/* =====================================================
   AV Digipro — Home Theatre E-Commerce
   style.css — Full Premium Dark-Gold Design System
   ===================================================== */

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

/* -----------------------------------------------
   CSS Custom Properties (Design Tokens)
----------------------------------------------- */
:root {
    --primary-accent:       #d4af37;
    --primary-accent-hover: #b5952f;
    --primary-accent-glow:  rgba(212, 175, 55, 0.2);
    --bg-color:             #050505;
    --bg-secondary:         #111111;
    --bg-tertiary:          #1f1f1f;
    --text-primary:         #ededed;
    --text-secondary:       #a0a0a0;
    --border-color:         #333333;
    --danger:               #cf6679;
    --danger-bg:            rgba(207, 102, 121, 0.15);
    --success:              #4caf50;
    --success-bg:           rgba(76, 175, 80, 0.15);
    --font-heading:         'Inter', sans-serif;
    --font-body:            'Roboto', sans-serif;
    --transition-fast:      0.2s ease;
    --transition-subtle:    0.4s ease;
    --radius-sm:            6px;
    --radius-md:            10px;
    --radius-lg:            16px;
    --shadow-gold:          0 0 30px rgba(212,175,55,0.1);
}

/* -----------------------------------------------
   Reset & Base
----------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.25;
}

a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary-accent); }

button { cursor: pointer; border: none; font-family: var(--font-heading); transition: all var(--transition-fast); }
img { display: block; max-width: 100%; }
input, select, textarea { font-family: var(--font-body); }

/* -----------------------------------------------
   Layout
----------------------------------------------- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

main.main-content {
    min-height: calc(100vh - 80px);
    padding: 32px 0 60px;
}

/* -----------------------------------------------
   Navbar
----------------------------------------------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 70px;
    background: rgba(5, 5, 5, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    transition: opacity var(--transition-fast);
}
.logo:hover { opacity: 0.85; color: var(--text-primary); }
.logo-span { color: var(--primary-accent); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
    transition: color var(--transition-fast);
    position: relative;
    padding-bottom: 4px;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 2px;
    background: var(--primary-accent);
    transition: width var(--transition-fast);
    border-radius: 2px;
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.cart-btn {
    position: relative;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}
.cart-btn:hover { color: var(--primary-accent); background: var(--primary-accent-glow); }

.cart-badge {
    position: absolute;
    top: -4px; right: -4px;
    background: var(--primary-accent);
    color: #000;
    font-size: 0.65rem;
    font-weight: 700;
    font-family: var(--font-heading);
    width: 18px; height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.user-btn {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-block;
}
.user-btn:hover {
    border-color: var(--primary-accent);
    color: var(--primary-accent);
    background: var(--primary-accent-glow);
}

/* -----------------------------------------------
   Hero Section
----------------------------------------------- */
.hero {
    text-align: center;
    padding: 80px 20px 60px;
    position: relative;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 50%; transform: translateX(-50%);
    width: 600px; height: 300px;
    background: radial-gradient(ellipse at center, rgba(212,175,55,0.08) 0%, transparent 70%);
    pointer-events: none;
}
.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -1.5px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ededed 40%, var(--primary-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.7;
}

/* -----------------------------------------------
   Section Heading
----------------------------------------------- */
.section-heading {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 48px 0 32px;
}
.section-heading h2 {
    font-size: 1.75rem;
    font-weight: 700;
}
.section-heading::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, var(--border-color), transparent);
}

/* -----------------------------------------------
   Product Grid & Cards
----------------------------------------------- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.product-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-subtle), border-color var(--transition-subtle), box-shadow var(--transition-subtle);
}
.product-card:hover {
    transform: translateY(-6px);
    border-color: rgba(212,175,55,0.4);
    box-shadow: var(--shadow-gold);
}

.product-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform var(--transition-subtle);
}
.product-card:hover .product-image { transform: scale(1.04); }

.product-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 10px;
}
.product-category {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--primary-accent);
}
.product-title {
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.35;
}
.product-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex: 1;
    line-height: 1.6;
}
.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}
.product-price {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary-accent);
    font-family: var(--font-heading);
}

/* -----------------------------------------------
   Buttons
----------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary {
    background: var(--primary-accent);
    color: #000;
    padding: 10px 20px;
    font-size: 0.875rem;
}
.btn-primary:hover {
    background: var(--primary-accent-hover);
    color: #000;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(212,175,55,0.3);
}
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    font-size: 0.875rem;
}
.btn-secondary:hover { border-color: var(--primary-accent); color: var(--primary-accent); background: var(--primary-accent-glow); }

.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 7px 14px;
    font-size: 0.8rem;
}
.btn-danger:hover { background: var(--danger); color: #fff; }

.btn-lg { padding: 14px 28px; font-size: 1rem; width: 100%; }

/* -----------------------------------------------
   Alert / Flash Messages
----------------------------------------------- */
.alert {
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: fadeInDown 0.3s ease;
}
.alert-error   { background: var(--danger-bg);  border: 1px solid var(--danger);  color: var(--danger);  }
.alert-success { background: var(--success-bg); border: 1px solid var(--success); color: var(--success); }

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* -----------------------------------------------
   Auth Pages (Login / Register)
----------------------------------------------- */
.auth-container {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}
.auth-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-gold);
    animation: fadeInUp 0.4s ease;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}
.auth-title {
    font-size: 2rem;
    margin-bottom: 8px;
    text-align: center;
}
.auth-subtitle {
    color: var(--text-secondary);
    text-align: center;
    font-size: 0.9rem;
    margin-bottom: 36px;
}
.auth-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: 28px;
}
.auth-tab {
    flex: 1;
    text-align: center;
    padding: 9px;
    border-radius: 5px;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: block;
}
.auth-tab.active, .auth-tab:hover { background: var(--bg-secondary); color: var(--text-primary); }
.auth-tab.active { color: var(--primary-accent); box-shadow: 0 0 0 1px var(--border-color); }

.form-group { margin-bottom: 20px; }
.form-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.form-input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 12px 16px;
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}
.form-input:focus {
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px var(--primary-accent-glow);
}
.form-input::placeholder { color: var(--text-secondary); }

/* -----------------------------------------------
   Cart Page
----------------------------------------------- */
.cart-container { max-width: 820px; margin: 0 auto; }
.page-title { font-size: 2rem; margin-bottom: 32px; }

.cart-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 32px; }

.cart-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    gap: 20px;
    align-items: center;
    transition: border-color var(--transition-fast);
}
.cart-item:hover { border-color: rgba(212,175,55,0.3); }

.cart-item-image {
    width: 90px; height: 90px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
}
.cart-item-details { flex: 1; }
.cart-item-title { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.cart-item-price { color: var(--primary-accent); font-weight: 700; font-size: 1.05rem; }

.qty-control { display: flex; align-items: center; gap: 12px; margin-top: 14px; }
.qty-btn {
    width: 32px; height: 32px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 700;
}
.qty-btn:hover { background: var(--primary-accent); color: #000; border-color: var(--primary-accent); }
.qty-value { font-weight: 700; min-width: 28px; text-align: center; font-family: var(--font-heading); }

.cart-item-total { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); min-width: 80px; text-align: right; }

.cart-summary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
}
.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}
.summary-row.total {
    border-top: 1px solid var(--border-color);
    margin-top: 10px;
    padding-top: 20px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-accent);
}

.empty-state {
    text-align: center;
    padding: 80px 40px;
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
}
.empty-state h2 { font-size: 1.5rem; color: var(--text-secondary); margin-bottom: 24px; }

/* -----------------------------------------------
   Checkout / Verify
----------------------------------------------- */
.checkout-container { max-width: 640px; margin: 0 auto; }
.order-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.order-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
}
.order-line-name { font-weight: 600; }
.order-line-price { color: var(--primary-accent); font-weight: 700; }

/* -----------------------------------------------
   Profile / Orders
----------------------------------------------- */
.profile-container { max-width: 800px; margin: 0 auto; }
.order-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 20px;
    transition: border-color var(--transition-fast);
}
.order-card:hover { border-color: rgba(212,175,55,0.3); }
.order-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}
.order-id   { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 4px; }
.order-date { font-size: 0.875rem; font-weight: 500; }
.order-amount { font-size: 1.25rem; font-weight: 700; color: var(--primary-accent); text-align: right; }
.order-item-row {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-bottom: 14px;
}
.order-item-img { width: 60px; height: 60px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
.order-item-name { font-weight: 600; font-size: 0.95rem; }
.order-item-qty  { font-size: 0.85rem; color: var(--text-secondary); margin-top: 2px; }

/* Status Badge */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-top: 8px;
}
.status-PENDING    { background: var(--bg-tertiary);  color: var(--text-secondary); border: 1px solid var(--border-color); }
.status-PAID       { background: rgba(212,175,55,0.2); color: var(--primary-accent); border: 1px solid var(--primary-accent); }
.status-SHIPPED    { background: rgba(100,149,237,0.2); color: #6495ed; border: 1px solid #6495ed; }
.status-DELIVERED  { background: var(--success-bg); color: var(--success); border: 1px solid var(--success); }
.status-CANCELLED  { background: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger); }

/* -----------------------------------------------
   Admin Dashboard
----------------------------------------------- */
.admin-container { max-width: 1100px; margin: 0 auto; }
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 48px;
}
.kpi-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    position: relative;
    overflow: hidden;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.kpi-card:hover { border-color: rgba(212,175,55,0.5); box-shadow: var(--shadow-gold); }
.kpi-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-accent), transparent);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.kpi-label { font-size: 0.8rem; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 12px; }
.kpi-value { font-size: 2.25rem; font-weight: 800; font-family: var(--font-heading); color: var(--primary-accent); }
.kpi-sub   { font-size: 0.8rem; color: var(--text-secondary); margin-top: 6px; }

.admin-table-wrapper {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    overflow-x: auto;
}
.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.admin-table thead tr {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}
.admin-table th {
    padding: 14px 18px;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-align: left;
    white-space: nowrap;
}
.admin-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}
.admin-table tbody tr:last-child td { border-bottom: none; }
.admin-table tbody tr:hover { background: rgba(255,255,255,0.02); }

.order-id-cell { font-size: 0.78rem; color: var(--text-secondary); max-width: 120px; overflow: hidden; text-overflow: ellipsis; }
.customer-name { font-weight: 600; margin-bottom: 2px; }
.customer-email { font-size: 0.78rem; color: var(--text-secondary); }
.amount-cell { font-weight: 700; color: var(--primary-accent); }

.status-select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 7px 12px;
    font-size: 0.85rem;
    cursor: pointer;
    font-family: var(--font-heading);
    transition: border-color var(--transition-fast);
    outline: none;
    min-width: 130px;
}
.status-select:focus { border-color: var(--primary-accent); }

/* Add product table in admin */
.admin-products-table { margin-top: 40px; }

/* -----------------------------------------------
   Spinner / Loading
----------------------------------------------- */
.spinner {
    display: inline-block;
    width: 18px; height: 18px;
    border: 2px solid rgba(0,0,0,0.3);
    border-top-color: #000;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* -----------------------------------------------
   Footer
----------------------------------------------- */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 28px 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}
footer span { color: var(--primary-accent); }

/* -----------------------------------------------
   Utility
----------------------------------------------- */
.text-accent   { color: var(--primary-accent); }
.text-muted    { color: var(--text-secondary); }
.text-danger   { color: var(--danger); }
.text-success  { color: var(--success); }
.mt-1 { margin-top:  8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom:  8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* -----------------------------------------------
   Responsive
----------------------------------------------- */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .product-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
    .hero-title  { font-size: 2rem; }
    .cart-item   { flex-wrap: wrap; }
    .auth-card   { padding: 32px 24px; }
    .kpi-grid    { grid-template-columns: 1fr 1fr; }
    .admin-table th, .admin-table td { padding: 10px 12px; }
    .order-card-header { flex-direction: column; gap: 12px; }
}
@media (max-width: 480px) {
    .kpi-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: 1fr; }
}