/* ========== CSS Variables ========== */
:root {
    /* Dark Theme (Default) */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #21262d;
    --bg-card-hover: #30363d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --border: #30363d;
    --success: #3fb950;
    --warning: #d29922;
    --star-filled: #ffc107;
    --star-empty: #30363d;
    --shadow: rgba(0, 0, 0, 0.4);
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-card: #ffffff;
    --bg-card-hover: #f3f4f6;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --text-muted: #8b949e;
    --accent: #0969da;
    --accent-hover: #0550ae;
    --border: #d0d7de;
    --success: #1a7f37;
    --warning: #9a6700;
    --star-filled: #f59e0b;
    --star-empty: #d0d7de;
    --shadow: rgba(0, 0, 0, 0.1);
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
}

/* ========== Base Styles ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}

/* ========== Header ========== */
.header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    padding: 2rem;
    text-align: center;
    position: relative;
    box-shadow: 0 4px 20px var(--shadow);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.header-icon {
    font-size: 2.5rem;
}

.material-symbols-outlined {
    vertical-align: middle;
}

.header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

/* Header Navigation */
.header-nav {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* Header Buttons */
.header-buttons {
    margin-top: 1.5rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.cta-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Theme Toggle */
.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* ========== Stats Section ========== */
.stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
    flex-wrap: wrap;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem 2.5rem;
    text-align: center;
    min-width: 150px;
    box-shadow: 0 4px 12px var(--shadow);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* ========== Records Container ========== */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

.section-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

/* ========== Record Cards ========== */
.records-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.record-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow);
}

.record-card:hover {
    background: var(--bg-card-hover);
    transform: translateX(8px);
    box-shadow: 0 4px 16px var(--shadow);
}

.record-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.record-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.record-date {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.record-name {
    color: var(--text-secondary);
    font-weight: 500;
}

.record-amount {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: #fff;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 1rem;
}

.record-content {
    margin-bottom: 1rem;
}

.record-content h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.record-rating {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.5rem;
}

.star {
    font-size: 1.2rem;
    color: var(--star-empty);
}

.star.filled {
    color: var(--star-filled);
}

.record-comment {
    background: var(--bg-secondary);
    border-left: 3px solid var(--accent);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.record-comment::before {
    content: '"';
    font-size: 1.5rem;
    color: var(--accent);
    margin-right: 0.25rem;
}

.record-comment::after {
    content: '"';
    font-size: 1.5rem;
    color: var(--accent);
    margin-left: 0.25rem;
}

/* ========== Empty State ========== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

/* ========== Footer ========== */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

/* ========== Loading Animation ========== */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 4rem;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.8rem;
    }

    .stats {
        gap: 1rem;
    }

    .stat-card {
        padding: 1rem 1.5rem;
        min-width: 120px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .container {
        padding: 1rem;
    }

    .record-header {
        flex-direction: column;
    }

    .record-amount {
        align-self: flex-start;
    }
}

/* ========== Load More Button ========== */
.load-more-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem 2rem;
    margin-top: 1rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px var(--shadow);
}

.load-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow);
}

.load-more-btn:active {
    transform: translateY(0);
}

/* ========== Card Animation ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.record-card {
    animation: fadeInUp 0.4s ease forwards;
}