/* 같이그림 — 도구는 조용하게, 색은 캔버스에만.
   그림 도구의 UI가 화려하면 사용자가 고른 색이 안 보인다.
   그래서 크롬은 차가운 석회색 계열로 눌러두고, 강조는 감청(prussian) 하나만 쓴다. */

:root {
  /* light */
  --paper:      #FFFFFF;
  --desk:       #E4E6EA;
  --panel:      #F6F7F9;
  --panel-sunk: #ECEEF2;
  --line:       #D2D6DE;
  --line-soft:  #E2E5EB;
  --text:       #171A21;
  --text-dim:   #656C7B;
  --text-faint: #8D95A3;
  --accent:     #1F4479;
  --accent-ink: #FFFFFF;
  --accent-wash:#DDE5F1;
  --good:       #1F7A5A;
  --warn:       #A8681A;
  --bad:        #A83A2E;
  --shadow-lift: 0 1px 2px rgba(17, 22, 33, .07), 0 8px 24px rgba(17, 22, 33, .09);
  --shadow-canvas: 0 2px 4px rgba(17, 22, 33, .10), 0 18px 48px rgba(17, 22, 33, .14);

  --rail: 60px;
  --topbar: 52px;
  --statusbar: 30px;
  --panel-w: 244px;

  --sans: "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI",
          "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Consolas",
          "D2Coding", monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper:      #FFFFFF;
    --desk:       #101216;
    --panel:      #1B1E25;
    --panel-sunk: #15181E;
    --line:       #2B303A;
    --line-soft:  #232830;
    --text:       #E6E9EF;
    --text-dim:   #98A0AE;
    --text-faint: #6D7583;
    --accent:     #7BA6E3;
    --accent-ink: #0E1420;
    --accent-wash:#233149;
    --good:       #59C79C;
    --warn:       #D8A44A;
    --bad:        #E0705F;
    --shadow-lift: 0 1px 2px rgba(0, 0, 0, .5), 0 8px 24px rgba(0, 0, 0, .45);
    --shadow-canvas: 0 2px 6px rgba(0, 0, 0, .55), 0 20px 60px rgba(0, 0, 0, .6);
  }
}

:root[data-theme="dark"] {
  --paper:      #FFFFFF;
  --desk:       #101216;
  --panel:      #1B1E25;
  --panel-sunk: #15181E;
  --line:       #2B303A;
  --line-soft:  #232830;
  --text:       #E6E9EF;
  --text-dim:   #98A0AE;
  --text-faint: #6D7583;
  --accent:     #7BA6E3;
  --accent-ink: #0E1420;
  --accent-wash:#233149;
  --good:       #59C79C;
  --warn:       #D8A44A;
  --bad:        #E0705F;
  --shadow-lift: 0 1px 2px rgba(0, 0, 0, .5), 0 8px 24px rgba(0, 0, 0, .45);
  --shadow-canvas: 0 2px 6px rgba(0, 0, 0, .55), 0 20px 60px rgba(0, 0, 0, .6);
}

* { box-sizing: border-box; }

/* .group·.gate 가 display 를 다시 켜버리므로 [hidden] 을 못 이긴다. 여기서 못 박는다. */
[hidden] { display: none !important; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--desk);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

button, input, select { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

.eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* ─────────────────────────  랜딩  ───────────────────────── */

.landing {
  min-height: 100%;
  display: grid;
  grid-template-rows: 1fr auto;
}

.landing-inner {
  width: min(880px, 100% - 48px);
  margin: 0 auto;
  padding: clamp(48px, 12vh, 120px) 0 48px;
  display: grid;
  gap: 40px;
  align-content: center;
}

.wordmark {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.wordmark h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 52px);
  font-weight: 800;
  letter-spacing: -.035em;
  text-wrap: balance;
}

.wordmark .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateY(-.35em);
}

.lede {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--text-dim);
  text-wrap: pretty;
}

.start-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
  display: grid;
  gap: 14px;
  align-content: start;
  box-shadow: var(--shadow-lift);
}

.card h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 13px;
}

.field {
  display: grid;
  gap: 6px;
}

.field input {
  background: var(--panel-sunk);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 9px 11px;
  width: 100%;
}

.field input::placeholder { color: var(--text-faint); }

.btn {
  border: 1px solid var(--line);
  background: var(--panel-sunk);
  border-radius: 7px;
  padding: 9px 14px;
  font-weight: 600;
  cursor: pointer;
  /* 색은 테마 토큰에서 오므로 전환을 걸지 않는다.
     테마가 바뀔 때 전환 중인 속성이 옛 색으로 굳는 일이 있다. */
  transition: transform .08s ease;
}

.btn:hover { border-color: var(--accent); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.btn-primary:hover { filter: brightness(1.08); }

.join-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: end;
}

.notes {
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--line-soft);
  padding-top: 20px;
  color: var(--text-dim);
  font-size: 13px;
}

.notes b { color: var(--text); font-weight: 650; }

.landing-foot {
  padding: 18px 24px;
  border-top: 1px solid var(--line-soft);
  color: var(--text-faint);
  font-size: 12px;
}

/* ─────────────────────────  보드  ───────────────────────── */

.app {
  height: 100%;
  display: grid;
  grid-template-columns: var(--rail) 1fr var(--panel-w);
  grid-template-rows: var(--topbar) 1fr var(--statusbar);
  grid-template-areas:
    "top  top   top"
    "rail stage side"
    "stat stat  stat";
}

/* 상단 바 */
.topbar {
  grid-area: top;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.topbar .brand {
  display: flex;
  align-items: center;
  gap: 7px;
  font-weight: 800;
  letter-spacing: -.02em;
  text-decoration: none;
  color: inherit;
}

.topbar .brand .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
}

.roomchip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--panel-sunk);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 4px 6px 4px 10px;
}

.roomchip .code {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .02em;
}

.spacer { flex: 1; }

.peers {
  display: flex;
  align-items: center;
}

.peer-dot {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  border: 2px solid var(--panel);
  margin-left: -6px;
  cursor: default;
}

.peer-dot:first-child { margin-left: 0; }

.peer-count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-left: 8px;
}

/* 좌측 도구 레일 */
.rail {
  grid-area: rail;
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 0;
  overflow-y: auto;
}

.rail hr {
  width: 26px;
  border: 0;
  border-top: 1px solid var(--line);
  margin: 6px 0;
}

.tool {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  position: relative;
}

.tool:hover { background: var(--panel-sunk); color: var(--text); }

.tool[aria-pressed="true"] {
  background: var(--accent-wash);
  border-color: var(--accent);
  color: var(--accent);
}

.tool svg { width: 20px; height: 20px; }

.tool[data-key]::after {
  content: attr(data-key);
  position: absolute;
  right: 3px;
  bottom: 1px;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--text-faint);
}

.tool:disabled { opacity: .38; cursor: not-allowed; }

/* 캔버스 무대 */
.stage {
  grid-area: stage;
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  background:
    radial-gradient(120% 120% at 50% 0%, color-mix(in srgb, var(--desk) 88%, var(--text) 4%), var(--desk));
  padding: 20px;
}

.board {
  position: relative;
  box-shadow: var(--shadow-canvas);
  border-radius: 2px;
  background: var(--paper);
  touch-action: none;
}

.board canvas {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 2px;
}

#main { position: relative; }
#live { pointer-events: none; }

.cursors {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.cursor {
  position: absolute;
  transform: translate(-2px, -2px);
  transition: transform .06s linear;
  will-change: transform;
}

.cursor .nib {
  width: 12px;
  height: 12px;
  border-radius: 50% 50% 50% 1px;
  border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .4);
}

.cursor .tag {
  position: absolute;
  top: 13px;
  left: 8px;
  white-space: nowrap;
  font-size: 11px;
  font-weight: 650;
  color: #fff;
  padding: 1px 6px;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
}

/* 우측 패널 */
.side {
  grid-area: side;
  background: var(--panel);
  border-left: 1px solid var(--line);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 16px 14px 22px;
}

.group { display: grid; gap: 10px; }

.group-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.readout {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
}

.swatches {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.swatch {
  aspect-ratio: 1;
  border-radius: 5px;
  border: 1px solid rgba(0, 0, 0, .16);
  cursor: pointer;
  padding: 0;
  position: relative;
}

.swatch[aria-pressed="true"]::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 2px solid var(--accent);
  border-radius: 7px;
}

.color-row {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 8px;
  align-items: center;
}

.color-row input[type="color"] {
  width: 40px;
  height: 34px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-sunk);
  cursor: pointer;
}

.hexfield {
  font-family: var(--mono);
  text-transform: lowercase;
  background: var(--panel-sunk);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 9px;
  width: 100%;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  background: transparent;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: var(--line);
}

input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: var(--line);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--panel);
  margin-top: -5.5px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .3);
}

input[type="range"]::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--panel);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .3);
}

.preview {
  height: 54px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.btn-wide { grid-column: 1 / -1; }

.btn-ghost {
  background: transparent;
}

.btn-danger:hover {
  border-color: var(--bad);
  color: var(--bad);
}

.peer-list {
  display: grid;
  gap: 6px;
}

.peer-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.peer-row .bead {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.peer-row .who {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.peer-row .tagme {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-faint);
}

/* 상태 바 */
.statusbar {
  grid-area: stat;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 14px;
  background: var(--panel);
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-dim);
  overflow: hidden;
  white-space: nowrap;
}

.conn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.conn .bead {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-faint);
}

.conn[data-state="live"] .bead { background: var(--good); }
.conn[data-state="retry"] .bead { background: var(--warn); }
.conn[data-state="down"]  .bead { background: var(--bad); }

/* 토스트 */
.toasts {
  position: fixed;
  left: 50%;
  bottom: calc(var(--statusbar) + 16px);
  transform: translateX(-50%);
  display: grid;
  gap: 8px;
  justify-items: center;
  z-index: 50;
  pointer-events: none;
}

.toast {
  background: var(--text);
  color: var(--panel);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow-lift);
  animation: toast-in .18s ease both;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

/* 이름 물어보는 첫 화면 */
.gate {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--desk) 82%, transparent);
  backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  z-index: 60;
  padding: 24px;
}

.gate .card { width: min(360px, 100%); }

.gate[hidden] { display: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* 좁은 화면: 우측 패널을 접고 레일만 남긴다 */
@media (max-width: 860px) {
  .app {
    grid-template-columns: var(--rail) 1fr;
    grid-template-areas:
      "top  top"
      "rail stage"
      "stat stat";
  }
  .side {
    position: fixed;
    top: var(--topbar);
    right: 0;
    bottom: var(--statusbar);
    width: var(--panel-w);
    z-index: 40;
    box-shadow: var(--shadow-lift);
    transform: translateX(100%);
    transition: transform .18s ease;
  }
  .side.open { transform: none; }
}

@media (min-width: 861px) {
  #panelToggle { display: none; }
}