:root {
    --primary: #064e3b; /* Deep Green */
    --primary-light: #ecfdf5;
    --secondary: #4b5563;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --background: #f0fdf4; /* Very light green wash */
    --surface: #ffffff;
    --text: #064e3b; /* Consistent dark green text */
    --text-muted: #6b7280;
    --accent: #f59e0b; /* Gold accent */
    --border: #d1fae5;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.logo span {
    color: var(--accent);
}

.checkout-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 2rem;
}

@media (max-width: 900px) {
    .checkout-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.step-number {
    background: var(--primary);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text);
}

input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s;
}

input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Payment Grid */
.payment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 1rem;
}

.payment-option {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.payment-option img {
    height: 24px;
    margin-bottom: 0.5rem;
    object-fit: contain;
}

.payment-option span {
    font-size: 0.75rem;
    font-weight: 600;
}

.payment-option:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.payment-option.active {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: 0 0 0 2px var(--primary);
}

/* Summary Styles */
.summary-item {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.summary-item .label {
    text-align: right;
    width: 120px;
}

.summary-item .value {
    width: 100px;
    text-align: right;
    color: var(--text);
}

.summary-total {
    display: flex;
    justify-content: flex-end;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--border);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary);
}

.summary-total .label {
    text-align: right;
    width: 120px;
}

.summary-total .value {
    width: 120px;
    text-align: right;
}

.btn-submit {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: var(--radius);
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 1rem;
    box-shadow: 0 4px 12px rgba(0, 108, 230, 0.3);
}

.btn-submit:hover {
    background: #0056b8;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 108, 230, 0.4);
}

.promo-badge {
    background: #fff1f2;
    color: #e11d48;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.countdown {
    text-align: center;
    background: #fffbeb;
    border: 1px solid #fef3c7;
    color: #92400e;
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.countdown span {
    color: #b45309;
    font-family: monospace;
    font-size: 1.125rem;
}

.trust-elements {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
    opacity: 0.6;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
}