/* ========================================
   Solar Recycle - Design System
   Theme: "Solar Future - 環境テック"
   Created: 2025-12-15
   ======================================== */

/* ========== CSS Variables ========== */
:root {
    /* Typography */
    --font-display: 'LINESeedJP', sans-serif;
    --font-body: 'LINESeedJP', sans-serif;
    --font-size-base: 1rem;    /* 16px */
    --font-size-sm: 0.875rem;  /* 14px */
    --font-size-lg: 1.125rem;  /* 18px */
    --font-size-xl: 1.5rem;    /* 24px */
    --font-size-2xl: 2rem;     /* 32px */
    --font-size-3xl: 2.5rem;   /* 40px */
    --font-size-4xl: 3rem;     /* 48px */

    /* Colors - Solar Future Theme */
    --color-primary: #FF9500;      /* Solar Orange */
    --color-secondary: #00B894;    /* Eco Green */
    --color-accent: #0984E3;       /* Sky Blue */
    --color-dark: #2D3436;         /* Charcoal */
    --color-light: #DFE6E9;        /* Light Gray */
    --color-white: #FFFFFF;

    /* Semantic Colors */
    --color-success: #00B894;
    --color-danger: #E74C3C;
    --color-warning: #F39C12;
    --color-info: #0984E3;

    /* Neutral Colors */
    --gray-100: #F7F7F7;
    --gray-200: #EEEEEE;
    --gray-300: #DDDDDD;
    --gray-400: #CCCCCC;
    --gray-500: #999999;
    --gray-600: #666666;
    --gray-700: #444444;
    --gray-800: #2D3436;
    --gray-900: #1A1A1A;

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #FF9500 0%, #FFD93D 100%);
    --gradient-cta: linear-gradient(135deg, #FF9500 0%, #FF6B00 100%);
    --gradient-card: linear-gradient(135deg, rgba(255, 149, 0, 0.1) 0%, rgba(255, 217, 61, 0.05) 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 1rem;      /* 16px */
    --spacing-md: 1.5rem;    /* 24px */
    --spacing-lg: 2rem;      /* 32px */
    --spacing-xl: 3rem;      /* 48px */
    --spacing-2xl: 4rem;     /* 64px */
    --spacing-3xl: 6rem;     /* 96px */
    --section-padding: 80px 0;
    --container-max-width: 1200px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(45, 52, 54, 0.1);
    --shadow-lg: 0 8px 30px rgba(45, 52, 54, 0.15);
    --shadow-xl: 0 12px 40px rgba(45, 52, 54, 0.2);
    --shadow-card: 0 4px 20px rgba(45, 52, 54, 0.1);
    --shadow-hover: 0 8px 30px rgba(45, 52, 54, 0.15);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1050;
    --z-tooltip: 1070;
}

/* ========== Base Styles ========== */
body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--color-white);
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1, .h1 { font-size: var(--font-size-4xl); }
h2, .h2 { font-size: var(--font-size-3xl); }
h3, .h3 { font-size: var(--font-size-2xl); }
h4, .h4 { font-size: var(--font-size-xl); }
h5, .h5 { font-size: var(--font-size-lg); }
h6, .h6 { font-size: var(--font-size-base); }

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* ========== Navigation ========== */
.navbar-brand {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.navbar-brand .text-primary {
    color: var(--color-primary) !important;
}

.navbar-brand .text-success {
    color: var(--color-secondary) !important;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color var(--transition-base);
}

.nav-link:hover {
    color: var(--color-primary) !important;
}

/* ========== Buttons ========== */
.btn {
    font-family: var(--font-body);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-cta);
    border: none;
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #FF6B00 0%, #FF9500 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--color-white);
}

.btn-cta {
    font-size: var(--font-size-lg);
    padding: 1rem 2rem;
}

.btn-secondary {
    background-color: var(--color-secondary);
    border: none;
    color: var(--color-white);
}

.btn-secondary:hover {
    background-color: #00a080;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    background-color: transparent;
}

.btn-outline-primary:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ========== Cards ========== */
.card {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-primary);
}

.card-header {
    background: var(--gradient-card);
    border-bottom: 1px solid var(--gray-200);
    font-weight: 600;
}

/* ========== Badges ========== */
.badge {
    font-weight: 600;
    padding: 0.35em 0.65em;
    border-radius: var(--radius-sm);
    font-size: 0.85em;
}

/* ========== Footer ========== */
.footer {
    background-color: var(--gray-900);
}

.footer h5, .footer h6 {
    color: var(--color-white);
}

.footer a {
    color: var(--gray-400);
    transition: color var(--transition-base);
}

.footer a:hover {
    color: var(--color-primary);
}

/* フッター内のtext-mutedを明るい色に上書き */
.footer .text-muted,
.footer p,
.footer small,
.footer span {
    color: var(--gray-400) !important;
}

.footer .small {
    color: var(--gray-400) !important;
}

/* ========== Hero Section ========== */
.hero {
    background: var(--gradient-hero);
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 10px,
            rgba(255, 255, 255, 0.03) 10px,
            rgba(255, 255, 255, 0.03) 20px
        );
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    animation: fadeUp 0.8s ease-out;
}

.hero-cta {
    animation: fadeUp 0.8s ease-out 0.2s backwards;
}

/* ========== Animations ========== */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeUp 0.6s ease-out;
}

/* ========== Forms ========== */
.form-control,
.form-select {
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-300);
    padding: 0.75rem 1rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(255, 149, 0, 0.25);
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

/* ========== Accordion (Material Icons standard) ========== */
.accordion-icon {
    font-size: 14px;
    transition: transform var(--transition-slow);
}

.collapsed .accordion-icon {
    transform: rotate(-90deg);  /* 閉じた時は右向き */
}

/* ========== Utility Classes ========== */
.text-primary { color: var(--color-primary) !important; }
.text-secondary { color: var(--color-secondary) !important; }
.text-accent { color: var(--color-accent) !important; }

.bg-primary { background-color: var(--color-primary) !important; }
.bg-secondary { background-color: var(--color-secondary) !important; }
.bg-light-gradient { background: var(--gradient-card); }
.bg-gradient-primary { background: var(--gradient-hero) !important; }

.shadow-card { box-shadow: var(--shadow-card); }
.shadow-hover { box-shadow: var(--shadow-hover); }

.section-padding {
    padding: var(--section-padding);
}

/* ========== Data Cards ========== */
.data-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.data-card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.data-card-icon .material-icons {
    color: white;
    font-size: 24px;
}

.data-card-content {
    display: flex;
    flex-direction: column;
}

.data-label {
    font-size: 0.85rem;
    color: var(--gray-600);
}

.data-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

/* ========== Climate Cards ========== */
.climate-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    height: 100%;
}

.climate-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.climate-card-icon.sun {
    background: linear-gradient(135deg, #FFB020, #FF9500);
}

.climate-card-icon.generation {
    background: linear-gradient(135deg, #00D9A5, #00B894);
}

.climate-card-icon.climate {
    background: linear-gradient(135deg, #6C5CE7, #A29BFE);
}

.climate-card-icon .material-icons {
    color: white;
    font-size: 28px;
}

.climate-card-content {
    display: flex;
    flex-direction: column;
}

.climate-label {
    font-size: 0.85rem;
    color: var(--gray-600);
}

.climate-value {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--gray-900);
}

.climate-note {
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* ========== Risk Cards ========== */
.risk-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--gray-300);
}

.risk-card.risk-high {
    border-left-color: #E74C3C;
    background: linear-gradient(90deg, rgba(231, 76, 60, 0.05), transparent);
}

.risk-card.risk-medium {
    border-left-color: #F39C12;
    background: linear-gradient(90deg, rgba(243, 156, 18, 0.05), transparent);
}

.risk-card.risk-low {
    border-left-color: #27AE60;
    background: linear-gradient(90deg, rgba(39, 174, 96, 0.05), transparent);
}

.risk-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    flex-shrink: 0;
}

.risk-high .risk-icon {
    background: rgba(231, 76, 60, 0.1);
}

.risk-high .risk-icon .material-icons {
    color: #E74C3C;
}

.risk-medium .risk-icon {
    background: rgba(243, 156, 18, 0.1);
}

.risk-medium .risk-icon .material-icons {
    color: #F39C12;
}

.risk-low .risk-icon {
    background: rgba(39, 174, 96, 0.1);
}

.risk-low .risk-icon .material-icons {
    color: #27AE60;
}

.risk-content {
    display: flex;
    flex-direction: column;
}

.risk-label {
    font-size: 0.85rem;
    color: var(--gray-600);
}

.risk-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.risk-note {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 2px;
}

/* ========== Responsive Design ========== */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;     /* 32px */
        --font-size-3xl: 1.75rem;  /* 28px */
        --font-size-2xl: 1.5rem;   /* 24px */
        --section-padding: 60px 0;
    }

    .hero {
        padding: var(--spacing-2xl) 0;
    }

    .btn-cta {
        font-size: var(--font-size-base);
        padding: 0.875rem 1.5rem;
    }

    h1, .h1 { font-size: var(--font-size-3xl); }
    h2, .h2 { font-size: var(--font-size-2xl); }
}

@media (min-width: 769px) and (max-width: 1024px) {
    :root {
        --section-padding: 80px 0;
    }
}

@media (min-width: 1025px) {
    .container {
        max-width: var(--container-max-width);
    }
}