/* ============================================
   TechNest — E-Commerce Review Testing Platform
   Design: Editorial Dark with Amber Accents
   ============================================ */

:root {
    --bg:        #0e0e0f;
    --bg2:       #161618;
    --bg3:       #1f1f22;
    --border:    #2a2a2e;
    --amber:     #f5a623;
    --amber-dim: #c4841b;
    --amber-glow:rgba(245,166,35,0.12);
    --text:      #e8e6e1;
    --text-muted:#8a8884;
    --text-dim:  #5a5856;
    --success:   #4caf50;
    --danger:    #ef5350;
    --warning:   #ff9800;
    --info:      #42a5f5;
    --radius:    10px;
    --radius-lg: 18px;
    --shadow:    0 4px 24px rgba(0,0,0,0.4);
    --font-head: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --transition: 0.2s cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--amber); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.8; }

/* ── Navbar ── */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    height: 64px;
    background: rgba(14,14,15,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-logo {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    color: var(--amber);
    font-size: 1.4rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

.nav-links a:hover { color: var(--text); opacity: 1; }

.admin-badge {
    background: var(--amber-glow);
    border: 1px solid var(--amber-dim);
    color: var(--amber) !important;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem !important;
}

.cart-link {
    position: relative;
    color: var(--text) !important;
}

.cart-count {
    background: var(--amber);
    color: #000;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 0.7rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 4px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--amber);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.logout-btn {
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text-muted) !important;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.82rem;
}

/* ── Buttons ── */
.btn-primary {
    background: var(--amber);
    color: #000 !important;
    padding: 8px 20px;
    border-radius: var(--radius);
    font-weight: 600;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: transform var(--transition), box-shadow var(--transition);
    font-family: var(--font-body);
    font-size: 0.9rem;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(245,166,35,0.3);
    opacity: 1;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text) !important;
    padding: 8px 20px;
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: border-color var(--transition);
}

.btn-outline:hover { border-color: var(--amber); opacity: 1; }

.btn-sm { padding: 5px 14px !important; font-size: 0.82rem !important; }

.btn-danger {
    background: var(--danger);
    color: #fff !important;
    padding: 6px 14px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 0.82rem;
    font-family: var(--font-body);
}

/* ── Main Layout ── */
.main-content { flex: 1; padding: 40px 32px; max-width: 1300px; margin: 0 auto; width: 100%; }

/* ── Page Header ── */
.page-header {
    margin-bottom: 40px;
}

.page-header h1 {
    font-family: var(--font-head);
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 8px;
}

.page-header p { color: var(--text-muted); font-size: 1rem; }

/* ── Product Grid ── */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-4px);
    border-color: var(--amber-dim);
    box-shadow: var(--shadow);
}

.product-img {
    background: var(--bg3);
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border-bottom: 1px solid var(--border);
}

.product-info { padding: 20px; }

.product-category {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--amber);
    margin-bottom: 6px;
}

.product-name {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: var(--text);
    line-height: 1.3;
}

.product-desc {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.product-price {
    font-family: var(--font-head);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--amber);
}

.product-stars {
    color: var(--amber);
    font-size: 0.85rem;
    display: flex;
    gap: 2px;
}

/* ── Product Detail ── */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 48px;
    margin-bottom: 60px;
}

.product-detail-img {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
}

.product-detail-info h1 {
    font-family: var(--font-head);
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -0.03em;
}

.product-detail-price {
    font-family: var(--font-head);
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--amber);
    margin: 16px 0;
}

.stock-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.stock-badge.in-stock { background: rgba(76,175,80,0.15); color: var(--success); border: 1px solid rgba(76,175,80,0.3); }
.stock-badge.out-stock { background: rgba(239,83,80,0.15); color: var(--danger); border: 1px solid rgba(239,83,80,0.3); }

.product-detail-desc {
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.7;
}

.qty-control {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.qty-btn {
    width: 36px;
    height: 36px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition);
}

.qty-btn:hover { border-color: var(--amber); }
.qty-display { font-family: var(--font-head); font-weight: 700; font-size: 1.2rem; }

/* ── Reviews Section ── */
.reviews-section { margin-top: 48px; }

.section-title {
    font-family: var(--font-head);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.review-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    animation: fadeInUp 0.3s ease both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.review-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.review-user {
    display: flex;
    align-items: center;
    gap: 10px;
}

.review-avatar {
    width: 36px;
    height: 36px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--amber);
}

.review-name { font-weight: 600; font-size: 0.95rem; }
.review-date { font-size: 0.78rem; color: var(--text-dim); }
.review-stars { color: var(--amber); font-size: 0.9rem; }
.review-text { color: var(--text-muted); line-height: 1.6; font-size: 0.93rem; }

.verdict-badge {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 3px 10px;
    border-radius: 20px;
}

.verdict-genuine { background: rgba(76,175,80,0.15); color: var(--success); border: 1px solid rgba(76,175,80,0.3); }
.verdict-bot     { background: rgba(239,83,80,0.15);  color: var(--danger);  border: 1px solid rgba(239,83,80,0.3); }
.verdict-fake    { background: rgba(255,152,0,0.15);  color: var(--warning); border: 1px solid rgba(255,152,0,0.3); }
.verdict-pending { background: rgba(66,165,245,0.15); color: var(--info);    border: 1px solid rgba(66,165,245,0.3); }

/* ── Write Review Form ── */
.review-form-box {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 32px;
}

.review-form-box h3 {
    font-family: var(--font-head);
    font-weight: 700;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.star-picker {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-direction: row-reverse;
    justify-content: flex-end;
}

.star-picker input { display: none; }
.star-picker label {
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text-dim);
    transition: color var(--transition);
    line-height: 1;
}

.star-picker input:checked ~ label,
.star-picker label:hover,
.star-picker label:hover ~ label {
    color: var(--amber);
}

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

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    padding: 12px 16px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--amber);
    box-shadow: 0 0 0 3px var(--amber-glow);
}

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

.form-select option { background: var(--bg3); }

/* ── Auth Pages ── */
.auth-wrap {
    min-height: calc(100vh - 64px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.auth-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 440px;
}

.auth-title {
    font-family: var(--font-head);
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.auth-sub { color: var(--text-muted); margin-bottom: 32px; font-size: 0.9rem; }

.auth-footer {
    text-align: center;
    margin-top: 24px;
    color: var(--text-muted);
    font-size: 0.88rem;
}

/* ── Alert / Flash ── */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background: rgba(76,175,80,0.12); border: 1px solid rgba(76,175,80,0.3); color: var(--success); }
.alert-error   { background: rgba(239,83,80,0.12); border: 1px solid rgba(239,83,80,0.3); color: var(--danger); }
.alert-info    { background: rgba(66,165,245,0.12); border: 1px solid rgba(66,165,245,0.3); color: var(--info); }

/* ── Admin Panel ── */
.admin-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 32px;
    align-items: start;
}

.admin-sidebar {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 0;
    position: sticky;
    top: 84px;
}

.admin-sidebar h3 {
    font-family: var(--font-head);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-dim);
    padding: 0 20px 12px;
}

.admin-nav-item {
    display: block;
    padding: 10px 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: all var(--transition);
    border-left: 3px solid transparent;
}

.admin-nav-item:hover,
.admin-nav-item.active {
    color: var(--amber);
    background: var(--amber-glow);
    border-left-color: var(--amber);
    opacity: 1;
}

.admin-main { flex: 1; }

/* ── Table ── */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 14px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    vertical-align: middle;
}

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

.data-table tr:hover td { background: var(--bg3); }

/* ── Card ── */
.card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h2 {
    font-family: var(--font-head);
    font-size: 1.1rem;
    font-weight: 700;
}

.card-body { padding: 24px; }

/* ── Stats ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.stat-num {
    font-family: var(--font-head);
    font-size: 2rem;
    font-weight: 800;
    color: var(--amber);
}

.stat-label { font-size: 0.78rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.08em; margin-top: 4px; }

/* ── Filter API Response ── */
.api-response-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    font-family: 'Courier New', monospace;
    font-size: 0.82rem;
    color: #7dd3a8;
    max-height: 200px;
    overflow: auto;
    margin-top: 16px;
    white-space: pre-wrap;
    word-break: break-all;
}

.api-response-box .label { color: var(--amber); font-weight: bold; }

/* ── Spinner ── */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(245,166,35,0.3);
    border-top-color: var(--amber);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    vertical-align: middle;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Toast ── */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 20px;
    font-size: 0.9rem;
    color: var(--text);
    box-shadow: var(--shadow);
    animation: slideIn 0.3s ease, fadeOut 0.4s ease 3.6s forwards;
    max-width: 320px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error   { border-left: 3px solid var(--danger); }

@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } }
@keyframes fadeOut { to { opacity: 0; transform: translateY(10px); } }

/* ── Cart ── */
.cart-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.cart-item-img {
    width: 64px;
    height: 64px;
    background: var(--bg3);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
}

.cart-item-info { flex: 1; }
.cart-item-name { font-weight: 600; margin-bottom: 4px; }
.cart-item-price { color: var(--amber); font-weight: 700; }
.cart-item-qty { color: var(--text-muted); font-size: 0.85rem; }

/* ── Footer ── */
.site-footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
    padding: 24px 32px;
    text-align: center;
}

.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.footer-brand { font-family: var(--font-head); font-weight: 700; color: var(--text); }
.footer-note  { color: var(--text-dim); font-size: 0.82rem; }
.footer-copy  { color: var(--text-dim); font-size: 0.78rem; }

/* ── Responsive ── */
@media (max-width: 900px) {
    .product-detail { grid-template-columns: 1fr; }
    .admin-layout   { grid-template-columns: 1fr; }
    .admin-sidebar  { position: static; }
    .navbar { padding: 0 16px; }
    .main-content { padding: 24px 16px; }
}

@media (max-width: 640px) {
    .nav-links > a:not(.btn-primary):not(.btn-outline):not(.cart-link) { display: none; }
    .product-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}