:root {
    /* Premium Color Palette */
    --primary-color: #0f172a;
    --accent-color: #38bdf8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --glass-bg: rgba(255, 255, 255, 0.8);
}

[data-theme='dark'] {
    --bg-color: #020617;
    --card-bg: #0f172a;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #1e293b;
    --glass-bg: rgba(15, 23, 42, 0.8);
}

* {
    margin: 0; padding: 0; box-sizing: border-box;
    font-family: 'Pretendard', -apple-system, system-ui, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.4s ease;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Global Header */
header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    padding: 20px 0;
    position: sticky; top: 0; z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.header-flex { display: flex; justify-content: space-between; align-items: center; }

.logo {
    font-size: 1.6rem; font-weight: 900; letter-spacing: -1.5px;
    text-decoration: none; color: var(--text-main);
    background: linear-gradient(135deg, var(--accent-color) 0%, #818cf8 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

nav { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 15px; justify-content: center; }
nav a {
    color: var(--text-muted); text-decoration: none; font-weight: 600; font-size: 0.85rem;
    padding: 10px 18px; border-radius: 12px; transition: 0.3s; white-space: nowrap;
}
nav a:hover, nav a.active { background: var(--primary-color); color: white; }
[data-theme='dark'] nav a:hover, [data-theme='dark'] nav a.active { background: var(--accent-color); color: var(--primary-color); }

/* Controls */
.controls-bar { display: flex; gap: 10px; }
.control-btn {
    background: var(--border-color); border: none; width: 40px; height: 40px;
    border-radius: 12px; cursor: pointer; color: var(--text-main);
    font-weight: 800; font-size: 0.8rem; display: flex; align-items: center; justify-content: center;
    transition: 0.3s;
}
.control-btn:hover { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0,0,0,0.1); }

/* Hero */
.hero { padding: 80px 0 40px; text-align: center; }
.hero h2 { font-size: 3.5rem; font-weight: 900; letter-spacing: -2px; margin-bottom: 20px; }
.hero p { color: var(--text-muted); font-size: 1.2rem; max-width: 600px; margin: 0 auto; }

/* Cards & Selections */
.selection-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 30px; }
.selectable-card {
    background: var(--card-bg); border: 2px solid var(--border-color);
    padding: 30px; border-radius: 24px; cursor: pointer; text-align: center;
    transition: 0.3s; position: relative;
}
.selectable-card:hover { border-color: var(--accent-color); transform: translateY(-5px); }
.selectable-card.active { border-color: var(--accent-color); background: rgba(56, 189, 248, 0.05); }
.selectable-card i { font-size: 2.5rem; margin-bottom: 15px; color: var(--text-muted); }
.selectable-card.active i { color: var(--accent-color); }
.selectable-card span { display: block; font-weight: 800; font-size: 1.1rem; }

/* Luxury Report Card */
.luxury-report-card {
    background: var(--card-bg); border-radius: 40px; overflow: hidden;
    box-shadow: 0 30px 100px rgba(0,0,0,0.08); border: 1px solid var(--border-color);
    animation: slideUp 0.8s ease;
}

.report-header {
    background: linear-gradient(to right, #f8fafc, #f1f5f9);
    padding: 60px 40px; text-align: center; border-bottom: 1px solid var(--border-color);
}
[data-theme='dark'] .report-header { background: linear-gradient(to right, #0f172a, #1e293b); }

.report-badge {
    display: inline-block; padding: 8px 20px; background: var(--accent-color);
    color: white; border-radius: 50px; font-size: 0.75rem; font-weight: 900;
    text-transform: uppercase; margin-bottom: 20px; letter-spacing: 1px;
}

.nutrient-focus-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; padding: 50px 40px; }

.focus-item {
    padding: 30px; background: var(--bg-color); border-radius: 24px;
    border: 1px solid var(--border-color); transition: 0.3s;
}
.focus-item:hover { transform: translateY(-5px); border-color: var(--accent-color); }

/* Exercise Specific Layout */
.exercise-focus-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 30px;
    align-items: start;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    transition: 0.3s;
}

.exercise-image-wrapper {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.exercise-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.5s;
}

.exercise-focus-item:hover img {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .exercise-focus-item {
        grid-template-columns: 1fr;
    }
    .exercise-image-wrapper {
        max-width: 300px;
        margin: 0 auto 20px;
    }
}

.focus-name { font-size: 1.25rem; font-weight: 900; color: var(--primary-color); margin-bottom: 12px; }
.focus-info { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 20px; line-height: 1.6; }
.focus-search-btn {
    background: none; border: none; color: var(--accent-color); font-weight: 800;
    cursor: pointer; padding: 0; font-size: 0.9rem;
}

.report-footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--border-color); border-top: 1px solid var(--border-color); }
.footer-box { padding: 40px; background: var(--card-bg); }
.footer-box label { display: block; font-size: 0.75rem; font-weight: 900; color: var(--text-muted); text-transform: uppercase; margin-bottom: 10px; }
.footer-box p { font-size: 1rem; color: var(--text-main); font-weight: 500; }
.footer-box.caution p { color: var(--warning-color); }

/* Forms & Buttons */
select, input {
    width: 100%; padding: 18px; border-radius: 16px; border: 2px solid var(--border-color);
    background: var(--card-bg); color: var(--text-main); font-size: 1rem; font-weight: 600;
    outline: none; transition: 0.3s;
}
select:focus, input:focus { border-color: var(--accent-color); }

.luxury-btn {
    width: 100%; padding: 22px; background: var(--primary-color); color: white;
    border: none; border-radius: 20px; font-size: 1.1rem; font-weight: 800;
    cursor: pointer; transition: 0.3s; margin-top: 20px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.2);
}
.luxury-btn:hover { transform: scale(1.02); filter: brightness(1.2); }

/* Search Results (Drug Cards) */
.drug-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; margin-top: 40px; }
.drug-card {
    background: var(--card-bg); padding: 30px; border-radius: 24px;
    border: 1px solid var(--border-color); cursor: pointer; transition: 0.3s;
}
.drug-card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px rgba(0,0,0,0.05); border-color: var(--accent-color); }
.card-category { display: inline-block; padding: 4px 12px; border-radius: 6px; font-size: 0.7rem; font-weight: 800; margin-bottom: 15px; }
.card-category.pro { background: #fee2e2; color: #ef4444; }
.card-category.general { background: #dcfce7; color: #10b981; }
.card-name { font-size: 1.2rem; font-weight: 800; margin-bottom: 5px; }

/* Modal */
.modal { display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); backdrop-filter: blur(8px); }
.modal-content {
    background: var(--card-bg); margin: 5% auto; padding: 50px; width: 90%; max-width: 800px;
    border-radius: 40px; position: relative; animation: slideUp 0.5s ease;
    overflow-y: auto; max-height: 90vh;
}
.close { position: absolute; right: 30px; top: 25px; font-size: 28px; cursor: pointer; color: var(--text-muted); }

/* Animation */
@keyframes slideUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }

/* MBTI Extra */
.luxury-report { background: var(--card-bg); border-radius: 40px; padding: 50px; box-shadow: 0 30px 100px rgba(0,0,0,0.08); border: 1px solid var(--border-color); }
.progress-container { width: 100%; height: 8px; background: var(--border-color); border-radius: 10px; margin-bottom: 40px; }
.progress-bar { height: 100%; background: var(--accent-color); border-radius: 10px; transition: 0.4s; }

/* Spinner */
.premium-loader { width: 50px; height: 50px; border: 3px solid var(--border-color); border-top: 3px solid var(--accent-color); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Tarot Card Flip Animation */
.tarot-grid {
    display: flex; justify-content: center; gap: 20px; margin: 40px 0;
    perspective: 1000px; flex-wrap: wrap;
}
.tarot-card-container {
    width: 140px; height: 240px; position: relative;
    transform-style: preserve-3d; transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}
.tarot-card-container.flipped { transform: rotateY(180deg); }
.card-face {
    position: absolute; width: 100%; height: 100%;
    backface-visibility: hidden; border-radius: 12px;
    border: 4px solid var(--border-color); overflow: hidden;
}
.card-front {
    background: #fff; transform: rotateY(180deg);
    display: flex; flex-direction: column;
}
.card-back {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1e293b 100%);
    display: flex; align-items: center; justify-content: center;
    color: var(--accent-color); font-size: 2.5rem;
}

footer { padding: 80px 0; text-align: center; color: var(--text-muted); border-top: 1px solid var(--border-color); margin-top: 100px; }

/* Mobile overrides */
@media (max-width: 480px) {
    nav a { font-size: 0.78rem; padding: 8px 10px; }
    .modal-content { padding: 30px 20px !important; border-radius: 24px; }
    .drug-list { grid-template-columns: 1fr; }
}