/**
 * 내차팔기 페이지 스타일
 */

/* ==========================================================================
   히어로 섹션
   ========================================================================== */

.sell-hero {
    background: linear-gradient(135deg, #1e3a5f 0%, #0d1b2a 100%);
    padding: 80px 20px;
    text-align: center;
    color: #fff;
}

.sell-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.sell-hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.3;
}

.sell-hero-title .highlight {
    color: #3b82f6;
}

.sell-hero-desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.6;
}

.sell-hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #3b82f6;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ==========================================================================
   스텝 안내
   ========================================================================== */

.sell-steps {
    background: #f8fafc;
    padding: 60px 20px;
}

.steps-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: #fff;
    padding: 20px 24px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    flex: 1;
    max-width: 280px;
}

.step-number {
    width: 40px;
    height: 40px;
    background: #3b82f6;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-title {
    font-size: 1rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 4px;
}

.step-desc {
    font-size: 0.813rem;
    color: #64748b;
}

.step-arrow {
    color: #cbd5e1;
    flex-shrink: 0;
}

/* ==========================================================================
   폼 섹션
   ========================================================================== */

.sell-form-section {
    padding: 60px 20px;
    background: #fff;
}

.form-container {
    max-width: 700px;
    margin: 0 auto;
}

.form-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1e293b;
    text-align: center;
    margin-bottom: 40px;
}

.form-section {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid #e2e8f0;
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 8px;
}

.section-desc {
    font-size: 0.875rem;
    color: #64748b;
    margin-bottom: 20px;
}

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

.form-row:last-child {
    margin-bottom: 0;
}

.form-row.two-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 8px;
}

.form-group .required {
    color: #ef4444;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 0.938rem;
    color: #1e293b;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #9ca3af;
}

.input-hint {
    font-size: 0.75rem;
    color: #6b7280;
    margin-top: 6px;
}

/* 라디오 버튼 그룹 */
.radio-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.radio-item input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: #3b82f6;
}

.radio-item span {
    font-size: 0.875rem;
    color: #374151;
}

/* 체크박스 */
.checkbox-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    cursor: pointer;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: #3b82f6;
}

.checkbox-item span {
    font-size: 0.875rem;
    color: #374151;
}

.checkbox-item a {
    color: #3b82f6;
    text-decoration: underline;
}

/* ==========================================================================
   사진 업로드
   ========================================================================== */

.photo-upload-area {
    border: 2px dashed #d1d5db;
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.photo-upload-area:hover {
    border-color: #3b82f6;
    background: rgba(59, 130, 246, 0.02);
}

.photo-upload-area.dragover {
    border-color: #3b82f6;
    background: rgba(59, 130, 246, 0.05);
}

.upload-placeholder svg {
    color: #9ca3af;
    margin-bottom: 12px;
}

.upload-placeholder p {
    font-size: 0.938rem;
    color: #374151;
    margin-bottom: 4px;
}

.upload-placeholder span {
    font-size: 0.813rem;
    color: #9ca3af;
}

.photo-preview {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-top: 16px;
}

.preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 8px;
    overflow: hidden;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-item .remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.preview-item .remove-btn:hover {
    background: rgba(239, 68, 68, 0.8);
}

/* ==========================================================================
   폼 액션
   ========================================================================== */

.form-actions {
    text-align: center;
    margin-top: 40px;
}

.btn-submit {
    display: inline-block;
    padding: 16px 48px;
    background: #3b82f6;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.063rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.btn-submit:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

.btn-submit:active {
    transform: translateY(0);
}

/* ==========================================================================
   반응형
   ========================================================================== */

@media (max-width: 768px) {
    .sell-hero {
        padding: 60px 20px;
    }

    .sell-hero-title {
        font-size: 1.75rem;
    }

    .sell-hero-desc {
        font-size: 1rem;
    }

    .sell-hero-stats {
        gap: 30px;
    }

    .stat-number {
        font-size: 1.25rem;
    }

    .steps-container {
        flex-direction: column;
        gap: 16px;
    }

    .step-item {
        max-width: 100%;
        width: 100%;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .form-row.two-cols {
        grid-template-columns: 1fr;
    }

    .photo-preview {
        grid-template-columns: repeat(3, 1fr);
    }

    .btn-submit {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .sell-hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .radio-group {
        flex-direction: column;
        gap: 12px;
    }
}

/* ==========================================================================
   폼 메시지
   ========================================================================== */

.form-message {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 0.95rem;
    animation: slideDown 0.3s ease;
}

.form-message-success {
    background: #ecfdf5;
    border: 1px solid #10b981;
    color: #065f46;
}

.form-message-error {
    background: #fef2f2;
    border: 1px solid #ef4444;
    color: #991b1b;
}

.message-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.85rem;
}

.form-message-success .message-icon {
    background: #10b981;
    color: #fff;
}

.form-message-error .message-icon {
    background: #ef4444;
    color: #fff;
}

.message-text {
    flex: 1;
}

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

/* 로딩 상태 */
.btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-submit .loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
}