@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@600;700;800;900&display=swap');

:root {
  --paper: #f6efe4;
  --paper-2: #fffaf1;
  --ink: #2f2433;
  --muted: #756779;
  --accent: #d86f45;
  --accent-dark: #b55530;
  --accent-soft: #f4d0bc;
  --line: #e4d5c9;
  --green: #3e8f67;
  --green-soft: #d8efe4;
  --red: #b94e4e;
  --red-soft: #f4dddd;
  --shadow: 0 16px 40px rgba(88, 58, 43, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Nunito', sans-serif;
  background:
    radial-gradient(circle at top left, rgba(216, 111, 69, 0.12), transparent 28%),
    linear-gradient(180deg, var(--paper-2), var(--paper));
  color: var(--ink);
}

.editor-shell {
  max-width: 1400px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}

/* Hero */

.hero {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 24px;
}

.back-link {
  color: var(--muted);
  font-weight: 800;
  text-decoration: none;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.eyebrow {
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 0.95;
}

.hero p {
  margin: 0;
  max-width: 760px;
  font-size: 18px;
  line-height: 1.45;
  color: var(--muted);
}

/* Layout */

.editor-layout {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Panels */

.panel {
  background: rgba(255, 250, 241, 0.78);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(228, 213, 201, 0.9);
  border-radius: 28px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.bracket-panel {
  overflow: hidden;
}

.panel-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

details.panel > summary.panel-header {
  cursor: pointer;
  list-style: none;
  user-select: none;
  position: relative;
  padding-right: 32px;
}

details.panel > summary.panel-header::-webkit-details-marker { display: none; }
details.panel > summary.panel-header::marker { content: ''; }

details.panel > summary.panel-header::after {
  content: '›';
  position: absolute;
  right: 0;
  top: 0;
  font-size: 22px;
  font-weight: 900;
  color: var(--muted);
  transition: transform 0.2s ease;
}

details.panel[open] > summary.panel-header::after {
  transform: rotate(90deg);
}

details.panel:not([open]) > summary.panel-header {
  margin-bottom: 0;
}

.panel-header h2 { margin: 0; font-size: 24px; }
.panel-header p  { margin: 0; color: var(--muted); line-height: 1.4; }

/* Fields */

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.field span {
  font-size: 14px;
  font-weight: 900;
  color: var(--muted);
}

.field textarea,
.field input,
.export-box {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px 16px;
  font: inherit;
  color: var(--ink);
  background: #fffdf8;
}

.field textarea {
  resize: vertical;
  min-height: 80px;
}

/* Buttons */

.action-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.primary-btn,
.secondary-btn {
  border: none;
  border-radius: 18px;
  padding: 14px 18px;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease, background 0.15s ease;
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent), #f2a26b);
  color: #fff7f2;
}

.secondary-btn {
  background: #efe3d7;
  color: var(--ink);
}

.primary-btn:disabled,
.secondary-btn:disabled {
  opacity: 0.45;
  cursor: default;
  transform: none;
}

.primary-btn:active:not(:disabled),
.secondary-btn:active:not(:disabled) {
  transform: scale(0.98);
}

/* Status */

.status-box {
  border-radius: 18px;
  padding: 14px 16px;
  background: #fffdf8;
  border: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.4;
}

.status-box.success {
  background: var(--green-soft);
  border-color: rgba(62, 143, 103, 0.24);
  color: #285944;
}

.status-box.error {
  background: var(--red-soft);
  border-color: rgba(185, 78, 78, 0.24);
  color: #6a2d2d;
}

/* Bracket — horizontal (left→right) */

.bracket {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px 0;
}

.bracket-col {
  display: flex;
  flex-direction: column;
  min-width: 200px;
}

.bracket-col-label {
  text-align: center;
  padding: 4px 0 8px;
  font-size: 11px;
  font-weight: 900;
  color: var(--accent-dark);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bracket-col-cells {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.bracket-cell {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: 2px 3px;
  gap: 1px;
}

.bracket-option {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 2px;
  border-radius: 6px;
  border: 1.5px solid transparent;
  cursor: pointer;
  opacity: 0.35;
  transition: opacity 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.bracket-option.selected {
  opacity: 1;
  border-color: var(--accent-soft);
  background: rgba(216, 111, 69, 0.04);
}

.bracket-option:hover:not(.selected) {
  opacity: 0.65;
}

.regen-btn {
  border: none;
  background: none;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  align-self: center;
  opacity: 0.5;
  transition: opacity 0.15s, color 0.15s;
}

.regen-btn:hover:not(:disabled) {
  opacity: 1;
  color: var(--accent);
}

.regen-btn:disabled {
  opacity: 0.2;
  cursor: default;
}

.bracket-input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 6px;
  font: inherit;
  font-size: 11px;
  font-weight: 700;
  color: var(--ink);
  background: #fffdf8;
  text-align: center;
  min-width: 0;
}

.bracket-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.bracket-choice-a { border-top: 2px solid var(--accent); }
.bracket-choice-b { border-bottom: 2px solid var(--green); }

.bracket-ending {
  background: var(--green-soft);
  border-color: rgba(62, 143, 103, 0.24);
  color: #285944;
}

.bracket-ending:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 2px rgba(62, 143, 103, 0.18);
}

.bracket-col[data-level="4"] .bracket-input {
  font-size: 10px;
  padding: 3px 4px;
}

/* Connectors — horizontal forks */

.bracket-connectors {
  display: flex;
  flex-direction: column;
  width: 24px;
  min-width: 24px;
}

.connector-fork {
  flex: 1;
  position: relative;
}

.connector-fork::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 50%;
  height: 0;
  border-top: 1.5px solid var(--line);
}

.connector-fork::after {
  content: '';
  position: absolute;
  top: 25%;
  bottom: 25%;
  left: 50%;
  right: 0;
  border-top: 1.5px solid var(--line);
  border-bottom: 1.5px solid var(--line);
  border-left: 1.5px solid var(--line);
}

/* Export */

.export-box {
  min-height: 280px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  line-height: 1.45;
}

.helper {
  font-size: 13px;
  color: var(--muted);
  padding: 12px 0;
}

/* Responsive */

@media (max-width: 720px) {
  .editor-shell {
    padding: 20px 14px 36px;
  }

  .panel {
    padding: 18px;
    border-radius: 22px;
  }

  .action-row {
    flex-direction: column;
  }
}