/* ============================================================
   AI 剪辑独立页面
   ============================================================ */
.ai-edit-page {
    background: radial-gradient(1200px 500px at 80% -10%, rgba(255, 45, 85, .08), transparent 60%),
                radial-gradient(1000px 500px at 10% 0%, rgba(37, 244, 238, .06), transparent 55%),
                #0b0c12;
    min-height: 100vh;
}

.ai-edit-topnav {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 28px;
    background: rgba(11, 12, 18, .82);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.ai-edit-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #9a9aaa;
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, .08);
    transition: all .25s var(--v2-ease, cubic-bezier(.22, .61, .36, 1));
}
.ai-edit-back:hover {
    color: #fff;
    border-color: rgba(255, 255, 255, .2);
    background: rgba(255, 255, 255, .04);
    transform: translateX(-2px);
}
.ai-edit-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 800;
    letter-spacing: .01em;
    color: #fff;
}
.ai-edit-brand svg { flex-shrink: 0; }
.ai-edit-user {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 10px;
}
.ai-edit-user-name {
    font-size: 13.5px;
    color: #e8e8f0;
    font-weight: 600;
    padding: 7px 14px;
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 99px;
}
.ai-edit-user .btn-user-login,
.ai-edit-user .btn-user-logout {
    padding: 8px 18px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, .1);
    background: rgba(255, 255, 255, .04);
    color: #e0e0ea;
    font-size: 13px;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all .25s ease;
}
.ai-edit-user .btn-user-login:hover {
    background: linear-gradient(135deg, #FF2D55, #FF4D6D);
    border-color: transparent;
    color: #fff;
}

.ai-edit-main {
    max-width: 860px;
    margin: 0 auto;
    padding: 28px 20px 80px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.ai-edit-section {
    background: linear-gradient(170deg, rgba(19, 20, 28, .92), rgba(12, 13, 20, .96));
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 20px;
    padding: 24px;
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .045), 0 8px 28px rgba(0, 0, 0, .38);
    animation: fade-up .5s ease-out;
}
.ai-edit-section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 18px;
}
.step-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FF2D55, #FF4D6D);
    color: #fff;
    font-size: 13px;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(255, 45, 85, .3);
    flex-shrink: 0;
}

/* 素材选择 */
.ai-edit-material-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}
.ai-edit-upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(255, 45, 85, .18), rgba(37, 244, 238, .12));
    border: 1px solid rgba(255, 45, 85, .35);
    color: #ffc2cf;
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all .25s var(--v2-ease, cubic-bezier(.22, .61, .36, 1));
}
.ai-edit-upload-btn:hover {
    background: linear-gradient(135deg, rgba(255, 45, 85, .3), rgba(37, 244, 238, .2));
    box-shadow: 0 0 0 3px rgba(255, 45, 85, .12);
    transform: translateY(-1px);
    color: #fff;
}
.ai-edit-upload-status {
    font-size: 12.5px;
    color: #7a7a8a;
}
.ai-edit-upload-status.loading { color: #25F4EE; }
.ai-edit-upload-status.error { color: #f87171; }

.ai-edit-files {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 12px;
    max-height: 320px;
    overflow-y: auto;
    padding-right: 4px;
}
.ai-edit-files-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: #6a6a7a;
    font-size: 13px;
    padding: 30px 0;
}
.ai-edit-file-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 12px 14px;
    background: rgba(255, 255, 255, .035);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 12px;
    cursor: pointer;
    transition: all .25s var(--v2-ease, cubic-bezier(.22, .61, .36, 1));
}
.ai-edit-file-card:hover {
    border-color: rgba(37, 244, 238, .4);
    background: rgba(37, 244, 238, .05);
    transform: translateY(-1px);
}
.ai-edit-file-card.selected {
    border-color: #25F4EE;
    background: linear-gradient(135deg, rgba(37, 244, 238, .1), rgba(255, 45, 85, .06));
    box-shadow: 0 0 0 3px rgba(37, 244, 238, .1);
}
.ai-edit-file-name {
    font-size: 12.5px;
    color: #d8d8e4;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-family: var(--font-mono, monospace);
}
.ai-edit-file-meta {
    font-size: 11.5px;
    color: #6a6a7a;
    font-family: var(--font-mono, monospace);
}

.ai-edit-video-preview {
    margin-top: 16px;
}
.ai-edit-video-info {
    font-size: 12.5px;
    color: #8a8a9a;
    margin-top: 8px;
    word-break: break-all;
}

/* 登录引导 */
.ai-edit-login-hint {
    text-align: center;
    padding: 40px 20px;
    color: #8a8a9a;
}
.ai-edit-login-hint .btn-primary {
    margin-top: 14px;
    padding: 12px 34px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
}

/* 响应式 */
@media (max-width: 640px) {
    .ai-edit-topnav { padding: 12px 14px; gap: 10px; }
    .ai-edit-brand { font-size: 14.5px; }
    .ai-edit-main { padding: 18px 12px 60px; }
    .ai-edit-section { padding: 18px 14px; }
    .ai-edit-files { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}

/* AI 剪辑 toast */
.ai-edit-toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-12px);
    background: rgba(24, 25, 34, .96);
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 12px;
    padding: 12px 22px;
    font-size: 13.5px;
    color: #f0f0f6;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .5);
    opacity: 0;
    pointer-events: none;
    transition: all .3s var(--v2-ease, cubic-bezier(.22, .61, .36, 1));
    z-index: 999;
    max-width: 80vw;
    text-align: center;
}
.ai-edit-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.ai-edit-toast.error { border-color: rgba(248, 113, 113, .4); color: #fca5a5; }
.ai-edit-toast.success { border-color: rgba(52, 211, 153, .4); color: #a7f3d0; }

.ai-edit-done-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}
.ai-edit-done-actions .btn-primary {
    display: inline-block;
    padding: 10px 28px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
}