@import url('https://fonts.googleapis.com/css2?family=Noto+Music&display=swap');

:root {
  --page-width: 794px;  /* A4 پیش‌فرض */
  --page-height: 1123px;
  --page-width-mm: 210mm;
  --page-height-mm: 297mm;
  --page-line-color: #000;
  --page-bg: #fff;
  --canvas-gap: 32px;
  --canvas-gap-mm: 8.47mm;
  --page-frame-padding: 18px;
  --line-gap: 10px;
  --line-count: 5;
  --line-thickness: 1px;
  --zoom: 1;
}

body.composer-shell {
  --paper: #16181f;
  --ink: #e5e7eb;
  --muted: rgba(255, 255, 255, 0.12);
  --iconStrong: #f3f4f6;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --panel: color-mix(in oklab, var(--paper) 90%, var(--ink) 10%);
  --canvas-bg: #2d2f33;
  margin: 0;
  min-height: 100vh;
  background: var(--canvas-bg);
  color: #e5e7eb;
  font-family: 'Noto Music', 'Vazirmatn', system-ui, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0 24px 72px;
  box-sizing: border-box;
  font-size: 15px;
  overflow-x: hidden;
  direction: ltr;
  text-align: left;
}

html.composer-page,
html.composer-page body {
  overflow-y: auto !important;
  height: auto !important;
}

body.composer-shell[data-palette="amber"] {
  --accent: #fbbf24;
  --accent-strong: #f59e0b;
}

body.composer-shell[data-palette="violet"] {
  --accent: #a78bfa;
  --accent-strong: #8b5cf6;
}

body.composer-shell[data-theme="light"] {
  --paper: #ffffff;
  --ink: #1f2937;
  --muted: rgba(0, 0, 0, 0.12);
  --iconStrong: #0b1220;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  --panel: color-mix(in oklab, var(--paper) 94%, var(--ink) 6%);
  --canvas-bg: #f4f6fb;
  color: #111827;
}

.composer-topbar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  margin-left: 0;
  background: var(--panel);
  color: var(--ink);
  border-bottom: 1px solid var(--muted);
  box-shadow: var(--shadow);
  z-index: 10;
}

.composer-topbar .brand {
  color: var(--ink);
}

.composer-topbar .icon-btn {
  background: color-mix(in oklab, var(--paper) 85%, var(--ink) 15%);
  color: var(--ink);
  border-color: var(--muted);
}

.composer-topbar .icon-btn:hover,
.composer-topbar .icon-btn:focus-visible {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.composer-topbar .menu-pop {
  background: var(--panel);
  color: var(--ink);
  border-color: var(--muted);
  box-shadow: var(--shadow);
  left: auto;
  right: auto;
  transform: none;
}

.composer-topbar .save-menu__add,
.composer-topbar .chip {
  color: var(--ink);
  border-color: var(--muted);
}

.composer-topbar .chip.is-active,
.composer-topbar .chip:focus-visible,
.composer-topbar .chip:hover {
  color: var(--paper);
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.composer-frame {
  width: 100%;
  max-width: 1440px;
  margin: 24px auto 0;
  padding: 18px 18px 32px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.composer-header {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: color-mix(in oklab, var(--panel) 92%, transparent 8%);
  border: 1px solid var(--muted);
  border-radius: 12px;
  padding: 0;
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
  color: var(--ink);
  position: relative;
  overflow: hidden;
  transition: padding 200ms ease, max-height 260ms ease, background 180ms ease, border-color 180ms ease;
}

.composer-header__body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
  padding: 14px 18px 16px;
  transition: max-height 260ms ease, opacity 240ms ease;
}

.composer-header__content {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 1600px;
  overflow: hidden;
  transition: opacity 220ms ease, max-height 260ms ease;
}

.composer-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  padding-left: 110px;
  position: relative;
  border-bottom: 1px solid color-mix(in oklab, var(--muted) 85%, var(--accent) 15%);
  background: linear-gradient(180deg, color-mix(in oklab, var(--panel) 90%, transparent 10%), color-mix(in oklab, var(--panel) 96%, transparent 4%));
  border-radius: 12px 12px 0 0;
}

.composer-header__bar::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
  pointer-events: none;
}

.composer-header__toggle {
  position: absolute;
  left: 10px;
  right: auto;
  inset-block-start: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 42px;
  padding: 0;
  margin: 0;
  border: 1px solid color-mix(in oklab, var(--muted) 65%, var(--accent) 35%);
  background: color-mix(in oklab, var(--panel) 85%, transparent 15%);
  color: var(--ink);
  border-radius: 12px;
  z-index: 5;
  transition: color 200ms ease, transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease, background 200ms ease;
}

.composer-header__toggle.scorebox__toggle {
  left: 10px;
  bottom: auto;
  transform: none;
}

.composer-header__toggle .toggle-icon {
  pointer-events: none;
  transform: rotate(0deg);
  transform-origin: center;
  transition: transform 220ms ease, color 200ms ease;
}

.toggle-icon__chevron {
  transform-origin: center;
  transition: transform 220ms ease;
}

.composer-header__toggle:hover,
.composer-header__toggle:focus-visible {
  color: var(--accent);
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--accent) 55%, transparent 45%);
  border-color: color-mix(in oklab, var(--accent) 65%, var(--muted) 35%);
}

.composer-header.is-collapsed {
  padding: 0;
  gap: 0;
  max-height: 160px;
}

.composer-header.is-collapsed .composer-header__body {
  opacity: 0;
  max-height: 0;
  padding: 0 18px;
  pointer-events: none;
}

.composer-header:not(.is-collapsed) .composer-header__toggle .toggle-icon {
  transform: rotate(0deg);
}

.composer-header.is-collapsed .composer-header__toggle .toggle-icon {
  transform: rotate(180deg);
}

.composer-header.is-collapsed .composer-header__bar {
  border-radius: 12px;
  border-bottom: none;
}

.composer-shell[data-lang="en"] .composer-header__content,
.composer-shell[data-lang="en"] .header-panels,
.composer-shell[data-lang="en"] .header-panel,
.composer-shell[data-lang="en"] .control,
.composer-shell[data-lang="en"] .page-panel-grid {
  direction: ltr;
  text-align: left;
}

.header-title {
  font-weight: 700;
  letter-spacing: -0.3px;
}

.header-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: 10px;
  width: 100%;
  align-items: end;
}

.composer-header__bar .header-tabs {
  flex: 1 1 auto;
}

.header-tab {
  border: 1px solid var(--muted);
  background: color-mix(in oklab, var(--panel) 80%, transparent);
  color: var(--ink);
  padding: 12px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
}

.header-tab.is-active,
.header-tab:focus-visible,
.header-tab:hover {
  border-color: var(--accent);
  color: var(--ink);
  background: color-mix(in oklab, var(--accent) 18%, var(--panel) 82%);
}

.header-tab.is-active::before,
.header-tab:focus-visible::before,
.header-tab:hover::before {
  background: color-mix(in oklab, var(--accent) 76%, var(--panel) 24%);
}

.header-panels {
  width: 100%;
}

.header-panel {
  display: none;
  overflow-x: auto;
}

.header-panel.is-active {
  display: block;
}

.header-placeholder {
  padding: 10px 12px 6px;
  border: 1px dashed color-mix(in oklab, var(--muted) 80%, var(--accent) 20%);
  border-radius: 12px;
  color: color-mix(in oklab, var(--ink) 90%, var(--accent) 10%);
  background: color-mix(in oklab, var(--panel) 78%, transparent 22%);
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--accent) 6%, transparent 94%);
}

.placeholder-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.chip.ghost {
  background: transparent;
  border-color: color-mix(in oklab, var(--muted) 70%, var(--accent) 30%);
  color: color-mix(in oklab, var(--ink) 80%, var(--accent) 20%);
  box-shadow: inset 0 0 10px rgba(125, 211, 252, 0.15);
}

.page-panel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 10px 14px;
  align-items: start;
  min-width: 720px;
}

.page-panel-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-panel-col__body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-panel-col__footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding-top: 4px;
}

.page-panel-col__divider {
  width: 100%;
  height: 2px;
  background: color-mix(in oklab, var(--muted) 78%, var(--accent) 22%);
  border-radius: 999px;
}

.page-panel-col__label {
  font-size: 12px;
  font-weight: 700;
  color: color-mix(in oklab, var(--ink) 85%, var(--accent) 15%);
  letter-spacing: -0.2px;
}

.page-panel-col--page {
  min-width: 180px;
}

.page-panel-col--metrics {
  min-width: 190px;
}

.page-panel-col--lines {
  min-width: 180px;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 14px;
  color: var(--ink);
  min-height: 100%;
}

.control select,
.control input[type="range"] {
  background: color-mix(in oklab, var(--panel) 80%, transparent);
  border: 1px solid var(--muted);
  color: var(--ink);
  padding: 7px 9px;
  border-radius: 10px;
  min-width: 150px;
}

.zoom-control {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control__field-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control__field-row input[type="range"] {
  flex: 1 1 auto;
}

.control input[type="number"] {
  min-width: 90px;
  background: color-mix(in oklab, var(--panel) 80%, transparent);
  border: 1px solid var(--muted);
  color: var(--ink);
  padding: 7px 9px;
  border-radius: 10px;
}

.zoom-control input[type="range"] {
  min-width: 180px;
}

.zoom-value {
  font-weight: 600;
  min-width: 44px;
  text-align: center;
}

.range-value {
  font-weight: 600;
  min-width: 54px;
  text-align: right;
}

.control--lines {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  min-height: 100%;
}

.line-buttons {
  display: inline-flex;
  gap: 6px;
}

.line-buttons button {
  border: 1px solid var(--muted);
  background: color-mix(in oklab, var(--panel) 80%, transparent);
  color: var(--ink);
  padding: 7px 9px;
  border-radius: 10px;
  cursor: pointer;
  min-width: 42px;
  min-height: 34px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.line-buttons button.is-active,
.line-buttons button:hover {
  background: #e5e7eb;
  color: #0b0c10;
  border-color: #e5e7eb;
}

.line-buttons--cta {
  flex-wrap: wrap;
}

.cta-btn {
  background: color-mix(in oklab, var(--accent) 35%, var(--panel) 65%);
  color: var(--ink);
  border: 1px solid var(--accent);
  font-weight: 700;
  min-height: 42px;
}

.cta-btn:hover,
.cta-btn:focus-visible {
  color: var(--paper);
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.save-item__actions button {
  background: transparent;
  border: 1px solid var(--muted);
  border-radius: 8px;
  color: var(--ink);
  padding: 4px 8px;
}

.save-menu__empty {
  color: var(--ink);
  opacity: 0.8;
}

.composer-main {
  margin-top: 18px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1 1 auto;
}

.page-toolbar {
  width: 100%;
  max-width: 1400px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  margin-bottom: 8px;
  background: color-mix(in oklab, var(--panel) 92%, transparent 8%);
  border: 1px solid var(--muted);
  border-radius: 12px;
  box-sizing: border-box;
}

.page-toolbar__label {
  font-weight: 700;
  color: var(--ink);
  min-width: 72px;
}

.page-toolbar__track {
  display: inline-flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px;
  border-radius: 10px;
  border: 1px solid var(--muted);
  background: color-mix(in oklab, var(--panel) 80%, transparent);
  scrollbar-width: thin;
  width: 100%;
}

.page-toolbar__track button {
  min-width: 48px;
  min-height: 42px;
  border-radius: 10px;
  border: 1px solid var(--muted);
  background: color-mix(in oklab, var(--paper) 75%, var(--ink) 25%);
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.page-toolbar__track button.is-active,
.page-toolbar__track button:hover,
.page-toolbar__track button:focus-visible {
  background: var(--accent);
  color: var(--paper);
  border-color: var(--accent);
}

.page-viewport {
  background: var(--canvas-bg);
  position: relative;
  padding: 10px 0 24px;
  overflow-y: auto;
  overflow-x: hidden;
  max-width: 100%;
  flex: 1 1 auto;
  max-height: calc(100vh - 220px);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  cursor: grab;
  touch-action: none;
}

.page-viewport.is-panning {
  cursor: grabbing;
}

.page-scale {
  transform-origin: top left;
  transform: scale(var(--zoom));
  display: flex;
  justify-content: center;
  align-items: flex-start;
  width: 100%;
}

.page-stage {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  width: 100%;
  gap: 32px;
  position: relative;
}

.page-shell {
  display: none;
  align-items: center;
  justify-content: center;
  width: calc(var(--page-width) + var(--page-frame-padding) * 2);
  height: calc(var(--page-height) + var(--page-frame-padding) * 2);
  padding: var(--page-frame-padding);
  border: 1.6px solid color-mix(in oklab, var(--accent) 80%, transparent 20%);
  border-radius: 18px;
  box-shadow:
    0 0 22px rgba(125, 211, 252, 0.18),
    0 0 42px rgba(125, 211, 252, 0.08);
  background: color-mix(in oklab, var(--panel) 75%, transparent 25%);
  box-sizing: border-box;
}

.page-shell.is-active {
  display: flex;
}

.page-surface {
  position: relative;
  width: var(--page-width);
  height: var(--page-height);
  background: var(--page-bg);
  border: 0;
  box-shadow: none;
  margin-top: 0;
  box-sizing: border-box;
  padding: var(--canvas-gap);
  flex: 0 0 auto;
  display: block;
}

.page-surface.is-active {
  display: block;
}

.staff-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-top: var(--staff-top-blank, 0px);
  padding-bottom: var(--staff-bottom-blank, 0px);
  box-sizing: border-box;
}

.staff-row {
  display: flex;
  align-items: center;
  position: relative;
}

.staff-body {
  position: relative;
  display: flex;
  align-items: center;
  padding: 8px 0;
  min-height: 90px;
  background: transparent;
  overflow: hidden;
  border: 0;
  border-radius: 0;
}

.staff-svg {
  width: 100%;
  height: calc((var(--line-count) - 1) * var(--line-gap) + 24px);
  display: block;
  overflow: visible;
}

.composer-footer {
  position: fixed;
  bottom: 12px;
  left: 16px;
  color: rgba(255,255,255,0.6);
  font-size: 12px;
}

@media (max-width: 800px) {
  body.composer-shell {
    padding: 16px 14px 64px;
  }

  .composer-topbar {
    position: sticky;
    width: 100%;
    padding-inline: 8px;
  }

  .header-tabs {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 6px;
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: minmax(160px, 1fr);
  }

  .header-controls {
    grid-template-columns: 1fr;
  }

  .control,
  .zoom-control,
  .control__field-row {
    width: 100%;
  }

  .zoom-control input[type="range"],
  .control input[type="range"],
  .control select,
  .control input[type="number"] {
    min-width: 0;
    width: 100%;
  }

  .line-buttons {
    flex-wrap: wrap;
  }

  .page-viewport {
    max-height: none;
    height: calc(100vh - 240px);
  }

  .page-stage {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  body.composer-shell {
    padding: 12px 10px 56px;
  }

  .header-tab {
    padding: 10px 12px;
  }

  .composer-header__bar {
    padding: 10px 12px;
  }

  .composer-header__body {
    padding: 12px 14px 14px;
  }

  .line-buttons button,
  .cta-btn {
    width: 100%;
  }

  .control--lines .line-buttons,
  .control--actions .line-buttons {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }

  .page-viewport {
    height: calc(100vh - 220px);
  }
}

@media (max-width: 500px) {
  .composer-header__bar {
    padding: 9px 10px;
  }

  .composer-header__body {
    padding: 10px 12px 12px;
    gap: 10px;
  }

  .composer-header__content {
    gap: 10px;
  }

  .page-panel-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .zoom-control,
  .control__field-row {
    flex-direction: column;
    align-items: stretch;
  }

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

  .control--lines {
    flex-direction: column;
    align-items: stretch;
  }

  .line-buttons {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  }
}

@media print {
  body.composer-shell {
    background: #fff;
    color: #000;
    padding: 0;
    margin: 0;
  }

  .composer-topbar,
  .composer-header,
  .composer-footer,
  .page-toolbar {
    display: none !important;
  }

  .page-viewport {
    max-height: none;
    overflow: visible;
    padding: 0;
  }

  .page-scale {
    transform: none !important;
    width: auto;
  }

  .page-stage {
    gap: 0;
  }

  .page-surface {
    display: block !important;
    width: var(--page-width-mm);
    height: var(--page-height-mm);
    padding: var(--canvas-gap-mm);
    margin: 0 auto;
    box-shadow: none;
  }
}