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

:root {
    --bg-primary: #0a0f1a;
    --bg-secondary: #111827;
    --bg-card: #1a2332;
    --bg-card-hover: #222d40;
    --accent-primary: #10b981;
    --accent-secondary: #059669;
    --accent-glow: rgba(16, 185, 129, 0.3);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #2d3748;
    --border-light: #374151;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

body {
    font-family: 'Tajawal', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.04) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

/* Grid Pattern Overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

#root {
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.logo-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Stats Bar */
.stats-bar {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.stat-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
}

.stat-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.stat-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon.total { background: rgba(59, 130, 246, 0.2); color: #3b82f6; }
.stat-icon.active { background: rgba(16, 185, 129, 0.2); color: var(--accent-primary); }
.stat-icon.warning { background: rgba(245, 158, 11, 0.2); color: var(--warning); }
.stat-icon.expired { background: rgba(239, 68, 68, 0.2); color: var(--danger); }

.stat-info .stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-info .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Main Container */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Controls Section */
.controls-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 3rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box svg {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-muted);
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    color: var(--text-primary);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-color: transparent;
    color: white;
}

/* Add Button */
.add-btn {
    padding: 0.875rem 1.75rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.add-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.add-btn svg {
    width: 22px;
    height: 22px;
}

/* Apartments Grid */
.apartments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.5rem;
}

/* Apartment Card */
.apartment-card {
    background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.apartment-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.apartment-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-light);
    box-shadow: var(--shadow-lg);
}

.apartment-card:hover::before {
    opacity: 1;
}

.apartment-card.warning {
    border-color: var(--warning);
}

.apartment-card.warning::before {
    background: linear-gradient(90deg, var(--warning), #d97706);
    opacity: 1;
}

.apartment-card.expired {
    border-color: var(--danger);
}

.apartment-card.expired::before {
    background: linear-gradient(90deg, var(--danger), #dc2626);
    opacity: 1;
}

.card-header {
    padding: 1.25rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px solid var(--border-color);
}

.card-apartment-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.apartment-number {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(16, 185, 129, 0.1) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.apartment-card.expired .apartment-number {
    background: var(--danger-bg);
    color: var(--danger);
}

.apartment-card.warning .apartment-number {
    background: var(--warning-bg);
    color: var(--warning);
}

.apartment-name h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.apartment-name span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.action-btn {
    width: 36px;
    height: 36px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
}

.action-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.action-btn.edit:hover {
    border-color: #3b82f6;
    color: #3b82f6;
}

.action-btn.delete:hover {
    border-color: var(--danger);
    color: var(--danger);
}

.action-btn svg {
    width: 18px;
    height: 18px;
}

.card-body {
    padding: 1.25rem 1.5rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.info-item.full-width {
    grid-column: span 2;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-label svg {
    width: 14px;
    height: 14px;
    opacity: 0.7;
}

.info-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 600;
}

.card-footer {
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.days-remaining {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.days-remaining.active {
    color: var(--accent-primary);
}

.days-remaining.warning {
    color: var(--warning);
}

.days-remaining.expired {
    color: var(--danger);
}

.days-badge {
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
}

.days-badge.active {
    background: rgba(16, 185, 129, 0.15);
}

.days-badge.warning {
    background: var(--warning-bg);
}

.days-badge.expired {
    background: var(--danger-bg);
}

.rent-amount {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.rent-amount svg {
    width: 18px;
    height: 18px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to { 
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

.modal-header h2 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.modal-header h2 svg {
    width: 26px;
    height: 26px;
    color: var(--accent-primary);
}

.close-btn {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
}

.close-btn:hover {
    background: var(--danger-bg);
    border-color: var(--danger);
    color: var(--danger);
}

.close-btn svg {
    width: 22px;
    height: 22px;
}

.modal-body {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.optional-tag {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-right: 0.5rem;
}

.modal-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-start;
}

.btn {
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border: none;
    color: white;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-card);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-xl);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.35rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

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

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: toastIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.toast.success {
    border-color: var(--accent-primary);
}

.toast.success .toast-icon {
    color: var(--accent-primary);
}

.toast.error {
    border-color: var(--danger);
}

.toast.error .toast-icon {
    color: var(--danger);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.toast-icon svg {
    width: 24px;
    height: 24px;
}

.toast-message {
    font-weight: 500;
    color: var(--text-primary);
}

/* Delete Confirmation Modal */
.confirm-modal .modal {
    max-width: 400px;
}

.confirm-modal .modal-body {
    text-align: center;
    padding: 2rem 1.5rem;
}

.confirm-icon {
    width: 72px;
    height: 72px;
    background: var(--danger-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.confirm-icon svg {
    width: 36px;
    height: 36px;
    color: var(--danger);
}

.confirm-modal h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.confirm-modal p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.confirm-modal .modal-footer {
    justify-content: center;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    border: none;
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.3);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .apartments-grid {
        grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }

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

    .stats-bar {
        justify-content: center;
    }

    .stat-item {
        flex: 1;
        min-width: 120px;
        justify-content: center;
    }

    .main-container {
        padding: 1rem;
    }

    .controls-section {
        flex-direction: column;
    }

    .search-box {
        max-width: 100%;
    }

    .filter-buttons {
        width: 100%;
        justify-content: center;
    }

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

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

    .info-item.full-width {
        grid-column: span 1;
    }

    .card-footer {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo-text h1 {
        font-size: 1.25rem;
    }

    .stats-bar {
        flex-direction: column;
    }

    .add-btn {
        width: 100%;
        justify-content: center;
    }

    .modal {
        border-radius: var(--radius-lg);
        max-height: 95vh;
    }

    .modal-footer {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}