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

:root {
    --bg-color: #0a0a0f;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --success: #10b981;
    --danger: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-color);
    background-image: 
        radial-gradient(ellipse at top, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at bottom, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.progress-section {
    margin-bottom: 30px;
}

.progress-bar {
    height: 6px;
    background: var(--card-bg);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 12px;
    border: 1px solid var(--card-border);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent) 0%, #a855f7 100%);
    width: 0%;
    transition: width 0.4s ease;
    box-shadow: 0 0 20px var(--accent-glow);
}

.step-indicator,
.completion-indicator {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 6px;
}

.completion-indicator span {
    color: var(--accent);
    font-weight: 600;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.step h2 {
    font-size: 1.75rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.option-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.option-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.2);
}

.option-card.selected {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.option-card.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon svg {
    width: 32px;
    height: 32px;
}

.option-card span {
    font-size: 0.95rem;
    font-weight: 500;
}

.other-input {
    margin-top: 15px;
}

.other-input input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.other-input input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.other-input input::placeholder {
    color: var(--text-secondary);
}

.form-section {
    margin-bottom: 20px;
}

.form-section label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-section input[type="text"],
.form-section textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-section input[type="text"]:focus,
.form-section textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-section input[type="text"]::placeholder,
.form-section textarea::placeholder {
    color: var(--text-secondary);
}

.form-section textarea {
    min-height: 80px;
    resize: vertical;
}

.toggle-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.toggle-option {
    flex: 1;
    min-width: 100px;
}

.toggle-option input[type="radio"] {
    display: none;
}

.toggle-option span {
    display: block;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toggle-option input[type="radio"]:checked + span {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

.toggle-option:hover span {
    background: rgba(255, 255, 255, 0.08);
}

.brief-content {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    white-space: pre-wrap;
    line-height: 1.8;
    font-size: 0.95rem;
}

.brief-content:empty {
    display: none;
}

.brief-content strong {
    color: var(--accent);
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.action-btn {
    padding: 14px 24px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.action-btn.primary {
    background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.action-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.action-btn.secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
}

.action-btn.secondary:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--danger);
}

.navigation {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 25px;
}

.nav-btn {
    flex: 1;
    padding: 14px 24px;
    border: none;
    border-radius: 10px;
    font-size: 1.15rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.nav-btn:disabled {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    cursor: not-allowed;
    box-shadow: none;
}

.nav-btn:not(:disabled) {
    background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.nav-btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

footer {
    text-align: center;
    margin-top: 30px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(16, 185, 129, 0.9);
    color: white;
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    opacity: 0;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }

    header h1 {
        font-size: 2rem;
    }

    .card {
        padding: 20px;
        border-radius: 16px;
    }

    .step h2 {
        font-size: 1.5rem;
    }

    .options-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 10px;
    }

    .option-card {
        padding: 15px 10px;
    }

    .card-icon {
        font-size: 1.5rem;
    }

    .option-card span {
        font-size: 0.85rem;
    }

    .action-buttons {
        gap: 10px;
    }

    .action-btn {
        padding: 12px 20px;
        font-size: 0.95rem;
    }

    .nav-btn {
        padding: 12px 20px;
        font-size: 0.95rem;
    }

    .toggle-group {
        flex-direction: column;
    }

    .toggle-option {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .card {
        padding: 15px;
    }

    .options-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .step h2 {
        font-size: 1.25rem;
    }
}