:root {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --secondary: #a78bfa;
    --bg-dark: #0a0a0a;
    --card-bg: rgba(20, 20, 20, 0.8);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: rgba(139, 92, 246, 0.2);
    --input-bg: rgba(255, 255, 255, 0.03);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    overflow-x: hidden;
}

.background-radial {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% -20%, #2e1065 0%, transparent 50%),
                radial-gradient(circle at 0% 100%, #1e1b4b 0%, transparent 40%);
    z-index: -1;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: 800px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

header {
    margin-bottom: 3rem;
    text-align: center;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
}

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

header p {
    color: var(--text-muted);
    font-weight: 300;
}

.progress-container {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    margin-top: 2rem;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 16.66%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: var(--transition);
    border-radius: 10px;
    box-shadow: 0 0 15px var(--primary);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

h2::before {
    content: '';
    display: block;
    width: 4px;
    height: 24px;
    background: var(--primary);
    border-radius: 2px;
}

.form-step {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

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

.input-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
textarea,
select {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
    box-shadow: 0 0 0 1px var(--primary);
}

textarea {
    min-height: 120px;
    resize: vertical;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.radio-group, .checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.radio-group.horizontal {
    flex-direction: row;
}

.radio-item, .checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    background: var(--input-bg);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 1px solid transparent;
    transition: var(--transition);
}

.radio-item:hover, .checkbox-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.radio-item input, .checkbox-item input {
    accent-color: var(--primary);
    width: 1.2rem;
    height: 1.2rem;
}

.radio-item input:checked + span,
.checkbox-item input:checked + span {
    color: var(--primary);
}

.radio-item:has(input:checked),
.checkbox-item:has(input:checked) {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
}

.form-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    gap: 1rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    font-size: 1rem;
    border: none;
}

.btn-next, .btn-submit {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    flex: 2;
}

.btn-next:hover, .btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(139, 92, 246, 0.5);
}

.btn-prev {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border);
    flex: 1;
}

.btn-prev:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hidden {
    display: none !important;
}

#feedback-message {
    text-align: center;
    padding: 2rem 0;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: 50%;
    color: white;
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    box-shadow: 0 0 30px var(--primary);
}

@media (max-width: 640px) {
    .container {
        padding: 2rem 1.5rem;
    }
    .grid-2 {
        grid-template-columns: 1fr;
    }
    .btn {
        padding: 0.8rem 1.5rem;
    }
}