:root {
  --bg: #eef6ff;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-soft: rgba(232, 242, 255, 0.82);
  --line: rgba(86, 126, 184, 0.16);
  --text: #14233d;
  --muted: #5e7598;
  --accent: #1bb6a0;
  --accent-strong: #55dcca;
  --danger: #c84c4c;
  --shadow: 0 24px 80px rgba(60, 94, 148, 0.16);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Segoe UI", "Aptos", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(85, 220, 202, 0.24), transparent 28%),
    radial-gradient(circle at 85% 15%, rgba(137, 186, 255, 0.32), transparent 24%),
    linear-gradient(135deg, #f8fbff 0%, #edf5ff 45%, #dfeeff 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 88%);
  pointer-events: none;
}

.app-shell {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 430px) minmax(0, 1fr);
}

.sidebar,
.workspace {
  padding: 32px;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(233, 243, 255, 0.58));
  backdrop-filter: blur(22px);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(0, 1.15fr);
  gap: 24px;
  align-items: start;
  align-content: start;
}

.composer-column {
  display: grid;
  gap: 24px;
  align-content: start;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.brand-icon {
  width: 72px;
  height: 72px;
  flex: none;
  filter: drop-shadow(0 20px 30px rgba(0, 0, 0, 0.35));
}

.brand-copy {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 6px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.74rem;
  color: var(--accent-strong);
}

h1,
h2,
p {
  margin: 0;
}

h1,
h2 {
  font-family: "Aptos Display", "Segoe UI Semibold", "Trebuchet MS", sans-serif;
  font-weight: 700;
  letter-spacing: -0.04em;
}

h1 {
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  line-height: 1;
  max-width: 10ch;
  overflow-wrap: normal;
  word-break: keep-all;
  hyphens: none;
}

h2 {
  font-size: clamp(1.25rem, 1.6vw, 1.55rem);
}

.intro {
  color: var(--muted);
  line-height: 1.55;
  font-size: 1rem;
}

.top-actions,
.editor-actions {
  display: flex;
  justify-content: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.login-form,
.status-panel,
.status-history-panel,
.editor-pane,
.hashtags-pane,
.segments-pane {
  background: linear-gradient(180deg, var(--panel), var(--panel-soft));
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.login-form,
.status-panel,
.status-history-panel {
  padding: 20px;
}

.login-form {
  display: grid;
  gap: 16px;
}

label,
.composer-label {
  display: grid;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--muted);
}

.field-hint {
  font-size: 0.82rem;
  color: var(--muted);
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(106, 145, 201, 0.18);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--text);
  padding: 14px 16px;
  outline: none;
  transition: border-color 180ms ease, transform 180ms ease, background 180ms ease;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(27, 182, 160, 0.5);
  background: rgba(255, 255, 255, 0.98);
}

input:disabled,
select:disabled,
textarea:disabled {
  background: rgba(231, 238, 247, 0.92);
  color: var(--muted);
  cursor: not-allowed;
}

textarea {
  resize: vertical;
  min-height: 220px;
  line-height: 1.55;
}

button {
  border: none;
  border-radius: 999px;
  padding: 13px 18px;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  cursor: pointer;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(27, 182, 160, 0.22);
}

button:disabled {
  opacity: 0.55;
  cursor: wait;
  transform: none;
  box-shadow: none;
}

button.is-danger,
button.is-danger:hover {
  color: #fff3f3;
  background: linear-gradient(135deg, #c84c4c, #8e2323);
  box-shadow: 0 12px 28px rgba(160, 40, 40, 0.22);
}

button.is-danger:disabled {
  opacity: 0.95;
  cursor: not-allowed;
  box-shadow: none;
}

.ghost-button {
  color: var(--text);
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(106, 145, 201, 0.18);
}

.link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.ghost-button.is-muted {
  color: var(--muted);
  background: rgba(225, 236, 248, 0.75);
  border: 1px solid rgba(106, 145, 201, 0.1);
  box-shadow: none;
}

.danger-button {
  color: #fff6f6;
  background: linear-gradient(135deg, #d76b6b, #b63f3f);
  border: 1px solid rgba(200, 76, 76, 0.4);
}

.danger-button:hover {
  box-shadow: 0 12px 28px rgba(160, 40, 40, 0.2);
}

.login-actions,
.primary-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.split-actions {
  grid-column: 1 / -1;
  margin-top: -4px;
  padding-top: 20px;
  border-top: 1px solid rgba(106, 145, 201, 0.12);
  justify-content: flex-end;
}

.publish-warning {
  width: 100%;
  margin: 0;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 245, 245, 0.9);
  border: 1px solid rgba(200, 76, 76, 0.2);
  color: var(--danger);
  font-weight: 600;
  line-height: 1.5;
  white-space: pre-line;
}

.status-panel {
  display: grid;
  gap: 6px;
}

.status-history-panel {
  display: grid;
}

#status-text {
  color: var(--text);
  line-height: 1.5;
}

.editor-pane,
.hashtags-pane,
.segments-pane {
  padding: 28px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.section-note {
  margin-top: 8px;
  max-width: 60ch;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}

.toggle input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.toggle-stack {
  display: grid;
  gap: 10px;
  justify-items: start;
}

.composer-meta {
  margin-top: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.92rem;
}

.composer-note {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.88rem;
}

.composer-note code {
  font-family: Consolas, "Courier New", monospace;
  background: rgba(225, 236, 248, 0.95);
  border-radius: 8px;
  padding: 0.1em 0.35em;
  color: var(--text);
}

.editor-actions {
  margin-top: 18px;
}

.split-actions-wrap {
  margin-top: 18px;
  display: grid;
  gap: 12px;
}

.status-history-button {
  width: 100%;
  justify-self: stretch;
}

.composer-lock-note {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 245, 245, 0.9);
  border: 1px solid rgba(200, 76, 76, 0.2);
  display: grid;
  gap: 12px;
}

.composer-lock-note p {
  color: var(--danger);
  line-height: 1.5;
}

.composer-lock-note .ghost-button {
  justify-self: start;
}

.composer-lock-note[hidden] {
  display: none;
}

.hashtag-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  margin-top: 12px;
}

.hashtag-placement-label {
  margin-top: 14px;
}

.hashtag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
  margin-top: 16px;
  min-height: 42px;
}

.hashtag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hashtag-chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(106, 145, 201, 0.18);
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.hashtag-chip:hover {
  transform: translateY(-1px);
}

.hashtag-chip.is-selected {
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  border-color: transparent;
}

.hashtag-chip--size-1 { font-size: 0.92rem; }
.hashtag-chip--size-2 { font-size: 1rem; }
.hashtag-chip--size-3 { font-size: 1.08rem; }
.hashtag-chip--size-4 { font-size: 1.16rem; }

.hashtag-tool {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.74);
  color: var(--muted);
  border: 1px solid rgba(106, 145, 201, 0.18);
}

.hashtag-tool svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.hashtag-tool:hover {
  box-shadow: none;
}

.hashtag-tool.danger {
  color: var(--danger);
}

.tips-title {
  margin-top: 2px;
  font-weight: 600;
  color: var(--text);
}

.tips-text {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.6;
}

.tips-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.segments-list {
  display: grid;
  gap: 16px;
}

.segment-card {
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(106, 145, 201, 0.12);
}

.segment-header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.88rem;
}

.segment-text {
  min-height: 140px;
  overflow: hidden;
  resize: none;
  white-space: pre-wrap;
}

.segment-image-actions {
  display: flex;
  justify-content: flex-start;
  margin-top: 14px;
}

.segment-images {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.segment-image-card {
  display: grid;
  gap: 8px;
  padding: 10px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(106, 145, 201, 0.14);
}

.segment-image-card.is-too-large {
  border-color: rgba(200, 76, 76, 0.7);
  box-shadow: inset 0 0 0 2px rgba(200, 76, 76, 0.22);
}

.segment-image-preview {
  width: 100%;
  aspect-ratio: 14 / 9;
  min-height: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(223, 235, 248, 0.8), rgba(246, 250, 255, 0.95));
}

.segment-image-preview canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.segment-image-meta {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.76rem;
}

.segment-image-meta span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.segment-image-meta .is-missing-alt {
  color: var(--danger);
  font-weight: 600;
}

.segment-image-meta .is-too-large {
  color: var(--danger);
  font-weight: 700;
}

.segment-image-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.segment-image-tool {
  min-width: 34px;
  height: 32px;
  padding: 0 8px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--muted);
  border: 1px solid rgba(106, 145, 201, 0.18);
}

.segment-image-tool svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.segment-image-tool:hover {
  box-shadow: none;
}

.segment-image-tool.danger {
  color: var(--danger);
}

.segment-image-tool.is-disabled {
  opacity: 0.45;
  pointer-events: none;
}

.history-sheet {
  width: min(92vw, 620px);
}

.history-list {
  display: grid;
  gap: 12px;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(106, 145, 201, 0.14);
}

.history-item-meta {
  display: grid;
  gap: 4px;
}

.history-item-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.history-timestamp,
.history-meta,
.history-empty {
  margin: 0;
}

.history-meta,
.history-empty {
  color: var(--muted);
}

.history-link {
  white-space: nowrap;
}

.image-editor-sheet {
  width: min(94vw, 760px);
}

.image-editor-stage {
  margin-top: 6px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(106, 145, 201, 0.14);
  background:
    linear-gradient(45deg, rgba(236, 243, 252, 0.9) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(236, 243, 252, 0.9) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(236, 243, 252, 0.9) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(236, 243, 252, 0.9) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
}

#image-editor-canvas {
  width: 100%;
  height: auto;
  display: block;
  touch-action: none;
}

.zoom-field {
  margin-top: 16px;
}

.settings-dialog {
  border: none;
  padding: 0;
  background: transparent;
}

.settings-dialog::backdrop {
  background: rgba(42, 72, 116, 0.28);
  backdrop-filter: blur(10px);
}

.settings-sheet {
  width: min(92vw, 420px);
  padding: 24px;
  border-radius: 28px;
  background: linear-gradient(180deg, var(--panel), var(--panel-soft));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  color: var(--text);
}

.help-sheet {
  width: min(92vw, 860px);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
}

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

.settings-block {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(106, 145, 201, 0.12);
}

.settings-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.settings-check {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  color: var(--text);
}

.settings-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.settings-note {
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.settings-note[data-tone="error"] {
  color: var(--danger);
}

.help-content {
  margin-top: 10px;
  overflow: auto;
  padding-right: 6px;
  color: var(--text);
  line-height: 1.65;
}

.help-content h1,
.help-content h2,
.help-content h3 {
  margin: 1.2em 0 0.45em;
  color: var(--text);
}

.help-content h1:first-child,
.help-content h2:first-child,
.help-content h3:first-child,
.help-content p:first-child {
  margin-top: 0;
}

.help-content p,
.help-content ul,
.help-content ol,
.help-content pre {
  margin: 0 0 1em;
}

.help-content ul,
.help-content ol {
  padding-left: 1.4em;
}

.help-content code {
  font-family: Consolas, "Courier New", monospace;
  background: rgba(225, 236, 248, 0.95);
  border-radius: 8px;
  padding: 0.1em 0.35em;
}

.help-content pre {
  overflow: auto;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(225, 236, 248, 0.95);
  border: 1px solid rgba(106, 145, 201, 0.12);
}

.help-content pre code {
  background: transparent;
  padding: 0;
}

.help-content a {
  color: #1466d6;
}

.help-centered {
  text-align: center;
}

.help-centered img {
  max-width: min(140px, 100%);
  height: auto;
}

.close-button {
  color: var(--text);
}

.is-hidden {
  display: none;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .composer-column {
    gap: 20px;
  }

  .split-actions {
    justify-content: stretch;
  }

  .split-actions button {
    width: 100%;
  }

  .hashtag-form {
    grid-template-columns: 1fr;
  }

  .editor-pane,
  .hashtags-pane,
  .segments-pane {
    padding: 22px;
  }

  .brand-block {
    width: 100%;
    align-items: flex-start;
  }

  .brand-copy {
    flex: 1;
  }

  h1 {
    max-width: none;
    font-size: clamp(1.55rem, 8vw, 2.1rem);
  }

  .intro {
    width: 100%;
    max-width: none;
  }

  .top-actions {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .sidebar,
  .workspace {
    padding: 20px;
  }

  .brand-block {
    gap: 12px;
  }

  .brand-icon {
    width: 60px;
    height: 60px;
  }

  .top-actions .ghost-button {
    flex: 1 1 calc(50% - 6px);
  }

  .history-item {
    flex-direction: column;
    align-items: stretch;
  }

  .history-item-actions {
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .sidebar,
  .editor-pane,
  .segments-pane {
    animation: rise-in 700ms cubic-bezier(.2, .9, .2, 1) both;
  }

  .segments-pane {
    animation-delay: 120ms;
  }

  .segment-card {
    animation: fade-up 360ms ease both;
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(26px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}