@import url('https://fonts.maateen.me/kalpurush/font.css');
@import url('https://fonts.maateen.me/solaiman-lipi/font.css');
@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@300;400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
    --bg-dark: #080c14;
    --panel-bg: #0f172a;
    --card-bg: rgba(15, 23, 42, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(59, 130, 246, 0.4);
    
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --text-accent: #38bdf8;

    --primary: #3b82f6;
    --primary-gradient: linear-gradient(135deg, #3b82f6, #6366f1);
    --success: #10b981;
    --success-gradient: linear-gradient(135deg, #10b981, #059669);
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-gradient: linear-gradient(135deg, #ef4444, #dc2626);
    --info: #06b6d4;

    --glow-primary: 0 0 25px rgba(59, 130, 246, 0.25);
    --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.5);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Kalpurush', 'SolaimanLipi', 'Hind Siliguri', 'Nikosh', 'SutonnyMJ', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body, button, input, select, textarea, table, th, td, h1, h2, h3, h4, h5, h6 {
    font-family: 'Kalpurush', 'SolaimanLipi', 'Hind Siliguri', 'Nikosh', 'SutonnyMJ', Arial, sans-serif;
}

html, body {
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: #60a5fa;
}

/* Universal Multi-Display Fluid Grid Architecture */
.app-container {
    display: flex;
    width: 100vw;
    min-height: 100vh;
    position: relative;
}

/* Universal Sidebar (Fluid Responsive Widths) */
.sidebar {
    width: 260px;
    min-width: 240px;
    max-width: 300px;
    height: 100vh;
    position: sticky;
    top: 0;
    background: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    padding: clamp(20px, 2vw, 32px) clamp(16px, 1.5vw, 24px);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 35px;
    text-decoration: none;
}

.brand-icon {
    width: clamp(40px, 3vw, 48px);
    height: clamp(40px, 3vw, 48px);
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(20px, 1.5vw, 24px);
    color: white;
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.35);
}

.brand-title {
    font-size: clamp(18px, 1.5vw, 22px);
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: clamp(10px, 1vw, 14px) clamp(14px, 1.2vw, 20px);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: clamp(13px, 1vw, 15px);
    font-weight: 600;
    transition: var(--transition);
}

.nav-item a:hover, .nav-item.active a {
    background: rgba(59, 130, 246, 0.14);
    color: #ffffff;
    box-shadow: inset 4px 0 0 var(--primary);
}

/* Universal Main Workspace Wrapper */
.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    width: 100%;
}

.top-navbar {
    min-height: clamp(65px, 5vw, 80px);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px clamp(15px, 2.5vw, 40px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 90;
    gap: 15px;
    flex-wrap: wrap;
}

.mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 26px;
    cursor: pointer;
    padding: 5px;
}

.content-area {
    padding: clamp(15px, 2.5vw, 35px);
    flex: 1;
    width: 100%;
    margin: 0 auto;
}

/* Universal Adaptive Cards & Layout */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: clamp(16px, 2vw, 30px);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-card);
    margin-bottom: clamp(16px, 2vw, 28px);
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.14);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: clamp(14px, 1.5vw, 24px);
    padding-bottom: clamp(10px, 1vw, 16px);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 12px;
}

.card-title {
    font-size: clamp(16px, 1.2vw, 20px);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Universal Fluid Form Grid & Controls */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: clamp(11px, 0.8vw, 13px);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    background: rgba(8, 12, 20, 0.85);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: clamp(10px, 1vw, 14px) clamp(14px, 1.2vw, 20px);
    color: var(--text-primary);
    font-size: clamp(13px, 1vw, 15px);
    outline: none;
    transition: var(--transition);
    width: 100%;
    min-height: clamp(42px, 3.5vw, 50px);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
    background: rgba(8, 12, 20, 0.98);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 42px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(200px, 20vw, 280px), 1fr));
    gap: clamp(12px, 1.5vw, 24px);
}

/* Universal Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: clamp(8px, 1vw, 12px) clamp(16px, 1.5vw, 24px);
    border-radius: var(--radius-md);
    font-size: clamp(12px, 0.9vw, 14px);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    min-height: clamp(38px, 3vw, 46px);
    white-space: nowrap;
    text-decoration: none;
}

.btn-primary { background: var(--primary-gradient); color: #ffffff; box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(59, 130, 246, 0.55); color: #ffffff; }

.btn-success { background: var(--success-gradient); color: #ffffff; box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35); }
.btn-success:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(16, 185, 129, 0.45); color: #ffffff; }

.btn-danger { background: var(--danger-gradient); color: #ffffff; }
.btn-danger:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(239, 68, 68, 0.45); color: #ffffff; }

.btn-secondary { background: rgba(255, 255, 255, 0.06); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: rgba(255, 255, 255, 0.12); color: #ffffff; }

/* Universal Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 30px;
    font-size: clamp(10px, 0.8vw, 12px);
    font-weight: 700;
    letter-spacing: 0.3px;
}

.badge-success { background: rgba(16, 185, 129, 0.12); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-warning { background: rgba(245, 158, 11, 0.12); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-danger { background: rgba(239, 68, 68, 0.12); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-info { background: rgba(59, 130, 246, 0.12); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.3); }

/* Universal Responsive Table Styling */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: rgba(8, 12, 20, 0.5);
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 650px;
}

th, td {
    padding: clamp(10px, 1.2vw, 18px) clamp(12px, 1.5vw, 24px);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: clamp(12px, 0.9vw, 14px);
}

th {
    background: rgba(15, 23, 42, 0.98);
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    font-size: clamp(10px, 0.75vw, 12px);
    letter-spacing: 0.8px;
}

tr:last-child td { border-bottom: none; }
tr:hover { background: rgba(255, 255, 255, 0.025); }

/* Off-canvas Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 95;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

/* MULTI-BREAKPOINT RESPONSIVE ADAPTATIONS */

/* 1. Large Desktop / 4K Displays (1600px+) */
@media (min-width: 1600px) {
    .sidebar { width: 280px; }
    .form-grid { grid-template-columns: repeat(4, 1fr); }
}

/* 2. Standard Laptops & Desktops (1025px - 1599px) */
@media (min-width: 1025px) and (max-width: 1599px) {
    .sidebar { width: 250px; }
    .form-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
}

/* 3. Tablets / iPad Portrait & Landscape (768px - 1024px) */
@media (max-width: 1024px) {
    .app-container { flex-direction: column; }
    
    .sidebar {
        position: fixed;
        top: 0; left: -300px; bottom: 0;
        width: 270px;
        height: 100vh;
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.6);
        transition: var(--transition);
    }

    .sidebar.active { left: 0; }
    .sidebar-overlay.active { opacity: 1; visibility: visible; }

    .mobile-toggle { display: block; }
    .top-navbar { padding: 12px 20px; }
    .content-area { padding: 20px 15px; }
    .form-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 4. Small Mobile Phones (Up to 767px) */
@media (max-width: 767px) {
    .top-navbar {
        flex-direction: column;
        align-items: stretch;
        height: auto;
        padding: 12px 15px;
        gap: 12px;
    }

    .form-grid { grid-template-columns: 1fr; }
    .card-header { flex-direction: column; align-items: flex-start; gap: 10px; }
    
    /* Full width on main action buttons without breaking table / pagination buttons */
    form > .btn,
    .card > .btn,
    .auth-container .btn {
        width: 100%;
        justify-content: center;
    }

    table .btn,
    .modal-overlay .btn,
    #paginationArea .btn,
    #pageButtons .btn {
        width: auto !important;
    }
}