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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f0f4ff 0%, #ffffff 50%, #f5f0ff 100%);
    min-height: 100vh;
    color: #333;
}

#app {
    max-width: 600px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #3b82f6;
}

.notification-btn {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: #666;
    border-radius: 8px;
    transition: background 0.2s;
}

.notification-btn:hover {
    background: #f3f4f6;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Hero Card */
.hero-card {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    border-radius: 24px;
    padding: 32px 24px;
    color: white;
    box-shadow: 0 4px 20px rgba(34, 197, 94, 0.3);
}

.hero-card.down {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.3);
}

.hero-card.hold {
    background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
    box-shadow: 0 4px 20px rgba(107, 114, 128, 0.3);
}

.hero-date {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 12px;
}

.hero-title {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
}

.hero-subtitle {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 20px;
    line-height: 1.5;
}

.hero-btn {
    background: white;
    color: #22c55e;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.hero-card.down .hero-btn {
    color: #ef4444;
}

.hero-card.hold .hero-btn {
    color: #6b7280;
}

.hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Prediction Card */
.prediction-card {
    background: white;
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    border: 2px solid #e0e7ff;
}

.prediction-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.prediction-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1f2937;
}

.prediction-badge {
    background: #dcfce7;
    color: #16a34a;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.prediction-content {
    margin-bottom: 16px;
}

.prediction-direction {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.direction-icon {
    color: #22c55e;
}

.direction-icon.down {
    color: #ef4444;
    transform: rotate(180deg);
}

.prediction-direction span {
    font-size: 1.8rem;
    font-weight: 700;
    color: #22c55e;
}

.prediction-direction.down span {
    color: #ef4444;
}

.confidence-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.confidence-label {
    font-size: 0.9rem;
    color: #6b7280;
}

.stars {
    display: flex;
    gap: 2px;
}

.star {
    font-size: 1.1rem;
}

.star.empty {
    opacity: 0.3;
}

.confidence-percent {
    font-size: 0.9rem;
    font-weight: 600;
    color: #374151;
    margin-left: 4px;
}

/* Expand Button */
.expand-btn {
    width: 100%;
    background: #eff6ff;
    color: #3b82f6;
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background 0.2s;
}

.expand-btn:hover {
    background: #dbeafe;
}

.expand-btn svg {
    transition: transform 0.3s;
}

.expand-btn.expanded svg {
    transform: rotate(180deg);
}

/* Expand Content */
.expand-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, margin-top 0.3s ease-out;
}

.expand-content.show {
    max-height: 600px;
    margin-top: 16px;
}

.factors-section {
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
}

.factors-section.positive {
    background: #f0fdf4;
}

.factors-section.negative {
    background: #fef2f2;
}

.factors-section h4 {
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.factors-section.positive h4 {
    color: #166534;
}

.factors-section.negative h4 {
    color: #991b1b;
}

.factors-section ul {
    list-style: none;
    padding-left: 0;
}

.factors-section li {
    font-size: 0.9rem;
    color: #374151;
    padding: 8px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    line-height: 1.5;
}

.factors-section li:last-child {
    border-bottom: none;
}

/* Footer */
.footer {
    background: #f9fafb;
    padding: 24px 20px;
    text-align: center;
    margin-top: auto;
}

.footer p {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 8px;
}

.footer p:last-child {
    margin-bottom: 0;
}

/* Loading / Error */
.loading {
    opacity: 0.6;
}

.error-message {
    color: #ef4444;
    text-align: center;
    padding: 20px;
    background: #fef2f2;
    border-radius: 12px;
    margin: 20px;
}

/* Responsive */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.3rem;
    }
    
    .prediction-direction span {
        font-size: 1.5rem;
    }
}