/* =============================================================
   Novel Infotech – Custom CSS
   TailwindCSS base + global overrides
============================================================= */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── CSS Variables ────────────────────────────────────────── */
:root {
    --primary:       #1E3A8A;
    --primary-dark:  #162D6E;
    --secondary:     #DC2626;
    --accent:        #D97706;
    --dark:          #0F172A;
    --dark-mid:      #1E293B;
    --light:         #F8FAFC;
    --text-main:     #1E293B;
    --text-muted:    #64748B;
    --border:        #E2E8F0;
    --transition:    0.25s ease;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after {
    border-radius: 0 !important;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background: var(--light);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: var(--primary); }
::-webkit-scrollbar-thumb:hover { background: var(--secondary); }

/* ── Buttons ──────────────────────────────────────────────── */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    padding: 12px 28px;
    border: 2px solid var(--primary);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(30,58,138,.35);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--primary);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    padding: 12px 28px;
    border: 2px solid var(--primary);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    font-size: 0.9rem;
}
.btn-secondary:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--secondary);
    border-color: var(--secondary);
}
.btn-danger:hover { background: #b91c1c; border-color: #b91c1c; }

.btn-accent {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--dark);
}
.btn-accent:hover { background: #b45309; border-color: #b45309; color: #fff; }

.btn-sm { padding: 7px 18px; font-size: 0.8rem; }

/* ── Section Headings ─────────────────────────────────────── */
.section-title {
    font-family: 'Poppins', sans-serif;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
}
.section-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 600px;
    line-height: 1.7;
}
.section-label {
    display: inline-block;
    background: var(--secondary);
    color: #fff;
    font-family: 'Poppins', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 4px 14px;
    margin-bottom: 12px;
}

/* ── Top Bar ──────────────────────────────────────────────── */
.top-bar {
    background: var(--dark);
    color: rgba(255,255,255,.85);
    font-size: 0.8rem;
    padding: 6px 0;
    border-bottom: 2px solid var(--secondary);
}

/* ── Navbar ───────────────────────────────────────────────── */
.navbar {
    background: #000;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,.15);
}
.navbar .nav-link {
    color: rgba(255,255,255,.85);
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    font-size: 0.88rem;
    padding: 6px 14px;
    transition: color var(--transition), background var(--transition);
    text-decoration: none;
    display: block;
    letter-spacing: 0.3px;
}
.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: #fff;
    background: rgba(255,255,255,.1);
}
.navbar .nav-link.active {
    border-bottom: 2px solid var(--secondary);
}

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    min-width: 200px;
    border-top: 3px solid var(--secondary);
    z-index: 200;
    box-shadow: 0 8px 30px rgba(0,0,0,.4);
}
.nav-dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a {
    display: block;
    padding: 9px 16px;
    color: rgba(255,255,255,.85);
    font-size: 0.83rem;
    font-family: 'Poppins', sans-serif;
    text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,.07);
    transition: background var(--transition), color var(--transition);
}
.dropdown-menu a:hover { background: var(--primary); color: #fff; }

/* ── Hero Section ─────────────────────────────────────────── */
.hero-section {
    background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 60%, #1d4ed8 100%);
    position: relative;
    overflow: hidden;
    min-height: 560px;
    display: flex;
    align-items: center;
}
.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* ── Course Card ──────────────────────────────────────────── */
.course-card {
    background: #fff;
    border-radius: 16px;
    border: 1px solid rgba(0,0,0,0.05);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}
.course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(30,58,138,0.12);
    border-color: rgba(30,58,138,0.1);
}
.course-card .card-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    object-position: top;
    display: block;
}
.course-card .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.course-card .card-actions { padding: 16px 24px; border-top: 1px solid rgba(0,0,0,0.05); background: #fff; }
.course-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 3px 10px;
    color: #fff;
    margin-bottom: 8px;
}

/* ── Stat Counter ─────────────────────────────────────────── */
.stat-card {
    background: #FFD700;
    color: #000;
    text-align: center;
    padding: 32px 20px;
    border: 2px solid #000;
    border-radius: 12px;
    transition: transform var(--transition);
}
.stat-card:hover { transform: scale(1.03); }
.stat-number {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 900;
    color: #000;
    display: block;
}

/* ── Category Horizontal Slider ───────────────────────────── */
.hide-scrollbar::-webkit-scrollbar { display: none; }
.hide-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

.cat-slider-card {
    min-width: 250px;
    height: 180px;
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    color: #fff;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    scroll-snap-align: start;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}
.cat-slider-card:hover { 
    transform: translateY(-5px); 
    box-shadow: 0 15px 35px -5px rgba(0,0,0,0.25); 
}
.cat-slider-card::after {
    content: '';
    position: absolute;
    right: -20px;
    bottom: -20px;
    width: 100px;
    height: 100px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}
.cat-slider-card .cat-icon { 
    font-size: 2.6rem; 
    margin-bottom: 14px; 
    color: #fff !important; 
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.cat-slider-card .cat-name {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    line-height: 1.3;
}
.cat-slider-card .cat-link {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.9);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ── Testimonial Card ─────────────────────────────────────── */
.testimonial-card {
    background: #fff;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    padding: 28px;
    transition: box-shadow var(--transition);
}
.testimonial-card:hover { box-shadow: 0 8px 30px rgba(0,0,0,.1); }

/* ── Blog Card ────────────────────────────────────────────── */
.blog-card {
    background: #fff;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}
.blog-card:hover { transform: translateY(-4px); box-shadow: 0 12px 35px rgba(0,0,0,.1); }

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
    background: var(--dark);
    color: rgba(255,255,255,.75);
    padding: 60px 0 0;
}
.footer-bottom {
    background: rgba(0,0,0,.35);
    padding: 18px 0;
    margin-top: 50px;
    border-top: 1px solid rgba(255,255,255,.08);
}
.footer-title {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--secondary);
}
.footer-link { color: rgba(255,255,255,.65); text-decoration: none; font-size: 0.88rem; display: block; padding: 3px 0; transition: color var(--transition); }
.footer-link:hover { color: var(--accent); padding-left: 5px; }

/* ── Admin Panel ──────────────────────────────────────────── */
.admin-sidebar {
    width: 255px;
    background: var(--dark);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    border-right: 3px solid var(--secondary);
    transition: transform var(--transition);
    display: flex;
    flex-direction: column;
}

.sidebar-nav-container {
    flex: 1;
    overflow-y: auto;
}

.sidebar-nav-container::-webkit-scrollbar { width: 3px; }
.sidebar-nav-container::-webkit-scrollbar-thumb { background: var(--primary); }
 
.admin-sidebar-footer {
    padding: 14px 18px;
    background: rgba(0,0,0,.3);
    border-top: 1px solid rgba(255,255,255,.08);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: auto;
}

.admin-content {
    margin-left: 255px;
    min-height: 100vh;
    background: #F1F5F9;
    transition: margin var(--transition);
}
.admin-topbar {
    background: #fff;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 2px 10px rgba(0,0,0,.06);
}

.sidebar-logo {
    padding: 20px 18px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    background: var(--primary);
}
.sidebar-logo .logo-text {
    font-family: 'Poppins', sans-serif;
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
}
.sidebar-logo .logo-sub { font-size: 0.65rem; color: var(--accent); letter-spacing: 1.5px; text-transform: uppercase; }

.sidebar-nav-group { padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
.sidebar-nav-label {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: rgba(255,255,255,.35);
    padding: 10px 18px 5px;
    display: block;
    font-family: 'Poppins', sans-serif;
}
.sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    color: rgba(255,255,255,.7);
    font-size: 0.87rem;
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
    border-left: 3px solid transparent;
}
.sidebar-link:hover, .sidebar-link.active {
    color: #fff;
    background: rgba(255,255,255,.08);
    border-left-color: var(--secondary);
}
.sidebar-link .icon { width: 18px; text-align: center; font-size: 0.95rem; }
.sidebar-link .badge {
    margin-left: auto;
    background: var(--secondary);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 1px 7px;
    font-family: 'Poppins', sans-serif;
}

/* ── Admin Stats Cards ────────────────────────────────────── */
.admin-stat {
    background: #fff;
    border: 1px solid var(--border);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 18px;
    transition: box-shadow var(--transition);
    border-top: 4px solid var(--primary);
}
.admin-stat:hover { box-shadow: 0 8px 24px rgba(0,0,0,.1); }
.admin-stat .stat-icon {
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
    flex-shrink: 0;
}
.admin-stat .stat-val { font-family: 'Poppins', sans-serif; font-size: 1.7rem; font-weight: 800; color: var(--dark); }
.admin-stat .stat-lbl { font-size: 0.8rem; color: var(--text-muted); font-family: 'Poppins', sans-serif; text-transform: uppercase; letter-spacing: 0.5px; }

/* ── Tables ───────────────────────────────────────────────── */
.ni-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.ni-table th {
    background: var(--dark);
    color: #fff;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 16px;
    text-align: left;
}
.ni-table td { padding: 11px 16px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.ni-table tr:hover td { background: #f0f4ff; }

/* ── Forms ────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 0.83rem; color: var(--dark); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.3px; }
.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    color: var(--text-main);
    background: #fff;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(30,58,138,.1); }
.form-control.error { border-color: var(--secondary); }
.form-hint { font-size: 0.76rem; color: var(--text-muted); margin-top: 4px; }

/* ── Badges ───────────────────────────────────────────────── */
.badge { display: inline-block; font-size: 0.68rem; font-weight: 700; font-family: 'Poppins', sans-serif; letter-spacing: 0.5px; padding: 3px 9px; text-transform: uppercase; }
.badge-success { background: #dcfce7; color: #16a34a; }
.badge-danger  { background: #fee2e2; color: #dc2626; }
.badge-warning { background: #fef9c3; color: #ca8a04; }
.badge-info    { background: #dbeafe; color: #1d4ed8; }
.badge-dark    { background: var(--dark); color: #fff; }

/* ── Card ─────────────────────────────────────────────────── */
.ni-card { background: #fff; border: 1px solid var(--border); overflow: hidden; }
.ni-card-header { background: var(--primary); color: #fff; padding: 14px 20px; font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 0.9rem; display: flex; justify-content: space-between; align-items: center; }
.ni-card-body { padding: 20px; }

/* ── Student Panel ────────────────────────────────────────── */
.student-sidebar {
    width: 240px;
    background: var(--primary);
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    overflow-y: auto;
    z-index: 100;
    border-right: 3px solid var(--secondary);
}
.student-content { margin-left: 240px; min-height: 100vh; background: #F1F5F9; }

/* ── PWA Install Banner ───────────────────────────────────── */
#pwa-install-banner {
    display: none;
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: #fff;
    padding: 16px 24px;
    box-shadow: 0 8px 40px rgba(0,0,0,.4);
    border-top: 3px solid var(--primary);
    z-index: 9999;
    min-width: 320px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
}

/* ── WhatsApp Float ───────────────────────────────────────── */
.whatsapp-float {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 9000;
    background: #25D366;
    color: #fff;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px rgba(37,211,102,.45);
    animation: pulse-wa 2s infinite;
    text-decoration: none;
    transition: transform var(--transition);
}
.whatsapp-float:hover { transform: scale(1.1); }
@media (max-width: 768px) {
    .whatsapp-float {
        bottom: calc(80px + env(safe-area-inset-bottom));
    }
}
@keyframes pulse-wa {
    0%, 100% { box-shadow: 0 4px 20px rgba(37,211,102,.45); }
    50%       { box-shadow: 0 4px 40px rgba(37,211,102,.8); }
}

/* ── Progress Bar ─────────────────────────────────────────── */
.progress-bar { background: #e5e7eb; height: 8px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--primary); transition: width 0.5s ease; }

/* ── Accordion ────────────────────────────────────────────── */
.accordion-item { border: 1px solid var(--border); margin-bottom: 2px; }
.accordion-header {
    background: #f8fafc;
    padding: 14px 18px;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition);
}
.accordion-header:hover { background: #e8efff; }
.accordion-header.active { background: var(--primary); color: #fff; }
.accordion-body { display: none; padding: 16px 18px; background: #fff; font-size: 0.88rem; }

/* ── Alert ────────────────────────────────────────────────── */
.alert { padding: 14px 18px; margin-bottom: 16px; border-left: 4px solid; font-family: 'Poppins', sans-serif; font-size: 0.88rem; }
.alert-success { background: #f0fdf4; border-color: #16a34a; color: #15803d; }
.alert-danger   { background: #fef2f2; border-color: #dc2626; color: #b91c1c; }
.alert-warning  { background: #fffbeb; border-color: #d97706; color: #92400e; }
.alert-info     { background: #eff6ff; border-color: #2563eb; color: #1d4ed8; }

/* ── Mobile responsive ────────────────────────────────────── */
@media (max-width: 768px) {
    .admin-sidebar, .student-sidebar { transform: translateX(-100%); }
    .admin-sidebar.open, .student-sidebar.open { transform: translateX(0); }
    .admin-content, .student-content { margin-left: 0; }
    .hero-section { min-height: 420px; }
}

/* ── Animations ───────────────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}
.animate-fade-up { animation: fadeInUp 0.5s ease forwards; }

/* ── Iso Badge ────────────────────────────────────────────── */
.iso-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent);
    color: var(--dark);
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 0.72rem;
    padding: 5px 12px;
    letter-spacing: 0.5px;
}

/* ── Enrollment Card ──────────────────────────────────────── */
.enrollment-card {
    background: #fff;
    border: 1px solid var(--border);
    border-top: 4px solid var(--primary);
    padding: 20px;
    transition: box-shadow var(--transition);
}
.enrollment-card:hover { box-shadow: 0 8px 25px rgba(0,0,0,.1); }

/* ── Overlay Sidebar ──────────────────────────────────────── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 99;
}
.sidebar-overlay.active { display: block; }

/* ── Search Box ───────────────────────────────────────────── */
.search-box {
    display: flex;
    border: 2px solid var(--primary);
}
.search-box input {
    flex: 1;
    padding: 10px 16px;
    border: none;
    outline: none;
    font-family: 'Inter', sans-serif;
}
.search-box button {
    background: var(--primary);
    color: #fff;
    padding: 0 20px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: background var(--transition);
}
.search-box button:hover { background: var(--primary-dark); }