:root {
    --gold: #c9a227;
    --gold-dark: #9a7b1a;
    --gold-light: #f5e6b8;
    --bg: #1a1a2e;
    --bg-card: #16213e;
    --bg-input: #0f3460;
    --text: #eaeaea;
    --text-muted: #a0a0b0;
    --border: #2a3a5c;
    --success: #2ecc71;
    --danger: #e74c3c;
    --info: #3498db;
    --radius: 8px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, var(--bg) 0%, #0f0f23 100%);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

a {
    color: var(--gold);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Home */
.home-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.home-container {
    text-align: center;
    max-width: 800px;
}

.home-container h1 {
    font-size: 2.5rem;
    color: var(--gold);
    margin-bottom: 0.5rem;
}

.home-container .subtitle {
    color: var(--text-muted);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.app-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.app-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: transform 0.2s, border-color 0.2s;
    text-decoration: none;
    color: inherit;
    display: block;
}

.app-card:hover {
    transform: translateY(-4px);
    border-color: var(--gold);
    text-decoration: none;
}

.app-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.app-card h2 {
    color: var(--gold);
    margin-bottom: 0.5rem;
}

.app-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* App layout */
.app-header {
    background: var(--bg-card);
    border-bottom: 2px solid var(--gold-dark);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.app-header h1 {
    font-size: 1.4rem;
    color: var(--gold);
}

.app-header .back-link {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Cards & sections */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow);
}

.card-title {
    font-size: 1rem;
    color: var(--gold);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.6rem 0.75rem;
    color: var(--text);
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--gold);
}

.form-group input[readonly]:not(.calc-field) {
    background: #0a2540;
    color: var(--text-muted);
    cursor: default;
}

.form-group input.calc-field[readonly],
.form-group input[readonly].calc-field {
    background: #1a3a2a;
    border-color: #2d5a3d;
    color: var(--success);
    font-weight: 600;
}

.form-status {
    margin: -0.5rem 0 1rem;
    padding: 0.6rem 1rem;
    background: rgba(201, 162, 39, 0.12);
    border: 1px solid var(--gold-dark);
    border-radius: 6px;
    color: var(--gold-light);
    font-size: 0.9rem;
}

.form-group select:disabled,
.form-group textarea[readonly] {
    background: #0a2540;
    color: var(--text-muted);
    cursor: default;
}

.form-group input.calc-field {
    background: #1a3a2a;
    border-color: #2d5a3d;
    color: var(--success);
    font-weight: 600;
}

.form-group input.type-receives {
    color: var(--success);
}

.form-group input.type-pays {
    color: var(--danger);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 1.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--gold);
}

/* Buttons */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    padding: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.btn {
    padding: 0.55rem 1.1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary { background: var(--gold); color: #1a1a2e; }
.btn-primary:hover { background: var(--gold-dark); color: #fff; }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #27ae60; }

.btn-warning { background: #f39c12; color: #1a1a2e; }
.btn-warning:hover { background: #d68910; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c0392b; }

.btn-info { background: var(--info); color: #fff; }
.btn-info:hover { background: #2980b9; }

.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #3a4a6c; }

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Search modal */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 700px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--gold);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.modal-body {
    padding: 1rem 1.25rem;
    overflow-y: auto;
}

.search-input-wrap {
    margin-bottom: 1rem;
}

.search-input-wrap input {
    width: 100%;
    padding: 0.65rem 0.75rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
}

.search-results {
    list-style: none;
}

.search-results li {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.15s;
}

.search-results li:hover {
    background: var(--bg-input);
}

.search-results .voucher-no {
    color: var(--gold);
    font-weight: 600;
}

.search-results .meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 0.85rem 1.25rem;
    border-radius: 6px;
    color: #fff;
    font-weight: 500;
    z-index: 2000;
    animation: slideIn 0.3s ease;
    box-shadow: var(--shadow);
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Login */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1.5rem;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

.login-brand {
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.login-brand h1 {
    color: var(--gold);
    font-size: 1.5rem;
}

.login-brand p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

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

.btn-block {
    width: 100%;
    justify-content: center;
    margin-top: 0.5rem;
}

.login-hint {
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* User bar */
.user-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.user-avatar {
    font-size: 1.2rem;
}

.user-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
}

.home-top-bar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1.5rem;
}

.profile-grid {
    display: grid;
    gap: 1.25rem;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: -0.5rem 0 1rem;
}

.profile-divider label {
    color: var(--gold);
    font-weight: 600;
    border-top: 1px solid var(--border);
    padding-top: 0.75rem;
    display: block;
}

.page-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.page-tab {
    padding: 0.55rem 1.1rem;
    border-radius: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: border-color 0.2s, color 0.2s;
}

.page-tab:hover {
    border-color: var(--gold);
    color: var(--gold);
    text-decoration: none;
}

.page-tab.active {
    background: var(--gold);
    border-color: var(--gold);
    color: #1a1a2e;
    font-weight: 600;
}

.receipt-preview-card {
    margin-top: 1.25rem;
}

.receipt-preview {
    background: #fff;
    color: #222;
    padding: 1.5rem;
    border-radius: 6px;
    text-align: center;
    font-family: 'Courier New', monospace;
}

.receipt-preview h3 {
    font-size: 1.2rem;
    margin-bottom: 0.35rem;
}

.receipt-preview p {
    font-size: 0.85rem;
    margin: 0.2rem 0;
    color: #444;
}

/* Install */
.install-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.install-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    max-width: 480px;
    text-align: center;
}

.install-card h1 {
    color: var(--gold);
    margin-bottom: 1rem;
}

.alert {
    padding: 0.85rem;
    border-radius: 6px;
    margin: 1rem 0;
    font-size: 0.9rem;
}

.alert-success {
    background: rgba(46, 204, 113, 0.15);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-error {
    background: rgba(231, 76, 60, 0.15);
    border: 1px solid var(--danger);
    color: var(--danger);
}

/* Print receipt */
@media print {
    body * {
        visibility: hidden;
    }

    .print-area, .print-area * {
        visibility: visible;
    }

    .print-area {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        background: #fff !important;
        color: #000 !important;
        padding: 20px;
    }

    .no-print {
        display: none !important;
    }
}

.receipt {
    display: none;
    background: #fff;
    color: #000;
    padding: 2rem;
    max-width: 600px;
    margin: 0 auto;
    font-family: 'Courier New', monospace;
}

.receipt.active {
    display: block;
}

.receipt-header {
    text-align: center;
    border-bottom: 2px solid #000;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}

.receipt-header h2 {
    font-size: 1.4rem;
    margin-bottom: 0.25rem;
}

.receipt-row {
    display: flex;
    justify-content: space-between;
    padding: 0.35rem 0;
    border-bottom: 1px dotted #ccc;
}

.receipt-row.total {
    font-weight: bold;
    font-size: 1.1rem;
    border-bottom: 2px solid #000;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
}

.receipt-signature {
    margin-top: 3rem;
    display: flex;
    justify-content: space-between;
}

.receipt-signature div {
    width: 40%;
    border-top: 1px solid #000;
    text-align: center;
    padding-top: 0.5rem;
    font-size: 0.85rem;
}

@media (max-width: 600px) {
    .form-grid {
        grid-template-columns: 1fr;
    }

    .toolbar {
        justify-content: center;
    }

    .app-header {
        flex-direction: column;
        text-align: center;
    }
}