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

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

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(13, 148, 136, 0.3);
    color: #f1f5f9;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #0f172a;
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scrollLine {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
    51% {
        transform-origin: bottom;
    }
    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

.animate-scroll-line {
    animation: scrollLine 2s ease-in-out infinite;
}

/* Reveal animations */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger-children.revealed > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children.revealed > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children.revealed > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children.revealed > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-children.revealed > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-children.revealed > *:nth-child(6) { transition-delay: 0.6s; }

.stagger-children.revealed > * {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Navbar ===== */
#navbar {
    transition: background-color 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#navbar.scrolled {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05), 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: linear-gradient(135deg, #0d9488 0%, #0f766e 100%);
    color: #f1f5f9;
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.9375rem;
    font-weight: 500;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(13, 148, 136, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(13, 148, 136, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary.btn-large {
    padding: 18px 36px;
    font-size: 1rem;
    border-radius: 14px;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: transparent;
    color: #f1f5f9;
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.9375rem;
    font-weight: 500;
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
}

.btn-outline:hover {
    border-color: rgba(94, 234, 212, 0.5);
    background: rgba(94, 234, 212, 0.05);
    color: #5eead4;
    transform: translateY(-2px);
}

.btn-outline.btn-large {
    padding: 18px 36px;
    font-size: 1rem;
    border-radius: 14px;
}

/* ===== Room Cards ===== */
.room-card {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid rgba(51, 65, 85, 0.5);
    border-radius: 20px;
    padding: 8px;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.room-card:hover {
    border-color: rgba(13, 148, 136, 0.3);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(13, 148, 136, 0.1);
    transform: translateY(-4px);
}

/* ===== Tags ===== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: rgba(13, 148, 136, 0.1);
    border: 1px solid rgba(13, 148, 136, 0.2);
    border-radius: 100px;
    color: #5eead4;
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.01em;
}

/* ===== Amenity Cards ===== */
.amenity-card {
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.amenity-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

/* ===== Inputs ===== */
.input-field {
    width: 100%;
    padding: 14px 16px;
    background: rgba(15, 23, 42, 0.6);
    border: 1.5px solid rgba(51, 65, 85, 0.8);
    border-radius: 12px;
    color: #f1f5f9;
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.9375rem;
    transition: all 0.3s ease;
    outline: none;
}

.input-field::placeholder {
    color: #475569;
}

.input-field:hover {
    border-color: rgba(94, 234, 212, 0.3);
}

.input-field:focus {
    border-color: #0d9488;
    background: rgba(15, 23, 42, 0.8);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.input-field:focus ~ label,
.input-field:not(:placeholder-shown) ~ label {
    color: #5eead4;
}

textarea.input-field {
    resize: none;
}

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

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

/* ===== Nav Links ===== */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: #5eead4;
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ===== Mobile Links ===== */
.mobile-link {
    position: relative;
    transition: all 0.3s ease;
}

.mobile-link:hover {
    transform: scale(1.05);
}

/* ===== Menu Lines ===== */
.menu-line {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

#menu-toggle.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

#menu-toggle.active .menu-line:nth-child(3) {
    width: 24px;
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .font-serif {
        line-height: 1.15;
    }
}

/* ===== Prefers reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
    .reveal, .reveal-left, .reveal-right, .stagger-children > * {
        opacity: 1;
        transform: none;
    }
}