:root {
  --sand: #f8f1e8;
  --paper: #fffaf5;
  --ink: #251d19;
  --muted: #6c5c51;
  --line: #e8d8ca;
  --accent: #c96d44;
  --accent-dark: #a55331;
  --olive: #6b7c5e;
  --shadow: 0 18px 42px rgba(50, 33, 19, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(201, 109, 68, 0.18), transparent 30%),
    linear-gradient(180deg, #fff7f0 0%, #f5ede4 100%);
}

a {
  color: inherit;
}

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

.penumbra-shell {
  width: min(1680px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.penumbra-shell--wide {
  width: min(1800px, calc(100% - 24px));
}

.penumbra-auth-shell {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
}

.penumbra-auth-card,
.penumbra-panel,
.penumbra-banner {
  background: rgba(255, 250, 245, 0.9);
  border: 1px solid rgba(232, 216, 202, 0.95);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.penumbra-auth-card {
  width: min(560px, 100%);
  padding: 36px;
}

.penumbra-kicker {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(201, 109, 68, 0.12);
  color: var(--accent-dark);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.penumbra-auth-card h1,
.penumbra-hero h1,
.penumbra-section-title {
  margin: 16px 0 10px;
  font-size: clamp(32px, 4vw, 54px);
  line-height: 0.98;
}

.penumbra-auth-card p,
.penumbra-hero p,
.penumbra-muted {
  color: var(--muted);
}

.penumbra-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.penumbra-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.penumbra-brand strong {
  font-size: 24px;
}

.penumbra-actions,
.penumbra-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.penumbra-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.penumbra-button:hover {
  transform: translateY(-1px);
}

.penumbra-button--primary {
  background: linear-gradient(135deg, var(--accent) 0%, #db8150 100%);
  color: #fff;
}

.penumbra-button--ghost {
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--line);
}

.penumbra-button--subtle {
  background: rgba(107, 124, 94, 0.14);
  color: #42513a;
}

.penumbra-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.penumbra-panel {
  padding: 26px;
}

.penumbra-hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
}

.penumbra-hero__copy {
  max-width: 760px;
}

.penumbra-grid {
  display: grid;
  gap: 24px;
}

.penumbra-grid--two {
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
}

.penumbra-grid--compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.penumbra-stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.penumbra-stat {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line);
}

.penumbra-stat strong {
  display: block;
  font-size: 28px;
}

.penumbra-banner {
  padding: 18px 22px;
  margin-bottom: 18px;
}

.penumbra-banner--warning {
  border-color: rgba(201, 109, 68, 0.26);
}

.penumbra-flash {
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  margin-bottom: 14px;
  border: 1px solid var(--line);
}

.penumbra-flash--success {
  background: rgba(107, 124, 94, 0.12);
}

.penumbra-flash--error {
  background: rgba(201, 109, 68, 0.12);
}

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

.penumbra-field {
  display: grid;
  gap: 8px;
}

.penumbra-field span,
.penumbra-field label {
  font-weight: 600;
}

.penumbra-field input,
.penumbra-field textarea,
.penumbra-field select {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: #fffdf9;
}

.penumbra-field textarea {
  min-height: 112px;
  resize: vertical;
}

.penumbra-field input[type="file"] {
  padding: 12px;
}

.penumbra-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.penumbra-checkbox input {
  width: 18px;
  height: 18px;
}

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

.penumbra-project {
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
}

.penumbra-project__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.penumbra-project__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
}

.penumbra-accent-dot {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  flex: 0 0 auto;
}

.penumbra-share {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(201, 109, 68, 0.4);
  background: rgba(255, 255, 255, 0.7);
}

.penumbra-share__row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.penumbra-share input {
  min-height: 48px;
  padding: 0 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
}

.penumbra-empty {
  display: grid;
  place-items: center;
  min-height: 120px;
  padding: 20px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
}

.penumbra-empty--floating {
  position: absolute;
  inset: 24px;
  pointer-events: none;
}

.penumbra-project-page {
  display: grid;
  gap: 24px;
}

.penumbra-project-layout {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 1fr) 360px;
}

.penumbra-project-layout__sidebar {
  display: grid;
  gap: 24px;
  align-content: start;
}

.penumbra-client-hero {
  margin-bottom: 24px;
}

.penumbra-client-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
}

.penumbra-whiteboard {
  display: grid;
  gap: 18px;
}

.penumbra-whiteboard__hint {
  margin: -6px 0 0;
  font-size: 14px;
}

.penumbra-whiteboard__toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.penumbra-whiteboard__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.penumbra-whiteboard__status {
  color: var(--muted);
  font-size: 14px;
}

.penumbra-upload-trigger input {
  display: none;
}

.penumbra-whiteboard__shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 20px;
}

.penumbra-whiteboard__viewport {
  position: relative;
  overflow: auto;
  min-height: 72vh;
  padding: 18px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(232, 216, 202, 0.9);
  background:
    linear-gradient(180deg, rgba(255, 252, 248, 0.9), rgba(247, 239, 230, 0.92));
  box-shadow: var(--shadow);
}

.penumbra-whiteboard__canvas {
  position: relative;
  min-width: 100%;
  min-height: 100%;
  border-radius: 24px;
  overflow: hidden;
}

.dotted-grid {
  background-color: #fcf8f3;
  background-image:
    radial-gradient(rgba(89, 74, 63, 0.12) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0));
  background-size: 22px 22px, 100% 100%;
  background-position: 11px 11px, 0 0;
}

.penumbra-drop-hint {
  position: absolute;
  inset: 28px;
  display: none;
  place-items: center;
  border-radius: 24px;
  border: 2px dashed rgba(201, 109, 68, 0.45);
  background: rgba(255, 250, 245, 0.86);
  color: var(--accent-dark);
  z-index: 60;
  pointer-events: none;
}

.penumbra-whiteboard.is-dropping .penumbra-drop-hint {
  display: grid;
}

.penumbra-whiteboard__inspector {
  display: grid;
  align-content: start;
}

.penumbra-whiteboard__inspector-card {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(232, 216, 202, 0.9);
  background: rgba(255, 250, 245, 0.92);
  box-shadow: var(--shadow);
}

.penumbra-board-item {
  position: absolute;
  display: grid;
  grid-template-rows: auto 1fr;
  border-radius: 18px;
  box-shadow: 0 16px 34px rgba(52, 36, 21, 0.14);
  overflow: hidden;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.penumbra-board-item.is-selected {
  box-shadow: 0 0 0 3px rgba(201, 109, 68, 0.26), 0 20px 38px rgba(52, 36, 21, 0.16);
}

.penumbra-board-item__handle {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  min-height: 42px;
  padding: 10px 12px;
  font-size: 13px;
  color: rgba(37, 29, 25, 0.76);
  cursor: grab;
  user-select: none;
}

.penumbra-board-item__handle small {
  color: rgba(37, 29, 25, 0.52);
}

.penumbra-board-item__body {
  padding: 14px;
  overflow: auto;
}

.penumbra-board-item__resize {
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 18px;
  height: 18px;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background:
    linear-gradient(135deg, transparent 0 48%, rgba(37, 29, 25, 0.48) 48% 58%, transparent 58% 100%),
    linear-gradient(135deg, transparent 0 68%, rgba(37, 29, 25, 0.7) 68% 78%, transparent 78% 100%);
  cursor: nwse-resize;
  opacity: 0.72;
}

.penumbra-board-item__resize:hover {
  opacity: 1;
}

.penumbra-board-item__label {
  margin-bottom: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(37, 29, 25, 0.62);
}

.penumbra-board-item__text {
  min-height: 60px;
  white-space: pre-wrap;
  line-height: 1.45;
  outline: none;
}

.penumbra-board-item__image {
  width: 100%;
  height: calc(100% - 36px);
  object-fit: cover;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.75);
}

.penumbra-board-item__caption {
  padding-top: 10px;
  font-size: 14px;
  color: var(--muted);
}

.penumbra-board-item__file-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.85);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.penumbra-board-item__file-link {
  display: block;
  font-weight: 700;
  text-decoration: none;
  margin-bottom: 10px;
}

.penumbra-board-item--text .penumbra-board-item__body {
  padding-top: 18px;
}

.penumbra-board-item--text .penumbra-board-item__label {
  opacity: 0.6;
}

.tone-sun {
  background: linear-gradient(180deg, #ffeeb0 0%, #f9dd85 100%);
}

.tone-coral {
  background: linear-gradient(180deg, #ffd7c5 0%, #f6b7a0 100%);
}

.tone-mint {
  background: linear-gradient(180deg, #dbf0d0 0%, #b9dfae 100%);
}

.tone-sky {
  background: linear-gradient(180deg, #d8ecff 0%, #b7dcff 100%);
}

.tone-lilac {
  background: linear-gradient(180deg, #e7ddff 0%, #d0c1ff 100%);
}

.tone-paper {
  background: linear-gradient(180deg, #fffefe 0%, #f4eee7 100%);
}

.tone-graphite {
  background: linear-gradient(180deg, #404855 0%, #2e3440 100%);
  color: #fff;
}

.tone-graphite .penumbra-board-item__handle,
.tone-graphite .penumbra-board-item__label,
.tone-graphite .penumbra-board-item__caption,
.tone-graphite .penumbra-board-item__text,
.tone-graphite .penumbra-board-item__file-link {
  color: #fff;
}

.tone-graphite .penumbra-board-item__handle small {
  color: rgba(255, 255, 255, 0.72);
}

.tone-graphite .penumbra-board-item__resize {
  background:
    linear-gradient(135deg, transparent 0 48%, rgba(255, 255, 255, 0.5) 48% 58%, transparent 58% 100%),
    linear-gradient(135deg, transparent 0 68%, rgba(255, 255, 255, 0.85) 68% 78%, transparent 78% 100%);
}

.penumbra-helper {
  display: block;
  margin-top: -4px;
  color: var(--muted);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

@media (max-width: 1280px) {
  .penumbra-project-layout,
  .penumbra-whiteboard__shell,
  .penumbra-grid--two {
    grid-template-columns: 1fr;
  }

  .penumbra-whiteboard__inspector-card {
    position: static;
  }

  .penumbra-whiteboard__viewport {
    min-height: 60vh;
  }
}

@media (max-width: 720px) {
  .penumbra-shell,
  .penumbra-shell--wide {
    width: min(100% - 20px, 100%);
    padding-top: 18px;
  }

  .penumbra-topbar,
  .penumbra-hero,
  .penumbra-whiteboard__toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .penumbra-share__row,
  .penumbra-grid--compact {
    grid-template-columns: 1fr;
  }
}