/* ============================================
   Ultama II Marine Division — Custom Styles
   Premium Dark Luxury Theme
   ============================================ */

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

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

body {
    overflow-x: hidden;
}

/* Selection color */
::selection {
    background: rgba(201, 168, 76, 0.3);
    color: #e8d5b7;
}

/* ============================================
   Navbar
   ============================================ */
.nav-header {
    background: transparent;
    transition: background 0.5s ease, box-shadow 0.5s ease, backdrop-filter 0.5s ease;
}

.nav-header.scrolled {
    background: rgba(10, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(201, 168, 76, 0.1), 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #c9a84c;
    transition: width 0.3s ease;
}

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

.nav-link:hover {
    color: #c9a84c !important;
}

/* Mobile menu open state */
.mobile-nav-link {
    position: relative;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
}

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

@media (prefers-reduced-motion: no-preference) {
    .js-enabled .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                    transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }

    /* Staggered delays */
    .reveal:nth-child(1) { transition-delay: 0.05s; }
    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.15s; }
    .reveal:nth-child(4) { transition-delay: 0.2s; }
    .reveal:nth-child(5) { transition-delay: 0.25s; }
    .reveal:nth-child(6) { transition-delay: 0.3s; }
    .reveal:nth-child(7) { transition-delay: 0.35s; }
    .reveal:nth-child(8) { transition-delay: 0.4s; }
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    transition: opacity 0.3s ease, transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(196, 97, 58, 0.4);
}

/* ============================================
   Form Styles
   ============================================ */
input:focus,
select:focus,
textarea:focus {
    outline: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23e8d5b7' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ============================================
   Focus visible for accessibility
   ============================================ */
:focus-visible {
    outline: 2px solid rgba(201, 168, 76, 0.6);
    outline-offset: 2px;
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #0a0f1a;
}

::-webkit-scrollbar-thumb {
    background: rgba(201, 168, 76, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(201, 168, 76, 0.5);
}

/* ============================================
   Responsive adjustments
   ============================================ */
@media (max-width: 639px) {
    .font-display {
        word-break: keep-all;
    }
}