@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
    /* Brand Colors */
    --primary: #16A34A;
    --primary-hover: #15803D;
    --primary-dark: #166534;
    --primary-soft: #ECFDF3;

    /* Interface Colors */
    --bg-page: #F6F8FA;
    --bg-card: #FFFFFF;
    --bg-sidebar: #0F172A; /* Premium Dark Sidebar */
    --bg-sidebar-hover: #1E293B;
    
    /* Text Colors */
    --text-main: #0F172A;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --text-sidebar: #CBD5E1;
    --text-sidebar-active: #FFFFFF;
    
    /* State Colors */
    --success: #16A34A;
    --success-bg: #DCFCE7;
    --warning: #D97706;
    --warning-bg: #FEF3C7;
    --danger: #DC2626;
    --danger-bg: #FEE2E2;
    --info: #2563EB;
    --info-bg: #DBEAFE;
    
    /* Borders & Dividers */
    --border-color: #E2E8F0;
    --border-light: #F1F5F9;
    
    /* Shadows (Extremely subtle and premium) */
    --shadow-sm: 0 1px 2px rgba(15,23,42,0.04);
    --shadow-md: 0 4px 6px -1px rgba(15,23,42,0.06), 0 2px 4px -1px rgba(15,23,42,0.04);
    --shadow-lg: 0 10px 15px -3px rgba(15,23,42,0.08), 0 4px 6px -2px rgba(15,23,42,0.04);
    --shadow-focus: 0 0 0 3px rgba(22,163,74,0.15);
    
    /* Border Radii */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Spacing Scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    /* Typography */
    --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

/* ================= RESET ================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    background-color: var(--bg-page);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden; /* Fallback guard */
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary-hover); }

/* ================= LAYOUT ================= */
.app-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
    position: relative;
}

/* Sidebar Overlay */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(2px);
    z-index: 40;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}
.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 50;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-header {
    height: 64px;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.sidebar-brand {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
}
.sidebar-brand span { color: var(--primary); }

.sidebar-close-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-sidebar);
    font-size: 20px;
    cursor: pointer;
    padding: var(--space-2);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4) var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.nav-section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255,255,255,0.4);
    font-weight: 600;
    margin: var(--space-4) 0 var(--space-2) var(--space-2);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: 10px 14px;
    color: var(--text-sidebar);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-link:hover {
    background-color: var(--bg-sidebar-hover);
    color: #fff;
}
.nav-link.active {
    background-color: var(--primary-dark);
    color: #fff;
}
.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 16px;
    opacity: 0.8;
}
.nav-link.active i { opacity: 1; color: #4ADE80; }

.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid rgba(255,255,255,0.05);
}

/* Main Content Wrapper */
.main-wrapper {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-width: 0; /* Prevents flex blowout */
    transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Top Header */
.top-header {
    height: 64px;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 30;
}

.hamburger-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 20px;
    cursor: pointer;
    margin-right: var(--space-4);
    padding: var(--space-1);
}

/* Page Header (Title + Actions) */
.page-header {
    padding: 24px 24px 20px 24px;
}
.page-header-content {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    flex-wrap: wrap;
}
.page-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -0.5px;
    line-height: 1.2;
    margin: 0;
}
.page-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}
.page-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-left: auto;
}

/* Content Body */
.content-body {
    padding: 0 var(--space-6) var(--space-8);
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
}

/* ================= COMPONENTS ================= */

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-6);
    overflow: hidden;
}
.card-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #FAFAFA;
}
.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
}
.card-body {
    padding: var(--space-6);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    height: 44px; /* Touch friendly */
    padding: 0 var(--space-5);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    white-space: nowrap;
}
.btn-primary { background-color: var(--primary); color: #ffffff !important; }
.btn-primary:hover { background-color: var(--primary-hover); color: #ffffff !important; box-shadow: var(--shadow-md); }

.btn-primary:focus { outline: none; box-shadow: var(--shadow-focus); }

.btn-secondary { background-color: var(--bg-card); color: var(--text-main) !important; border-color: var(--border-color); }
.btn-secondary:hover { background-color: #F8FAFC; color: var(--text-main) !important; border-color: #CBD5E1; }


.btn-danger { background-color: var(--danger); color: #ffffff !important; }
.btn-danger:hover { background-color: #B91C1C; color: #ffffff !important; }


.btn-soft { background-color: #F1F5F9; color: var(--text-secondary) !important; border: 1px solid transparent; height: 36px; padding: 0 var(--space-3); font-size: 13px; }
.btn-soft:hover { background-color: #E2E8F0; color: var(--text-main) !important; }


/* Forms */
.form-group {
    margin-bottom: var(--space-5);
}
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}
.form-control { width: 100%; min-height: 46px; padding: 0 14px; border: 1px solid var(--border-color); border-radius: 10px; background: #fff; color: var(--text-main); transition: all var(--transition-fast); }
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(22,163,74,.12); outline: none; }
.form-control::placeholder { color: var(--text-muted); }
.form-control:disabled { background-color: #F8FAFC; cursor: not-allowed; }

/* Grid Layouts for Forms */
.form-grid, .form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
}
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    text-align: left;
}
.table th, .table td { padding: 16px; vertical-align: middle; border-bottom: 1px solid var(--border-light); font-size: 14px; font-weight: 500; color: var(--text-main); }
.table td.old {
    padding: var(--space-4) var(--space-5);
    white-space: nowrap;
}
.table th { background: #F8FAFC; color: #475569; font-size: 12px; font-weight: 600; letter-spacing: .03em; text-transform: uppercase; padding: 14px 16px; white-space: nowrap; border-bottom: 1px solid var(--border-color); }
.table th.old {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    background-color: #FAFAFA;
}
.table td { padding: 16px; vertical-align: middle; border-bottom: 1px solid var(--border-light); font-size: 14px; font-weight: 500; color: var(--text-main); }
.table td.old {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-main);
    border-bottom: 1px solid var(--border-light);
}
.table tbody tr { transition: background-color var(--transition-fast); }
.table tbody tr:hover { background-color: #F8FAFC; }
.table tbody tr:last-child td { border-bottom: none; }

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    line-height: 1;
}
.badge-success { background-color: var(--success-bg); color: var(--success); }
.badge-warning { background-color: var(--warning-bg); color: var(--warning); }
.badge-danger { background-color: var(--danger-bg); color: var(--danger); }
.badge-info { background-color: var(--info-bg); color: var(--info); }

/* Alerts */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: 14px;
    font-weight: 500;
    border: 1px solid transparent;
}
.alert i { margin-top: 2px; }
.alert-success { background-color: var(--success-bg); color: var(--success); border-color: rgba(22,163,74,0.2); }
.alert-danger { background-color: var(--danger-bg); color: var(--danger); border-color: rgba(220,38,38,0.2); }

/* Utility */
.mb-0 { margin-bottom: 0 !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.text-muted { color: var(--text-muted) !important; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }

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

/* Tablet (1024px and below) */
@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.show { transform: translateX(0); }
    .sidebar-close-btn { display: block; }
    .main-wrapper { margin-left: 0; }
    .hamburger-btn { display: block; }
    .content-body { padding: 0 var(--space-4) var(--space-6); }
    .top-header { padding: 0 var(--space-4); }
    .page-header { padding: var(--space-5) var(--space-4) var(--space-4); }
}

/* Tablet (768px and below) */
@media (max-width: 768px) {
    .user-info-desktop { display: none; }
    .form-grid, .form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
} grid-template-columns: 1fr; gap: var(--space-4); }
    .page-header { flex-direction: column; align-items: flex-start; gap: var(--space-4); }
    .page-header .btn { width: 100%; }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
    .card-header { flex-direction: column; align-items: flex-start; gap: var(--space-3); }
    .content-body { padding: 0 var(--space-3) var(--space-4); }
    .top-header { padding: 0 var(--space-3); }
    .page-header { padding: var(--space-4) var(--space-3); }
    .table th, .table td { padding: 16px; vertical-align: middle; border-bottom: 1px solid var(--border-light); font-size: 14px; font-weight: 500; color: var(--text-main); }
.table td.old { padding: var(--space-3); }
}

/* Tiny Mobile (320px) */
@media (max-width: 360px) {
    .page-title { font-size: 20px; }
    .btn { padding: 0 var(--space-4); font-size: 13px; }
}







/* Premium File Input */
input[type="file"] {
    display: block;
    background: #F8FAFC;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    width: 100%;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}
input[type="file"]:hover {
    border-color: var(--primary);
    background: #F0FDF4;
}
input[type="file"]::file-selector-button {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 20px;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    margin-right: 20px;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}
input[type="file"]::file-selector-button:hover {
    background: #F1F5F9;
}



/* Table Actions & Responsive */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.table-responsive table {
    width: 100%;
    min-width: 720px;
}
.table-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: nowrap;
}
.table-actions .btn {
    height: 32px;
    padding: 0 12px;
    font-size: 12px;
}