/* ===================================
           CSS VARIABLES FOR THEMEING
           =================================== */
:root {
    --color-primary: #3b82f6; /* Blue */
    --color-secondary: #111827; /* Dark Gray/Black */
    --color-text-dark: #1f2937;
    --color-text-light: #6b7280;
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-background-page: #f9fafb;
    --color-background-card: #ffffff;
    --color-border-light: #e5e7eb;
    --color-border-medium: #d1d5db;
    --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --font-family-base: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --border-radius-base: 8px;
}

/* ===================================
           GLOBAL RESET & BASE STYLES
           =================================== */

body {
    font-family: var(--font-family-base);
    background-color: var(--color-background-page);
    color: var(--color-text-dark);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}
/* ===================================
           MAIN CONTENT
           =================================== */

.checkout-section {
    padding: 10rem 0;
    background-color: var(--color-background-card);
    min-height: 80vh;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 20px;
    text-align: center;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 40px;
    text-align: center;
}

.checkout-content {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

/* ===================================
           CHECKOUT FORM
           =================================== */
.checkout-form {
    flex: 2;
    min-width: 300px;
}

.form-section {
    background: var(--color-background-page);
    border: 1px solid var(--color-border-light);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-sm);
}

    .form-section h2 {
        font-size: 1.6rem;
        font-weight: 600;
        margin-bottom: 20px;
        color: var(--color-text-dark);
        display: flex;
        align-items: center;
        gap: 10px;
    }

        .form-section h2 i {
            color: var(--color-primary);
        }

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
}

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

    .form-group label {
        font-size: 0.95rem;
        font-weight: 600;
        color: #374151;
        margin-bottom: 8px;
        display: block;
    }

        .form-group label .required {
            color: var(--color-error);
        }

    .form-group input,
    .form-group select,
    .form-group textarea {
        width: 100%;
        padding: 12px 15px;
        border: 2px solid var(--color-border-medium);
        border-radius: var(--border-radius-base);
        font-size: 1rem;
        color: var(--color-text-dark);
        background-color: var(--color-background-card);
        transition: all 0.3s ease;
    }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
        }

/* Payment Methods */
.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.payment-method {
    position: relative;
}

    .payment-method input[type="radio"] {
        position: absolute;
        opacity: 0;
    }

    .payment-method label {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        padding: 15px;
        border: 2px solid var(--color-border-medium);
        border-radius: var(--border-radius-base);
        cursor: pointer;
        transition: all 0.3s ease;
        background: var(--color-background-card);
    }

    .payment-method input[type="radio"]:checked + label {
        border-color: var(--color-primary);
        background: #eff6ff; /* Light blue background */
    }

    .payment-method label i {
        font-size: 1.5rem;
    }

#card-details {
    margin-top: 20px;
}

/* ===================================
           ORDER SUMMARY
           =================================== */
.order-summary {
    flex: 1;
    min-width: 300px;
    background-color: var(--color-background-page);
    border: 1px solid var(--color-border-light);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow-sm);
    height: fit-content;
    position: sticky;
    top: 140px; /* Adjusted to be below fixed header */
}

    .order-summary h2 {
        font-size: 1.6rem;
        font-weight: 600;
        margin-bottom: 20px;
    }

.order-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--color-border-light);
}

.order-item-image {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-base);
    overflow: hidden;
    flex-shrink: 0;
}

    .order-item-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

.order-item-details {
    flex: 1;
}

.order-item-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: 5px;
}

.order-item-quantity {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.order-item-price {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    font-size: 1rem;
    margin: 15px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border-light);
}

.summary-total {
    font-weight: 700;
    font-size: 1.4rem;
    border-top: 2px solid var(--color-border-medium);
    padding-top: 15px;
    margin-top: 10px;
    color: var(--color-text-dark);
}

.place-order-btn {
    width: 100%;
    background: linear-gradient(135deg, #2a3446 0%, #1b2432 100%);
    color: var(--color-background-card);
    padding: 16px 25px;
    border-radius: 25px;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    margin-top: 20px;
    display: flex; /* For alignment of text/spinner */
    align-items: center;
    justify-content: center;
    gap: 10px;
}

    .place-order-btn:hover {
        transform: translateY(-3px);
        background: linear-gradient(135deg, #34425a 0%, #1f2938 100%);
        box-shadow: 0 10px 24px rgba(27, 36, 50, 0.45);
    }

    .place-order-btn:disabled {
        background: #6b7178;
        cursor: not-allowed;
        transform: none;
        box-shadow: none;
    }

.secure-checkout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 15px;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

    .secure-checkout i {
        color: var(--color-success);
    }

/* ===================================
           SUCCESS MESSAGE
           =================================== */
.success-message {
    display: none;
    background: #f0fdf4;
    border: 2px solid var(--color-success);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    margin: 40px auto;
    max-width: 600px;
}

    .success-message.show {
        display: block;
    }

    .success-message i {
        font-size: 4rem;
        color: var(--color-success);
        margin-bottom: 20px;
    }

    .success-message h2 {
        font-size: 2rem;
        color: #047857;
        margin-bottom: 15px;
    }

    .success-message p {
        font-size: 1.1rem;
        color: #374151;
        margin-bottom: 10px;
    }

.order-number {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 20px 0;
}



/* ===================================
           RESPONSIVE
           =================================== */
@media (max-width: 768px) {
    .main-header {
        padding-bottom: 0;
    }

    main {
        padding-top: 100px;
    }

    .checkout-progress {
        display: none;
    }

    .checkout-content {
        flex-direction: column;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .order-summary {
        position: relative;
        top: 0;
    }

    .payment-methods {
        grid-template-columns: 1fr;
    }
}