:root {
    --primary: #4361ee;
    --primary-light: #4895ef;
    --secondary: #3f37c9;
    --accent: #f72585;
    --bg-app: #f0f4f8;
    --bg-card: #ffffff;
    --text-main: #2b2d42;
    --text-sub: #8d99ae;
    --c-installment: #ef476f;
    --c-insurance: #ffd166;
    --c-tax: #06d6a0;
    --c-fuel: #118ab2;
    --c-maint: #073b4c;
    --radius-lg: 20px;
    --radius-md: 12px;
    --shadow-card: 0 10px 20px rgba(0,0,0,0.05), 0 6px 6px rgba(0,0,0,0.05);
    --shadow-monitor: 0 15px 30px rgba(67, 97, 238, 0.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Noto Sans KR', sans-serif; }
body { background-color: var(--bg-app); color: var(--text-main); display: flex; justify-content: center; min-height: 100vh; padding: 20px; }
.app-wrapper { width: 100%; max-width: 480px; display: flex; flex-direction: column; gap: 20px; }

/* Monitor */
.monitor-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-lg);
    padding: 35px 20px;
    text-align: center;
    color: white;
    box-shadow: var(--shadow-monitor);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.monitor-section.safe { background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%); }
.monitor-section.warning { background: linear-gradient(135deg, #f39c12 0%, #f1c40f 100%); }
.monitor-section.danger { background: linear-gradient(135deg, #e67e22 0%, #d35400 100%); }
.monitor-section.bankrupt { background: linear-gradient(135deg, #c0392b 0%, #e74c3c 100%); }

.monitor-badge { position: absolute; top: 15px; right: 15px; background: rgba(255, 255, 255, 0.2); padding: 5px 12px; border-radius: 20px; font-size: 0.75rem; font-weight: 800; border: 1px solid rgba(255, 255, 255, 0.3); z-index: 2; }
.monitor-content { min-height: 140px; display: flex; align-items: center; justify-content: center; margin-bottom: 10px; }
.monitor-icon { font-size: 4.5rem; filter: drop-shadow(0 4px 8px rgba(0,0,0,0.2)); animation: float 3s infinite alternate; }
.monitor-img { max-width: 100%; max-height: 180px; object-fit: contain; filter: drop-shadow(0 8px 16px rgba(0,0,0,0.3)); }
.car-price-tag { font-size: 0.85rem; font-weight: 700; background: rgba(0,0,0,0.2); display: inline-block; padding: 3px 10px; border-radius: 6px; margin-bottom: 12px; }

@keyframes float { from { transform: translateY(0); } to { transform: translateY(-10px); } }

/* Cards & Inputs */
.card { background: var(--bg-card); border-radius: var(--radius-lg); padding: 25px; box-shadow: var(--shadow-card); }
.card h3 { font-size: 1.1rem; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
.card h3::before { content: ''; width: 4px; height: 18px; background-color: var(--primary); border-radius: 2px; }
.input-row { display: flex; gap: 15px; margin-bottom: 15px; }
.input-group { flex: 1; }
label { display: block; font-size: 0.85rem; font-weight: 700; color: var(--text-sub); margin-bottom: 8px; }
input, select { width: 100%; padding: 14px 16px; font-size: 1rem; font-weight: 600; border-radius: var(--radius-md); border: 2px solid transparent; background: #f8f9fa; transition: 0.2s; }
input:disabled { opacity: 0.5; cursor: not-allowed; }

/* Mileage Toggle UI */
.mileage-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.toggle-container { background: #e9ecef; padding: 4px; border-radius: 10px; display: flex; }
.toggle-btn { padding: 6px 12px; border-radius: 8px; font-size: 0.8rem; font-weight: 700; border: none; cursor: pointer; background: transparent; color: var(--text-sub); transition: 0.2s; }
.toggle-btn.active { background: white; color: var(--primary); box-shadow: 0 2px 4px rgba(0,0,0,0.1); }

/* Push reveal button */
.reveal-area { text-align: center; margin: 10px 0; }
.btn-reveal { background: none; border: 2px dashed var(--text-sub); color: var(--text-sub); padding: 12px 20px; border-radius: var(--radius-md); font-weight: 700; cursor: pointer; transition: 0.2s; }
.btn-reveal:hover { border-color: var(--primary); color: var(--primary); }

/* Hidden Push Section */
.push-container { text-align: center; margin: 20px 0; padding: 20px; background: #fff4e6; border-radius: var(--radius-lg); border: 2px solid #ffd8a8; }
.push-main-row { display: flex; gap: 10px; margin-bottom: 10px; }
.btn-push { flex: 1; padding: 16px; background: linear-gradient(135deg, #ff922b 0%, #f76707 100%); color: white; border: none; border-radius: var(--radius-md); font-weight: 800; cursor: pointer; }
.btn-reset { width: 60px; background: #e9ecef; border: none; border-radius: var(--radius-md); font-size: 1.2rem; cursor: pointer; }
.push-tip { font-size: 0.75rem; color: var(--text-sub); margin-top: 8px; }

/* Result */
.total-cost-display { text-align: center; padding: 20px 0; border-bottom: 2px dashed #f1f3f5; margin-bottom: 20px; }
#total-monthly-cost { font-size: 2.8rem; font-weight: 900; }
.chart-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; position: relative; width: 100%; }
.chart-label { width: 70px; flex-shrink: 0; font-size: 0.85rem; color: var(--text-sub); font-weight: 600; text-align: left; }
.chart-bar-bg { flex: 1; height: 12px; background: #f1f3f5; border-radius: 6px; overflow: hidden; cursor: help; }
.chart-bar-fill { height: 100%; border-radius: 6px; transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1); }
.chart-bar-fill.installment { background: var(--c-installment); }
.chart-bar-fill.insurance { background: var(--c-insurance); }
.chart-bar-fill.tax { background: var(--c-tax); }
.chart-bar-fill.fuel { background: var(--c-fuel); }
.chart-bar-fill.maintenance { background: var(--c-maint); }
.chart-value { width: 85px; flex-shrink: 0; text-align: right; font-size: 0.85rem; font-weight: 700; }

.chart-tooltip {
    position: absolute; bottom: 120%; left: 50%; transform: translateX(-50%);
    background: rgba(33, 37, 41, 0.95); color: white; padding: 10px; border-radius: 8px;
    font-size: 0.7rem; line-height: 1.4; white-space: pre-line; width: 200px; z-index: 100;
    display: none; box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.chart-row:hover .chart-tooltip { display: block; }

.hidden { display: none !important; }
.seo-card { background: white; padding: 20px; border-radius: var(--radius-lg); border-left: 5px solid var(--primary); margin-top: 20px; }
.site-footer { text-align: center; font-size: 0.8rem; color: var(--text-sub); margin: 40px 0; }