.submission-shell {
  min-height: calc(100vh - 72px);
  padding: 22px;
}

.submission-intro,
.submission-panel,
.mode-tabs {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.submission-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: end;
  margin-bottom: 16px;
  padding: clamp(18px, 3vw, 28px);
}

.submission-intro h1 {
  max-width: 780px;
}

.submission-intro .muted {
  max-width: 820px;
  margin-bottom: 0;
  line-height: 1.6;
}

.submission-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.mode-tabs {
  display: inline-flex;
  gap: 6px;
  margin-bottom: 16px;
  padding: 5px;
  background: var(--panel-2);
}

.mode-tabs button {
  border: 0;
  border-radius: 6px;
  padding: 10px 14px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 850;
}

.mode-tabs button.active {
  background: var(--panel);
  color: var(--accent-strong);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

.submission-grid {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr) minmax(240px, 320px);
  gap: 16px;
  align-items: start;
}

.submission-grid.is-new-mode {
  grid-template-columns: minmax(0, 980px);
  justify-content: center;
}

.submission-grid.is-new-mode .submission-form,
.submission-grid.is-new-mode .side-help {
  width: min(100%, 980px);
}

.submission-grid.is-new-mode .side-help {
  grid-column: 1;
  position: static;
  max-height: none;
}

.submission-panel {
  padding: 16px;
}

.title-finder,
.side-help {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 112px);
  overflow: auto;
}

.title-finder[hidden] {
  display: none;
}

.simple-title-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.simple-title-list button {
  display: grid;
  gap: 4px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px;
  background: var(--panel);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.simple-title-list button.active {
  border-color: var(--accent);
  box-shadow: inset 4px 0 0 var(--accent);
}

.simple-title-list strong {
  font-size: 0.95rem;
}

.simple-title-list small {
  color: var(--muted);
}

.submission-form {
  display: grid;
  gap: 16px;
  padding: 0;
  overflow: hidden;
}

.form-section {
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.form-section:last-child {
  border-bottom: 0;
}

.section-title {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  margin-bottom: 16px;
}

.section-title > span {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 900;
}

.section-title h2 {
  font-size: 1.12rem;
}

.section-title p {
  max-width: 760px;
  margin: 5px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.submission-form .form-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.submission-credit-row,
.submission-music-row,
.submission-gallery-row {
  display: grid;
  gap: 8px;
  align-items: start;
}

.submission-credit-row {
  grid-template-columns: minmax(130px, 1fr) minmax(130px, 1fr) minmax(130px, 1fr) minmax(110px, 0.8fr) auto;
}

.submission-music-row {
  grid-template-columns: minmax(130px, 1fr) minmax(130px, 1fr) minmax(110px, 0.9fr) minmax(110px, 0.8fr) auto;
}

.submission-gallery-row {
  grid-template-columns: minmax(150px, 1fr) minmax(140px, 1fr) minmax(140px, 1fr) auto;
}

.image-editor-grid {
  display: grid;
  grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
  gap: 14px;
}

.image-box {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
}

.image-box h3 {
  margin-top: 0;
}

.selected-file {
  min-height: 42px;
  margin: 0 0 10px;
  padding: 10px 12px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  overflow-wrap: anywhere;
  background: color-mix(in srgb, var(--panel) 68%, transparent);
}

.selected-file.has-file {
  color: var(--accent-strong);
  font-weight: 800;
}

.media-picker {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.media-picker summary {
  cursor: pointer;
  color: var(--accent-strong);
  font-weight: 850;
}

.media-picker-list,
.side-help .media-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.media-picker-list button,
.side-help .media-list button {
  display: grid;
  gap: 3px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px;
  background: var(--panel);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.media-picker-list button:focus,
.media-picker-list button:hover,
.side-help .media-list button:focus,
.side-help .media-list button:hover {
  border-color: var(--accent);
}

.side-help {
  display: grid;
  gap: 16px;
}

.side-help section + section {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.submission-panel .project-facts {
  margin-bottom: 0;
}

.duplicate-list,
.validation-list {
  display: grid;
  gap: 8px;
}

.duplicate-list button {
  display: grid;
  gap: 4px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: var(--panel);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.duplicate-list button:disabled {
  cursor: default;
  opacity: 1;
}

.duplicate-list small {
  color: var(--muted);
}

.validation-item {
  margin: 0;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  line-height: 1.4;
}

.validation-item.error {
  border-color: color-mix(in srgb, var(--danger) 55%, var(--line));
  color: var(--danger);
}

.validation-item.warn {
  border-color: color-mix(in srgb, #b7791f 55%, var(--line));
  color: color-mix(in srgb, #b7791f 86%, var(--text));
}

.validation-item.ok {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  color: var(--accent-strong);
}

@media (max-width: 1180px) {
  .submission-grid {
    grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  }

  .side-help {
    grid-column: 1 / -1;
    position: static;
    max-height: none;
  }
}

@media (max-width: 900px) {
  .submission-intro,
  .submission-grid,
  .image-editor-grid {
    grid-template-columns: 1fr;
  }

  .submission-actions {
    justify-content: flex-start;
  }

  .title-finder {
    position: static;
    max-height: 340px;
  }

  .submission-form .form-grid,
  .submission-credit-row,
  .submission-music-row,
  .submission-gallery-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .submission-shell {
    padding: 14px;
  }

  .mode-tabs {
    display: grid;
    width: 100%;
  }

  .section-title {
    grid-template-columns: 1fr;
  }
}