body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #eef2f5;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 2rem 1rem;
}

:root {
    --primary-color: #5c2d91; /* Mor */
    --secondary-color: #00a9e0; /* Mavi */
    --line-color: #e0e0e0;
    --step-text-color: #888;
}

.form-container {
    background-color: #ffffff;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 550px;
}

.form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}
.form-header img { height: 25px; }
.form-title { text-align: center; font-weight: 700; color: #333; margin-bottom: 2rem; }

.progress-bar-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2.5rem;
}
.step {
    text-align: center;
    position: relative;
    width: 25%;
}
.step span {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #fff;
    border: 2px solid var(--line-color);
    color: var(--step-text-color);
    font-weight: bold;
    margin: 0 auto 0.5rem;
    transition: all 0.3s ease;
}
.step p {
    font-size: 0.8rem;
    color: var(--step-text-color);
    line-height: 1.2;
    transition: all 0.3s ease;
    font-weight: 500;
}
.progress-line {
    flex-grow: 1;
    height: 2px;
    background-color: var(--line-color);
    margin-top: 20px;
    transition: all 0.3s ease;
}
.step.active span {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: #fff;
}
.step.active p { color: #333; }
.step.active + .progress-line { background-color: var(--secondary-color); }

.form-step { display: none; }
.form-step.active { display: block; animation: fadeIn 0.5s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.form-label { font-weight: 600; font-size: 0.9rem; color: #555; }
.form-control, .form-select {
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 0.75rem 1rem;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(92, 45, 145, 0.15);
}

.button-group { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2rem; }
.btn-primary, .btn-secondary {
    border: none;
    border-radius: 8px;
    padding: 0.8rem 1.5rem;
    font-weight: bold;
    width: 100%;
}
.btn-primary { background-color: var(--primary-color); }
.btn-primary:hover { background-color: #4a2475; }
.btn-secondary { background-color: #f0f0f0; color: #555; }
.btn-secondary:hover { background-color: #e0e0e0; }

.payment-options { display: flex; border: 1px solid #ccc; border-radius: 8px; overflow: hidden; }
.payment-option {
    flex: 1;
    padding: 0.75rem;
    background-color: #fff;
    border: none;
    color: #555;
    font-weight: 500;
    transition: all 0.2s ease;
}
.payment-option:first-child { border-right: 1px solid #ccc; }
.payment-option.active { background-color: var(--primary-color); color: #fff; }