/* =========================
   GLOBAL VARIABLES
   ========================= */
:root {
    --bg: #f5f6f8;
    --card: #ffffff;
    --muted: #6b7280;
    --accent: #ff1744;
    --accent-dark: #d10a35;
    --ink: #111827;
    --radius: 12px;
    --shadow-sm: 0 6px 18px rgba(13, 20, 30, 0.06);
    --shadow-md: 0 12px 30px rgba(13, 20, 30, 0.12);
    --max-width: 1280px;
    --transition: 0.25s ease;
}

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

body {
    font-family: "Inter", system-ui;
    background: var(--bg);
    color: var(--ink);
}

/* =========================
   NAVBAR
   ========================= */
.nav-top-strip {
    background: #0f172a;
    color: #fff;
    padding: 8px;
    text-align: center;
    font-size: 14px;
}

.navbar {
    background: var(--card);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-main {
    max-width: var(--max-width);
    margin: auto;
    display: flex;
    align-items: center;
    padding: 12px 20px;
    justify-content: space-between;
}

.logo img {
    height: 55px;
}

.nav-center a {
    margin: 0 10px;
    text-decoration: none;
    font-weight: 500;
    color: var(--ink);
}

.nav-center a:hover {
    color: var(--accent);
}

.nav-right i {
    font-size: 20px;
}

.badge {
    background: var(--accent);
    padding: 2px 6px;
    font-size: 12px;
    color: #fff;
    border-radius: 50%;
    vertical-align: top;
    margin-left: 4px;
}

/* =========================
   PAGE TITLE
   ========================= */
.cart-title {
    text-align: center;
    margin: 25px 0;
    font-size: 30px;
    font-weight: 600;
}

/* =========================
   MAIN CART LAYOUT
   ========================= */
.container {
    max-width: var(--max-width);
    margin: auto;
    padding: 0 20px 40px;
}

.cart-layout {
    display: flex;
    gap: 30px;
}

/* =========================
   LEFT: CART ITEMS
   ========================= */
.cart-items {
    flex: 2;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* Single item */
.cart-item {
    display: flex;
    gap: 20px;
    background: var(--card);
    padding: 18px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    align-items: flex-start;
}

/* product image */
.cart-item img {
    width: 140px;
    height: 160px;
    border-radius: 10px;
    object-fit: cover;
}

/* item info */
.cart-info {
    flex: 1;
}

.cart-info h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.cart-info p {
    color: var(--muted);
    font-size: 15px;
    margin-bottom: 5px;
}

.cart-price {
    font-size: 22px;
    color: var(--accent);
    font-weight: bold;
    margin: 10px 0;
}

/* QTY BOX */
.qty-box {
    display: flex;
    gap: 10px;
    align-items: center;
}

.qty-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: none;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
    font-size: 20px;
    transition: var(--transition);
}

.qty-btn:hover {
    background: var(--accent-dark);
}

.qty-value {
    font-size: 17px;
    font-weight: 600;
}

/* Remove button */
.remove-btn {
    padding: 8px 16px;
    margin-top: 12px;
    background: #111;
    border: none;
    color: #fff;
    border-radius: 6px;
    cursor: pointer;
    width: fit-content;
}

.remove-btn:hover {
    opacity: 0.85;
}

/* EMPTY CART */
.empty-cart {
    background: var(--card);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.empty-cart h3 {
    margin-bottom: 10px;
}

/* =========================
   RIGHT: ORDER SUMMARY
   ========================= */
.cart-summary {
    flex: 1;
    background: var(--card);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    height: fit-content;
    position: sticky;
    top: 90px;
}

.cart-summary h2 {
    margin-bottom: 15px;
    font-size: 20px;
}

.summary-line {
    display: flex;
    justify-content: space-between;
    margin: 8px 0;
    font-size: 16px;
}

.total strong {
    font-size: 20px;
}

/* Coupon */
.coupon-box {
    display: flex;
    gap: 10px;
    margin-top: 12px;
}

.coupon-box input {
    flex: 1;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

.coupon-box button {
    padding: 10px 14px;
    background: #111;
    color: #fff;
    border-radius: 8px;
    border: none;
}

/* BUY NOW */
.buy-now-btn {
    margin-top: 16px;
    width: 100%;
    padding: 12px;
    background: linear-gradient(to bottom, var(--accent), var(--accent-dark));
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.buy-now-btn:hover {
    transform: translateY(-2px);
}

/* Coupon info */
.coupon-info {
    text-align: center;
    margin-top: 12px;
    font-size: 14px;
    color: var(--muted);
}

/* =========================
   RESPONSIVE (TABLET)
   ========================= */
@media (max-width: 900px) {
    .cart-layout {
        flex-direction: column;
    }

    .cart-summary {
        position: relative;
        top: 0;
        width: 100%;
    }
}

/* =========================
   RESPONSIVE (MOBILE)
   ========================= */
@media (max-width: 600px) {
    .cart-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .cart-item img {
        width: 200px;
        height: 220px;
    }

    .qty-box {
        justify-content: center;
    }

    .remove-btn {
        width: 100%;
    }
}