:root {
  color-scheme: dark;
  --bg: #121212;
  --panel: rgba(30, 30, 30, 0.9);
  --panel-2: rgba(34, 34, 34, 0.88);
  --panel-3: rgba(40, 40, 40, 0.92);
  --text: #f2f2f2;
  --muted: #a0a0a0;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.18);
  --input-bg: rgba(255, 255, 255, 0.05);
  --button-bg: rgba(255, 255, 255, 0.05);
  --button-hover: rgba(255, 255, 255, 0.09);
  --primary-bg: rgba(255, 255, 255, 0.12);
  --overlay: rgba(23, 23, 23, 0.72);
  --radius: 10px;
  --transition: 220ms ease;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #ececec;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-2: rgba(255, 255, 255, 0.76);
  --panel-3: rgba(255, 255, 255, 0.92);
  --text: #161616;
  --muted: #666666;
  --line: rgba(0, 0, 0, 0.1);
  --line-strong: rgba(0, 0, 0, 0.16);
  --input-bg: rgba(255, 255, 255, 0.8);
  --button-bg: rgba(255, 255, 255, 0.42);
  --button-hover: rgba(255, 255, 255, 0.62);
  --primary-bg: rgba(255, 255, 255, 0.72);
  --overlay: rgba(255, 255, 255, 0.74);
}

* {
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: rgba(127, 127, 127, 0.45) transparent;
}

*::-webkit-scrollbar {
  width: 8px;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  background: rgba(127, 127, 127, 0.45);
  border-radius: 999px;
}

html {
  font-size: 13px;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
  font-family: "JetBrains Mono", monospace, system-ui;
  color: var(--text);
  background: var(--bg);
  transition: background-color var(--transition), color var(--transition);
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

p,
h1,
h2 {
  margin: 0;
}

.app-shell {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 1rem;
  min-height: 100vh;
  height: 100vh;
  padding: 1rem;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 0;
  height: calc(100vh - 2rem);
}

.intro-panel,
.stash-panel {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  transition: background-color var(--transition), border-color var(--transition);
}

.intro-panel {
  padding: 1rem;
}

.stash-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 0;
  flex: 1 1 auto;
  padding: 1rem;
  overflow: hidden;
}

.panel-header {
  display: grid;
  gap: 0.6rem;
  padding: 0.2rem 0.1rem;
}

.panel-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.eyebrow,
.toolbar-label,
.input-label,
.saved-color-rgb,
.preview-rgb,
.panel-copy,
.status-message,
.preview-swatch-label {
  color: var(--muted);
}

.eyebrow,
.toolbar-label,
.input-label,
.preview-swatch-label {
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.panel-header h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  line-height: 0.94;
}

.panel-copy {
  max-width: 26ch;
  line-height: 1.5;
}

.stash-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--overlay);
  transition: background-color var(--transition), border-color var(--transition);
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.toolbar-value {
  margin-top: 0.3rem;
  color: var(--text);
  font-size: 1rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 32px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--button-bg);
  transition: background-color var(--transition), border-color var(--transition),
    transform var(--transition);
}

.theme-toggle:hover {
  border-color: var(--line-strong);
}

.theme-toggle-track {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 999px;
}

.theme-toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: var(--panel-3);
  border: 1px solid var(--line);
  transition: transform var(--transition), background-color var(--transition),
    color var(--transition), border-color var(--transition);
}

.theme-toggle-icon {
  font-size: 0.82rem;
  line-height: 1;
  color: var(--text);
}

:root[data-theme="dark"] .theme-toggle-knob {
  transform: translateX(0);
}

:root[data-theme="light"] .theme-toggle-knob {
  transform: translateX(24px);
}

.saved-colors {
  display: grid;
  gap: 0.7rem;
  align-content: start;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding-right: 0.1rem;
}

.empty-state {
  padding: 0.95rem;
  border-radius: var(--radius);
  background: var(--overlay);
  border: 1px dashed var(--line-strong);
  line-height: 1.55;
}

.saved-color-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--overlay);
  transition: transform var(--transition), border-color var(--transition),
    background-color var(--transition);
}

.saved-color-swatch {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  transition: transform var(--transition), border-color var(--transition);
}

.saved-color-meta {
  min-width: 0;
}

.saved-color-hex {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.saved-color-rgb {
  margin-top: 0.24rem;
  font-size: 0.8rem;
}

.saved-color-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.card-button,
.primary-button,
.secondary-button,
.ghost-button {
  min-height: 40px;
  padding: 0.72rem 0.95rem;
  border-radius: var(--radius);
  transition: transform var(--transition), background-color var(--transition),
    border-color var(--transition), color var(--transition);
}

.card-button,
.secondary-button,
.ghost-button {
  color: var(--text);
  background: var(--button-bg);
  border: 1px solid var(--line);
}

.primary-button {
  color: var(--text);
  background: var(--primary-bg);
  border: 1px solid var(--line);
}

.card-button:hover,
.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover {
  background: var(--button-hover);
}

.secondary-button:hover,
.ghost-button:hover,
.card-button:hover,
.primary-button:hover {
  background: var(--button-hover);
  border-color: var(--line-strong);
}

.preview-panel {
  position: relative;
  min-height: calc(100vh - 2rem);
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: #446ccf;
  transition: background-color var(--transition), border-color var(--transition);
}

.preview-backdrop {
  display: none;
}

.preview-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 2rem);
  padding: 1rem;
}

.preview-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.preview-swatch {
  position: relative;
  width: min(100%, 560px);
  min-height: 600px;
  padding: 1rem;
  border-radius: var(--radius);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 220ms ease;
}

.preview-swatch-meta {
  width: 100%;
  max-width: 520px;
  display: grid;
  gap: 0.85rem;
  padding: 1rem;
  border-radius: var(--radius);
  background: var(--overlay);
  border: 1px solid var(--line);
  transition: background-color var(--transition), border-color var(--transition);
}

.preview-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.preview-heading {
  display: grid;
  gap: 0.24rem;
}

.preview-heading h2 {
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 0.9;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.preview-rgb {
  font-size: 0.9rem;
}

.input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius);
  background: var(--input-bg);
  border: 1px solid var(--line);
  transition: background-color var(--transition), border-color var(--transition);
}

.input-prefix {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--muted);
}

#colorInput {
  flex: 1;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: clamp(1.3rem, 3vw, 2rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#colorInput:focus {
  outline: none;
}

#colorInput::placeholder {
  color: var(--muted);
  opacity: 0.6;
}

.color-picker-shell {
  flex: 0 0 auto;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--line);
  overflow: hidden;
  cursor: pointer;
  background: var(--button-bg);
}

.color-picker-input {
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.color-picker-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker-input::-webkit-color-swatch {
  border: 0;
  border-radius: 999px;
}

.color-picker-input::-moz-color-swatch {
  border: 0;
  border-radius: 999px;
}

.status-message {
  min-height: 1.2rem;
}

.status-message.error {
  color: #d36262;
}

.status-message.success {
  color: #4f8c66;
}

.action-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}


.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.75rem;
  letter-spacing: 0.04em;
}


.icon-button i {
  font-size: 0.95rem;
  font-weight: 900;
}

.button-icon {
  margin-right: 0.5rem;
  font-size: 0.95rem;
  font-weight: 900;
}

@media (max-width: 1100px) {
  body {
    overflow: auto;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .preview-panel,
  .preview-content {
    min-height: 72vh;
  }
}

@media (max-width: 720px) {
  .app-shell {
    display: flex;
    flex-direction: column;
    height: auto;
    min-height: 100vh;
    padding: 0.8rem;
    gap: 0.8rem;
  }

  .preview-panel {
    order: 2;
    min-height: auto;
  }

  .preview-content {
    min-height: auto;
    padding: 0.85rem;
  }

  .preview-swatch {
    min-height: 520px;
    padding: 0.85rem;
  }

  .preview-swatch-meta {
    padding: 0.9rem;
  }

  .preview-topline {
    align-items: flex-start;
    flex-direction: column;
  }

  .sidebar {
    display: contents;
  }

  .intro-panel {
    order: 1;
  }

  .stash-panel {
    order: 3;
    flex: 0 0 auto;
    overflow: visible;
  }

  .stash-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .toolbar-actions {
    width: 100%;
    flex-direction: column;
  }

  .toolbar-actions .ghost-button {
    width: 100%;
  }

  .saved-colors {
    flex: 0 0 auto;
    overflow: visible;
    min-height: auto;
    padding-right: 0;
  }

  .saved-color-card {
    grid-template-columns: auto 1fr;
  }

  .saved-color-actions {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .action-row {
    grid-template-columns: 1fr;
  }
}