/* ============================================
   BGM投稿ページ スタイル
   ============================================ */

/* ヘッダーの戻るリンク */
.bgm-back-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.bgm-back-nav:hover {
    color: var(--primary-color);
}

/* ============================================
   BGM一覧ページ：投稿リンクエリア
   ============================================ */
.bgm-upload-link-section {
    padding: 0 0 var(--spacing-2xl);
}

.bgm-upload-link-area {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.bgm-upload-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.75rem 1.75rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #ffffff;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: opacity var(--transition-base), transform var(--transition-base),
                box-shadow var(--transition-base);
}

.bgm-upload-link:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   フォームラッパー
   ============================================ */
.upload-form-wrapper {
    max-width: 560px;
    margin: 0 auto;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* ============================================
   フォーム要素
   ============================================ */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: var(--spacing-md);
}

.form-label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-required {
    color: #ef4444;
    margin-left: 3px;
}

.form-input {
    width: 100%;
    padding: 0.65rem 0.875rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--text-light);
    margin: 0;
}

/* ============================================
   ファイル入力
   ============================================ */
.file-input-wrapper {
    position: relative;
}

.file-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 1;
}

.file-input-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.65rem 0.875rem;
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    cursor: pointer;
    transition: border-color var(--transition-base), background var(--transition-base);
    user-select: none;
}

.file-input-label:hover {
    border-color: var(--primary-color);
    background: var(--bg-primary);
    color: var(--primary-color);
}

.file-input-label svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.file-input-label span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ============================================
   送信ボタン
   ============================================ */
.form-actions {
    margin-top: var(--spacing-lg);
}

.upload-submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 0.85rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #ffffff;
    font-size: 1rem;
    font-weight: 700;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.upload-submit-btn:hover:not(:disabled) {
    opacity: 0.9;
    transform: translateY(-1px);
}

.upload-submit-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.upload-submit-btn svg {
    width: 20px;
    height: 20px;
}

/* ============================================
   プログレス
   ============================================ */
.upload-progress-area {
    margin-top: var(--spacing-lg);
}

.upload-progress-track {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 99px;
    overflow: hidden;
}

.upload-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 99px;
    transition: width 0.3s ease;
}

.upload-progress-text {
    margin: var(--spacing-sm) 0 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
}

/* ============================================
   メッセージ
   ============================================ */
.upload-message {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.upload-message-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #16a34a;
}

.upload-message-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #dc2626;
}

.upload-message-success a {
    display: block;
    width: fit-content;
    margin: var(--spacing-sm) auto 0;
    padding: 0.5rem 1.25rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #ffffff;
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.upload-message-success a:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.upload-message-error a {
    color: inherit;
    font-weight: 600;
    text-decoration: underline;
}

/* ============================================
   レスポンシブ
   ============================================ */
@media (max-width: 640px) {
    .upload-form-wrapper {
        padding: var(--spacing-lg) var(--spacing-md);
        border-radius: var(--radius-lg);
    }
}