:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  /* Soft, low-saturation palette: warm paper, dusty periwinkle accent. */
  --bg: #f6f5f2;
  --surface: #fdfcfa;
  --surface-muted: #f3f1ec;
  --border: #e6e2da;
  --border-strong: #d6d1c7;
  --text: #3b3a37;
  --text-soft: #5f5d57;
  --muted: #75726a;
  --accent: #8b9dc3;
  --accent-hover: #7a8db5;
  --accent-strong: #56688f;
  --accent-soft: #e9edf5;
  --accent-text: #fdfcfa;
  --button-bg: #5c6d94;
  --button-hover: #52628a;
  --success: #8fb59a;
  --danger: #9c665f;
  --danger-border: #e6cbc7;
  --danger-soft: #f6e7e5;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.04);
  --shadow-hover: 0 2px 6px rgb(0 0 0 / 0.05);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--text);
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--bg);
}

button,
input,
textarea {
  font: inherit;
}

button {
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--button-bg);
  border-radius: 11px;
  color: var(--accent-text);
  background: var(--button-bg);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 120ms ease, background-color 120ms ease, box-shadow 120ms ease;
}

button:hover {
  border-color: var(--button-hover);
  background: var(--button-hover);
  box-shadow: var(--shadow-hover);
}

button:active {
  transform: translateY(1px);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.secondary {
  border-color: var(--border-strong);
  color: var(--text-soft);
  background: var(--surface);
}

.secondary:hover {
  border-color: var(--border-strong);
  background: var(--surface-muted);
}

.danger {
  border-color: var(--danger-border);
  color: var(--danger);
  background: var(--surface);
}

.danger:hover {
  border-color: var(--danger-border);
  background: var(--danger-soft);
}

.compact {
  min-height: 42px;
  padding: 0.55rem 0.9rem;
}

.shell {
  width: min(100% - 1.5rem, 1160px);
  margin: 0 auto;
  padding: 1.25rem 0 4rem;
}

.card {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.login-card {
  width: min(100%, 420px);
  margin: 12vh auto 0;
  padding: 1.75rem;
  text-align: center;
  box-shadow: var(--shadow-hover);
}

.brand-mark {
  display: grid;
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  place-items: center;
  border-radius: 14px;
  color: var(--accent-text);
  background: linear-gradient(145deg, var(--accent), var(--button-bg));
  box-shadow: var(--shadow);
  font-weight: 700;
}

.brand-mark.small {
  width: 40px;
  height: 40px;
  margin: 0;
  border-radius: 12px;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.35rem;
  font-size: 1.6rem;
}

h2 {
  margin-bottom: 0;
  font-size: 1.2rem;
}

h3 {
  margin: 0;
  font-size: 1rem;
}

.eyebrow {
  margin-bottom: 0.35rem;
  color: var(--accent-strong);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.login-card > .eyebrow {
  margin-bottom: 0.5rem;
}

label {
  display: block;
  margin-bottom: 0.45rem;
  font-weight: 600;
  text-align: left;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 11px;
  color: inherit;
  background: var(--surface);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

input {
  min-height: 48px;
  margin-bottom: 1rem;
  padding: 0.7rem 0.8rem;
}

textarea {
  display: block;
  min-height: 150px;
  padding: 0.9rem;
  line-height: 1.5;
  resize: vertical;
  font-family: var(--mono);
  font-size: 0.94rem;
}

.login-card button {
  width: 100%;
}

.full-width {
  width: 100%;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.15rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.auth-divider::before,
.auth-divider::after {
  height: 1px;
  flex: 1;
  background: var(--border);
  content: "";
}

.auth-status {
  min-height: 1.25rem;
  margin: 0.65rem 0 0;
  font-size: 0.82rem;
}

.code-form {
  text-align: left;
}

.code-intro {
  margin-bottom: 1.25rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
  text-align: center;
}

.code-input {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-align: center;
}

.text-button,
.text-button:hover {
  min-height: auto;
  margin-top: 0.85rem;
  padding: 0.35rem;
  border: 0;
  color: var(--accent-strong);
  background: transparent;
  box-shadow: none;
  font-size: 0.82rem;
}

.muted,
.status {
  color: var(--muted);
}

.error {
  min-height: 1.25rem;
  margin: 0.75rem 0 0;
  color: var(--danger);
}

.app-header,
.section-heading,
.form-footer,
.snippet-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.app-header {
  flex-wrap: wrap;
  margin-bottom: 1rem;
  padding: 0.25rem 0;
}

.app-header h1 {
  margin: 0;
}

.title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.title-group p {
  margin: 0.1rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  margin-left: auto;
}

.session-info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.1rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.3;
  text-align: right;
}

.session-relative {
  color: var(--accent-strong);
  font-weight: 600;
}

.environment-info {
  margin: 0.45rem 0 0;
  padding: 0 0.15rem;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.4;
}

.environment-info:empty {
  display: none;
}

.expiry-line {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.environment-bar {
  margin-bottom: 1rem;
}

.environment-strip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.environment-tabs {
  display: flex;
  flex: 0 1 auto;
  gap: 0.4rem;
  min-width: 0;
  padding: 0.25rem 0.15rem;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.tab,
.tab-add {
  min-height: 40px;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 11px;
  color: var(--text-soft);
  background: var(--surface);
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: none;
  white-space: nowrap;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex: 0 0 auto;
}

.tab:hover,
.tab-add:hover {
  border-color: var(--border-strong);
  background: var(--surface-muted);
  box-shadow: none;
}

.tab[aria-selected="true"],
.tab[aria-selected="true"]:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: var(--accent-soft);
  box-shadow: none;
}

.tab-label {
  max-width: 12rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab-remove {
  display: inline-grid;
  width: 1.3rem;
  height: 1.3rem;
  place-items: center;
  border-radius: 999px;
  background: rgb(95 113 153 / 0.12);
  font-size: 1rem;
  line-height: 1;
}

.tab-remove:hover {
  background: rgb(95 113 153 / 0.24);
}

.tab-add {
  flex: 0 0 auto;
  width: 40px;
  padding: 0;
  color: var(--accent-strong);
  font-size: 1.3rem;
  line-height: 1;
}

.environment-form,
.environment-confirm {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.6rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface);
}

.environment-form input {
  flex: 1 1 10rem;
  min-height: 42px;
  margin: 0;
  padding: 0.5rem 0.75rem;
}

.environment-error {
  flex-basis: 100%;
  min-height: 0;
  margin: 0;
  font-size: 0.82rem;
}

.environment-error:empty {
  display: none;
}

.environment-confirm p {
  flex: 1 1 14rem;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.45;
}

.environment-confirm-actions {
  display: flex;
  gap: 0.5rem;
}

.composer {
  padding: 1rem;
}

.composer-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.composer-heading label {
  margin: 0;
  font-size: 1.2rem;
}

.keyboard-hint {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.72rem;
}

.form-footer {
  align-items: flex-end;
  margin-top: 0.75rem;
}

.form-footer p {
  margin: 0;
}

.snippets-section {
  margin-top: 2rem;
}

.section-heading {
  margin-bottom: 0.8rem;
}

.section-title .eyebrow {
  margin-bottom: 0.25rem;
}

.title-line {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.count-badge {
  display: inline-grid;
  min-width: 1.6rem;
  height: 1.6rem;
  padding: 0 0.4rem;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent-strong);
  background: var(--accent-soft);
  font-size: 0.72rem;
  font-weight: 700;
}

.snippet-list {
  display: grid;
  gap: 0.8rem;
}

.snippet {
  padding: 1rem;
  transition: border-color 120ms ease, transform 120ms ease, box-shadow 120ms ease;
}

.snippet::before {
  display: block;
  width: 2.4rem;
  height: 3px;
  margin-bottom: 0.8rem;
  border-radius: 999px;
  background: var(--accent);
  opacity: 0.6;
  content: "";
}

.snippet:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-hover);
}

.snippet-text {
  margin: 0 0 0.85rem;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1.55;
  max-height: 18rem;
  overflow: auto;
  scrollbar-color: var(--border-strong) transparent;
}

.snippet-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.snippet-actions {
  justify-content: flex-end;
  margin-top: 0.75rem;
}

.empty-state {
  padding: 3.5rem 1.5rem;
  border: 1px dashed var(--border-strong);
  border-radius: 16px;
  color: var(--text-soft);
  background: var(--surface-muted);
  text-align: center;
}

.empty-state::before {
  display: block;
  width: 36px;
  height: 4px;
  margin: 0 auto 1rem;
  border-radius: 999px;
  background: var(--accent);
  opacity: 0.6;
  content: "";
}

.empty-state p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.files-section {
  margin-top: 2rem;
}

.files-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.upload-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  border: 1px solid var(--button-bg);
  border-radius: 10px;
  color: var(--accent-text);
  background: var(--button-bg);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 120ms ease, transform 120ms ease;
}

.upload-button:hover {
  border-color: var(--button-hover);
  background: var(--button-hover);
}

.upload-button:has(input:disabled) {
  opacity: 0.6;
  cursor: progress;
}

.upload-button:has(input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.file-list {
  display: grid;
  gap: 0.8rem;
}

.file {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.9rem 1rem;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.file:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-hover);
}

.file-info {
  min-width: 0;
  flex: 1 1 12rem;
}

.file-name {
  margin: 0 0 0.3rem;
  overflow-wrap: anywhere;
  font-weight: 600;
}

.file-meta {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.kind-badge {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--accent-strong);
  background: var(--accent-soft);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.file .snippet-actions {
  margin-top: 0;
}

.file-preview {
  margin-top: 1rem;
  padding: 1rem;
}

.file-preview-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.file-preview-name {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 1rem;
}

.file-preview-text {
  margin: 0;
  overflow: auto;
  max-height: 32rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1.55;
}

.markdown {
  max-height: 40rem;
  overflow: auto;
  overflow-wrap: anywhere;
  font-size: 0.95rem;
  line-height: 1.6;
}

.markdown > :first-child {
  margin-top: 0;
}

.markdown h1,
.markdown h2,
.markdown h3,
.markdown h4 {
  margin: 1.2em 0 0.5em;
  line-height: 1.25;
}

.markdown h1 { font-size: 1.5rem; }
.markdown h2 { font-size: 1.25rem; }
.markdown h3 { font-size: 1.05rem; }

.markdown p,
.markdown ul,
.markdown ol {
  margin: 0 0 0.9em;
}

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

.markdown code {
  padding: 0.1em 0.35em;
  border-radius: 6px;
  background: var(--accent-soft);
  font-family: var(--mono);
  font-size: 0.88em;
}

.markdown pre {
  margin: 0 0 0.9em;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-muted);
  overflow-x: auto;
}

.markdown pre code {
  padding: 0;
  background: none;
}

.markdown blockquote {
  margin: 0 0 0.9em;
  padding: 0.2em 1em;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.markdown table {
  border-collapse: collapse;
  margin: 0 0 0.9em;
  max-width: 100%;
  display: block;
  overflow-x: auto;
}

.markdown th,
.markdown td {
  padding: 0.35em 0.7em;
  border: 1px solid var(--border);
  text-align: left;
}

.markdown a {
  color: var(--accent-strong);
}

/* Links whose href was stripped (non-http/mailto) render as plain text. */
.markdown a:not([href]) {
  color: inherit;
  text-decoration: none;
}

.markdown hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 1.2em 0;
}

@media (min-width: 700px) {
  .shell {
    padding-top: 2.5rem;
  }

  .composer {
    padding: 1.25rem;
  }

  .snippet {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: end;
  }

  .snippet-text {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

  .snippet-actions {
    margin-top: 0;
  }
}

@media (min-width: 920px) {
  .shell {
    padding-top: 2rem;
  }

  .app-view {
    display: grid;
    grid-template-columns: minmax(330px, 0.78fr) minmax(460px, 1.22fr);
    gap: 1.5rem 2rem;
    align-items: start;
  }

  .app-header {
    grid-column: 1 / -1;
    margin-bottom: 0.25rem;
  }

  .environment-bar {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

  .composer {
    position: sticky;
    top: 2rem;
    padding: 1.35rem;
  }

  .composer textarea {
    min-height: 280px;
  }

  .snippets-section {
    margin-top: 0;
  }

  /* Keep these in the right column: a sticky grid item (the composer) is
     constrained by the grid container, so a full-width row would slide under it. */
  .files-section,
  .file-preview {
    grid-column: 2;
  }

  .files-section {
    margin-top: 0.5rem;
  }

  .snippet {
    padding: 1.15rem 1.25rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1f2124;
    --surface: #26292d;
    --surface-muted: #2d3035;
    --border: #363a40;
    --border-strong: #454a52;
    --text: #dcdad5;
    --text-soft: #c2bfb8;
    --muted: #8f8d87;
    --accent: #8b9dc3;
    --accent-hover: #9aabce;
    --accent-strong: #aebde0;
    --accent-soft: #2f3644;
    --accent-text: #1f2124;
    --button-bg: #8b9dc3;
    --button-hover: #9aabce;
    --danger: #d19a94;
    --danger-border: #55403e;
    --danger-soft: #3a2f2e;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.2);
    --shadow-hover: 0 2px 6px rgb(0 0 0 / 0.25);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}