/* ========================================
   生活コスト予報 - Bento Grid × FinTech Style
   ======================================== */

:root {
    /* Colors */
    --bg-primary: #F0F4F8;
    --bg-card: #FFFFFF;
    --text-primary: #1A1A2E;
    --text-secondary: #6B7280;
    --text-white: #FFFFFF;

    /* Weather Gradients (財布テーマ) */
    --sunny-start: #10B981;
    --sunny-end: #34D399;
    --fine-start: #60A5FA;
    --fine-end: #93C5FD;
    --cloudy-start: #9CA3AF;
    --cloudy-end: #D1D5DB;
    --rainy-start: #F59E0B;
    --rainy-end: #FBBF24;
    --stormy-start: #EF4444;
    --stormy-end: #F87171;
    --typhoon-start: #7C3AED;
    --typhoon-end: #A78BFA;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* Shadows */
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

#app {
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-bottom: 100px;
}

/* ========================================
   Header
   ======================================== */
.header {
    margin-bottom: var(--spacing-lg);
}

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

.logo {
    font-size: 1.4rem;
    font-weight: 700;
}

.city-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid var(--text-primary);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
}

/* ========================================
   Hero Weather Card
   ======================================== */
.hero-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    color: var(--text-white);
    margin-bottom: var(--spacing-lg);
    transition: all 0.5s ease;
}

.bg-sunny {
    background: linear-gradient(135deg, var(--sunny-start) 0%, var(--sunny-end) 100%);
    box-shadow: 0 10px 20px -10px rgba(16, 185, 129, 0.4);
}

.bg-fine {
    background: linear-gradient(135deg, var(--fine-start) 0%, var(--fine-end) 100%);
    box-shadow: 0 10px 20px -10px rgba(96, 165, 250, 0.4);
}

.bg-cloudy {
    background: linear-gradient(135deg, var(--cloudy-start) 0%, var(--cloudy-end) 100%);
    box-shadow: 0 10px 20px -10px rgba(156, 163, 175, 0.4);
}

.bg-rainy {
    background: linear-gradient(135deg, var(--rainy-start) 0%, var(--rainy-end) 100%);
    box-shadow: 0 10px 20px -10px rgba(245, 158, 11, 0.4);
}

.bg-stormy {
    background: linear-gradient(135deg, var(--stormy-start) 0%, var(--stormy-end) 100%);
    box-shadow: 0 10px 20px -10px rgba(239, 68, 68, 0.4);
}

.bg-typhoon {
    background: linear-gradient(135deg, var(--typhoon-start) 0%, var(--typhoon-end) 100%);
    box-shadow: 0 10px 20px -10px rgba(124, 58, 237, 0.4);
}

.hero-icon {
    font-size: 3.5rem;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.2);
}

.hero-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.hero-message {
    font-size: 0.9rem;
    opacity: 0.95;
}

/* ========================================
   Section Titles
   ======================================== */
.section {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-xs);
}

/* ========================================
   Cost Grid (2x2)
   ======================================== */
.cost-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.cost-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
    transition: all 0.2s ease;
}

.cost-card:active {
    transform: scale(0.98);
}

.cost-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
}

.cost-card.weather-sunny::before { background: var(--sunny-start); }
.cost-card.weather-fine::before { background: var(--fine-start); }
.cost-card.weather-cloudy::before { background: var(--cloudy-start); }
.cost-card.weather-rainy::before { background: var(--rainy-start); }
.cost-card.weather-stormy::before { background: var(--stormy-start); }
.cost-card.weather-typhoon::before { background: var(--typhoon-start); }

.cost-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.cost-icon {
    font-size: 1.5rem;
}

.weather-badge {
    font-size: 1.25rem;
}

.cost-name {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.cost-price {
    font-family: 'Roboto Mono', monospace;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.cost-change {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.85rem;
    font-weight: 500;
}

.change-up { color: var(--stormy-start); }
.change-down { color: var(--sunny-start); }
.change-stable { color: var(--text-secondary); }

/* ========================================
   Year Comparison
   ======================================== */
.year-comparison {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.year-item {
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.year-item-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.year-icon {
    font-size: 1.25rem;
}

.year-name {
    font-size: 0.9rem;
    font-weight: 500;
}

.year-change {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    font-weight: 600;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.footer p {
    margin-bottom: var(--spacing-xs);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.cost-card, .year-item {
    animation: fadeIn 0.4s ease forwards;
}

.cost-card:nth-child(1) { animation-delay: 0.1s; }
.cost-card:nth-child(2) { animation-delay: 0.15s; }
.cost-card:nth-child(3) { animation-delay: 0.2s; }
.cost-card:nth-child(4) { animation-delay: 0.25s; }

.year-item:nth-child(1) { animation-delay: 0.3s; }
.year-item:nth-child(2) { animation-delay: 0.35s; }
.year-item:nth-child(3) { animation-delay: 0.4s; }
.year-item:nth-child(4) { animation-delay: 0.45s; }