/* ============================================
   Grofast Digital Academy - Stylesheet
   Brand Colors: #fe3b67, #f7931e, #171721
   Font: Montserrat
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Bengali:wght@300;400;500;600;700&display=swap');

:root {
    --primary-pink: #fe3b67;
    --primary-orange: #f7931e;
    --gradient: linear-gradient(45deg, #fe3b67, #f7931e);
    --gradient-reverse: linear-gradient(45deg, #f7931e, #fe3b67);
    --dark-bg: #171721;
    --dark-card: #1e1e2d;
    --dark-surface: #2d2d3d;
    --accent-orange: #f9802e;
    --text-light: #ffffff;
    --text-muted: #8a8a9a;
    --text-dark: #171721;
    --success: #22c55e;
    --warning: #f7931e;
    --danger: #fe3b67;
    --info: #3b82f6;
    --border-radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.2);
}

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

body {
    font-family: 'Montserrat', 'Noto Sans Bengali', sans-serif;
    background: #f5f5f7;
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* ---- Admin Layout ---- */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 270px;
    background: var(--dark-bg);
    color: var(--text-light);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    text-align: center;
}

.sidebar-header img {
    height: 40px;
    margin-bottom: 8px;
}

.sidebar-header .subtitle {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.sidebar-nav {
    padding: 16px 0;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--text-light);
    background: rgba(255,255,255,0.05);
    border-left-color: var(--primary-orange);
}

.sidebar-nav a .icon {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.sidebar-nav .nav-section {
    padding: 16px 24px 8px;
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.main-content {
    margin-left: 270px;
    flex: 1;
    min-height: 100vh;
}

.topbar {
    background: #fff;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #e5e5ea;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
}

.topbar .admin-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-muted);
}

.topbar .admin-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 14px;
}

.content-area {
    padding: 32px;
}

/* ---- Cards ---- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: #fff;
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.stat-card.pink::before { background: var(--primary-pink); }
.stat-card.orange::before { background: var(--primary-orange); }
.stat-card.green::before { background: var(--success); }
.stat-card.blue::before { background: var(--info); }

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
}

.stat-card.pink .stat-icon { background: rgba(254,59,103,0.1); color: var(--primary-pink); }
.stat-card.orange .stat-icon { background: rgba(247,147,30,0.1); color: var(--primary-orange); }
.stat-card.green .stat-icon { background: rgba(34,197,94,0.1); color: var(--success); }
.stat-card.blue .stat-icon { background: rgba(59,130,246,0.1); color: var(--info); }

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-dark);
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ---- Tables ---- */
.table-card {
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 24px;
}

.table-header {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #e5e5ea;
}

.table-header h3 {
    font-size: 16px;
    font-weight: 700;
}

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

.data-table th {
    background: #f9f9fb;
    padding: 12px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: left;
    border-bottom: 1px solid #e5e5ea;
}

.data-table td {
    padding: 14px 16px;
    font-size: 14px;
    border-bottom: 1px solid #f0f0f5;
    vertical-align: middle;
}

.data-table tr:hover {
    background: #fafafe;
}

.data-table .student-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.data-table .student-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    font-size: 13px;
    flex-shrink: 0;
}

/* ---- Badges ---- */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: rgba(34,197,94,0.1); color: #16a34a; }
.badge-warning { background: rgba(247,147,30,0.1); color: #d97706; }
.badge-danger { background: rgba(254,59,103,0.1); color: #dc2626; }
.badge-info { background: rgba(59,130,246,0.1); color: #2563eb; }
.badge-dark { background: rgba(23,23,33,0.1); color: #171721; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(254,59,103,0.3);
}

.btn-outline {
    background: transparent;
    border: 2px solid #e5e5ea;
    color: var(--text-dark);
}

.btn-outline:hover {
    border-color: var(--primary-orange);
    color: var(--primary-orange);
}

.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* ---- Forms ---- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e5ea;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s;
    background: #fff;
    color: var(--text-dark);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-orange);
    box-shadow: 0 0 0 3px rgba(247,147,30,0.1);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ---- Alert Messages ---- */
.alert {
    padding: 14px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
}

.alert-success { background: rgba(34,197,94,0.1); color: #16a34a; border-left: 4px solid var(--success); }
.alert-danger { background: rgba(254,59,103,0.1); color: #dc2626; border-left: 4px solid var(--danger); }
.alert-warning { background: rgba(247,147,30,0.1); color: #d97706; border-left: 4px solid var(--warning); }

/* ---- Login Page ---- */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-bg);
    position: relative;
    overflow: hidden;
}

.login-wrapper::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(254,59,103,0.15), transparent 70%);
    top: -100px;
    right: -100px;
}

.login-wrapper::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(247,147,30,0.1), transparent 70%);
    bottom: -100px;
    left: -100px;
}

.login-card {
    background: var(--dark-card);
    border-radius: 20px;
    padding: 48px;
    width: 420px;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-lg);
}

.login-card .logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-card .logo img {
    height: 48px;
}

.login-card h2 {
    color: var(--text-light);
    font-size: 22px;
    text-align: center;
    margin-bottom: 8px;
}

.login-card .login-subtitle {
    color: var(--text-muted);
    text-align: center;
    font-size: 14px;
    margin-bottom: 32px;
}

.login-card .form-control {
    background: var(--dark-surface);
    border-color: rgba(255,255,255,0.08);
    color: var(--text-light);
}

.login-card .form-control:focus {
    border-color: var(--primary-orange);
}

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

.login-card .btn-primary {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    margin-top: 8px;
}

/* ---- Certificate Verify Page (Public) ---- */
.public-wrapper {
    min-height: 100vh;
    background: var(--dark-bg);
}

.public-nav {
    padding: 20px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.public-nav img {
    height: 36px;
}

.public-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

.verify-hero {
    text-align: center;
    padding: 80px 20px 40px;
}

.verify-hero h1 {
    color: var(--text-light);
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 12px;
}

.verify-hero h1 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.verify-hero p {
    color: var(--text-muted);
    font-size: 16px;
    max-width: 500px;
    margin: 0 auto;
}

.verify-search {
    max-width: 560px;
    margin: 40px auto;
    display: flex;
    gap: 12px;
    padding: 0 20px;
}

.verify-search input {
    flex: 1;
    padding: 16px 24px;
    border-radius: 12px;
    border: 2px solid rgba(255,255,255,0.1);
    background: var(--dark-card);
    color: var(--text-light);
    font-size: 16px;
    font-family: inherit;
}

.verify-search input:focus {
    outline: none;
    border-color: var(--primary-orange);
}

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

.verify-search button {
    padding: 16px 32px;
    border-radius: 12px;
    background: var(--gradient);
    border: none;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
}

/* Certificate Result Card */
.cert-result {
    max-width: 700px;
    margin: 20px auto 60px;
    padding: 0 20px;
}

.cert-card {
    background: var(--dark-card);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.06);
}

.cert-card-header {
    background: var(--gradient);
    padding: 24px 32px;
    text-align: center;
}

.cert-card-header h3 {
    color: #fff;
    font-size: 18px;
    font-weight: 700;
}

.cert-card-header .cert-status {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 16px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    color: #fff;
    font-size: 13px;
    font-weight: 600;
}

.cert-card-body {
    padding: 32px;
}

.cert-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.cert-detail-item {
    padding: 16px;
    background: var(--dark-surface);
    border-radius: 12px;
}

.cert-detail-item .label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.cert-detail-item .value {
    font-size: 16px;
    color: var(--text-light);
    font-weight: 600;
}

.cert-not-found {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.cert-not-found .icon {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--primary-pink);
}

/* ---- Invoice Print ---- */
.invoice-print {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    background: #fff;
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 3px solid var(--dark-bg);
}

.invoice-header img {
    height: 48px;
}

.invoice-header .invoice-info {
    text-align: right;
}

.invoice-header .invoice-info h2 {
    font-size: 28px;
    color: var(--primary-orange);
    font-weight: 800;
}

.invoice-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.invoice-body th {
    background: var(--dark-bg);
    color: #fff;
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
}

.invoice-body td {
    padding: 12px 16px;
    border-bottom: 1px solid #eee;
}

.invoice-total {
    text-align: right;
    font-size: 18px;
    font-weight: 700;
    margin-top: 20px;
}

/* ---- Certificate Template ---- */
.certificate-template {
    width: 900px;
    min-height: 636px;
    margin: 0 auto;
    background: #fff;
    position: relative;
    overflow: hidden;
    border: 8px solid var(--dark-bg);
}

.certificate-template::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 8px;
    background: var(--gradient);
}

.certificate-template::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 8px;
    background: var(--gradient);
}

.cert-inner {
    padding: 48px;
    text-align: center;
}

.cert-inner .cert-logo {
    margin-bottom: 24px;
}

.cert-inner .cert-logo img {
    height: 48px;
}

.cert-inner .cert-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-dark);
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-bottom: 8px;
}

.cert-inner .cert-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 2px;
    margin-bottom: 32px;
}

.cert-inner .cert-recipient {
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.cert-inner .cert-course {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 32px;
}

.cert-inner .cert-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid #eee;
}

.cert-inner .cert-footer .footer-item {
    text-align: center;
}

.cert-inner .cert-footer .footer-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-top: 2px solid var(--text-dark);
    padding-top: 8px;
}

.cert-inner .cert-footer .footer-value {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .form-row { grid-template-columns: 1fr; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .cert-detail-grid { grid-template-columns: 1fr; }
    .verify-search { flex-direction: column; }
    .content-area { padding: 16px; }
    .topbar { padding: 12px 16px; }
    .login-card { margin: 20px; width: auto; padding: 32px; }
}

@media print {
    .no-print { display: none !important; }
    body { background: #fff; }
    .sidebar, .topbar { display: none; }
    .main-content { margin-left: 0; }
}