2) { transition-delay: 0.08s; }
.reveal-children.visible > *:nth-child(3) { transition-delay: 0.16s; }
.reveal-children.visible > *:nth-child(4) { transition-delay: 0.24s; }
.reveal-children.visible > *:nth-child(5) { transition-delay: 0.32s; }
.reveal-children.visible > *:nth-child(6) { transition-delay: 0.4s; }
.reveal-children.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* Gradient text on dark bg */
.gradient-text-light {
    background: linear-gradient(135deg, #0FA3B1 0%, #5ec4ce 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Nav glass — starts dark, transitions to light on scroll */
.nav-glass {
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: rgba(15, 30, 51, 0.6);
    transition: background 0.4s ease, border-color 0.4s ease;
}
.nav-glass.nav-scrolled {
    background: rgba(255, 255, 255, 0.88);
}

/* Diagonal accent stripe (dark variant) */
.stripe-accent {
    background: repeating-linear-gradient(
        -45deg,
        transparent,
        transparent 8px,
        rgba(15, 163, 177, 0.03) 8px,
        rgba(15, 163, 177, 0.03) 16px
    );
}

/* Service card hover */
.service-card {
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.service-card:hover {
    transform: translateY(-6px);
    box-shadow: 0px 20px 50px 0px rgba(15, 30, 51, 0.14);
}

/* Mobile menu */
.mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-menu.open {
    max-height: 400px;
}

/* Grain overlay */
.grain::after {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.03;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 128px;
}

/* Language toggle */
.lang-toggle {
    transition: all 0.2s ease;
}
.lang-toggle:hover {
    background: rgba(255,255,255,0.15);
}
.nav-scrolled .lang-toggle:hover {
    background: rgba(15, 30, 51, 0.06);
}

/* Welcome overlay */
.welcome-overlay {
    transition: opacity 0.4s ease;
}
.welcome-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}
.welcome-step {
    display: none;
    animation: fadeUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.welcome-step.active {
    display: block;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Cookie banner */
.cookie-banner {
    transform: translateY(100%);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.cookie-banner.visible {
    transform: translateY(0);
}

/* Focus-visible for keyboard accessibility */
a:focus-visible, button:focus-visible { outline: 2px solid #0FA3B1; outline-offset: 2px; border-radius: 4px; }