/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 15px;
    width: 100%;
}

@media (min-width: 768px) {
    .container {
        padding: 20px;
    }
}

/* Navigation Bar */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 12px 0;
    margin-bottom: 20px;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.navbar h1 {
    color: #667eea;
    font-size: 1.1rem;
    font-weight: 700;
    flex: 1 1 auto;
    min-width: 200px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.user-info {
    color: #666;
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
}

@media (min-width: 768px) {
    .navbar {
        padding: 15px 0;
        margin-bottom: 30px;
    }

    .nav-container {
        padding: 0 20px;
        gap: 15px;
    }

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

    .nav-right {
        gap: 15px;
    }

    .user-info {
        font-size: 0.95rem;
        max-width: none;
    }
}

/* Login Container */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 15px;
}

.login-box {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 450px;
}

.login-box h1 {
    color: #667eea;
    font-size: 1.4rem;
    margin-bottom: 8px;
    text-align: center;
}

.login-box h2 {
    color: #333;
    font-size: 1.1rem;
    margin-bottom: 25px;
    text-align: center;
    font-weight: 400;
}

@media (min-width: 768px) {
    .login-container {
        padding: 20px;
    }

    .login-box {
        padding: 40px;
    }

    .login-box h1 {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }

    .login-box h2 {
        font-size: 1.3rem;
        margin-bottom: 30px;
    }
}

/* Cards */
.card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.card h2 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.2rem;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    word-wrap: break-word;
}

@media (min-width: 768px) {
    .card {
        padding: 30px;
    }

    .card h2 {
        margin-bottom: 20px;
        font-size: 1.5rem;
    }
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: #555;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-size: 16px;
    /* Prevents zoom on iOS */
    transition: border-color 0.3s;
    -webkit-appearance: none;
    appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.form-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

@media (min-width: 640px) {
    .form-row {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
        margin-bottom: 20px;
    }

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

    .form-group {
        margin-bottom: 20px;
    }

    .form-group label {
        margin-bottom: 8px;
        font-size: 0.95rem;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 12px 15px;
        font-size: 1rem;
    }
}

/* Buttons */
.btn {
    padding: 14px 20px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    min-height: 48px;
    /* Touch-friendly height */
    line-height: 1.2;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover,
.btn-primary:active {
    background: #5568d3;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover,
.btn-secondary:active {
    background: #5a6268;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover,
.btn-success:active {
    background: #218838;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover,
.btn-danger:active {
    background: #c82333;
}

.btn-block {
    width: 100%;
    display: block;
}

.btn-sm {
    padding: 8px 12px;
    font-size: 0.85rem;
    min-height: 36px;
}

/* Mobile-specific button styling */
@media (max-width: 767px) {
    .btn {
        width: 100%;
        margin-bottom: 5px;
    }

    .btn:last-child {
        margin-bottom: 0;
    }

    .form-actions .btn {
        width: 100%;
    }
}

@media (min-width: 768px) {
    .btn {
        padding: 10px 20px;
    }
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
    font-size: 0.85rem;
}

.data-table th {
    background: #667eea;
    color: white;
    padding: 10px 8px;
    text-align: center;
    font-weight: 600;
    font-size: 0.8rem;
}

.data-table td {
    padding: 8px 4px;
    text-align: center;
    border: 1px solid #e0e0e0;
}

.data-table input[type="number"] {
    width: 70px;
    padding: 10px 6px;
    border: 2px solid #e0e0e0;
    border-radius: 4px;
    text-align: center;
    font-size: 16px;
    -webkit-appearance: none;
    appearance: none;
}

.data-table input[type="number"]:focus {
    border-color: #667eea;
    outline: none;
}

/* Mobile form sections - shown on mobile, hidden on desktop */
.mobile-form {
    display: block;
}

.desktop-table {
    display: none;
}

.form-section {
    background: #f8f9fa;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.form-section h3 {
    color: #667eea;
    font-size: 1rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.form-section .form-group {
    margin-bottom: 12px;
}

.form-section .form-group:last-child {
    margin-bottom: 0;
}

.submissions-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    font-size: 0.85rem;
    min-width: 600px;
}

.submissions-table th {
    background: #f8f9fa;
    color: #333;
    padding: 10px 8px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #dee2e6;
    font-size: 0.8rem;
    white-space: nowrap;
}

.submissions-table td {
    padding: 10px 8px;
    border-bottom: 1px solid #dee2e6;
    word-wrap: break-word;
}

.submissions-table tr:hover {
    background: #f8f9fa;
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -20px;
    padding: 0 20px 20px 20px;
}

/* Desktop: Show table, hide mobile form */
@media (min-width: 768px) {
    .mobile-form {
        display: none;
    }

    .desktop-table {
        display: block;
    }

    .data-table {
        font-size: 1rem;
    }

    .data-table th {
        padding: 12px;
        font-size: 1rem;
    }

    .data-table td {
        padding: 10px;
    }

    .data-table input[type="number"] {
        width: 80px;
        padding: 8px;
    }

    .submissions-table {
        font-size: 1rem;
        min-width: auto;
    }

    .submissions-table th {
        padding: 12px;
        font-size: 1rem;
    }

    .submissions-table td {
        padding: 12px;
    }

    .table-responsive {
        margin: 0;
        padding: 0;
    }
}

/* Alerts */
.alert {
    padding: 12px 15px;
    border-radius: 5px;
    margin-bottom: 15px;
    font-weight: 500;
    font-size: 0.9rem;
    word-wrap: break-word;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid #28a745;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

@media (min-width: 768px) {
    .alert {
        padding: 15px 20px;
        margin-bottom: 20px;
        font-size: 1rem;
    }
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    border-top: 4px solid #667eea;
}

.stat-card h3 {
    color: #666;
    font-size: 0.75rem;
    margin-bottom: 8px;
    font-weight: 600;
    text-transform: uppercase;
    line-height: 1.2;
}

.stat-value {
    color: #667eea;
    font-size: 1.5rem;
    font-weight: 700;
}

@media (min-width: 640px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }

    .stat-card {
        padding: 18px;
    }

    .stat-card h3 {
        font-size: 0.85rem;
    }

    .stat-value {
        font-size: 1.8rem;
    }
}

@media (min-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
        margin-bottom: 30px;
    }

    .stat-card {
        padding: 20px;
    }

    .stat-card h3 {
        font-size: 0.9rem;
        margin-bottom: 10px;
    }

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

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-primary {
    background: #667eea;
    color: white;
}

.badge-danger {
    background: #dc3545;
    color: white;
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-muted {
    color: #6c757d;
}

.mt-3 {
    margin-top: 1rem;
}

.mt-4 {
    margin-top: 1.5rem;
}

/* Filter Form */
.filter-form {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
}

@media (min-width: 768px) {
    .filter-form {
        padding: 20px;
    }
}

/* Responsive */
@media (max-width: 767px) {

    /* Force full width on all buttons in action areas */
    .form-actions .btn,
    .submissions-table .btn {
        display: block;
        width: 100%;
        margin-bottom: 8px;
    }

    .submissions-table .btn:last-child {
        margin-bottom: 0;
    }

    /* Stack action buttons vertically */
    .submissions-table td:last-child {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .submissions-table td:last-child form {
        width: 100%;
    }

    /* Better mobile typography */
    body {
        font-size: 14px;
    }

    /* Smaller stat cards on mobile */
    .stat-card {
        min-height: 100px;
    }

    /* More compact cards */
    .card {
        border-radius: 8px;
    }

    /* Better touch targets */
    a,
    button {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .form-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Landscape orientation fixes */
@media (max-height: 500px) and (orientation: landscape) {
    .login-container {
        padding: 10px;
    }

    .login-box {
        padding: 20px;
    }

    .login-box h1 {
        font-size: 1.2rem;
        margin-bottom: 5px;
    }

    .login-box h2 {
        font-size: 1rem;
        margin-bottom: 15px;
    }

    .form-group {
        margin-bottom: 12px;
    }
}

/* Loading State */
.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: #666;
}