:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --accent-color: #38bdf8;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    --nav-height: 70px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.7;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 내비게이션 */
.navbar {
    height: var(--nav-height);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0; width: 100%; z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1000px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-menu a:hover { color: var(--accent-color); }

/* 히어로 섹션 */
.hero {
    margin-top: calc(var(--nav-height) + 4rem);
    text-align: center;
    margin-bottom: 4rem;
}

.hero h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight { color: var(--accent-color); }

.cta-button {
    display: inline-block;
    background: var(--accent-color);
    color: var(--bg-color);
    padding: 1rem 2.5rem;
    border-radius: 2rem;
    font-weight: 700;
    text-decoration: none;
    margin-top: 2rem;
    transition: transform 0.3s;
}

.cta-button:hover { transform: translateY(-3px); }

/* 섹션 공통 */
.section { margin-bottom: 6rem; }
.section-title { text-align: center; margin-bottom: 3rem; }

/* 업로드/분석 영역 */
.analysis-box {
    background: var(--card-bg);
    border-radius: 2rem;
    padding: 3rem;
    border: 1px solid var(--glass-border);
}

.drop-zone {
    border: 2px dashed var(--glass-border);
    border-radius: 1.5rem;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.drop-zone:hover { border-color: var(--accent-color); background: rgba(56, 189, 248, 0.05); }

/* 광고 컨테이너 */
.ad-container {
    margin: 3rem 0;
    text-align: center;
    background: rgba(255, 255, 255, 0.02);
    padding: 1rem;
    border-radius: 0.5rem;
}

.ad-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

/* 정보성 카드 */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.info-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 2rem;
    border-radius: 1.5rem;
    border: 1px solid var(--glass-border);
}

.info-card h3 { color: var(--accent-color); margin-bottom: 1rem; }

/* 푸터 */
footer {
    border-top: 1px solid var(--glass-border);
    padding: 4rem 0;
    margin-top: 6rem;
    text-align: center;
}

.footer-links {
    margin: 1.5rem 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a { color: var(--text-secondary); text-decoration: none; font-size: 0.9rem; }

.disclaimer { font-size: 0.8rem; color: var(--text-secondary); max-width: 600px; margin: 2rem auto 0; }

.hidden { display: none; }

/* 분석 중 스캔 효과 및 로딩바 */
.image-wrapper { position: relative; border-radius: 1rem; overflow: hidden; }
#faceCanvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.progress-bar { width: 100%; height: 6px; background: #1e293b; border-radius: 3px; margin-top: 1rem; }
.progress-fill { width: 0%; height: 100%; background: var(--accent-color); transition: width 0.3s; }