* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: #F1F5F9;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s, color 0.3s;
}

body.dark-theme {
    background: #0F172A;
    color: #F1F5F9;
}

.top-nav {
    background: linear-gradient(90deg, #0F52BA, #1E40AF);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.dark-theme .top-nav {
    background: linear-gradient(90deg, #1e3a8a, #1e1b4b);
}

.logo h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.logo p {
    font-size: 0.8rem;
    opacity: 0.9;
}

.nav-links {
    display: flex;
    gap: 1rem;
}

.nav-link {
    background: transparent;
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
}

.nav-link:hover {
    background: rgba(255,255,255,0.2);
}

.nav-link.active {
    background: rgba(255,255,255,0.3);
    font-weight: 600;
}

.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.card {
    background: white;
    border-radius: 12px;
    border: 1px solid #E2E8F0;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: background-color 0.3s, border-color 0.3s;
}

.dark-theme .card {
    background: #1E293B;
    border-color: #334155;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.card-header h3 {
    color: #0F52BA;
    font-size: 1.3rem;
    font-weight: 600;
}

.dark-theme .card-header h3 {
    color: #60A5FA;
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    border: none;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: #0F52BA;
    color: white;
}

.btn-primary:hover {
    background: #1E40AF;
}

.dark-theme .btn-primary {
    background: #2563EB;
}

.dark-theme .btn-primary:hover {
    background: #1D4ED8;
}

.btn-success {
    background: #10B981;
    color: white;
}

.btn-success:hover {
    background: #0DA271;
}

.dark-theme .btn-success {
    background: #059669;
}

.dark-theme .btn-success:hover {
    background: #047857;
}

.btn-warning {
    background: #F59E0B;
    color: white;
}

.btn-warning:hover {
    background: #D97706;
}

.dark-theme .btn-warning {
    background: #D97706;
}

.dark-theme .btn-warning:hover {
    background: #B45309;
}

.btn-danger {
    background: #EF4444;
    color: white;
}

.btn-danger:hover {
    background: #DC2626;
}

.dark-theme .btn-danger {
    background: #DC2626;
}

.dark-theme .btn-danger:hover {
    background: #B91C1C;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: #1E293B;
}

.dark-theme label {
    color: #E2E8F0;
}

input, select, textarea {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid #CBD5E1;
    border-radius: 6px;
    font-size: 0.95rem;
    background: white;
    color: #1E293B;
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}

.dark-theme input,
.dark-theme select,
.dark-theme textarea {
    background: #0F172A;
    border-color: #334155;
    color: #F1F5F9;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #0F52BA;
    box-shadow: 0 0 0 3px rgba(15,82,186,0.1);
}

.dark-theme input:focus,
.dark-theme select:focus,
.dark-theme textarea:focus {
    border-color: #60A5FA;
    box-shadow: 0 0 0 3px rgba(96,165,250,0.2);
}

.radio-group {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: normal;
}

.progress {
    height: 6px;
    background: #E2E8F0;
    border-radius: 3px;
    margin: 1rem 0;
    overflow: hidden;
    display: none;
}

.dark-theme .progress {
    background: #334155;
}

.progress-bar {
    height: 100%;
    background: #0F52BA;
    width: 0%;
    transition: width 0.3s;
}

.dark-theme .progress-bar {
    background: #60A5FA;
}

.message {
    margin-top: 1rem;
    padding: 0.8rem;
    border-radius: 6px;
    display: none;
    font-weight: 500;
}

.message.success {
    background: #D1FAE5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.dark-theme .message.success {
    background: #064E3B;
    color: #D1FAE5;
    border-color: #065F46;
}

.message.error {
    background: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.dark-theme .message.error {
    background: #7F1D1D;
    color: #FEE2E2;
    border-color: #991B1B;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.dark-theme .modal-content {
    background: #1E293B;
    border: 1px solid #334155;
}

.modal-content h3 {
    color: #0F52BA;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.dark-theme .modal-content h3 {
    color: #60A5FA;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    justify-content: flex-end;
}

.modal-actions .btn {
    min-width: 80px;
}

@media (max-width: 768px) {
    .top-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    .nav-links {
        flex-wrap: wrap;
    }
}/* common styles */
/* Dark theme – add to base.css or as dark-theme.css */
.dark-theme {
    --bg-primary: #1a1f2e;
    --bg-secondary: #242a3a;
    --bg-card: #2d3445;
    --bg-input: #2d3445;
    --border-color: #3f4a5c;
    --text-primary: #e9edf2;
    --text-secondary: #b0c0d0;
    --text-muted: #7e8b9f;
    --accent-primary: #2a3f6e;
    --accent-hover: #34518c;
    --accent-success: #1e5f2e;
    --accent-success-hover: #2a7a3a;
    --accent-warning: #b85c1a;
    --accent-danger: #b00020;
}

.dark-theme body {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Cards */
.dark-theme .card {
    background: var(--bg-card);
    border-color: var(--border-color);
}

.dark-theme .card-header h3 {
    background: linear-gradient(135deg, #a0b8d4, #c0d0e8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Quick actions */
.dark-theme .action-card {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.dark-theme .action-card:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
}

/* Features */
.dark-theme .feature-item {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

.dark-theme .feature-item b {
    color: var(--text-primary);
}

.dark-theme .feature-item small {
    color: var(--text-secondary);
}

/* Activity log */
.dark-theme .activity-log {
    background: var(--bg-secondary);
}

.dark-theme .activity-item {
    border-bottom-color: var(--border-color);
}

.dark-theme .activity-text {
    color: var(--text-primary);
}

.dark-theme .activity-time {
    background: var(--accent-primary);
    color: white;
}

/* Top navigation */
.dark-theme .top-nav {
    background: var(--bg-card);
    border-color: var(--border-color);
}

.dark-theme .logo h2 {
    background: linear-gradient(135deg, #a0b8d4, #c0d0e8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dark-theme .nav-link {
    color: var(--text-primary);
}

.dark-theme .nav-link:hover {
    background: var(--bg-secondary);
    color: white;
}

.dark-theme .nav-link.active {
    background: var(--accent-primary);
    color: white;
}

/* Form elements */
.dark-theme .form-group label {
    color: var(--text-secondary);
}

.dark-theme .file-input,
.dark-theme .form-select,
.dark-theme .form-input {
    background: var(--bg-input);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.dark-theme .file-input:hover,
.dark-theme .form-select:hover,
.dark-theme .form-input:hover {
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
}

/* Voucher type buttons */
.dark-theme .voucher-type-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.dark-theme input[type="radio"]:checked + .voucher-type-btn {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

/* Buttons */
.dark-theme .btn-primary {
    background: var(--accent-primary);
}

.dark-theme .btn-primary:hover {
    background: var(--accent-hover);
}

.dark-theme .btn-success {
    background: var(--accent-success);
}

.dark-theme .btn-success:hover {
    background: var(--accent-success-hover);
}

.dark-theme .btn-warning {
    background: var(--accent-warning);
}

.dark-theme .btn-danger {
    background: var(--accent-danger);
}

/* Progress bar */
.dark-theme .progress {
    background: var(--bg-secondary);
}

.dark-theme .progress-bar {
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-hover));
}

/* Messages */
.dark-theme .message.success {
    background: #1e3a2a;
    color: #b8f0c0;
    border-color: #2a5a34;
}

.dark-theme .message.error {
    background: #3a1e1e;
    color: #ffb3b3;
    border-color: #b00020;
}

/* Mapping editor panels */
.dark-theme .company-panel,
.dark-theme .group-panel,
.dark-theme .rate-panel {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

.dark-theme .company-item,
.dark-theme .group-item {
    background: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.dark-theme .company-item.active,
.dark-theme .group-item.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.dark-theme .rate-item {
    background: var(--bg-card);
    border-color: var(--border-color);
}

.dark-theme .rate-percent {
    background: var(--accent-primary);
    color: white;
}

.dark-theme .rate-ledger {
    color: var(--text-primary);
}

/* Modals */
.dark-theme .modal-content {
    background: var(--bg-card);
    border-color: var(--border-color);
}

.dark-theme .modal-title {
    color: var(--text-primary);
}

/* Scrollbars (optional) */
.dark-theme ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.dark-theme ::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.dark-theme ::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.dark-theme ::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}