:root {
  --bg: #f3efe3;
  --panel: rgba(255, 251, 245, 0.82);
  --panel-strong: #fffaf0;
  --line: rgba(18, 46, 58, 0.16);
  --text: #19323b;
  --muted: #5f706e;
  --accent: #c76632;
  --accent-dark: #8f431b;
  --shadow: 0 18px 40px rgba(21, 50, 63, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(199, 102, 50, 0.18), transparent 28%),
    radial-gradient(circle at right 20%, rgba(21, 50, 63, 0.18), transparent 24%),
    linear-gradient(180deg, #efe5d2 0%, var(--bg) 44%, #e6efe9 100%);
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.hero,
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

.hero {
  padding: 32px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-dark);
  font-size: 0.78rem;
}

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

h1,
h2 {
  font-weight: 600;
}

h1 {
  max-width: 12ch;
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  line-height: 0.94;
  margin-bottom: 18px;
}

.intro {
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.06rem;
}

.status-card {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 18px 20px;
  margin-top: 24px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.visualizer-wrap {
  margin-top: 20px;
  padding: 12px;
  border-radius: 18px;
  background: rgba(16, 38, 47, 0.9);
  overflow: hidden;
}

.spectrum {
  width: 100%;
  height: 180px;
  display: block;
  border-radius: 12px;
}

.status-label,
.status-value {
  margin: 0;
}

.status-label {
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.status-value {
  font-size: 1.4rem;
}

.primary-button,
.secondary-button,
.file-button span {
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent) 0%, #df8b3d 100%);
  color: #fff8f1;
  padding: 14px 22px;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease;
  box-shadow: 0 10px 22px rgba(199, 102, 50, 0.24);
}

.primary-button:hover,
.primary-button:focus-visible,
.secondary-button:hover,
.secondary-button:focus-visible,
.file-button span:hover,
.file-button span:focus-visible {
  transform: translateY(-1px);
}

.secondary-button,
.file-button span {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 50px;
}

.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 24px;
}

.panel {
  padding: 24px;
}

.panel-header {
  margin-bottom: 20px;
}

.panel-header p {
  color: var(--muted);
  margin-bottom: 0;
}

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

.storage-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-top: 16px;
}

.preset-manager {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.preset-manager:empty {
  display: none;
}

.managed-preset {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 253, 250, 0.7);
}

.managed-preset strong {
  display: block;
}

.managed-preset button {
  min-width: 86px;
}

.storage-actions input[type="text"] {
  min-width: 0;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fffdfa;
}

.file-button {
  position: relative;
  overflow: hidden;
}

.file-button input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.preset-card {
  text-align: left;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  border-radius: 18px;
  padding: 16px;
  cursor: pointer;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.preset-card strong,
.preset-card span {
  display: block;
}

.preset-card span {
  color: var(--muted);
  margin-top: 6px;
  line-height: 1.35;
}

.preset-card.active,
.preset-card:hover,
.preset-card:focus-visible {
  border-color: rgba(199, 102, 50, 0.6);
  transform: translateY(-1px);
  background: #fff5e8;
}

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

.layer-toolbar {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.layer-list {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.layer-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 253, 250, 0.78);
  cursor: pointer;
}

.layer-select {
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.layer-card.active {
  border-color: rgba(199, 102, 50, 0.6);
  background: #fff5e8;
}

.layer-card strong,
.layer-card span {
  display: block;
}

.layer-actions {
  display: flex;
  gap: 8px;
}

.layer-chip {
  min-width: 62px;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fffdfa;
  color: var(--text);
  cursor: pointer;
}

.layer-chip.active {
  background: linear-gradient(135deg, var(--accent) 0%, #df8b3d 100%);
  color: #fff8f1;
  border-color: transparent;
}

.layer-chip.muted {
  background: #ebe4da;
  color: var(--muted);
}

.layer-card span {
  color: var(--muted);
  font-size: 0.92rem;
}

.control-form label {
  display: grid;
  gap: 8px;
}

.control-form span {
  font-size: 0.95rem;
}

.control-form select,
.control-form input[type="range"] {
  width: 100%;
}

.control-form select {
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fffdfa;
}

.range-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
}

output {
  min-width: 76px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--accent-dark);
}

.advice-panel {
  margin-top: 24px;
}

.lower-grid {
  margin-top: 24px;
}

.timer-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.timer-row select {
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fffdfa;
}

.timer-status,
.session-status {
  margin: 14px 0 0;
  color: var(--muted);
}

.advice-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

@media (max-width: 860px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .status-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .storage-actions {
    grid-template-columns: 1fr;
  }

  .managed-preset {
    grid-template-columns: 1fr;
  }

  .layer-toolbar {
    grid-template-columns: 1fr;
  }

  .layer-card {
    grid-template-columns: 1fr;
  }

  .layer-actions {
    width: 100%;
  }

  .primary-button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}