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

:root {
    --gs-green: #00ae58;
    --gs-green-dark: #008a46;
    --gs-green-light: #e8f5ee;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --red-500: #ef4444;
    --yellow-500: #f59e0b;
    --yellow-100: #fef3c7;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: linear-gradient(135deg, var(--gs-green) 0%, var(--gs-green-dark) 100%);
    color: white;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-content h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.header-content p {
    opacity: 0.9;
    font-size: 1.1rem;
}

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

.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gs-green);
}

.stat-label {
    color: var(--gray-500);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: center;
}

.search-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    flex: 1;
}

.search-filter input,
.search-filter select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-size: 1rem;
    background: white;
}

.search-filter input {
    min-width: 200px;
    flex: 1;
}

.search-filter select {
    min-width: 150px;
}

.search-filter input:focus,
.search-filter select:focus {
    outline: none;
    border-color: var(--gs-green);
    box-shadow: 0 0 0 3px var(--gs-green-light);
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--gs-green-dark);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-danger {
    background: var(--red-500);
    color: white;
}

.btn-small {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.equipment-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.2s;
}

.equipment-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

.card-category {
    background: var(--gs-green-light);
    color: var(--gs-green-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.card-details {
    margin-bottom: 1rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray-100);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.detail-value {
    font-weight: 500;
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-available {
    background: var(--gs-green-light);
    color: var(--gs-green-dark);
}

.status-checked-out {
    background: #fee2e2;
    color: #dc2626;
}

.status-maintenance {
    background: var(--yellow-100);
    color: #b45309;
}

.card-notes {
    background: var(--gray-50);
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--gray-700);
    margin-bottom: 1rem;
}

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

.card-actions .btn {
    flex: 1;
    min-width: 80px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 16px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-small {
    max-width: 400px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
    font-size: 1.25rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
    padding: 0.5rem;
    line-height: 1;
}

.close-btn:hover {
    color: var(--gray-900);
}

form {
    padding: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--gs-green);
    box-shadow: 0 0 0 3px var(--gs-green-light);
}

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

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.checkout-item-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--gs-green-dark);
}

footer {
    background: var(--gray-900);
    color: var(--gray-300);
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--gray-500);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 1.5rem;
    }

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

    main {
        padding: 1rem;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .controls .btn {
        width: 100%;
    }

    .search-filter {
        flex-direction: column;
    }

    .search-filter input,
    .search-filter select {
        width: 100%;
    }

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

    .equipment-grid {
        grid-template-columns: 1fr;
    }
}