/* Modern Dynamic CSS Design System */
:root {
    --bg-main: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-card-hover: rgba(30, 41, 59, 0.9);
    --border-color: rgba(255, 255, 255, 0.1);
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-glow: rgba(59, 130, 246, 0.4);
    
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --purple: #8b5cf6;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dark: #64748b;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    
    --shadow-soft: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.25);
    
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
}

body {
    background: radial-gradient(circle at top right, #1e1b4b, #0f172a 60%);
    color: var(--text-main);
    min-height: 100vh;
    padding: 24px;
    display: flex;
    justify-content: center;
}

.app-container {
    width: 100%;
    max-width: 1400px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 28px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--purple));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.brand h1 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 13px;
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.security-badge {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Stats Overview */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.stat-icon.blue { background: rgba(59, 130, 246, 0.2); color: var(--primary); }
.stat-icon.green { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.stat-icon.purple { background: rgba(139, 92, 246, 0.2); color: var(--purple); }
.stat-icon.orange { background: rgba(245, 158, 11, 0.2); color: var(--warning); }

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    margin-top: 2px;
}

/* Main Layout */
.main-content {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 24px;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Card Styles */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-soft);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-main);
}

.card-badge {
    background: rgba(59, 130, 246, 0.2);
    color: var(--primary);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 12px;
}

/* Form Styles */
.log-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

input, select, textarea {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text-main);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.readonly-input {
    background: rgba(15, 23, 42, 0.9);
    color: var(--primary);
    font-weight: 700;
    border-style: dashed;
}

/* Buttons */
.btn {
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #2563eb);
    color: white;
    box-shadow: var(--shadow-glow);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.18);
}

.btn-block {
    width: 100%;
    margin-top: 8px;
    padding: 14px;
}

/* Alert Box */
.alert-box {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
}

.alert-box.danger {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-box.success {
    background: rgba(16, 185, 129, 0.15);
    color: #6ee7b7;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.hidden { display: none; }

/* Table Search & Wrapper */
.table-search {
    position: relative;
    width: 260px;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dark);
}

.table-search input {
    width: 100%;
    padding-left: 36px;
    background: rgba(15, 23, 42, 0.7);
}

.table-wrapper {
    overflow-x: auto;
}

.log-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 13px;
}

.log-table th {
    padding: 12px 14px;
    background: rgba(15, 23, 42, 0.6);
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.log-table td {
    padding: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.log-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

.tag-badge {
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    display: inline-block;
}

.tag-business { background: rgba(59, 130, 246, 0.2); color: #93c5fd; }
.tag-commute { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }
.tag-personal { background: rgba(139, 92, 246, 0.2); color: #c4b5fd; }
.tag-maintenance { background: rgba(245, 158, 11, 0.2); color: #fde68a; }

.btn-delete {
    background: transparent;
    border: none;
    color: var(--text-dark);
    cursor: pointer;
    font-size: 15px;
    transition: var(--transition);
}

.btn-delete:hover {
    color: var(--danger);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 40px;
    color: var(--text-dark);
    margin-bottom: 12px;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 16px;
    color: var(--text-dark);
    font-size: 12px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

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

/* 목록 최근 갱신 시각 */
.last-updated {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-left: 0.75rem;
    white-space: nowrap;
}