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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px 0;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.logo-section h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    opacity: 0.95;
    letter-spacing: 0.5px;
}

.card {
    background: var(--bg-white);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin-bottom: 30px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-header {
    padding: 40px 40px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.card-header h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.card-header p {
    font-size: 0.95rem;
    opacity: 0.95;
    line-height: 1.5;
}

.visa-form {
    padding: 40px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.error-message {
    display: block;
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-top: 8px;
    font-weight: 500;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    text-decoration: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-block {
    width: 100%;
    display: flex;
}

.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.result {
    padding: 0 40px 40px;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.result-card {
    border: 2px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.profile-section {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 30px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 2px solid var(--border-color);
}

.profile-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.profile-icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

.profile-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--text-primary);
    text-transform: uppercase;
}

.tc-number {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--border-color);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: white;
}

.info-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.info-value {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.payment-section {
    padding: 30px;
    background: white;
}

.alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.alert svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid #10b981;
}

.alert-success svg {
    color: #10b981;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid #f59e0b;
}

.alert-warning svg {
    color: #f59e0b;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid #ef4444;
}

.alert-error svg {
    color: #ef4444;
}

.footer {
    text-align: center;
    color: white;
    padding: 20px;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Responsive tasarım */
@media (max-width: 640px) {
    body {
        padding: 10px;
    }

    .logo-section h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .card-header {
        padding: 30px 25px 20px;
    }

    .card-header h2 {
        font-size: 1.4rem;
    }

    .visa-form {
        padding: 25px;
    }

    .result {
        padding: 0 25px 25px;
    }

    .profile-section {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

    .profile-info h3 {
        font-size: 1.25rem;
    }

    .info-item {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
        padding: 15px 20px;
    }

    .payment-section {
        padding: 20px;
    }
}

/* Animasyon iyileştirmeleri */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}