:root {
    --primary-color: #333;
    --secondary-color: #666;
    --accent-color: #8b7355;
    --bg-color: #f9f9f9;
    --card-bg: #ffffff;
    --text-color: #1a1a1a;
    --border-color: #ddd;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* ========== Intro Overlay ========== */
.intro-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: white; display: flex; justify-content: center; align-items: center;
    z-index: 9999;
    animation: overlayFadeOut 0.4s ease-out 1.7s forwards;
}
.intro-overlay.hidden { display: none; }
.intro-logo {
    width: 300px; height: auto; position: absolute; top: 50%; left: 50%;
    will-change: transform, opacity;
    animation: logoShrinkMove 1.8s ease-in-out forwards;
}
@keyframes logoShrinkMove {
    0% { opacity: 0; transform: translate(-50%, -50%) scale(1.5); }
    20% { opacity: 1; transform: translate(-50%, -50%) scale(1.5); }
    45% { opacity: 1; transform: translate(-50%, -50%) scale(1.5); }
    100% { opacity: 1; transform: translate(-50%, calc(-50vh + 55px)) scale(0.67); }
}
@keyframes overlayFadeOut {
    0% { opacity: 1; }
    100% { opacity: 0; visibility: hidden; pointer-events: none; }
}

/* ========== Login Section ========== */
.login-section {
    display: flex; justify-content: center; align-items: center;
    min-height: 100vh; padding: 20px; background: var(--bg-color);
}
.login-card {
    background: white; border-radius: 20px; padding: 48px 32px; max-width: 420px; width: 100%;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06); text-align: center;
}
.login-logo { width: 180px; height: auto; margin-bottom: 24px; }
.login-title { font-size: 20px; font-weight: 600; color: var(--primary-color); margin-bottom: 8px; }
.login-desc { font-size: 14px; color: var(--secondary-color); margin-bottom: 24px; line-height: 1.5; }
.lang-selector {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    margin-bottom: 24px; font-size: 13px; color: var(--secondary-color);
}
.lang-selector select {
    padding: 6px 12px; border: 1px solid var(--border-color); border-radius: 8px;
    font-size: 13px; background: white; color: var(--text-color); cursor: pointer;
}
.login-form { text-align: left; }
.login-field { margin-bottom: 16px; }
.login-label { display: block; font-size: 13px; font-weight: 500; color: var(--primary-color); margin-bottom: 6px; }
.login-input {
    width: 100%; padding: 12px 16px; border: 1px solid var(--border-color);
    border-radius: 10px; font-size: 15px; font-family: var(--font-main);
    transition: border-color 0.2s;
}
.login-input:focus { outline: none; border-color: var(--accent-color); }
.login-error { color: #e74c3c; font-size: 13px; min-height: 20px; margin: 8px 0; text-align: center; }
.login-btn {
    width: 100%; padding: 14px; border: none; border-radius: 12px;
    background: var(--text-color); color: white; font-size: 15px; font-weight: 600;
    cursor: pointer; transition: opacity 0.2s; font-family: var(--font-main);
}
.login-btn:hover { opacity: 0.85; }
.login-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== Result Container ========== */
.result-container {
    max-width: 500px; margin: 0 auto; background: white;
    min-height: 100vh; overflow: hidden;
}

/* ========== Logo & Header ========== */
.prev-logo-intro { display: flex; justify-content: center; padding: 60px 40px 30px; }
.prev-logo-img { max-width: 200px; height: auto; }
.prev-header { padding: 10px 30px 20px; text-align: center; }
.prev-logo-text { font-size: 18px; font-weight: 700; letter-spacing: 3px; color: var(--primary-color); }
.prev-main-illust { display: flex; justify-content: center; padding: 10px 30px 20px; }
.prev-illust-img { max-width: 250px; height: auto; }

/* ========== Navigation ========== */
.prev-nav-section { padding: 30px 20px; text-align: center; }
.prev-customer-title { font-size: 16px; font-weight: 500; margin-bottom: 20px; color: var(--primary-color); }
.prev-nav-buttons { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.prev-nav-btn {
    padding: 8px 20px; border-radius: 20px; background: white;
    border: 1px solid var(--border-color); font-size: 13px; color: var(--secondary-color);
    cursor: pointer; transition: all 0.2s;
}
.prev-nav-btn:hover { border-color: var(--accent-color); color: var(--accent-color); background: #fdf8f5; }

/* ========== Section Title ========== */
.prev-section-title {
    padding: 40px 20px 15px; text-align: center;
    border-top: 6px solid var(--bg-color); margin-top: 10px;
}
.prev-sec-h2 { font-size: 20px; font-weight: 700; color: var(--primary-color); }
.prev-sec-sub { font-size: 12px; color: #aaa; margin-top: 4px; letter-spacing: 1px; }

/* ========== Mid Section ========== */
.prev-mid-section { padding: 25px 20px 8px; text-align: center; }
.prev-mid-h3 { font-size: 15px; font-weight: 600; color: var(--primary-color); }
.prev-mid-sub { font-size: 11px; color: #bbb; margin-top: 2px; }

/* ========== Face Photos ========== */
.prev-face-photos { display: flex; gap: 12px; padding: 15px 20px; justify-content: center; }
.prev-face-photo { flex: 1; max-width: 200px; text-align: center; }
.prev-photo-box {
    width: 100%; aspect-ratio: 3/4; background: #f5f3f0; border-radius: 12px;
    overflow: hidden; display: flex; align-items: center; justify-content: center;
    font-size: 12px; color: #bbb;
}
.prev-photo-box.large { aspect-ratio: 3/4; }
.prev-photo-box img { width: 100%; height: 100%; object-fit: cover; }
.prev-photo-label { font-size: 12px; color: var(--secondary-color); margin-top: 6px; }

/* ========== Color Diagnosis Chips ========== */
.prev-color-diag { padding: 10px 20px; }
.prev-diag-item { margin-bottom: 20px; }
.prev-diag-title { font-size: 13px; font-weight: 600; color: var(--primary-color); margin-bottom: 10px; text-align: center; }
.prev-chips-row { display: flex; gap: 6px; justify-content: center; }
.prev-chip-item {
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    padding: 6px; border-radius: 10px; border: 2px solid transparent;
    transition: all 0.2s; min-width: 50px;
}
.prev-chip-item.active { border-color: var(--accent-color); background: #fdf8f5; }
.prev-chip-swatch { width: 36px; height: 36px; border-radius: 8px; border: 1px solid rgba(0,0,0,0.08); }
.prev-chip-lbl { font-size: 10px; color: var(--secondary-color); }

/* ========== Analysis Result ========== */
.prev-analysis-result { padding: 10px 20px; text-align: center; }
.prev-color-type-box {
    font-size: 22px; font-weight: 700; color: var(--accent-color);
    padding: 10px; letter-spacing: 1px;
}
.prev-palette-img { width: 100%; border-radius: 12px; margin-top: 12px; }

/* ========== Tone Chart ========== */
.prev-block { padding: 10px 20px; margin-bottom: 8px; }
.prev-block-title { font-size: 13px; font-weight: 600; color: var(--primary-color); margin-bottom: 10px; }
.prev-tone-chart { position: relative; }
.prev-full-img { width: 100%; border-radius: 8px; }
.prev-tone-marker {
    position: absolute; width: 20px; height: 20px; border-radius: 50%;
    transform: translate(-50%, -50%); z-index: 2;
}
.prev-tone-marker-main { background: rgba(220, 60, 60, 0.85); border: 2px solid white; box-shadow: 0 0 4px rgba(0,0,0,0.3); }
.prev-tone-marker-sub { background: rgba(60, 140, 220, 0.85); border: 2px solid white; box-shadow: 0 0 4px rgba(0,0,0,0.3); }
.prev-tone-marker-point { background: rgba(255, 200, 50, 0.85); border: 2px solid white; box-shadow: 0 0 4px rgba(0,0,0,0.3); }

/* ========== Color Swatches ========== */
.prev-color-sets { padding: 10px 20px; }
.prev-color-set-item { margin-bottom: 16px; }
.prev-color-set-label { font-size: 13px; font-weight: 600; color: var(--primary-color); margin-bottom: 8px; }
.prev-color-swatches { display: flex; gap: 6px; flex-wrap: wrap; }

/* ========== Contrast Grid ========== */
.prev-contrast-desc { font-size: 12px; color: var(--secondary-color); line-height: 1.7; margin-bottom: 12px; }
.prev-contrast-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px; }
.prev-contrast-level {
    position: relative; border-radius: 10px; overflow: hidden;
    border: 2px solid transparent; transition: border-color 0.2s;
}
.prev-contrast-level.selected { border-color: var(--accent-color); }
.prev-contrast-img { width: 100%; aspect-ratio: 3/4; object-fit: cover; display: block; background: #f5f3f0; }
.prev-contrast-label { display: block; text-align: center; font-size: 11px; color: var(--secondary-color); padding: 4px; }
.prev-contrast-check {
    position: absolute; top: 6px; right: 6px; width: 22px; height: 22px;
    background: var(--accent-color); color: white; border-radius: 50%;
    display: none; align-items: center; justify-content: center; font-size: 12px;
}
.prev-contrast-level.selected .prev-contrast-check { display: flex; }

/* ========== Slider ========== */
.prev-slider {
    display: flex; gap: 10px; overflow-x: auto; padding: 4px 0;
    scrollbar-width: none; -ms-overflow-style: none;
}
.prev-slider::-webkit-scrollbar { display: none; }
.prev-slider-card {
    flex: 0 0 140px; border-radius: 10px; overflow: hidden;
    background: #f5f3f0; aspect-ratio: 3/4;
}
.prev-slider-card img { width: 100%; height: 100%; object-fit: cover; }
.prev-slider-empty { color: #bbb; font-size: 12px; padding: 20px; text-align: center; }

/* ========== Muse ========== */
.prev-muse-img { width: 100%; border-radius: 12px; overflow: hidden; background: #f5f3f0; min-height: 100px; }
.prev-muse-img img { width: 100%; display: block; }

/* ========== Staff Comment ========== */
.prev-staff-comment-box {
    margin-top: 12px; padding: 16px; background: #faf8f5;
    border-radius: 10px; border-left: 3px solid var(--accent-color);
}
.prev-staff-comment-label { font-size: 12px; font-weight: 600; color: var(--accent-color); margin-bottom: 6px; }
.prev-staff-comment-text { font-size: 13px; color: var(--primary-color); line-height: 1.7; }

/* ========== Compare Grid ========== */
.prev-compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.prev-compare-item { text-align: center; }
.prev-compare-label { font-size: 12px; color: var(--secondary-color); margin-bottom: 8px; }
.prev-result-type { text-align: center; font-size: 18px; font-weight: 600; color: var(--accent-color); margin-top: 12px; }

/* ========== Best/Worst Labels ========== */
.prev-set-label { font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 12px; display: inline-block; margin: 8px 0 6px; }
.prev-set-label.best { background: #e8f5e9; color: #2e7d32; }
.prev-set-label.worst { background: #fce4ec; color: #c62828; }
.prev-reason { font-size: 12px; color: var(--secondary-color); line-height: 1.7; margin-top: 8px; padding: 8px; background: #faf8f5; border-radius: 8px; }

/* ========== Styling Keywords ========== */
.prev-keyword-section { padding: 20px; text-align: center; }
.prev-keyword-intro { font-size: 14px; color: var(--secondary-color); }
.prev-keyword-value { font-size: 20px; font-weight: 700; color: var(--accent-color); margin: 8px 0; }
.prev-keyword-outro { font-size: 14px; color: var(--secondary-color); }

/* ========== Floating Nav ========== */
.result-float-nav {
    position: fixed; bottom: 24px; right: 20px; z-index: 100;
    display: none; flex-direction: column; align-items: flex-end; gap: 8px;
}
.result-float-nav.visible { display: flex; }
.prev-float-menu {
    display: none; flex-direction: column; gap: 4px;
    background: white; border-radius: 16px; padding: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.12); border: 1px solid rgba(0,0,0,0.06);
}
.result-float-nav.menu-open .prev-float-menu { display: flex; }
.prev-float-btn {
    padding: 8px 16px; border: none; background: none;
    font-size: 13px; color: var(--primary-color); cursor: pointer;
    border-radius: 8px; transition: background 0.2s; font-family: var(--font-main);
}
.prev-float-btn:hover { background: #f5f3f0; }
.prev-float-divider { height: 1px; background: #eee; margin: 2px 0; }
.prev-float-toggle {
    width: 48px; height: 48px; border-radius: 50%; border: none;
    background: var(--text-color); color: white; font-size: 20px;
    cursor: pointer; box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: transform 0.2s;
}
.prev-float-toggle:hover { transform: scale(1.05); }

/* ========== Blur Effect ========== */
.prev-blur { position: relative; filter: blur(4px); opacity: 0.5; pointer-events: none; }
.prev-blur-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    z-index: 5; pointer-events: none;
}

/* ========== Fade Animation ========== */
.prev-fade { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.prev-fade.visible { opacity: 1; transform: translateY(0); }

/* ========== Responsive ========== */
@media (max-width: 520px) {
    .result-container { border: none; border-radius: 0; }
    .login-card { border-radius: 16px; padding: 36px 24px; }
    .prev-slider-card { flex: 0 0 120px; }
}