:root {
  --onyx: #0A0A0A;
  --charcoal: #1A1A1A;
  --red: #E8365D;
  --offwhite: #F5F5F5;
  --midgray: #8A8A8A;
  --border: #333333;
  --card-bg: #1E1E1E;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Poppins', sans-serif;
  background: var(--onyx);
  color: var(--offwhite);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Centered container ── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ── Site header ── */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  background: var(--charcoal);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity 0.15s;
}
.site-brand:hover { opacity: 0.75; }

.site-logo {
  height: 28px;
  width: auto;
  display: block;
}

.brand-studio { color: var(--offwhite); }
.brand-accent  { color: var(--red); }

.site-tagline {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--midgray);
}

/* ── Main content ── */
main.container {
  padding-top: 56px;
  padding-bottom: 80px;
  flex: 1;
}

/* ── Page heading ── */
.page-heading {
  margin-bottom: 48px;
}

h1 {
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 32px;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 10px;
  color: var(--offwhite);
}

.page-rule {
  width: 48px;
  height: 3px;
  background: var(--red);
  margin-bottom: 16px;
}

.page-desc {
  font-size: 14px;
  color: var(--midgray);
  font-weight: 400;
}

/* ── Site footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  background: var(--charcoal);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-brand {
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-decoration: none;
  transition: opacity 0.15s;
}
.footer-brand:hover { opacity: 0.8; }

.footer-link {
  color: var(--offwhite);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s;
}
.footer-link:hover { color: var(--red); }

.footer-copy {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  color: var(--midgray);
  letter-spacing: 0.5px;
}

/* ── Piano keyboard ── */
.piano-svg { display: block; }

.piano-modal-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.piano-note-pill {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: var(--card-bg);
  border: 1px solid var(--red);
  border-radius: 20px;
  padding: 4px 14px;
  color: var(--offwhite);
}

/* ═══════════════════════════════════════════════════════════
   PROGRESSION BUILDER
   ═══════════════════════════════════════════════════════════ */

/* ── Prog controls row ── */
.prog-controls {
  display: flex;
  gap: 24px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.prog-key-scale {
  display: flex;
  gap: 16px;
  align-items: flex-end;
}
.scale-suggestions {
  margin-bottom: 40px;
}
.scale-suggestions-label {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--midgray);
  margin-bottom: 16px;
}
.scale-suggestions-grid {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.scale-suggestion-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}
.scale-suggestion-card:hover {
  border-color: var(--red);
  box-shadow: 0 0 10px rgba(232,54,93,0.25);
  transform: translateY(-2px);
}
.scale-suggestion-card .sugg-roman {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}
.scale-suggestion-card .sugg-name {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--offwhite);
  margin-bottom: 8px;
}
.prog-presets { display: flex; flex-direction: column; gap: 8px; }
.prog-presets > label {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--midgray);
}
.preset-buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.preset-btn {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  background: var(--card-bg);
  color: var(--offwhite);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 14px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.preset-btn:hover { border-color: var(--red); color: var(--red); }

.btn-clear {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: transparent;
  color: var(--midgray);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 18px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.btn-clear:hover { border-color: var(--red); color: var(--red); }

/* ── Progression actions (download etc.) ── */
.progression-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 32px;
}
.btn-download-midi {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: transparent;
  color: var(--red);
  border: 1px solid var(--red);
  border-radius: 8px;
  padding: 10px 20px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.btn-download-midi:hover { background: var(--red); color: #fff; }
.btn-download-midi:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── Progression slots area ── */
.progression-area {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 20px;
  margin-bottom: 48px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.progression-slots {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.progression-empty {
  font-size: 14px;
  color: var(--midgray);
  padding: 48px 0;
  text-align: center;
  width: 100%;
}

/* ── Individual slot card ── */
.prog-slot {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 14px 12px;
  min-width: 130px;
  flex-shrink: 0;
  position: relative;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.prog-slot:hover { border-color: var(--red); }
.prog-slot.editing {
  border-color: var(--red);
  box-shadow: 0 0 0 2px rgba(232,54,93,0.2);
}
.slot-remove {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  color: var(--midgray);
  font-size: 14px;
  cursor: pointer;
  line-height: 1;
  padding: 2px 4px;
  transition: color 0.15s;
}
.slot-remove:hover { color: var(--red); }
.prog-slot-num {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--red);
  margin-bottom: 3px;
}
.prog-slot-name {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--offwhite);
  margin-bottom: 10px;
  padding-right: 20px;
}
.prog-slot-diagram { pointer-events: none; margin-bottom: 10px; }
.prog-slot-actions {
  display: flex;
  gap: 4px;
}
.slot-action-btn {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--midgray);
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  transition: border-color 0.15s, color 0.15s;
}
.slot-action-btn:hover { border-color: var(--red); color: var(--red); }

/* ── Add slot button ── */
.btn-add-slot {
  font-size: 28px;
  font-weight: 300;
  font-family: 'Inter', sans-serif;
  background: var(--card-bg);
  border: 1px dashed var(--border);
  border-radius: 10px;
  color: var(--midgray);
  cursor: pointer;
  padding: 0 24px;
  min-height: 120px;
  min-width: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s;
}
.btn-add-slot:hover { border-color: var(--red); color: var(--red); }

/* ── Chord picker panel ── */
.chord-picker {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 32px 32px;
}
.picker-heading {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--red);
  margin-bottom: 20px;
}
.picker-selects {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.picker-voicings {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  min-height: 40px;
}
.picker-voicing-card {
  background: #252525;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px 12px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s, transform 0.1s;
}
.picker-voicing-card:hover { border-color: var(--red); transform: translateY(-1px); }
.picker-voicing-card.selected { border-color: var(--red); box-shadow: 0 0 0 1px var(--red); }
.picker-voicing-label {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--midgray);
  margin-bottom: 8px;
}
.picker-actions { display: flex; gap: 12px; align-items: center; }
.btn-commit {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: var(--red);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn-commit:hover { opacity: 0.85; }
.btn-cancel-edit {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: none;
  color: var(--midgray);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 20px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  display: none;
}
.btn-cancel-edit:hover { color: var(--offwhite); border-color: var(--offwhite); }

/* ── Instrument toggle ── */
.instr-toggle {
  display: flex;
  gap: 0;
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  width: fit-content;
  margin-bottom: 20px;
}
.instr-btn {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  background: none;
  color: var(--midgray);
  border: none;
  border-radius: 7px;
  padding: 8px 22px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.instr-btn.active {
  background: var(--red);
  color: #fff;
}
.instr-btn:not(.active):hover { color: var(--offwhite); }

/* ── Navigation ── */
.site-nav {
  background: var(--charcoal);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  gap: 0;
}
.nav-link {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--midgray);
  text-decoration: none;
  padding: 14px 20px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  display: inline-block;
}
.nav-link:hover { color: var(--offwhite); }
.nav-link.active { color: var(--offwhite); border-bottom-color: var(--red); }

/* ── Controls ── */
.controls {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.scale-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: flex-end;
  padding-top: 20px;
  margin-bottom: 48px;
  border-top: 1px solid var(--border);
}
.control-group { display: flex; flex-direction: column; gap: 8px; }

label {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--midgray);
}

select {
  font-family: 'Poppins', sans-serif;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 36px 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--charcoal);
  color: var(--offwhite);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath fill='%236B6B6B' d='M0 0l6 8 6-8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  transition: border-color 0.15s;
}
select:focus { outline: none; border-color: var(--red); box-shadow: 0 0 0 2px rgba(232,54,93,0.25); }
select:disabled { opacity: 0.3; cursor: default; }

/* ── Chord finder display ── */
.chord-display { display: flex; gap: 20px; flex-wrap: wrap; }

.chord-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s, box-shadow 0.15s;
}
.chord-card:hover {
  border-color: var(--red);
  box-shadow: 0 4px 24px rgba(232,54,93,0.15);
  transform: translateY(-2px);
}
.chord-card:active { transform: translateY(0); box-shadow: none; }
.chord-card h2 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 4px;
  color: var(--offwhite);
}
.chord-card .subtitle {
  font-size: 10px;
  font-family: 'Inter', sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
  color: var(--midgray);
}

.no-chord { font-size: 14px; color: var(--midgray); }

.chord-svg { display: block; }

/* ── Scale display ── */
#scale-display { display: none; }

.scale-header {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 24px;
  color: var(--red);
}

.scale-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.scale-chord-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 16px 18px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s, box-shadow 0.15s;
}
.scale-chord-card:hover {
  border-color: var(--red);
  box-shadow: 0 4px 24px rgba(232,54,93,0.15);
  transform: translateY(-2px);
}
.scale-chord-card:active { transform: translateY(0); box-shadow: none; }
.scale-chord-roman {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--red);
  margin-bottom: 4px;
}
.scale-chord-name {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--offwhite);
}

/* ── Modal ── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 44px 44px;
  position: relative;
  max-width: 92vw;
  max-height: 90vh;
  overflow: auto;
  box-shadow: 0 24px 80px rgba(0,0,0,0.6);
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 18px;
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1;
  color: var(--midgray);
  transition: color 0.15s;
}
.modal-close:hover { color: var(--offwhite); }

.modal-title {
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 24px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
  color: var(--offwhite);
}
.modal-subtitle {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--midgray);
  margin-bottom: 32px;
}

/* Single-voicing mode (from chord grid) */
#modal-diagram { display: none; }

/* All-variations mode (from scale view) */
#modal-variations { display: none; }
.variations-grid {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.variation-card {
  background: #252525;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px 16px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s, box-shadow 0.15s;
}
.variation-card:hover {
  border-color: var(--red);
  box-shadow: 0 4px 16px rgba(232,54,93,0.15);
  transform: translateY(-1px);
}
.variation-card:active { transform: translateY(0); box-shadow: none; }
.variation-label {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--midgray);
  margin-bottom: 10px;
}

/* Suggestions section */
#modal-suggest-section {
  margin-top: 36px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}
.suggest-label {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
  color: var(--red);
}
.suggest-row { display: flex; gap: 12px; flex-wrap: wrap; }
.suggest-card {
  background: #252525;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px 12px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}
.suggest-card:hover { border-color: var(--red); transform: translateY(-1px); }
.suggest-card:active { transform: translateY(0); }
.suggest-role {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--midgray);
  margin-bottom: 2px;
}
.suggest-name {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--offwhite);
}