/* ============================================
   THE SPARROW SUITE — Custom Styles
   Premium Dark Luxury Hotel
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-bg: #0a0f1a;
    --color-surface: #111827;
    --color-surface-light: #1a2332;
    --color-teal: #14b8a6;
    --color-teal-dark: #0d9488;
    --color-gold: #fbbf24;
    --color-gold-dim: #d97706;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-text-dim: #64748b;
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', system-ui, sans-serif;
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    margin: 0;
    overflow-x: hidden;
    background-color: var(--color-bg);
}

::selection {
    background-color: rgba(20, 184, 166, 0.3);
    color: #fff;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* --- Navbar --- */
#navbar {
    background: transparent;
    transition: background-color 0.4s var(--transition-smooth), backdrop-filter 0.4s var(--transition-smooth), box-shadow 0.4s var(--transition-smooth);
}

#navbar.scrolled {
    background: rgba(10, 15, 26, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-teal);
    transition: width 0.3s var(--transition-smooth);
}

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

/* --- Mobile Menu --- */
.menu-line {
    transition: transform 0.3s var(--transition-smooth), opacity 0.3s var(--transition-smooth);
}

#menuToggle.active .menu-line:nth-child(1) {
    transform: translateY(3px) rotate(45deg);
}

#menuToggle.active .menu-line:nth-child(2) {
    opacity: 0;
}

#menuToggle.active .menu-line:nth-child(3) {
    transform: translateY(-3px) rotate(-45deg);
    width: 1.5rem;
}

#mobileMenu.open {
    opacity: 1;
    pointer-events: all;
}

.mobile-link {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s var(--transition-smooth), transform 0.4s var(--transition-smooth);
}

#mobileMenu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobileMenu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobileMenu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobileMenu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobileMenu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
#mobileMenu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }

/* --- Hero Animations --- */
.hero-tag {
    animation: slideUp 0.8s var(--transition-smooth) 0.2s both;
}

.hero-headline {
    animation: slideUp 0.8s var(--transition-smooth) 0.4s both;
}

.hero-subtitle {
    animation: slideUp 0.8s var(--transition-smooth) 0.6s both;
}

.hero-cta {
    animation: slideUp 0.8s var(--transition-smooth) 0.8s both;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(60px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Scroll Indicator --- */
@keyframes scrollDot {
    0% { top: 0; opacity: 1; }
    50% { opacity: 0.5; }
    100% { top: 100%; opacity: 0; }
}

.scroll-dot {
    animation: scrollDot 1.5s ease-in-out infinite;
}

/* --- Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Room Cards --- */
.room-card {
    transform: translateY(0);
    transition: transform 0.5s var(--transition-smooth), box-shadow 0.5s var(--transition-smooth);
}

.room-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(20, 184, 166, 0.1);
}

/* --- Amenity Cards --- */
.amenity-card {
    transition: transform 0.5s var(--transition-smooth), border-color 0.5s var(--transition-smooth), box-shadow 0.5s var(--transition-smooth);
}

.amenity-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* --- Form Styles --- */
input[type="date"] {
    color: #fff;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.7) sepia(1) saturate(5) hue-rotate(160deg);
    cursor: pointer;
}

select option {
    background: #111827;
    color: #f1f5f9;
}

#submitBtn:active {
    transform: scale(0.98);
}

/* --- Parallax-like subtle effects --- */
.room-card img,
.amenity-card img {
    will-change: transform;
}

/* --- Gold accent line animation --- */
@keyframes goldShimmer {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

/* --- Responsive --- */
@media (max-width: 1023px) {
    .hero-headline {
        font-size: 3.5rem;
    }
}

@media (max-width: 767px) {
    .hero-headline {
        font-size: 2.75rem;
    }
    
    #hero {
        padding-top: 80px;
    }
}

/* --- Print --- */
@media print {
    body {
        background: #fff;
        color: #000;
    }
    
    .room-card, .amenity-card {
        break-inside: avoid;
    }
}