:root {
    --checkout-green: #2eb82e;
    --checkout-dark: #14231a;
    --checkout-border: #dfe7df;
    --checkout-soft: #f4faf4;
    --checkout-text: #1f2937;
    --checkout-muted: #6b7280;
    --checkout-danger: #d93025;
}

body {
    background: linear-gradient(180deg, #f4faf4 0%, #eef4ef 100%);
    color: var(--checkout-text);
}

.checkout-header {
    position: sticky;
    top: 0;
}

.checkout-header .logo a {
    display: inline-flex;
}

.checkout-header .logo img {
    height: 54px;
}

.checkout-page {
    padding: 40px 20px 60px;
}

.checkout-wrap {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.8fr);
    gap: 28px;
    align-items: start;
}

.checkout-form-card,
.checkout-summary-card {
    background: #fff;
    border-radius: 22px;
    box-shadow: 0 18px 45px rgba(16, 24, 40, 0.08);
    border: 1px solid rgba(46, 184, 46, 0.08);
}

.checkout-form-card {
    padding: 28px;
}

.checkout-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.back-link,
.secure-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
}

.back-link {
    color: #1f5130;
    text-decoration: none;
}

.secure-badge {
    background: #edf9ee;
    color: #1f5130;
    padding: 10px 14px;
    border-radius: 999px;
}

.checkout-heading h1 {
    font-size: 34px;
    line-height: 1.15;
    margin: 8px 0 12px;
}

.checkout-heading p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--checkout-muted);
    margin-bottom: 28px;
}

.eyebrow,
.summary-label {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: #edf9ee;
    color: #1f5130;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-section {
    border-top: 1px solid #eef2ef;
    padding-top: 24px;
    margin-top: 24px;
}

.form-section:first-of-type {
    border-top: 0;
    padding-top: 0;
    margin-top: 0;
}

.form-section h2 {
    margin: 0 0 18px;
    font-size: 22px;
}

.form-grid {
    display: grid;
    gap: 18px;
}

.two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field-group {
    display: flex;
    flex-direction: column;
}

.field-group label {
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
}

.field-group input,
.field-group select {
    width: 100%;
    min-height: 54px;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid var(--checkout-border);
    font-size: 16px;
    outline: none;
    background: #fff;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field-group input:focus,
.field-group select:focus {
    border-color: #67b246;
    box-shadow: 0 0 0 4px rgba(103, 178, 70, 0.12);
}

.field-group.has-error input,
.field-group.has-error select,
.agree-row.has-error {
    border-color: var(--checkout-danger);
}

.error-text {
    min-height: 18px;
    margin-top: 6px;
    font-size: 13px;
    color: var(--checkout-danger);
}

.full-width {
    grid-column: 1 / -1;
}

.agree-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-top: 24px;
    padding: 16px;
    border: 1px solid var(--checkout-border);
    border-radius: 16px;
    background: #fafdf9;
}

.agree-row input {
    margin-top: 4px;
    transform: scale(1.2);
}

.checkbox-error {
    margin-top: 8px;
}

.place-order-btn {
    width: 100%;
    margin-top: 16px;
    border: 0;
    border-radius: 16px;
    background: linear-gradient(180deg, #43cb43 0%, #239d23 100%);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    padding: 18px 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    box-shadow: 0 14px 28px rgba(46, 184, 46, 0.25);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.place-order-btn:hover {
    transform: translateY(-1px);
}

.place-order-btn.is-loading {
    opacity: 0.8;
    cursor: wait;
}

.checkout-summary-card {
    padding: 22px;
}

.summary-sticky {
    position: sticky;
    top: 110px;
}

.summary-product {
    margin-top: 18px;
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 16px;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid #eef2ef;
}

.summary-product img {
    width: 96px;
    height: 96px;
    border-radius: 18px;
    background: #f4f7f3;
    object-fit: contain;
    padding: 12px;
}

.summary-product h3 {
    margin: 0 0 8px;
    font-size: 21px;
}

.summary-product p {
    margin: 0;
    color: var(--checkout-muted);
    line-height: 1.6;
}

.summary-list {
    padding: 20px 0;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px dashed #e5ebe5;
}

.summary-row.total {
    border-bottom: 0;
    padding-top: 18px;
    font-size: 18px;
}

.summary-row.total strong {
    color: #1b7f1b;
    font-size: 24px;
}

.summary-points {
    list-style: none;
    padding: 0;
    margin: 8px 0 0;
}

.summary-points li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    color: #31403a;
}

.summary-points i {
    color: #2eb82e;
}

.checkout-footer {
    text-align: center;
    padding: 24px 16px 40px;
    color: #6b7280;
}

.checkout-footer a {
    color: #4b5563;
    text-decoration: none;
}

.checkout-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 991px) {
    .checkout-wrap {
        grid-template-columns: 1fr;
    }

    .summary-sticky {
        position: static;
    }
}

@media (max-width: 767px) {
    .checkout-page {
        padding: 24px 14px 40px;
    }

    .checkout-form-card,
    .checkout-summary-card {
        border-radius: 18px;
    }

    .checkout-form-card {
        padding: 20px;
    }

    .checkout-topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .checkout-heading h1 {
        font-size: 28px;
    }

    .two-col {
        grid-template-columns: 1fr;
    }

    .place-order-btn {
        font-size: 18px;
    }

    .checkout-header nav {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: flex-end;
    }
}