:root {
    --primary-color: #2563EB;
    --primary-dark: #1d4ed8;
    --secondary-color: #10B981;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 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);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-y: auto; /* Ensure body scrolls */
}

.main-container {
    flex: 1;
    display: block; /* Changed from flex to block for simpler stacking */
    padding: 2rem 1rem 1rem 1rem; /* Added bottom padding */
    width: 100%;
}

.checkout-container {
    background-color: var(--card-bg);
    width: 100%;
    max-width: 800px;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    overflow: visible;
    display: flex;
    flex-direction: column;
    margin: 0 auto 3rem auto; /* Center horizontally and add bottom margin */
}

.page-footer {
    text-align: center;
    color: var(--text-light);
    font-size: 0.875rem;
    padding-bottom: 2rem;
    width: 100%;
}

.page-footer p {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Header */
.checkout-header {
    background-color: white;
    color: var(--text-color);
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    border-top-left-radius: 1rem;
    border-top-right-radius: 1rem;
}

.header-logo {
    height: 50px;
    margin-bottom: 1rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.checkout-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.checkout-header p {
    opacity: 0.8;
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Steps Progress */
.steps-container {
    padding: 1.5rem 2rem;
    background-color: #f8fafc;
    border-bottom: 1px solid var(--border-color);
}

.steps {
    display: flex;
    justify-content: space-between;
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--border-color);
    transform: translateY(-50%);
    z-index: 1;
}

.step-item {
    position: relative;
    z-index: 2;
    background-color: #f8fafc;
    padding: 0 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.step-circle {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background-color: white;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-light);
    transition: all 0.3s ease;
}

.step-item.active .step-circle {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
}

.step-item.completed .step-circle {
    border-color: var(--secondary-color);
    background-color: var(--secondary-color);
    color: white;
}

.step-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-light);
}

.step-item.active .step-label {
    color: var(--primary-color);
}

/* Content */
.checkout-content {
    padding: 2rem;
    min-height: 400px;
    flex: 1; /* Allow content to grow */
}

.step-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.step-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h2.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
}

/* Form Groups */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Plans Grid */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.plan-card {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    position: relative;
}

.plan-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.plan-card.selected {
    border-color: var(--primary-color);
    background-color: #eff6ff;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.plan-name {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.plan-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.plan-data {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.plan-features {
    list-style: none;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.plan-features li {
    margin-bottom: 0.25rem;
}

/* Credit Card */
.credit-card-preview {
    background: linear-gradient(135deg, #1e293b, #0f172a);
    color: white;
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    max-width: 350px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.card-number {
    font-family: monospace;
    font-size: 1.25rem;
    letter-spacing: 2px;
    margin: 1.5rem 0;
}

.card-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
}

.card-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    opacity: 0.7;
    margin-bottom: 0.25rem;
}

/* Footer Actions */
.checkout-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom-left-radius: 1rem;
    border-bottom-right-radius: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: all 0.2s;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.btn-outline:hover {
    background-color: white;
    border-color: var(--text-light);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Success Message */
.success-container {
    text-align: center;
    padding: 2rem;
}

.success-icon {
    font-size: 4rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}