/* ========================================
   AI Reconciliation - Main Stylesheet
   ======================================== */

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --info: #0891b2;
    --info-light: #cffafe;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --sidebar-width: 250px;
    --header-height: 60px;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--gray-800);
    background: var(--gray-50);
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); text-decoration: underline; }

/* === Layout === */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--gray-900);
    color: var(--white);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    padding: 20px;
    font-size: 18px;
    font-weight: 700;
    border-bottom: 1px solid var(--gray-700);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-brand span { color: var(--primary); }

.sidebar-nav { padding: 10px 0; }

.nav-item {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    color: var(--gray-300);
    font-size: 14px;
    gap: 10px;
    transition: all 0.15s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--gray-800);
    color: var(--white);
    text-decoration: none;
}

.nav-item.active {
    background: var(--gray-800);
    color: var(--white);
    border-left-color: var(--primary);
}

.nav-item .nav-icon { width: 20px; text-align: center; font-size: 16px; }

.nav-section {
    padding: 15px 20px 5px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-500);
}

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.header {
    height: var(--header-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left { display: flex; align-items: center; gap: 12px; }
.header-right { display: flex; align-items: center; gap: 16px; }

.user-info { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.user-name { font-weight: 600; color: var(--gray-800); }

.content-area { padding: 24px; flex: 1; }

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.page-subtitle {
    font-size: 14px;
    color: var(--gray-500);
    margin-top: 4px;
}

/* === Cards === */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    font-weight: 600;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body { padding: 20px; }

.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    border-left: 4px solid var(--primary);
}

.stat-card.success { border-left-color: var(--success); }
.stat-card.warning { border-left-color: var(--warning); }
.stat-card.danger { border-left-color: var(--danger); }
.stat-card.info { border-left-color: var(--info); }

.stat-card-title {
    font-size: 13px;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 8px;
}

.stat-card-value { font-size: 28px; font-weight: 700; color: var(--gray-900); }
.stat-card-subtitle { font-size: 12px; color: var(--gray-400); margin-top: 4px; }

/* === Tables === */
.table-wrapper { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

thead th {
    background: var(--gray-50);
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--gray-600);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
}

tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
}

tbody tr:hover { background: var(--gray-50); }

.row-matched { background: var(--success-light) !important; }
.row-mismatched { background: var(--warning-light) !important; }
.row-missing { background: var(--danger-light) !important; }

/* === Badges === */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.5;
}

.badge-primary { background: var(--primary-light); color: var(--primary-dark); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-info { background: var(--info-light); color: var(--info); }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s;
    text-decoration: none;
    line-height: 1.4;
}

.btn:hover { text-decoration: none; }

.btn-primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); color: var(--white); }

.btn-success { background: var(--success); color: var(--white); }
.btn-success:hover { background: #15803d; color: var(--white); }

.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #b91c1c; color: var(--white); }

.btn-outline {
    background: var(--white);
    color: var(--gray-700);
    border-color: var(--gray-300);
}
.btn-outline:hover { background: var(--gray-50); color: var(--gray-700); }

.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* === Forms === */
.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 4px;
    font-size: 14px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
    color: var(--gray-800);
    background: var(--white);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input.is-invalid { border-color: var(--danger); }
.form-error { color: var(--danger); font-size: 13px; margin-top: 4px; }
.form-hint { color: var(--gray-400); font-size: 13px; margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-check input[type="checkbox"] { width: 16px; height: 16px; }

/* === File Upload === */
.upload-zone {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--gray-50);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.upload-zone-icon { font-size: 40px; color: var(--gray-400); margin-bottom: 12px; }
.upload-zone-text { font-size: 14px; color: var(--gray-600); margin-bottom: 4px; }
.upload-zone-hint { font-size: 12px; color: var(--gray-400); }
.upload-zone-file { margin-top: 12px; font-size: 13px; color: var(--success); font-weight: 500; }

/* === Tabs === */
.tabs { display: flex; border-bottom: 2px solid var(--gray-200); margin-bottom: 20px; gap: 0; }

.tab {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-500);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tab:hover { color: var(--gray-700); }

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab .count {
    background: var(--gray-100);
    padding: 1px 6px;
    border-radius: 9999px;
    font-size: 12px;
}

.tab.active .count { background: var(--primary-light); color: var(--primary); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* === Flash Messages === */
.flash {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    animation: flashIn 0.3s ease;
}

.flash-success { background: var(--success-light); color: #166534; border: 1px solid #bbf7d0; }
.flash-error { background: var(--danger-light); color: #991b1b; border: 1px solid #fecaca; }
.flash-warning { background: var(--warning-light); color: #92400e; border: 1px solid #fde68a; }
.flash-info { background: var(--info-light); color: #155e75; border: 1px solid #a5f3fc; }

.flash-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    opacity: 0.5;
    color: inherit;
}

.flash-close:hover { opacity: 1; }

@keyframes flashIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

/* === Processing Spinner === */
.processing-container { text-align: center; padding: 60px 20px; }

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 20px;
}

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

.processing-text { font-size: 18px; color: var(--gray-700); margin-bottom: 8px; }
.processing-status { font-size: 14px; color: var(--gray-500); }

/* === Pagination === */
.pagination { display: flex; gap: 4px; align-items: center; justify-content: center; margin-top: 20px; }

.pagination a, .pagination span {
    padding: 6px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
    color: var(--gray-600);
}

.pagination a:hover { background: var(--gray-50); text-decoration: none; }
.pagination .active { background: var(--primary); color: var(--white); border-color: var(--primary); }
.pagination .disabled { opacity: 0.5; cursor: default; }

/* === Auth Layout === */
.auth-layout {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--primary-light) 100%);
}

.auth-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 40px;
    width: 100%;
    max-width: 440px;
}

.auth-brand {
    text-align: center;
    margin-bottom: 32px;
}

.auth-brand h1 { font-size: 24px; color: var(--gray-900); }
.auth-brand p { color: var(--gray-500); font-size: 14px; margin-top: 4px; }

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--gray-500);
}

/* === Empty State === */
.empty-state { text-align: center; padding: 60px 20px; color: var(--gray-400); }
.empty-state-icon { font-size: 48px; margin-bottom: 16px; }
.empty-state-text { font-size: 16px; margin-bottom: 8px; }

/* === Filters === */
.filter-bar {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-bar .form-select { width: auto; min-width: 150px; }

/* === Utilities === */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--gray-500); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.font-mono { font-family: 'SF Mono', 'Fira Code', monospace; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.hidden { display: none; }

/* === Mobile Toggle === */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray-600);
}

/* === Responsive === */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .sidebar-toggle { display: block; }
    .main-content { margin-left: 0; }
    .form-row { grid-template-columns: 1fr; }
    .stat-cards { grid-template-columns: 1fr 1fr; }
    .filter-bar { flex-direction: column; align-items: stretch; }
}

@media (max-width: 480px) {
    .stat-cards { grid-template-columns: 1fr; }
    .content-area { padding: 16px; }
    .auth-card { margin: 16px; padding: 24px; }
}