:root {
    --studio-bg: rgba(3, 9, 24, 0.78);
    --studio-surface: rgba(8, 18, 39, 0.78);
    --studio-surface-strong: rgba(10, 23, 48, 0.94);
    --studio-surface-soft: rgba(143, 215, 255, 0.065);
    --studio-border: rgba(168, 208, 230, 0.2);
    --studio-border-strong: rgba(143, 215, 255, 0.46);
    --studio-text: #f2f7fb;
    --studio-muted: #a8bccb;
    --studio-accent: #8fd7ff;
    --studio-accent-strong: #64c8ff;
    --studio-violet: #aa9cff;
    --studio-success: #73e0b2;
    --studio-warning: #ffd28d;
    --studio-danger: #ffaaa0;
    --studio-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

/* App-aligned Song Studio draft */
.is-app-song-draft .app-song-draft {
    display: grid;
    gap: 22px;
    width: min(760px, 100%);
    margin: 0 auto;
    padding: 4px 0 28px;
}
.app-song-draft-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.app-song-draft-header h2 { margin: 0; color: #fff; font-size: 1.3rem; }
.app-song-draft-header > div { display: flex; align-items: center; gap: 18px; }
.app-song-add, .app-song-close { width: 44px; height: 44px; padding: 0; border: 0; color: #fff; background: transparent; font: 300 2.1rem/1 system-ui,sans-serif; cursor: pointer; }
.app-song-draft > .studio-field { gap: 10px; }
.app-song-draft > .studio-field > span:first-child,
.app-song-draft .studio-field > span:first-child { color: #b9bdc5; }
.app-song-draft #studioPrompt { min-height: 150px; padding: 22px; border-color: transparent; border-radius: 17px; background: rgba(8,20,35,.92); font-size: 1.05rem; }
.app-song-draft .studio-mode-fieldset { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0; margin: 0; padding: 0; border: 0; }
.app-song-draft .studio-mode-fieldset legend { grid-column: 1/-1; margin-bottom: 10px; color: #b9bdc5; }
.app-song-draft .studio-mode-option { display: grid; min-height: 44px; padding: 0; border: 0; border-radius: 999px; background: rgba(29,29,35,.96); }
.app-song-draft .studio-mode-option span { display: grid; place-items: center; padding: 0 10px; }
.app-song-draft .studio-mode-option strong { font-size: .95rem; font-weight: 500; white-space: nowrap; }
.app-song-draft .studio-mode-option:has(input:checked),
.app-song-draft .app-image-mode-option { color: #111; background: #777982; }
.app-song-draft .studio-mode-option input { position: absolute; opacity: 0; pointer-events: none; }
.app-song-draft.is-image-mode .studio-mode-fieldset { grid-template-columns: repeat(4,minmax(0,1fr)); }
.app-song-mode-help { margin: -8px 0 0; color: #aeb3bc; line-height: 1.45; }
.app-song-toggle { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 48px; color: #fff; font-size: 1.05rem; }
.app-song-toggle input { appearance: none; position: relative; width: 58px; height: 34px; margin: 0; border-radius: 999px; background: #4c4e57; cursor: pointer; }
.app-song-toggle input::after { content: ''; position: absolute; top: 3px; left: 3px; width: 28px; height: 28px; border-radius: 50%; background: #fff; transition: transform .16s ease; }
.app-song-toggle input:checked { background: #29cc63; }
.app-song-toggle input:checked::after { transform: translateX(24px); }
.app-song-draft > .studio-card { padding: 0; border: 0; background: transparent; box-shadow: none; }
.app-song-draft > .studio-card .studio-card-heading,
.app-song-draft .studio-lyrics-guidance,
.app-song-draft #studioLyricRequirement,
.app-song-draft label[for="studioLyricRequirement"],
.app-song-draft .studio-field-meta,
.app-song-draft .studio-upload-zone,
.app-song-draft .studio-inline-note,
.app-song-draft .studio-mode-override,
.app-song-draft .studio-constraint-note { display: none !important; }
.app-song-draft #studioLyrics { min-height: 260px; border-radius: 17px; background: rgba(8,20,35,.92); }
.app-song-images { display: none; }
.app-song-draft.is-image-mode .app-song-images { display: grid; gap: 12px; }
.app-song-images .studio-image-list { display: flex; gap: 10px; }
.app-song-images .studio-image-item { width: 100px; padding: 0; border: 0; background: transparent; }
.app-song-images .studio-image-copy { display: none; }
.app-song-images .studio-image-item img { width: 100px; height: 100px; border-radius: 12px; object-fit: cover; }
.app-song-draft > label[for="studioDuration"] select,
.app-song-draft .studio-advanced-content > label select { width: 100%; }
.app-song-draft #studioDuration,
.app-song-draft #studioQuality,
.app-song-draft #studioOutputFormat { border-radius: 999px; text-align: center; }
.app-song-segments { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; overflow: hidden; padding: 3px; border-radius: 999px; background: rgba(29,29,35,.96); }
.app-song-segments button { min-height: 40px; padding: 0 8px; border: 0; border-radius: 999px; color: #f4f4f5; background: transparent; font: inherit; cursor: pointer; }
.app-song-segments button.is-active { color: #111; background: #777982; }
.app-song-segments button:disabled { opacity: .5; cursor: default; }
.app-song-draft label:has(> .app-song-segments-studioQuality) > span:first-child,
.app-song-draft label:has(> .app-song-segments-studioOutputFormat) > span:first-child { display: none; }
.app-song-draft .studio-advanced { padding: 0; border: 0; background: transparent; }
.app-song-draft .studio-advanced summary { padding: 4px 0 12px; color: #fff; font-size: 1.2rem; }
.app-song-draft .studio-advanced-content { display: grid; gap: 16px; padding: 0; }
.app-song-draft .studio-advanced-content input,
.app-song-draft .studio-advanced-content select,
.app-song-draft .studio-advanced-content textarea,
.app-song-draft > .studio-field input,
.app-song-draft > .studio-field select { min-height: 58px; border-color: transparent; border-radius: 14px; background: rgba(8,20,35,.92); }
.app-song-draft .studio-advanced-content textarea { min-height: 105px; }
.app-song-draft .studio-order-summary,
.app-song-draft .studio-submit-note { display: none; }
.app-song-draft > .studio-primary-button { width: 100%; min-height: 64px; justify-content: center; border: 0; border-radius: 17px; background: #3f5d68; font-size: 1.06rem; }
.app-song-draft > .studio-primary-button > span:last-child { display: none; }
@media(max-width:640px){
    .is-app-song-draft .app-song-draft{gap:18px;padding-inline:2px}
    .app-song-draft .studio-mode-option strong{font-size:.82rem}
    .app-song-draft.is-image-mode .studio-mode-option strong{font-size:.72rem;overflow:hidden;text-overflow:ellipsis;max-width:100%}
    .app-song-draft #studioPrompt{min-height:145px;padding:18px}
    .app-song-draft > .studio-primary-button{min-height:58px;font-size:.96rem}
}

/* Keep the App draft visually consistent with Image/Speech instead of the legacy blue Song Studio shell. */
.music-preview-section.is-studio-open:has(#studioCreatePanel:not([hidden])) {
    width: min(800px, calc(100vw - 32px));
    padding: 16px 20px 28px;
    border: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
}
.song-studio:has(#studioCreatePanel:not([hidden])) > .studio-hero,
.song-studio:has(#studioCreatePanel:not([hidden])) > .studio-tabs,
.song-studio:has(#studioCreatePanel:not([hidden])) > .studio-job-strip {
    display: none !important;
}
#studioCreatePanel:not([hidden]) { padding: 0; border: 0; background: transparent; box-shadow: none; }
#studioCreatePanel:not([hidden]) #songCreationForm { width: 100%; }
.is-app-song-draft .app-song-draft { width: min(760px, 100%); }
.app-song-draft #studioPrompt,
.app-song-draft #studioLyrics,
.app-song-draft .studio-advanced-content input,
.app-song-draft .studio-advanced-content select,
.app-song-draft .studio-advanced-content textarea,
.app-song-draft > .studio-field input,
.app-song-draft > .studio-field select {
    border: 1px solid rgba(255,255,255,.16);
    background: rgba(29,29,29,.62);
    box-shadow: none;
    backdrop-filter: blur(16px);
}
.app-song-draft .studio-mode-option,
.app-song-segments { background: rgba(27,27,33,.68); }
.app-song-draft .studio-mode-option:has(input:checked),
.app-song-draft .app-image-mode-option,
.app-song-segments button.is-active { color: #111; background: rgba(116,118,127,.88); }
.app-song-draft .studio-advanced,
.app-song-draft > .studio-card { background: transparent; box-shadow: none; }
.app-song-draft > .studio-primary-button {
    border: 1px solid rgba(255,255,255,.22);
    color: #fff;
    background: rgba(29,29,29,.68);
    box-shadow: none;
    backdrop-filter: blur(16px);
}
@media(max-width:640px){
    .music-preview-section.is-studio-open:has(#studioCreatePanel:not([hidden])) { width: calc(100vw - 20px); padding: 12px 10px 24px; }
}

.product-tabs[hidden],
.song-studio[hidden],
.song-studio [hidden],
.studio-panel[hidden],
.studio-notice[hidden],
.studio-job-strip[hidden],
.studio-tab-badge[hidden],
.studio-image-list:empty,
.studio-result-copy[hidden],
.studio-result-error[hidden],
.studio-voice-form[hidden],
.studio-title-form[hidden],
.studio-result-detail article[hidden],
.studio-field[hidden] {
    display: none !important;
}

.music-preview-section.is-studio-open {
    width: min(1240px, calc(100vw - 40px));
    max-width: 1240px;
    padding: 26px;
    background:
        radial-gradient(circle at 86% 0%, rgba(114, 103, 255, 0.12), transparent 34%),
        radial-gradient(circle at 5% 16%, rgba(100, 200, 255, 0.1), transparent 32%),
        rgba(0, 4, 16, 0.74);
    border: 1px solid rgba(143, 215, 255, 0.15);
    border-radius: 22px;
    box-shadow: var(--studio-shadow);
    backdrop-filter: blur(22px);
}

.music-preview-section.is-studio-open .app-main {
    width: 100%;
}

.product-tabs {
    display: inline-flex;
    gap: 5px;
    width: fit-content;
    margin: 0 0 18px;
    padding: 5px;
    background: rgba(2, 8, 22, 0.58);
    border: 1px solid rgba(168, 208, 230, 0.16);
    border-radius: 999px;
}

.product-tab,
.studio-tab,
.studio-chip,
.studio-ai-button,
.studio-primary-button,
.studio-primary-small,
.studio-secondary-button,
.studio-icon-text-button,
.studio-notice-action,
.studio-image-remove,
.studio-voice-action,
.studio-primary-link {
    font: inherit;
}

.product-tab {
    min-height: 38px;
    padding: 8px 18px;
    color: #9fb3c2;
    background: transparent;
    border: 0;
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 700;
    transition: color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.product-tab:hover {
    color: var(--studio-text);
}

.product-tab.is-active {
    color: #06111f;
    background: linear-gradient(135deg, #bcecff, var(--studio-accent));
    box-shadow: 0 7px 22px rgba(100, 200, 255, 0.2);
}

.song-studio {
    display: grid;
    gap: 20px;
    width: 100%;
    min-width: 0;
    color: var(--studio-text);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    text-align: left;
}

.studio-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 28px;
    align-items: start;
    padding: 26px 28px;
    overflow: hidden;
    position: relative;
    background:
        radial-gradient(circle at 88% 10%, rgba(170, 156, 255, 0.24), transparent 28%),
        linear-gradient(135deg, rgba(17, 43, 75, 0.9), rgba(7, 15, 37, 0.94));
    border: 1px solid rgba(143, 215, 255, 0.26);
    border-radius: 18px;
}

.studio-hero::after {
    content: "";
    position: absolute;
    right: -72px;
    bottom: -110px;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(100, 200, 255, 0.19), transparent 66%);
    pointer-events: none;
}

.studio-eyebrow,
.studio-section-kicker {
    margin: 0 0 8px;
    color: var(--studio-accent);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.16em;
}

.studio-hero h1 {
    max-width: 760px;
    margin: 0;
    color: #f7fbff;
    font-size: clamp(1.9rem, 3.3vw, 3.15rem);
    line-height: 1.08;
    letter-spacing: -0.035em;
    text-wrap: balance;
}

.studio-intro {
    max-width: 680px;
    margin: 12px 0 0;
    color: #b8cbd8;
    font-size: 1rem;
    line-height: 1.6;
}

.studio-connection {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    min-height: 32px;
    padding: 7px 11px;
    position: relative;
    z-index: 1;
    color: #bdcbd4;
    background: rgba(0, 7, 20, 0.42);
    border: 1px solid rgba(168, 208, 230, 0.2);
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 700;
    white-space: nowrap;
}

.studio-connection-dot {
    width: 7px;
    height: 7px;
    background: #7f91a1;
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(127, 145, 161, 0.1);
}

.studio-connection[data-state="online"] {
    color: #bff4dc;
    border-color: rgba(115, 224, 178, 0.25);
}

.studio-connection[data-state="online"] .studio-connection-dot {
    background: var(--studio-success);
    box-shadow: 0 0 0 4px rgba(115, 224, 178, 0.11), 0 0 15px rgba(115, 224, 178, 0.45);
}

.studio-tabs {
    display: flex;
    gap: 28px;
    overflow-x: auto;
    padding: 0 4px;
    border-bottom: 1px solid rgba(168, 208, 230, 0.15);
    scrollbar-width: none;
}

.studio-tabs::-webkit-scrollbar {
    display: none;
}

.studio-tab {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    min-height: 44px;
    margin-bottom: -1px;
    padding: 4px 0 11px;
    color: #93a9b8;
    background: transparent;
    border: 0;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 720;
    white-space: nowrap;
}

.studio-tab:hover {
    color: #dbeaf2;
}

.studio-tab.is-active {
    color: var(--studio-text);
    border-bottom-color: var(--studio-accent);
}

.studio-tab-badge {
    display: inline-grid;
    place-items: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    color: #071523;
    background: var(--studio-warning);
    border-radius: 999px;
    font-size: 0.68rem;
    font-weight: 900;
}

.studio-notice {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
    min-height: 48px;
    padding: 12px 15px;
    color: #c8e5f4;
    background: rgba(79, 159, 202, 0.11);
    border: 1px solid rgba(143, 215, 255, 0.26);
    border-radius: 12px;
    font-size: 0.88rem;
    line-height: 1.45;
}

.studio-notice.is-error {
    color: #ffd2cc;
    background: rgba(173, 66, 58, 0.13);
    border-color: rgba(255, 170, 160, 0.3);
}

.studio-notice.is-success {
    color: #c9f7e2;
    background: rgba(52, 150, 109, 0.13);
    border-color: rgba(115, 224, 178, 0.3);
}

.studio-notice-action {
    flex: 0 0 auto;
    padding: 5px 0;
    color: inherit;
    background: transparent;
    border: 0;
    border-bottom: 1px solid currentColor;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 800;
}

.studio-job-strip {
    display: grid;
    grid-template-columns: minmax(240px, 1fr) auto auto;
    gap: 22px;
    align-items: center;
    padding: 16px 18px;
    background: linear-gradient(135deg, rgba(58, 102, 152, 0.2), rgba(57, 39, 111, 0.18));
    border: 1px solid rgba(143, 215, 255, 0.28);
    border-radius: 14px;
}

.studio-job-copy {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    min-width: 0;
}

.studio-job-indicator {
    width: 12px;
    height: 12px;
    background: var(--studio-accent);
    border: 3px solid rgba(143, 215, 255, 0.2);
    border-radius: 50%;
    box-shadow: 0 0 0 5px rgba(143, 215, 255, 0.08);
    animation: studioPulse 1.8s ease-in-out infinite;
}

.studio-job-strip[data-status="success"] .studio-job-indicator {
    background: var(--studio-success);
    animation: none;
}

.studio-job-strip[data-status="failed"] .studio-job-indicator {
    background: var(--studio-danger);
    animation: none;
}

.studio-job-copy strong {
    display: block;
    color: var(--studio-text);
    font-size: 0.92rem;
}

.studio-job-copy p {
    margin: 3px 0 0;
    color: #aabfcd;
    font-size: 0.78rem;
    line-height: 1.4;
}

.studio-job-stages {
    display: flex;
    gap: 6px;
    align-items: center;
}

.studio-job-stages span {
    padding: 6px 9px;
    color: #79909f;
    background: rgba(0, 8, 22, 0.28);
    border-radius: 999px;
    font-size: 0.68rem;
    font-weight: 750;
}

.studio-job-stages span.is-complete {
    color: #d7f1ff;
    background: rgba(100, 200, 255, 0.13);
}

.studio-create-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.58fr) minmax(320px, 0.82fr);
    gap: 20px;
    align-items: start;
}

.studio-form-column,
.studio-settings-column,
.studio-panel {
    min-width: 0;
}

.studio-form-column {
    display: grid;
    gap: 18px;
}

.studio-settings-column {
    position: sticky;
    top: 18px;
}

.studio-card {
    min-width: 0;
    padding: 22px;
    background:
        linear-gradient(145deg, rgba(11, 25, 52, 0.78), rgba(4, 11, 28, 0.78));
    border: 1px solid var(--studio-border);
    border-radius: 16px;
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.16);
}

.studio-card-heading {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 12px;
    align-items: start;
    margin-bottom: 20px;
}

.studio-card-heading-action {
    grid-template-columns: auto minmax(0, 1fr) auto;
}

.studio-settings-heading {
    margin-bottom: 18px;
}

.studio-step {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    color: var(--studio-accent);
    background: rgba(143, 215, 255, 0.09);
    border: 1px solid rgba(143, 215, 255, 0.2);
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.studio-card h2,
.studio-card h3,
.studio-section-header h2,
.studio-result-detail h2,
.studio-result-detail h3 {
    color: var(--studio-text);
}

.studio-card-heading h2,
.studio-card-heading h3 {
    margin: 1px 0 0;
    font-size: 1.08rem;
    line-height: 1.3;
    text-align: left;
}

.studio-card-heading p {
    margin: 5px 0 0;
    color: var(--studio-muted);
    font-size: 0.8rem;
    line-height: 1.5;
}

.studio-field {
    display: grid;
    gap: 7px;
    min-width: 0;
    color: #d5e4ec;
    font-size: 0.78rem;
    font-weight: 720;
    text-align: left;
}

.studio-field + .studio-field {
    margin-top: 14px;
}

.studio-field-grid .studio-field + .studio-field {
    margin-top: 0;
}

.studio-field > span:first-child small {
    color: #738b9a;
    font-size: 0.72rem;
    font-weight: 600;
}

.studio-field input,
.studio-field textarea,
.studio-field select {
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    color: #eff7fb;
    background: rgba(0, 7, 22, 0.54);
    border: 1px solid rgba(168, 208, 230, 0.22);
    border-radius: 10px;
    outline: none;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 480;
    line-height: 1.5;
    transition: border-color 150ms ease, background-color 150ms ease, box-shadow 150ms ease;
}

.studio-field textarea {
    min-height: 104px;
    resize: vertical;
}

.studio-field-large textarea {
    min-height: 138px;
}

#studioLyrics {
    min-height: 286px;
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 0.84rem;
    line-height: 1.7;
}

.studio-field select {
    cursor: pointer;
}

.studio-field select option {
    color: #eff7fb;
    background: #0d1b34;
}

.studio-field input::placeholder,
.studio-field textarea::placeholder {
    color: #657e8f;
}

.studio-field input:disabled,
.studio-field textarea:disabled,
.studio-field select:disabled {
    color: #718694;
    cursor: not-allowed;
    opacity: 0.58;
}

.studio-field input:hover,
.studio-field textarea:hover,
.studio-field select:hover {
    border-color: rgba(143, 215, 255, 0.4);
}

.studio-field input:focus,
.studio-field textarea:focus,
.studio-field select:focus {
    background: rgba(4, 14, 34, 0.76);
    border-color: var(--studio-accent);
    box-shadow: 0 0 0 3px rgba(143, 215, 255, 0.1);
}

.studio-field input.is-invalid,
.studio-field textarea.is-invalid,
.studio-field select.is-invalid {
    border-color: var(--studio-danger);
    box-shadow: 0 0 0 3px rgba(255, 170, 160, 0.08);
}

.studio-field-meta {
    display: flex;
    gap: 12px;
    justify-content: space-between;
    color: #708998;
    font-size: 0.67rem;
    font-weight: 560;
    line-height: 1.45;
}

.studio-field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.studio-prompt-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 13px;
}

.studio-chip {
    min-height: 40px;
    padding: 7px 11px;
    color: #abc4d3;
    background: rgba(143, 215, 255, 0.055);
    border: 1px solid rgba(143, 215, 255, 0.16);
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 680;
}

.studio-chip:hover {
    color: #e8f7ff;
    background: rgba(143, 215, 255, 0.11);
    border-color: rgba(143, 215, 255, 0.4);
}

.studio-ai-button {
    align-self: center;
    min-height: 42px;
    padding: 8px 12px;
    color: #e4e0ff;
    background: rgba(170, 156, 255, 0.1);
    border: 1px solid rgba(170, 156, 255, 0.32);
    border-radius: 9px;
    cursor: pointer;
    font-size: 0.74rem;
    font-weight: 800;
    white-space: nowrap;
}

.studio-ai-button:hover {
    background: rgba(170, 156, 255, 0.17);
    border-color: rgba(170, 156, 255, 0.52);
}

.studio-ai-button.is-loading::after,
.studio-primary-button.is-loading::after,
.studio-primary-small.is-loading::after,
.studio-secondary-button.is-loading::after {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 8px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    vertical-align: -2px;
    animation: studioSpin 700ms linear infinite;
}

.studio-lyrics-guidance {
    margin-top: 0;
}

.studio-upload-zone {
    display: grid;
    place-items: center;
    gap: 5px;
    width: 100%;
    min-height: 150px;
    padding: 22px;
    color: #8ca5b5;
    background: rgba(3, 10, 25, 0.36);
    border: 1px dashed rgba(143, 215, 255, 0.3);
    border-radius: 13px;
    cursor: pointer;
    font: inherit;
    font-size: 0.75rem;
    text-align: center;
    transition: background-color 150ms ease, border-color 150ms ease;
}

.studio-upload-zone:hover,
.studio-upload-zone.is-dragging {
    background: rgba(100, 200, 255, 0.075);
    border-color: rgba(143, 215, 255, 0.68);
}

.studio-upload-zone strong {
    color: #dcecf4;
    font-size: 0.86rem;
}

.studio-upload-mark {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    margin-bottom: 4px;
    color: var(--studio-accent);
    background: rgba(143, 215, 255, 0.08);
    border: 1px solid rgba(143, 215, 255, 0.25);
    border-radius: 50%;
    font-size: 1.35rem;
    font-weight: 300;
}

.studio-image-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(118px, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.studio-image-item {
    min-width: 0;
    overflow: hidden;
    position: relative;
    background: rgba(0, 7, 22, 0.5);
    border: 1px solid rgba(168, 208, 230, 0.18);
    border-radius: 11px;
}

.studio-image-item img {
    display: block;
    width: 100%;
    aspect-ratio: 1.25;
    object-fit: cover;
}

.studio-image-copy {
    display: grid;
    gap: 2px;
    padding: 8px 9px;
}

.studio-image-copy strong,
.studio-image-copy span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.studio-image-copy strong {
    color: #d8e8f0;
    font-size: 0.67rem;
}

.studio-image-copy span {
    color: #748d9d;
    font-size: 0.61rem;
}

.studio-image-copy span.is-error {
    color: var(--studio-danger);
}

.studio-image-remove {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    padding: 0;
    position: absolute;
    top: 6px;
    right: 6px;
    color: #eff8fc;
    background: rgba(3, 8, 20, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
}

.studio-inline-note {
    margin: 13px 0 0;
    padding: 10px 12px;
    color: #c9bfff;
    background: rgba(170, 156, 255, 0.075);
    border-left: 2px solid var(--studio-violet);
    border-radius: 0 8px 8px 0;
    font-size: 0.73rem;
    line-height: 1.5;
}

.studio-mode-fieldset {
    display: grid;
    gap: 8px;
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
}

.studio-mode-fieldset legend {
    margin-bottom: 9px;
    color: #d5e4ec;
    font-size: 0.78rem;
    font-weight: 720;
}

.studio-mode-override,
.studio-constraint-note {
    margin: 0;
    padding: 9px 11px;
    color: #cdeeff;
    background: rgba(100, 200, 255, 0.08);
    border: 1px solid rgba(143, 215, 255, 0.24);
    border-radius: 9px;
    font-size: 0.73rem;
    font-weight: 720;
    line-height: 1.45;
}

.studio-constraint-note {
    margin-top: 12px;
    color: #c8bddf;
    background: rgba(170, 156, 255, 0.07);
    border-color: rgba(170, 156, 255, 0.22);
}

.studio-mode-option {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    min-height: 56px;
    padding: 10px 11px;
    color: #dbe8ee;
    background: rgba(0, 7, 22, 0.34);
    border: 1px solid rgba(168, 208, 230, 0.16);
    border-radius: 11px;
    cursor: pointer;
}

.studio-mode-option:hover {
    border-color: rgba(143, 215, 255, 0.36);
}

.studio-mode-option:has(input:checked) {
    background: rgba(100, 200, 255, 0.085);
    border-color: rgba(143, 215, 255, 0.52);
    box-shadow: inset 3px 0 0 var(--studio-accent);
}

.studio-mode-option:has(input:disabled) {
    cursor: not-allowed;
    opacity: 0.5;
}

.studio-mode-option input {
    width: 16px;
    height: 16px;
    margin: 0;
    accent-color: var(--studio-accent);
}

.studio-mode-option span {
    display: grid;
    gap: 2px;
}

.studio-mode-option strong {
    font-size: 0.78rem;
}

.studio-mode-option small {
    color: #718a9a;
    font-size: 0.7rem;
    line-height: 1.4;
}

.studio-settings-grid {
    margin-top: 18px;
}

.studio-advanced {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid rgba(168, 208, 230, 0.13);
}

.studio-advanced summary {
    color: #b9ccd7;
    cursor: pointer;
    font-size: 0.77rem;
    font-weight: 760;
    list-style-position: outside;
}

.studio-advanced summary::marker {
    color: var(--studio-accent);
}

.studio-advanced-content {
    display: grid;
    gap: 14px;
    margin-top: 16px;
}

.studio-advanced-content .studio-field + .studio-field {
    margin-top: 0;
}

.studio-order-summary {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 20px;
    padding: 12px;
    background: rgba(0, 7, 22, 0.42);
    border: 1px solid rgba(168, 208, 230, 0.13);
    border-radius: 11px;
}

.studio-order-summary div {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.studio-order-summary span {
    color: #6f8796;
    font-size: 0.61rem;
    font-weight: 700;
    text-transform: uppercase;
}

.studio-order-summary strong {
    color: #dceaf1;
    font-size: 0.72rem;
    overflow-wrap: anywhere;
    white-space: normal;
}

.studio-primary-button {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 50px;
    margin-top: 14px;
    padding: 12px 16px;
    color: #06111f;
    background: linear-gradient(135deg, #bdeeff, var(--studio-accent-strong));
    border: 1px solid rgba(190, 238, 255, 0.72);
    border-radius: 11px;
    box-shadow: 0 12px 30px rgba(54, 166, 224, 0.18);
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 850;
}

.studio-primary-button:hover {
    filter: brightness(1.06);
    transform: translateY(-1px);
}

.studio-submit-note {
    margin: 10px 0 0;
    padding: 9px 11px;
    color: #b6cbd6;
    background: rgba(255, 204, 128, 0.055);
    border: 1px solid rgba(255, 204, 128, 0.15);
    border-radius: 9px;
    font-size: 0.74rem;
    font-weight: 650;
    line-height: 1.5;
    text-align: left;
}

.studio-primary-small,
.studio-secondary-button,
.studio-icon-text-button,
.studio-primary-link,
.studio-voice-action {
    display: inline-flex;
    gap: 7px;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 8px 13px;
    border-radius: 9px;
    cursor: pointer;
    font-size: 0.74rem;
    font-weight: 800;
    line-height: 1.2;
    text-decoration: none;
}

.studio-primary-small,
.studio-primary-link {
    color: #071420;
    background: var(--studio-accent);
    border: 1px solid rgba(143, 215, 255, 0.72);
}

.studio-secondary-button,
.studio-icon-text-button,
.studio-voice-action {
    color: #c7d8e1;
    background: rgba(143, 215, 255, 0.06);
    border: 1px solid rgba(143, 215, 255, 0.2);
}

.studio-secondary-button:hover,
.studio-icon-text-button:hover,
.studio-voice-action:hover {
    color: #f2f9fc;
    background: rgba(143, 215, 255, 0.11);
    border-color: rgba(143, 215, 255, 0.4);
}

.studio-icon-text-button {
    min-height: 34px;
    padding: 7px 10px;
}

.studio-primary-button:disabled,
.studio-primary-small:disabled,
.studio-secondary-button:disabled,
.studio-ai-button:disabled,
.studio-chip:disabled,
.studio-voice-action:disabled,
.studio-image-remove:disabled,
.studio-upload-zone:disabled,
.studio-icon-text-button:disabled {
    cursor: not-allowed;
    opacity: 0.52;
    filter: none;
    transform: none;
}

.studio-section-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 20px;
    align-items: end;
    padding: 3px 2px;
}

.studio-section-header h2 {
    margin: 0;
    font-size: 1.7rem;
    letter-spacing: -0.02em;
    text-align: left;
}

.studio-section-header p:last-child {
    margin: 6px 0 0;
    color: var(--studio-muted);
    font-size: 0.82rem;
    line-height: 1.5;
}

.studio-results-layout {
    display: grid;
    grid-template-columns: minmax(250px, 0.72fr) minmax(0, 1.45fr);
    gap: 18px;
    margin-top: 18px;
}

.studio-result-list {
    display: grid;
    align-content: start;
    gap: 9px;
    max-height: 760px;
    overflow-y: auto;
    padding-right: 4px;
}

.studio-result-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 11px;
    align-items: center;
    width: 100%;
    min-width: 0;
    padding: 12px;
    color: #dce9f0;
    background: rgba(5, 14, 32, 0.66);
    border: 1px solid rgba(168, 208, 230, 0.15);
    border-radius: 12px;
    cursor: pointer;
    font: inherit;
    text-align: left;
}

.studio-result-card:hover {
    background: rgba(11, 27, 54, 0.76);
    border-color: rgba(143, 215, 255, 0.33);
}

.studio-result-card.is-active {
    background: rgba(100, 200, 255, 0.09);
    border-color: rgba(143, 215, 255, 0.52);
    box-shadow: inset 3px 0 0 var(--studio-accent);
}

.studio-result-card-mark {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    color: #c4d6e0;
    background: rgba(143, 215, 255, 0.08);
    border: 1px solid rgba(143, 215, 255, 0.15);
    border-radius: 10px;
    font-size: 0.9rem;
}

.studio-result-card[data-status="success"] .studio-result-card-mark {
    color: #bff4dc;
    background: rgba(115, 224, 178, 0.09);
}

.studio-result-card[data-status="failed"] .studio-result-card-mark {
    color: #ffd0ca;
    background: rgba(255, 170, 160, 0.08);
}

.studio-result-card-copy {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.studio-result-card-copy strong,
.studio-result-card-copy span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.studio-result-card-copy strong {
    color: #eef7fb;
    font-size: 0.78rem;
}

.studio-result-card-copy span,
.studio-result-card-time {
    color: #738b9a;
    font-size: 0.64rem;
}

.studio-result-detail {
    min-height: 390px;
    padding: 22px;
    background:
        radial-gradient(circle at 100% 0%, rgba(170, 156, 255, 0.1), transparent 33%),
        rgba(5, 14, 32, 0.72);
    border: 1px solid rgba(168, 208, 230, 0.17);
    border-radius: 15px;
}

.studio-empty-state {
    display: grid;
    place-items: center;
    align-content: center;
    min-height: 340px;
    color: #708797;
    text-align: center;
}

.studio-empty-state > span {
    display: grid;
    place-items: center;
    width: 54px;
    height: 54px;
    margin-bottom: 10px;
    color: var(--studio-accent);
    background: rgba(143, 215, 255, 0.07);
    border: 1px solid rgba(143, 215, 255, 0.16);
    border-radius: 50%;
    font-size: 1.25rem;
}

.studio-empty-state h3 {
    margin: 0;
    font-size: 0.95rem;
}

.studio-empty-state p {
    max-width: 300px;
    margin: 7px 0 0;
    color: #718897;
    font-size: 0.75rem;
    line-height: 1.5;
}

.studio-result-title-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    align-items: start;
}

.studio-result-title-row h2 {
    margin: 8px 0 0;
    font-size: clamp(1.4rem, 3vw, 2.15rem);
    line-height: 1.15;
    letter-spacing: -0.025em;
    overflow-wrap: anywhere;
    text-align: left;
}

.studio-status-badge {
    display: inline-flex;
    align-items: center;
    min-height: 25px;
    padding: 4px 8px;
    color: #c6d8e1;
    background: rgba(143, 215, 255, 0.08);
    border: 1px solid rgba(143, 215, 255, 0.18);
    border-radius: 999px;
    font-size: 0.62rem;
    font-weight: 850;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.studio-status-badge[data-status="success"] {
    color: #bff4dc;
    background: rgba(115, 224, 178, 0.08);
    border-color: rgba(115, 224, 178, 0.26);
}

.studio-status-badge[data-status="failed"] {
    color: #ffd1cb;
    background: rgba(255, 170, 160, 0.08);
    border-color: rgba(255, 170, 160, 0.25);
}

.studio-title-form {
    display: grid;
    gap: 10px;
    margin-top: 16px;
    padding: 14px;
    background: rgba(0, 7, 22, 0.4);
    border: 1px solid rgba(143, 215, 255, 0.15);
    border-radius: 11px;
}

.studio-inline-actions,
.studio-result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    align-items: center;
}

.studio-result-audio {
    width: 100%;
    margin-top: 22px;
    color-scheme: dark;
    accent-color: var(--studio-accent);
}

.studio-result-actions {
    margin-top: 14px;
}

.studio-result-meta {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    margin: 22px 0 0;
}

.studio-result-meta div {
    min-width: 0;
    padding: 10px;
    background: rgba(0, 7, 22, 0.32);
    border: 1px solid rgba(168, 208, 230, 0.1);
    border-radius: 9px;
}

.studio-result-meta dt {
    color: #6f8797;
    font-size: 0.58rem;
    font-weight: 750;
    text-transform: uppercase;
}

.studio-result-meta dd {
    overflow: hidden;
    margin: 4px 0 0;
    color: #d9e8ef;
    font-size: 0.7rem;
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.studio-result-copy,
.studio-result-error {
    margin-top: 21px;
    padding-top: 17px;
    border-top: 1px solid rgba(168, 208, 230, 0.12);
}

.studio-result-copy h3,
.studio-result-error h3 {
    margin: 0 0 9px;
    font-size: 0.8rem;
    text-align: left;
}

.studio-result-copy p,
.studio-result-error p,
.studio-result-copy pre {
    margin: 0;
    color: #9fb4c1;
    font-size: 0.75rem;
    line-height: 1.7;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.studio-result-copy pre {
    max-height: 430px;
    overflow-y: auto;
    padding: 14px;
    background: rgba(0, 7, 22, 0.32);
    border-radius: 10px;
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.studio-result-error {
    color: #ffd2cc;
}

.studio-result-error p {
    color: #eeb5ad;
}

.studio-list-empty {
    padding: 34px 20px;
    color: #718999;
    background: rgba(5, 14, 32, 0.46);
    border: 1px dashed rgba(168, 208, 230, 0.18);
    border-radius: 12px;
    font-size: 0.76rem;
    line-height: 1.5;
    text-align: center;
}

.studio-voice-form {
    display: grid;
    gap: 14px;
    max-width: 760px;
    margin-top: 18px;
}

.studio-voice-form .studio-card-heading {
    margin-bottom: 0;
}

.studio-voice-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 18px;
}

.studio-voice-card {
    display: grid;
    gap: 12px;
    min-width: 0;
    padding: 17px;
    background: rgba(5, 14, 32, 0.66);
    border: 1px solid rgba(168, 208, 230, 0.16);
    border-radius: 13px;
}

.studio-voice-card.is-system {
    background:
        radial-gradient(circle at 100% 0%, rgba(100, 200, 255, 0.08), transparent 38%),
        rgba(5, 14, 32, 0.66);
}

.studio-voice-card-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: start;
}

.studio-voice-card h3 {
    overflow: hidden;
    margin: 0;
    color: #edf6fa;
    font-size: 0.87rem;
    text-align: left;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.studio-voice-card p {
    display: -webkit-box;
    min-height: 40px;
    overflow: hidden;
    margin: 0;
    color: #8fa7b5;
    font-size: 0.72rem;
    line-height: 1.55;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.studio-voice-badge {
    padding: 4px 7px;
    color: #a9c2d0;
    background: rgba(143, 215, 255, 0.06);
    border: 1px solid rgba(143, 215, 255, 0.14);
    border-radius: 999px;
    font-size: 0.58rem;
    font-weight: 800;
    white-space: nowrap;
}

.studio-voice-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.studio-voice-action.is-danger {
    color: #ffc3bb;
    border-color: rgba(255, 170, 160, 0.22);
}

.studio-voice-action.is-confirming {
    color: #1a0907;
    background: var(--studio-danger);
    border-color: var(--studio-danger);
}

.product-tab:focus-visible,
.studio-tab:focus-visible,
.studio-chip:focus-visible,
.studio-ai-button:focus-visible,
.studio-primary-button:focus-visible,
.studio-primary-small:focus-visible,
.studio-secondary-button:focus-visible,
.studio-icon-text-button:focus-visible,
.studio-notice-action:focus-visible,
.studio-image-remove:focus-visible,
.studio-result-card:focus-visible,
.studio-voice-action:focus-visible,
.studio-primary-link:focus-visible,
.studio-upload-zone:focus-visible,
.studio-upload-zone:focus-within,
.studio-mode-option:focus-within {
    outline: 2px solid var(--studio-accent);
    outline-offset: 2px;
}

@keyframes studioPulse {
    0%, 100% { opacity: 0.72; transform: scale(0.88); }
    50% { opacity: 1; transform: scale(1); }
}

@keyframes studioSpin {
    to { transform: rotate(360deg); }
}

@media (max-width: 1040px) {
    .studio-create-layout {
        grid-template-columns: 1fr;
    }

    .studio-settings-column {
        position: static;
    }

    .studio-settings-card {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 18px;
    }

    .studio-settings-card > * {
        min-width: 0;
        margin-top: 0;
    }

    .studio-settings-heading,
    .studio-order-summary,
    .studio-primary-button,
    .studio-submit-note,
    .studio-constraint-note {
        grid-column: 1 / -1;
    }

    .studio-order-summary {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .studio-job-strip {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .studio-job-stages {
        display: none;
    }
}

@media (max-width: 768px) {
    .music-preview-section.is-studio-open {
        width: 100%;
        padding: 16px;
        border-radius: 16px;
    }

    .product-tabs {
        width: 100%;
    }

    .product-tab {
        flex: 1;
    }

    .studio-hero {
        grid-template-columns: 1fr;
        padding: 21px;
    }

    .studio-connection {
        justify-self: start;
    }

    .studio-create-layout,
    .studio-results-layout {
        grid-template-columns: 1fr;
    }

    .studio-settings-card {
        display: block;
    }

    .studio-settings-card > * + * {
        margin-top: 18px;
    }

    .studio-settings-card .studio-primary-button {
        margin-top: 14px;
    }

    .studio-settings-card .studio-submit-note {
        margin-top: 10px;
    }

    .studio-order-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .studio-ai-button,
    .studio-primary-small,
    .studio-secondary-button,
    .studio-icon-text-button,
    .studio-primary-link,
    .studio-voice-action {
        min-height: 44px;
    }

    .studio-job-strip {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .studio-job-strip .studio-secondary-button {
        width: 100%;
    }

    .studio-result-list {
        max-height: 360px;
    }

    .studio-result-detail {
        min-height: 320px;
    }

    .studio-voice-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .studio-hero h1 {
        font-size: 1.82rem;
    }

    .studio-card {
        padding: 17px;
        border-radius: 13px;
    }

    .studio-card-heading-action {
        grid-template-columns: auto minmax(0, 1fr);
    }

    .studio-card-heading-action .studio-ai-button {
        grid-column: 1 / -1;
        width: 100%;
    }

    .studio-field-grid,
    .studio-settings-grid,
    .studio-result-meta {
        grid-template-columns: 1fr;
    }

    .studio-order-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .studio-section-header,
    .studio-result-title-row {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .studio-section-header > button,
    .studio-result-title-row > button {
        width: 100%;
    }

    .studio-result-detail {
        padding: 17px;
    }

    .studio-result-actions > *,
    .studio-inline-actions > * {
        flex: 1 1 auto;
    }

    .studio-notice {
        align-items: flex-start;
        flex-direction: column;
    }

    .studio-field-meta {
        align-items: flex-start;
        flex-direction: column;
        gap: 3px;
    }
}

@media (min-width: 1041px) and (max-height: 820px) {
    .studio-settings-column {
        position: static;
    }
}

@media (prefers-reduced-motion: reduce) {
    .studio-job-indicator,
    .studio-ai-button.is-loading::after,
    .studio-primary-button.is-loading::after,
    .studio-primary-small.is-loading::after,
    .studio-secondary-button.is-loading::after {
        animation: none;
    }

    .product-tab,
    .studio-field input,
    .studio-field textarea,
    .studio-field select,
    .studio-primary-button {
        transition: none;
    }
}