/* ============================================================
   ANTIGRAVITY STORE — Design System
   PHP 7.4 | CSS3 Vanilla | Dark Mode Premium
   ============================================================ */

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

/* --- Tokens --- */
:root {
    --bg:           #0d0d14;
    --bg-2:         #13131f;
    --bg-3:         #1a1a2a;
    --surface:      rgba(255,255,255,0.04);
    --surface-h:    rgba(255,255,255,0.08);
    --border:       rgba(255,255,255,0.08);
    --border-h:     rgba(255,255,255,0.16);

    --primary:      #7c3aed;
    --primary-h:    #6d28d9;
    --primary-l:    #a78bfa;
    --accent:       #06b6d4;

    --text:         #e2e8f0;
    --text-2:       #94a3b8;
    --text-3:       #475569;

    --success:      #22c55e;
    --warning:      #f59e0b;
    --danger:       #ef4444;

    --radius-sm:    0.5rem;
    --radius:       0.875rem;
    --radius-lg:    1.5rem;

    --shadow:       0 4px 24px rgba(0,0,0,0.4);
    --shadow-lg:    0 12px 48px rgba(0,0,0,0.5);

    --transition:   0.2s ease;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}
img { display: block; max-width: 100%; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* --- Layout --- */
.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13,13,20,0.85);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.9rem 0;
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}
.navbar-brand {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-l), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}
.navbar-links {
    display: flex;
    gap: 0.25rem;
}
.navbar-links a {
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-2);
    transition: color var(--transition), background var(--transition);
}
.navbar-links a:hover,
.navbar-links a.active {
    color: var(--text);
    background: var(--surface-h);
}
.navbar-actions { display: flex; gap: 0.75rem; align-items: center; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: opacity var(--transition), transform var(--transition), background var(--transition);
    white-space: nowrap;
}
.btn:hover  { opacity: 0.88; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #9333ea);
    color: #fff;
    box-shadow: 0 4px 16px rgba(124,58,237,0.35);
}
.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-h);
}
.btn-outline:hover { background: var(--surface-h); }
.btn-ghost {
    background: transparent;
    color: var(--text-2);
}
.btn-ghost:hover { color: var(--text); background: var(--surface); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.8rem; }
.btn-lg { padding: 0.8rem 1.75rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* Cart badge */
.cart-btn { position: relative; }
.cart-badge {
    position: absolute;
    top: -6px; right: -6px;
    background: var(--primary);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    width: 18px; height: 18px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    border: 2px solid var(--bg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    padding: 5rem 0 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -120px; left: 50%;
    transform: translateX(-50%);
    width: 700px; height: 700px;
    background: radial-gradient(circle, rgba(124,58,237,0.18) 0%, transparent 65%);
    pointer-events: none;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(124,58,237,0.12);
    border: 1px solid rgba(124,58,237,0.3);
    color: var(--primary-l);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    margin-bottom: 1.5rem;
}
.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 1.25rem;
}
.hero h1 span {
    background: linear-gradient(135deg, var(--primary-l), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p {
    font-size: 1.1rem;
    color: var(--text-2);
    max-width: 540px;
    margin: 0 auto 2rem;
}

/* ============================================================
   SECTION
   ============================================================ */
.section { padding: 3.5rem 0; }
.section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 2rem;
    gap: 1rem;
    flex-wrap: wrap;
}
.section-title {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}
.section-subtitle { color: var(--text-2); font-size: 0.875rem; margin-top: 0.2rem; }

/* ============================================================
   PRODUCT GRID & CARD
   ============================================================ */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.25rem;
}

.product-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
}
.product-card:hover {
    border-color: var(--border-h);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.product-card-img {
    aspect-ratio: 1 / 1;
    background: var(--bg-3);
    overflow: hidden;
    position: relative;
}
.product-card-img img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.35s ease;
}
.product-card:hover .product-card-img img { transform: scale(1.04); }
.product-card-img .no-image {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    font-size: 3rem; color: var(--text-3);
}
.product-card-badge {
    position: absolute; top: 0.75rem; left: 0.75rem;
    background: var(--primary);
    color: #fff;
    font-size: 0.68rem; font-weight: 700;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    text-transform: uppercase; letter-spacing: 0.5px;
}
.product-card-body {
    padding: 1rem 1.1rem 1.1rem;
    flex: 1;
    display: flex; flex-direction: column;
}
.product-card-cat {
    font-size: 0.72rem; font-weight: 600;
    color: var(--primary-l);
    text-transform: uppercase; letter-spacing: 0.5px;
    margin-bottom: 0.3rem;
}
.product-card-name {
    font-size: 0.95rem; font-weight: 600;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    color: var(--text);
    flex: 1;
}
.product-card-name a:hover { color: var(--primary-l); }
.product-card-desc {
    font-size: 0.8rem; color: var(--text-2);
    line-height: 1.5;
    margin-bottom: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-top: auto;
}
.product-price {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
}
.product-price-old {
    font-size: 0.8rem;
    color: var(--text-3);
    text-decoration: line-through;
}
.stock-low { font-size: 0.72rem; color: var(--warning); font-weight: 600; }

/* ============================================================
   PRODUTO INDIVIDUAL
   ============================================================ */
.produto-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
    padding: 3rem 0;
}
.produto-img {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    aspect-ratio: 1/1;
    overflow: hidden;
    display: flex; align-items: center; justify-content: center;
}
.produto-img img { width: 100%; height: 100%; object-fit: cover; }
.produto-img .no-image { font-size: 6rem; color: var(--text-3); }
.produto-info { display: flex; flex-direction: column; gap: 1.25rem; }
.produto-cat {
    font-size: 0.78rem; font-weight: 700;
    color: var(--primary-l); text-transform: uppercase; letter-spacing: 0.8px;
}
.produto-nome { font-size: 2rem; font-weight: 800; letter-spacing: -0.5px; line-height: 1.2; }
.produto-desc { font-size: 0.95rem; color: var(--text-2); line-height: 1.7; }
.produto-preco { font-size: 2.2rem; font-weight: 800; }
.produto-estoque { font-size: 0.85rem; color: var(--text-2); }
.produto-estoque strong { color: var(--success); }
.produto-qty {
    display: flex; align-items: center; gap: 0.75rem;
}
.qty-btn {
    width: 36px; height: 36px;
    background: var(--surface-h);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: background var(--transition);
}
.qty-btn:hover { background: var(--border-h); }
.qty-input {
    width: 56px; text-align: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 1rem; font-weight: 600;
    padding: 0.4rem;
}

/* ============================================================
   CARRINHO
   ============================================================ */
.cart-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 2rem;
    padding: 2.5rem 0;
    align-items: start;
}
.cart-items { display: flex; flex-direction: column; gap: 1rem; }
.cart-item {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: 1rem;
    align-items: center;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    transition: border-color var(--transition);
}
.cart-item:hover { border-color: var(--border-h); }
.cart-item-img {
    width: 80px; height: 80px;
    background: var(--bg-3);
    border-radius: var(--radius-sm);
    overflow: hidden;
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem; color: var(--text-3);
    flex-shrink: 0;
}
.cart-item-img img { width: 100%; height: 100%; object-fit: cover; }
.cart-item-name { font-weight: 600; font-size: 0.95rem; }
.cart-item-price { font-size: 0.88rem; color: var(--text-2); margin-top: 0.2rem; }
.cart-item-actions { display: flex; align-items: center; gap: 0.5rem; }
.cart-summary {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    position: sticky; top: 80px;
}
.cart-summary-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 1.25rem; }
.summary-row {
    display: flex; justify-content: space-between;
    font-size: 0.9rem; color: var(--text-2);
    margin-bottom: 0.75rem;
}
.summary-total {
    display: flex; justify-content: space-between;
    font-size: 1.15rem; font-weight: 700;
    border-top: 1px solid var(--border);
    padding-top: 1rem; margin-top: 0.5rem;
}
.empty-state {
    text-align: center;
    padding: 5rem 2rem;
    color: var(--text-2);
}
.empty-state .icon { font-size: 4rem; margin-bottom: 1rem; }
.empty-state h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text); }

/* ============================================================
   CHECKOUT
   ============================================================ */
.checkout-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 2rem;
    padding: 2.5rem 0;
    align-items: start;
}
.form-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
}
.form-card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 1.5rem; }
.form-group { margin-bottom: 1.15rem; }
.form-label {
    display: block;
    font-size: 0.78rem; font-weight: 600;
    color: var(--text-2); text-transform: uppercase; letter-spacing: 0.4px;
    margin-bottom: 0.4rem;
}
.form-input, .form-textarea, .form-select {
    width: 100%;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.95rem;
    font-family: inherit;
    padding: 0.65rem 0.9rem;
    outline: none;
    transition: border-color var(--transition);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
    border-color: var(--primary-l);
}
.form-textarea { resize: vertical; min-height: 90px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ============================================================
   ALERTS
   ============================================================ */
.alert {
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    font-size: 0.875rem;
    margin-bottom: 1.25rem;
    line-height: 1.5;
}
.alert-success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #86efac; }
.alert-error   { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; }
.alert-info    { background: rgba(6,182,212,0.1); border: 1px solid rgba(6,182,212,0.3); color: #67e8f9; }

/* ============================================================
   CONFIRMAÇÃO
   ============================================================ */
.confirm-box {
    max-width: 560px;
    margin: 4rem auto;
    text-align: center;
}
.confirm-icon { font-size: 4.5rem; margin-bottom: 1.5rem; }
.confirm-title { font-size: 2rem; font-weight: 800; margin-bottom: 0.75rem; }
.confirm-id {
    display: inline-block;
    background: rgba(124,58,237,0.15);
    border: 1px solid rgba(124,58,237,0.3);
    color: var(--primary-l);
    padding: 0.3rem 1rem;
    border-radius: 999px;
    font-size: 0.85rem; font-weight: 700;
    margin-bottom: 1.25rem;
}
.confirm-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    text-align: left;
}
.confirm-table th, .confirm-table td {
    padding: 0.7rem 1rem;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
}
.confirm-table th { color: var(--text-2); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    border-top: 1px solid var(--border);
    padding: 2.5rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-3);
    font-size: 0.875rem;
}
.footer a { color: var(--text-2); }
.footer a:hover { color: var(--primary-l); }

/* ============================================================
   PÁGINA TÍTULO
   ============================================================ */
.page-header {
    padding: 2.5rem 0 0;
    margin-bottom: 2rem;
}
.page-title { font-size: 1.75rem; font-weight: 800; letter-spacing: -0.5px; }
.page-subtitle { color: var(--text-2); font-size: 0.95rem; margin-top: 0.3rem; }
.breadcrumb { display: flex; gap: 0.4rem; align-items: center; font-size: 0.8rem; color: var(--text-3); margin-bottom: 0.75rem; }
.breadcrumb a:hover { color: var(--primary-l); }

/* ============================================================
   RESPONSIVIDADE
   ============================================================ */
@media (max-width: 900px) {
    .produto-layout,
    .cart-layout,
    .checkout-layout { grid-template-columns: 1fr; }
    .cart-summary { position: static; }
}
@media (max-width: 600px) {
    .hero h1 { font-size: 1.85rem; }
    .products-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
    .cart-item { grid-template-columns: 60px 1fr; }
    .cart-item-actions { grid-column: 1 / -1; justify-content: flex-end; }
    .navbar-links { display: none; }
    .form-row { grid-template-columns: 1fr; }
}