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

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --danger-color: #dc2626;
    --success-color: #16a34a;
    --warning-color: #ea580c;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-color: #1e293b;
    --text-light: #64748b;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

html, body {
    height: 100%;
    width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-color);
    line-height: 1.6;
}

/* ============ LOGIN PAGE ============ */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1e40af 100%);
    padding: 1rem;
}

.login-box {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    text-align: center;
}

.subtitle {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 0.95rem;
    text-align: center;
}

.demo-note {
    background-color: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 1rem;
    margin-top: 1.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    color: #92400e;
}

/* ============ CONTAINER & LAYOUT ============ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    background: white;
    border-bottom: 2px solid var(--border-color);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    gap: 1rem;
}

.header h1 {
    font-size: 1.75rem;
    color: var(--text-color);
    margin: 0;
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-left: auto;
}

.user-info {
    color: var(--text-light);
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    background-color: var(--light-bg);
    border-radius: 6px;
}

.main-content {
    padding: 2rem;
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* ============ CARDS & SUMMARY ============ */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border-left: 5px solid var(--primary-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card h3 {
    font-size: 0.85rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
    font-weight: 600;
}

.card-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

/* ============ SECTIONS ============ */
.section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.section h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
    font-weight: 600;
}

.section-hint {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    font-style: italic;
}

/* ============ FORMS ============ */
.expense-form {
    max-width: 100%;
}

.form-section {
    margin-bottom: 2.5rem;
}

.form-section h2 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.75rem;
    font-weight: 600;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    position: relative;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-size: 0.95rem;
}

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

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

.form-group input:disabled,
.form-group select:disabled {
    background-color: var(--light-bg);
    cursor: not-allowed;
}

/* ============ ATTENDEES ============ */
.attendees-container {
    display: grid;
    gap: 1.5rem;
}

.attendee-row {
    background-color: var(--light-bg);
    padding: 1.5rem;
    border-radius: 6px;
    border-left: 4px solid var(--primary-color);
}

.attendee-number {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

/* ============ BUTTONS ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    gap: 0.5rem;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

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

.btn-danger:hover {
    background-color: #b91c1c;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.form-actions form {
    display: inline;
}

/* ============ ALERTS ============ */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    font-weight: 500;
}

.alert-error {
    background-color: #fee2e2;
    border-left-color: var(--danger-color);
    color: #991b1b;
}

.alert-success {
    background-color: #dcfce7;
    border-left-color: var(--success-color);
    color: #166534;
}

/* ============ TABLES ============ */
.table-responsive {
    overflow-x: auto;
    border-radius: 6px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.table thead {
    background-color: var(--light-bg);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr {
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: var(--light-bg);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ============ DETAIL GRID ============ */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.detail-item label {
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
    margin-bottom: 0.5rem;
}

.detail-item p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin: 0;
}

/* ============ EMPTY STATE ============ */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

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

.empty-state a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.empty-state a:hover {
    text-decoration: underline;
}

/* ============ ACTIONS ============ */
.actions {
    margin-bottom: 2rem;
}

/* ============ LOGIN FORM ============ */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ============ AUTOCOMPLETE SUGGESTIONS ============ */
.suggestions-list {
    position: absolute;
    background: white;
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 6px 6px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    width: 100%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: none;
    top: 100%;
    left: 0;
}

.suggestions-list.active {
    display: block;
}

.suggestion-item {
    padding: 0.75rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    transition: background-color 0.2s;
}

.suggestion-item:hover {
    background-color: var(--light-bg);
}

.suggestion-item:last-child {
    border-bottom: none;
}

/* ============ RESPONSIVE DESIGN ============ */
@media (max-width: 1024px) {
    .main-content {
        padding: 1.5rem;
    }
    
    .summary-cards {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
        margin-left: 0;
    }

    .main-content {
        padding: 1rem;
    }

    .summary-cards {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .card {
        padding: 1.5rem;
    }

    .card-value {
        font-size: 2rem;
    }

    .section {
        padding: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .table {
        font-size: 0.85rem;
    }

    .table th,
    .table td {
        padding: 0.75rem;
    }

    .detail-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0.75rem;
    }

    .header h1 {
        font-size: 1.25rem;
    }

    .main-content {
        padding: 0.75rem;
    }

    .card {
        padding: 1rem;
    }

    .card-value {
        font-size: 1.75rem;
    }

    .card h3 {
        font-size: 0.75rem;
    }

    .section {
        padding: 1rem;
    }

    .section h2 {
        font-size: 1.25rem;
    }

    .form-group label {
        font-size: 0.9rem;
    }

    .form-group input,
    .form-group select {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .table {
        font-size: 0.75rem;
    }

    .table th,
    .table td {
        padding: 0.5rem;
    }
}

/* ============ MOBILE REPORT TABLE ============ */
@media (max-width: 768px) {
    /* Hide weekly date columns in report tables - keep #, Name/Employee/Client, Total, Events */
    .data-table th.weekly-col,
    .data-table td.weekly-col {
        display: none;
    }

    /* Show the mobile note under report tables */
    .mobile-report-note {
        display: block;
    }
}

/* Mobile note is hidden by default (desktop) */
.mobile-report-note {
    display: none;
    font-style: italic;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.5rem;
    padding: 0.25rem 0;
}

/* ============ PRINT STYLES ============ */
@media print {
    .header,
    .form-actions,
    .btn {
        display: none;
    }

    .section {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }

    body {
        background: white;
    }
}