/* ========================================
   The Earth Rotates - 3D Multilingual Edition
   ======================================== */

:root {
    --bg: #000000;
    --text: #f5f3ef;
    --text-dim: #6a6a6a;
    --gold: #d4a84b;
    --gold-dim: rgba(212, 168, 75, 0.3);
    --accent: #e8d5b5;
    
    --font-display: 'Cormorant Garamond', serif;
    --font-body: 'Noto Sans KR', sans-serif;
}

body[data-lang="ja"] { --font-body: 'Noto Sans JP', sans-serif; }
body[data-lang="zh"] { --font-body: 'Noto Sans SC', sans-serif; }
body[data-lang="ar"] { --font-body: 'Noto Sans Arabic', sans-serif; }
body[data-lang="ko"] { --font-body: 'Noto Sans KR', sans-serif; }

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.8;
}

body[data-lang="ar"] {
    direction: rtl;
}

body[data-lang="ar"] .content {
    text-align: right;
}

body[data-lang="ar"] blockquote {
    padding-left: 0;
    padding-right: 20px;
    border-left: none;
    border-right: 2px solid var(--gold-dim);
}

body[data-lang="ar"] .nav-dots {
    right: auto;
    left: 40px;
}

body[data-lang="ar"] .progress-ring {
    right: auto;
    left: 40px;
}

::selection {
    background: var(--gold);
    color: var(--bg);
}

/* ========================================
   Planet Labels
   ======================================== */
#planet-labels {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 50;
}

.planet-label {
    position: absolute;
    padding: 4px 10px;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--gold-dim);
    border-radius: 12px;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--gold);
    white-space: nowrap;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.planet-label.visible {
    opacity: 1;
}

.planet-label.earth-label {
    border-color: #00d4aa;
    color: #00d4aa;
}

.planet-label.sun-label {
    border-color: #ffd700;
    color: #ffd700;
    font-size: 0.8rem;
}

.planet-label::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 5px;
    background: var(--gold-dim);
}

.planet-label.sun-label::after {
    background: #ffd700;
}

.planet-label.earth-label::after {
    background: #00d4aa;
}

/* ========================================
   Language Selector
   ======================================== */
.lang-selector {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 5px;
    z-index: 1000;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(212, 168, 75, 0.2);
    border-radius: 30px;
}

.lang-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 20px;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    color: var(--text);
    border-color: var(--gold-dim);
}

.lang-btn.active {
    color: var(--gold);
    border-color: var(--gold);
    background: rgba(212, 168, 75, 0.1);
}

/* ========================================
   Three.js Container
   ======================================== */
#three-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#three-container canvas {
    display: block;
}

/* ========================================
   Progress Ring
   ======================================== */
.progress-ring {
    position: fixed;
    top: 40px;
    right: 40px;
    width: 60px;
    height: 60px;
    z-index: 100;
    opacity: 0;
    animation: fadeIn 1s 1s forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.progress-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring circle {
    fill: none;
    stroke-width: 1;
}

.progress-ring .bg {
    stroke: var(--gold-dim);
}

.progress-ring .fill {
    stroke: var(--gold);
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 0.5s ease;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--gold);
    letter-spacing: 0.1em;
}

/* ========================================
   Scene Label
   ======================================== */
.scene-label {
    position: fixed;
    bottom: 40px;
    left: 40px;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.4em;
    color: var(--gold-dim);
    text-transform: uppercase;
    z-index: 100;
    opacity: 0;
    animation: fadeIn 1s 1.5s forwards;
}

/* ========================================
   Navigation Dots
   ======================================== */
.nav-dots {
    position: fixed;
    right: 40px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 100;
    opacity: 0;
    animation: fadeIn 1s 1.2s forwards;
}

.dot {
    width: 8px;
    height: 8px;
    border: 1px solid var(--gold-dim);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dot:hover {
    border-color: var(--gold);
    transform: scale(1.3);
}

.dot.active {
    background: var(--gold);
    border-color: var(--gold);
    box-shadow: 0 0 20px var(--gold-dim);
}

/* ========================================
   Main Content
   ======================================== */
main {
    position: relative;
    z-index: 1;
    pointer-events: none;
}

.section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 80px;
    position: relative;
    pointer-events: auto;
}

/* ========================================
   Content
   ======================================== */
.content {
    max-width: 550px;
    padding: 40px;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(212, 168, 75, 0.1);
    border-radius: 4px;
}

.content.center {
    text-align: center;
    max-width: 650px;
    margin: 0 auto;
}

.part-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 15px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s ease;
}

.section.visible .part-label {
    opacity: 1;
    transform: translateY(0);
}

.era {
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 20px;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.section.visible .era {
    opacity: 1;
}

h1 {
    margin-bottom: 25px;
}

h1 .line {
    display: block;
    font-weight: 200;
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.2;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

h1 .line:nth-child(2) {
    transition-delay: 0.1s;
}

.section.visible h1 .line {
    opacity: 1;
    transform: translateY(0);
}

h1 .accent {
    font-weight: 600;
    color: var(--gold);
    font-size: clamp(3rem, 8vw, 6rem);
    text-shadow: 0 0 60px rgba(212, 168, 75, 0.3);
}

h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 300;
    margin-bottom: 10px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s ease 0.1s;
}

.section.visible h2 {
    opacity: 1;
    transform: translateY(0);
}

.period {
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 25px;
    opacity: 0;
    transition: opacity 0.8s ease 0.2s;
}

.section.visible .period {
    opacity: 1;
}

blockquote {
    font-family: var(--font-display);
    font-size: clamp(1rem, 1.8vw, 1.3rem);
    font-style: italic;
    color: var(--accent);
    margin: 25px 0;
    padding-left: 20px;
    border-left: 2px solid var(--gold-dim);
    opacity: 0;
    transform: translateX(-15px);
    transition: all 0.8s ease 0.3s;
}

.section.visible blockquote {
    opacity: 1;
    transform: translateX(0);
}

.subtitle {
    font-family: var(--font-display);
    font-size: 1rem;
    font-style: italic;
    color: var(--text-dim);
    opacity: 0;
    transition: opacity 0.8s ease 0.4s;
}

.section.visible .subtitle {
    opacity: 1;
}

.desc {
    font-size: 0.9rem;
    font-weight: 300;
    line-height: 2;
    color: var(--text-dim);
    opacity: 0;
    transform: translateY(15px);
    transition: all 0.8s ease 0.4s;
}

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

/* ========================================
   Finale
   ======================================== */
.finale {
    justify-content: center;
}

.finale .content {
    background: rgba(0, 0, 0, 0.6);
}

.finale-quote {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 3vw, 2.2rem);
    font-style: italic;
    color: var(--text);
    margin-bottom: 15px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 1s ease 0.2s;
}

.section.finale.visible .finale-quote {
    opacity: 1;
    transform: translateY(0);
}

.finale-attr {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    opacity: 0;
    transition: opacity 1s ease 0.5s;
}

.section.finale.visible .finale-attr {
    opacity: 1;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
    .lang-selector {
        top: 15px;
        padding: 6px 8px;
        gap: 3px;
        flex-wrap: wrap;
        max-width: 90%;
        justify-content: center;
    }
    
    .lang-btn {
        padding: 5px 8px;
        font-size: 0.65rem;
    }
    
    .section {
        padding: 100px 20px 80px;
        justify-content: center;
    }
    
    .content {
        padding: 25px;
        max-width: 100%;
    }
    
    .nav-dots {
        right: 15px;
        gap: 12px;
    }
    
    body[data-lang="ar"] .nav-dots {
        left: 15px;
    }
    
    .dot {
        width: 6px;
        height: 6px;
    }
    
    .progress-ring {
        top: 70px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
    
    body[data-lang="ar"] .progress-ring {
        left: 20px;
    }
    
    .scene-label {
        bottom: 20px;
        left: 20px;
        font-size: 0.6rem;
    }
    
    blockquote {
        padding-left: 15px;
        font-size: 1rem;
    }
    
    body[data-lang="ar"] blockquote {
        padding-right: 15px;
    }
    
    .planet-label {
        font-size: 0.6rem;
        padding: 3px 8px;
    }
}

/* ========================================
   Scrollbar
   ======================================== */
::-webkit-scrollbar {
    width: 3px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--gold-dim);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gold);
}