/**
 * Hospital Management System - Main Stylesheet
 * Modern, professional design with responsive layout
 */

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --dark-color: #1f2937;
    --light-color: #f3f4f6;
    --border-color: #e5e7eb;
    --text-color: #374151;
    --text-muted: #6b7280;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
}

/* ============================================================================
   LAYOUT
   ============================================================================ */

.wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================================================
   NAVIGATION BAR
   ============================================================================ */

.navbar {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 1.5rem;
}

.role-badge {
    font-size: 0.75rem;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-weight: 500;
}

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

.nav-icon {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-color);
    text-decoration: none;
    transition: background-color 0.2s;
}

.nav-icon:hover {
    background-color: var(--light-color);
}

.nav-icon .badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background-color: var(--danger-color);
    color: var(--white);
    font-size: 0.625rem;
    font-weight: 700;
    padding: 0.125rem 0.375rem;
    border-radius: 9999px;
    min-width: 18px;
    text-align: center;
}

.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--white);
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.user-menu-btn:hover {
    background-color: var(--light-color);
}

.user-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    min-width: 200px;
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.user-dropdown.show {
    display: block;
}

.user-dropdown a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    transition: background-color 0.2s;
}

.user-dropdown a:hover {
    background-color: var(--light-color);
}

/* ============================================================================
   MAIN CONTENT & SIDEBAR
   ============================================================================ */

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

.sidebar {
    width: 260px;
    background-color: var(--white);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 0;
    overflow-y: auto;
}

.sidebar-menu {
    list-style: none;
}

.menu-section {
    padding: 0.75rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.2s;
}

.sidebar-menu li a:hover,
.sidebar-menu li a.active {
    background-color: var(--light-color);
    color: var(--primary-color);
    border-left: 3px solid var(--primary-color);
    padding-left: calc(1.5rem - 3px);
}

.sidebar-menu li a i {
    width: 20px;
    text-align: center;
}

.content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* ============================================================================
   CARDS & DASHBOARD
   ============================================================================ */

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--text-muted);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s;
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.blue {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.stat-icon.green {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--secondary-color);
}

.stat-icon.yellow {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.stat-icon.red {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.stat-icon.cyan {
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--info-color);
}

.stat-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.stat-description {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ============================================================================
   CARDS
   ============================================================================ */

.card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--dark-color);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--light-color);
}

/* ============================================================================
   FORMS
   ============================================================================ */

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-label.required::after {
    content: ' *';
    color: var(--danger-color);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.form-control:disabled {
    background-color: var(--light-color);
    cursor: not-allowed;
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

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

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

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

.btn-success:hover {
    background-color: #059669;
}

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

.btn-danger:hover {
    background-color: #dc2626;
}

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

.btn-warning:hover {
    background-color: #d97706;
}

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

.btn-secondary:hover {
    background-color: #4b5563;
}

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

.btn-outline:hover {
    background-color: var(--light-color);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-group {
    display: flex;
    gap: 0.75rem;
}

/* ============================================================================
   TABLES
   ============================================================================ */

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

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

table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--dark-color);
    border-bottom: 2px solid var(--border-color);
}

table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

table tbody tr:hover {
    background-color: rgba(37, 99, 235, 0.02);
}

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

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

/* ============================================================================
   ALERTS
   ============================================================================ */

.alert {
    padding: 1rem 1.25rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--secondary-color);
    color: #065f46;
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger-color);
    color: #991b1b;
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning-color);
    color: #92400e;
}

.alert-info {
    background-color: rgba(6, 182, 212, 0.1);
    border: 1px solid var(--info-color);
    color: #0e7490;
}

/* ============================================================================
   BADGES
   ============================================================================ */

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
}

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

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

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

.badge-warning {
    background-color: var(--warning-color);
    color: var(--white);
}

.badge-info {
    background-color: var(--info-color);
    color: var(--white);
}

.badge-secondary {
    background-color: var(--text-muted);
    color: var(--white);
}

/* ============================================================================
   PAGINATION
   ============================================================================ */

.pagination {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 2rem;
}

.pagination a,
.pagination span {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.2s;
}

.pagination a:hover {
    background-color: var(--light-color);
}

.pagination span.current {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* ============================================================================
   LOGIN PAGE
   ============================================================================ */

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    width: 100%;
    max-width: 440px;
    background-color: var(--white);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 3rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    background-color: var(--primary-color);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2rem;
}

.login-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--text-muted);
}

/* ============================================================================
   UTILITIES
   ============================================================================ */

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-muted {
    color: var(--text-muted);
}

.text-primary {
    color: var(--primary-color);
}

.text-success {
    color: var(--secondary-color);
}

.text-danger {
    color: var(--danger-color);
}

.text-warning {
    color: var(--warning-color);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }

    .content {
        padding: 1rem;
    }

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

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

    .nav-container {
        padding: 0 1rem;
    }

    .user-menu-btn span {
        display: none;
    }
}