/* ==========================================================================
   REALSTADE 3D - Premium Scroll Animation Stylesheet
   ========================================================================== */

/* Imports */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;700&family=Syne:wght@700;800&display=swap');

/* Variables & Custom Properties */
:root {
    --color-bg: #070708;
    --color-bg-card: rgba(15, 15, 18, 0.65);
    --color-primary: #FACC15;
    /* Vibrant Gold Yellow */
    --color-primary-glow: rgba(250, 204, 21, 0.45);
    --color-primary-dim: rgba(250, 204, 21, 0.15);
    --color-text: #F3F4F6;
    --color-text-muted: #9CA3AF;
    --font-heading: 'Syne', sans-serif;
    --font-body: 'Outfit', sans-serif;
    --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-snappy: all 0.3s ease;
    --border-glass: 1px solid rgba(250, 204, 21, 0.15);
    --border-glass-hover: 1px solid rgba(250, 204, 21, 0.4);
}

/* Base resets & Custom scrollbar */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--color-bg);
    background-color: var(--color-bg);
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-weight: 400;
    overflow-x: hidden;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary-dim);
    border-radius: 3px;
    border: 1px solid rgba(250, 204, 21, 0.05);
    transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
    box-shadow: 0 0 10px var(--color-primary-glow);
}

/* Custom Cursor */
.custom-cursor {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    position: fixed;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 10000;
    transition: width 0.3s, height 0.3s, background-color 0.3s, border-color 0.3s;
    transition-timing-function: cubic-bezier(0.19, 1, 0.22, 1);
    display: none;
    /* Handled in JS for presence */
}

.custom-cursor-dot {
    width: 4px;
    height: 4px;
    background-color: var(--color-primary);
    border-radius: 50%;
    position: fixed;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 10000;
    display: none;
}

.custom-cursor.hovered {
    width: 45px;
    height: 45px;
    background-color: rgba(250, 204, 21, 0.1);
    border-color: var(--color-primary);
}

.custom-cursor.dragging {
    width: 35px;
    height: 35px;
    border-style: dashed;
    animation: cursorRotate 8s linear infinite;
}

@keyframes cursorRotate {
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Preloader Overlay */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--color-bg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), visibility 1s;
}

.preloader-circle-wrapper {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
}

.preloader-svg {
    position: absolute;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.preloader-svg-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.03);
    stroke-width: 3;
}

.preloader-svg-bar {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    /* 2 * PI * r (r=90) */
    stroke-dashoffset: 565.48;
    transition: stroke-dashoffset 0.1s ease;
    filter: drop-shadow(0 0 8px var(--color-primary-glow));
}

.preloader-text-wrapper {
    text-align: center;
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.preloader-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.35em;
    color: #FFFFFF;
    text-transform: uppercase;
    margin-bottom: 0.3rem;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.preloader-percentage {
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--color-primary);
    font-family: var(--font-body);
    letter-spacing: 0.05em;
    text-shadow: 0 0 15px var(--color-primary-glow);
}

.preloader-loading-tip {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    animation: pulse 1.8s infinite ease-in-out;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.4;
    }

    50% {
        opacity: 1;
    }
}

/* Background Gradients */
.ambient-glow {
    position: fixed;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(250, 204, 21, 0.06) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
    transform: translate(-50%, -50%);
}

.ambient-glow-1 {
    top: 20%;
    left: 80%;
}

.ambient-glow-2 {
    top: 80%;
    left: 15%;
}

/* Scroll Setup & Sticky Canvas */
.scroll-container {
    position: relative;
    width: 100%;
    z-index: 2;
}

.canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    /* Use --vh variable for accurate mobile viewport (avoids URL-bar overflow) */
    height: 100vh;
    height: calc(var(--vh, 1vh) * 100);
    z-index: 1;
    overflow: hidden;
    background-color: var(--color-bg);
}

canvas#3d-canvas {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform-origin: center center;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.canvas-container.dragging canvas {
    cursor: grabbing;
}

/* Overlay Scroll Sections */
.scroll-sections {
    position: relative;
    z-index: 3;
    width: 100%;
}

.section {
    position: relative;
    width: 100%;
    height: 100vh;
    height: calc(var(--vh, 1vh) * 100);
    display: flex;
    align-items: center;
    padding: 0 8vw;
    pointer-events: none;
}

/* Make inner cards interactive again */
.section-content {
    pointer-events: auto;
    width: 100%;
    max-width: 520px;
    z-index: 4;
}

.content-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: var(--border-glass);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.4),
        inset 0 1px 1px rgba(255, 255, 255, 0.05);
    transform: translateY(40px) scale(0.98);
    opacity: 0;
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1),
        opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1),
        border-color 0.4s ease,
        box-shadow 0.4s ease;
}

.content-card:hover {
    border: var(--border-glass-hover);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5),
        0 0 25px rgba(250, 204, 21, 0.08),
        inset 0 1px 2px rgba(255, 255, 255, 0.1);
}

/* Visibility triggers via JS class toggles */
.section.active .content-card {
    transform: translateY(0) scale(1);
    opacity: 1;
}

/* Hero Section Specifics (Section 1) */
.section-hero {
    justify-content: flex-start;
    height: 100vh;
    height: calc(var(--vh, 1vh) * 100);
}

.hero-card {
    background: transparent;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 0;
    max-width: 750px;
    opacity: 1;
    /* Always visible to prevent flash */
    transform: none;
}

.hero-tag {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4em;
    color: var(--color-primary);
    margin-bottom: 1.2rem;
    display: inline-block;
    position: relative;
    padding-left: 30px;
    text-shadow: 0 0 10px rgba(250, 204, 21, 0.2);
}

.hero-tag::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 2px;
    background-color: var(--color-primary);
    box-shadow: 0 0 6px var(--color-primary);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 900;
    line-height: 0.95;
    text-transform: uppercase;
    color: #FFFFFF;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.hero-title span {
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(255, 255, 255, 0.85);
    background: linear-gradient(135deg, #FFF 40%, var(--color-primary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    display: block;
}

.hero-title .yellow-fill {
    color: var(--color-primary);
    -webkit-text-stroke: none;
    text-shadow: 0 0 40px rgba(250, 204, 21, 0.2);
}

.hero-description {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    max-width: 500px;
    margin-bottom: 2.5rem;
}

.hero-cta-group {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

/* Button & Link styles */
.btn-primary {
    background-color: var(--color-primary);
    color: #000000;
    padding: 1rem 2.2rem;
    border-radius: 30px;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    box-shadow: 0 10px 25px rgba(250, 204, 21, 0.25);
    transition: var(--transition-snappy);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.4) 50%, rgba(255, 255, 255, 0) 100%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
    z-index: -1;
}

.btn-primary:hover::before {
    transform: translateX(100%);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px var(--color-primary-glow);
    background-color: #FFFFFF;
}

.btn-secondary {
    background: transparent;
    color: #FFFFFF;
    padding: 1rem 2rem;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border: 1px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: var(--transition-snappy);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: 0 0 15px var(--color-primary-dim);
}

/* Content cards layout variants */
.section-left {
    justify-content: flex-start;
}

.section-right {
    justify-content: flex-end;
}

.section-center {
    justify-content: center;
}

.section-number {
    font-family: var(--font-heading);
    font-size: 4.5rem;
    font-weight: 800;
    color: var(--color-primary-dim);
    line-height: 1;
    margin-bottom: 0.5rem;
    -webkit-text-stroke: 1px rgba(250, 204, 21, 0.25);
    text-shadow: 0 0 20px rgba(250, 204, 21, 0.05);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: #FFFFFF;
    margin-bottom: 1.2rem;
    text-transform: uppercase;
    letter-spacing: -0.01em;
}

.section-title span {
    color: var(--color-primary);
}

.section-text {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* Specs / Feature Badges inside cards */
.spec-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
}

.spec-item {
    border-left: 2px solid var(--color-primary);
    padding-left: 0.8rem;
}

.spec-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    margin-bottom: 0.2rem;
}

.spec-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: #FFFFFF;
}

.spec-value span {
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 400;
    margin-left: 2px;
}

/* Top Navigation Bar */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 4vw;
    /* Extra padding for devices with notch (safe-area-inset) */
    padding-top: max(2rem, calc(2rem + env(safe-area-inset-top)));
    padding-left: max(4vw, env(safe-area-inset-left));
    padding-right: max(4vw, env(safe-area-inset-right));
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    pointer-events: none;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 0.2em;
    color: #FFFFFF;
    text-decoration: none;
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--color-primary);
}

.logo-dot {
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px var(--color-primary);
}

.nav-right {
    pointer-events: auto;
}

.btn-book-nav {
    background: var(--color-bg-card);
    backdrop-filter: blur(8px);
    border: var(--border-glass);
    color: var(--color-primary);
    padding: 0.7rem 1.6rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition-snappy);
}

.btn-book-nav:hover {
    background: var(--color-primary);
    color: #000000;
    box-shadow: 0 0 15px var(--color-primary-glow);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

/* Sidebar Dots Navigation */
.side-nav {
    position: fixed;
    right: 3vw;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

.side-nav-item {
    position: relative;
    width: 14px;
    height: 14px;
    cursor: pointer;
}

.side-nav-circle {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background-color: transparent;
    transition: var(--transition-snappy);
    display: flex;
    justify-content: center;
    align-items: center;
}

.side-nav-circle::after {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: #FFFFFF;
    opacity: 0.5;
    transition: var(--transition-snappy);
}

.side-nav-item:hover .side-nav-circle {
    border-color: var(--color-primary);
    box-shadow: 0 0 8px var(--color-primary-dim);
}

.side-nav-item:hover .side-nav-circle::after {
    background-color: var(--color-primary);
    opacity: 1;
}

.side-nav-item.active .side-nav-circle {
    border-color: var(--color-primary);
    box-shadow: 0 0 10px var(--color-primary-glow);
    background-color: var(--color-primary-dim);
}

.side-nav-item.active .side-nav-circle::after {
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    opacity: 1;
    box-shadow: 0 0 5px var(--color-primary);
}

.side-nav-tooltip {
    position: absolute;
    right: 200%;
    top: 50%;
    transform: translateY(-50%) translateX(10px);
    background: var(--color-bg-card);
    backdrop-filter: blur(8px);
    border: var(--border-glass);
    padding: 0.4rem 0.8rem;
    border-radius: 5px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #FFFFFF;
    pointer-events: none;
    opacity: 0;
    white-space: nowrap;
    transition: var(--transition-snappy);
}

.side-nav-tooltip::after {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: transparent transparent transparent rgba(15, 15, 18, 0.65);
}

.side-nav-item:hover .side-nav-tooltip {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}

/* Floating Interactive Control Panel */
.control-panel {
    position: fixed;
    bottom: 3.5vh;
    left: 4vw;
    /* Safe area for iPhone home bar */
    bottom: max(3.5vh, calc(1.5vh + env(safe-area-inset-bottom)));
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--color-bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: var(--border-glass);
    border-radius: 30px;
    padding: 0.6rem 1.2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    pointer-events: auto;
    transition: var(--transition-smooth);
}

.control-panel:hover {
    border-color: rgba(250, 204, 21, 0.3);
    box-shadow: 0 10px 35px rgba(250, 204, 21, 0.05);
}

.control-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.04);
    color: #FFFFFF;
    transition: var(--transition-snappy);
}

.control-btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.control-btn:hover {
    background-color: var(--color-primary);
    color: #000000;
    box-shadow: 0 0 10px var(--color-primary-glow);
}

.control-btn.active {
    background-color: var(--color-primary);
    color: #000000;
    box-shadow: 0 0 15px var(--color-primary-glow);
}

.control-divider {
    width: 1px;
    height: 24px;
    background-color: rgba(255, 255, 255, 0.1);
}

.control-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.control-panel.active-drag .control-label {
    color: var(--color-primary);
    animation: pulse 1.5s infinite;
}

/* Scroll Progress Bar (Top) */
.scroll-progress-line {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary) 0%, #FFF7ED 100%);
    box-shadow: 0 0 10px var(--color-primary-glow);
    z-index: 1000;
    transition: width 0.1s ease-out;
}

/* Custom Scroll Down Tip */
.scroll-tip {
    position: fixed;
    bottom: 3.5vh;
    right: 4vw;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
    z-index: 100;
    pointer-events: none;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    transition: opacity 0.5s ease;
}

.scroll-tip-mouse {
    width: 20px;
    height: 32px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    position: relative;
}

.scroll-tip-wheel {
    width: 2px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 1px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: wheelScroll 1.5s infinite ease-out;
    box-shadow: 0 0 4px var(--color-primary);
}

@keyframes wheelScroll {
    0% {
        top: 6px;
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        top: 18px;
        opacity: 0;
    }
}

/* ===================================================
   RESPONSIVE — Full Breakpoint Coverage
   =================================================== */

/* --- 2K / 4K Large Screens (1600px+) --- */
@media (min-width: 1600px) {
    .section {
        padding: 0 10vw;
    }

    .section-content {
        max-width: 580px;
    }

    .hero-title {
        font-size: clamp(4rem, 6vw, 7rem);
    }

    .hero-description {
        font-size: 1.25rem;
        max-width: 560px;
    }

    .content-card {
        padding: 3rem;
    }

    .section-title {
        font-size: 2.6rem;
    }

    .section-text {
        font-size: 1.1rem;
    }

    .logo {
        font-size: 1.7rem;
    }

    header {
        padding: 2.5rem 5vw;
    }
}

/* --- Standard Desktop (1280px–1599px) — already base styles --- */

/* --- Small Desktop / Large Laptop (1025px–1279px) --- */
@media (max-width: 1279px) and (min-width: 1025px) {
    .section {
        padding: 0 6vw;
    }

    .section-content {
        max-width: 490px;
    }

    .hero-title {
        font-size: clamp(2.8rem, 6vw, 5rem);
    }

    .side-nav {
        right: 2vw;
    }
}

/* --- Tablet Landscape + Small Desktop (769px–1024px) --- */
@media (max-width: 1024px) {
    .section {
        padding: 0 5vw;
    }

    .section-content {
        max-width: 460px;
    }

    .section-title {
        font-size: 1.9rem;
    }

    .section-number {
        font-size: 3.5rem;
    }

    .hero-title {
        font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    }

    .hero-description {
        font-size: 1.05rem;
        max-width: 440px;
    }

    .side-nav {
        right: 2vw;
        gap: 1.4rem;
    }

    .control-panel {
        gap: 1rem;
        padding: 0.5rem 1rem;
    }
}

/* --- Tablet Portrait (600px–768px) --- */
@media (max-width: 768px) {

    /* Header */
    header {
        padding: 1.2rem 5vw;
    }

    .logo {
        font-size: 1.2rem;
        letter-spacing: 0.12em;
    }

    .btn-book-nav {
        font-size: 0.65rem;
        padding: 0.55rem 1rem;
        letter-spacing: 0.08em;
    }

    /* Side Navigation — hidden on mobile */
    .side-nav {
        display: none;
    }

    /* Sections — center-aligned cards */
    .section {
        justify-content: center !important;
        padding: 0 4vw;
        align-items: flex-end;
        padding-bottom: 12vh;
    }

    .section-hero {
        align-items: center;
        padding-bottom: 0;
    }

    .section-content {
        max-width: 100%;
    }

    /* Hero Text */
    .hero-card {
        padding: 0 1rem;
    }

    .hero-tag {
        font-size: 0.75rem;
        letter-spacing: 0.25em;
    }

    .hero-title {
        font-size: clamp(2.2rem, 9vw, 3.5rem);
        line-height: 1.0;
        margin-bottom: 1.4rem;
    }

    .hero-description {
        font-size: 0.95rem;
        max-width: 100%;
        margin-bottom: 1.8rem;
    }

    .hero-cta-group {
        flex-direction: column;
        align-items: stretch;
        gap: 0.8rem;
    }

    .btn-primary,
    .btn-secondary {
        text-align: center;
        padding: 0.85rem 1.5rem;
        font-size: 0.8rem;
    }

    /* Content cards */
    .content-card {
        padding: 1.6rem;
        border-radius: 16px;
    }

    .section-number {
        font-size: 3rem;
        margin-bottom: 0.3rem;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 0.8rem;
    }

    .section-text {
        font-size: 0.9rem;
        margin-bottom: 1.4rem;
    }

    .spec-grid {
        gap: 0.8rem;
    }

    .spec-value {
        font-size: 1rem;
    }

    /* Control Panel — centered at bottom */
    .control-panel {
        left: 50%;
        transform: translateX(-50%);
        bottom: 2vh;
        width: calc(100% - 2rem);
        max-width: 360px;
        justify-content: space-between;
        gap: 0.8rem;
        padding: 0.5rem 1rem;
    }

    .control-label {
        font-size: 0.6rem;
        letter-spacing: 0.08em;
    }

    .control-btn {
        width: 34px;
        height: 34px;
    }

    .control-btn svg {
        width: 15px;
        height: 15px;
    }

    /* Hide scroll tip & cursor on touch devices */
    .scroll-tip {
        display: none;
    }

    .custom-cursor,
    .custom-cursor-dot {
        display: none !important;
    }

    /* Ambient glow repositioning */
    .ambient-glow-1 {
        top: 10%;
        left: 90%;
    }

    .ambient-glow-2 {
        top: 90%;
        left: 5%;
    }
}

/* --- Mobile Portrait (≤599px) --- */
@media (max-width: 599px) {
    header {
        padding: 1rem 4vw;
    }

    .logo {
        font-size: 1.1rem;
        letter-spacing: 0.1em;
    }

    .btn-book-nav {
        display: none;
        /* Free space on tiny screens */
    }

    .section {
        padding: 0 3.5vw;
        padding-bottom: 14vh;
    }

    .section-hero {
        padding-bottom: 0;
    }

    .hero-card {
        padding: 0 0.5rem;
    }

    .hero-title {
        font-size: clamp(0.9rem, 9vw, 1.8rem);
        line-height: 1.05;
    }

    .hero-tag {
        font-size: 0.68rem;
        letter-spacing: 0.2em;
        padding-left: 22px;
    }

    .hero-tag::before {
        width: 12px;
    }

    .hero-description {
        font-size: 0.88rem;
        line-height: 1.55;
        margin-bottom: 1.4rem;
    }

    .content-card {
        padding: 1.3rem;
        border-radius: 14px;
    }

    .section-number {
        font-size: 2.4rem;
    }

    .section-title {
        font-size: 1.35rem;
        margin-bottom: 0.65rem;
    }

    .section-text {
        font-size: 0.85rem;
        margin-bottom: 1.2rem;
    }

    .spec-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.7rem;
    }

    .spec-label {
        font-size: 0.65rem;
    }

    .spec-value {
        font-size: 0.95rem;
    }

    .control-panel {
        max-width: calc(100% - 1.5rem);
        bottom: 1.5vh;
        padding: 0.4rem 0.8rem;
    }

    .control-label {
        font-size: 0.55rem;
    }

    .control-btn {
        width: 30px;
        height: 30px;
    }

    .control-divider {
        height: 18px;
    }

    /* Preloader adjustments */
    .preloader-circle-wrapper {
        width: 160px;
        height: 160px;
    }

    .preloader-title {
        font-size: 0.95rem;
        letter-spacing: 0.25em;
    }

    .preloader-percentage {
        font-size: 1.4rem;
    }

    .preloader-loading-tip {
        font-size: 0.62rem;
        letter-spacing: 0.12em;
        text-align: center;
        padding: 0 1rem;
    }
}

/* --- Very Small Mobile (≤375px — iPhone SE, Galaxy A series) --- */
@media (max-width: 375px) {
    .hero-title {
        font-size: clamp(1.6rem, 11vw, 2.4rem);
    }

    .section-title {
        font-size: 1.2rem;
    }

    .section-number {
        font-size: 2rem;
    }

    .content-card {
        padding: 1.1rem;
    }

    .spec-grid {
        grid-template-columns: 1fr;
    }

    .control-label {
        display: none;
        /* Conserve space on the tiniest phones */
    }

    .control-panel {
        gap: 0.5rem;
    }
}

/* --- Landscape Mobile (height ≤ 500px) --- */
@media (max-height: 500px) and (orientation: landscape) {
    .section {
        height: auto;
        min-height: 100vh;
        padding-top: 80px;
        padding-bottom: 80px;
        align-items: center;
    }

    .section-hero {
        min-height: 100vh;
        padding-top: 70px;
        padding-bottom: 70px;
    }

    .hero-title {
        font-size: clamp(1.5rem, 5vw, 2.5rem);
        margin-bottom: 0.8rem;
    }

    .hero-description {
        font-size: 0.82rem;
        margin-bottom: 1rem;
    }

    .content-card {
        padding: 1rem 1.3rem;
    }

    .section-number {
        font-size: 2rem;
        margin-bottom: 0.2rem;
    }

    .section-title {
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
    }

    .section-text {
        font-size: 0.8rem;
        margin-bottom: 0.8rem;
    }

    .spec-grid {
        gap: 0.6rem;
    }

    .control-panel {
        bottom: 1vh;
    }

    header {
        padding: 0.8rem 4vw;
    }

    .side-nav {
        display: none;
    }
}

/* --- High-DPI / Retina screens --- */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {

    .logo-dot,
    .preloader-svg-bar {
        /* Already vector, just ensure crisp rendering */
        shape-rendering: geometricPrecision;
    }
}