/* ========================================
   예각 밴딩 계산기 4.2 — 전용 스타일
   ======================================== */

:root {
  --bg-gradient-1: #1a1a2e;
  --bg-gradient-2: #16213e;
  --bg-gradient-3: #0f3460;
  --glass-bg: rgba(255,255,255,0.08);
  --glass-bg-hover: rgba(255,255,255,0.12);
  --glass-bg-light: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.15);
  --glass-border-hover: rgba(255,255,255,0.2);
  --glass-blur: blur(20px);
  --glass-blur-sm: blur(10px);
  --text-primary: #fff;
  --text-secondary: rgba(255,255,255,0.7);
  --text-muted: rgba(255,255,255,0.4);
  --accent-cyan: rgba(0,212,255,0.9);
  --accent-cyan-light: rgba(0,212,255,0.5);
  --accent-cyan-glow: rgba(0,212,255,0.2);
  --btn-primary-bg: linear-gradient(135deg, rgba(0,212,255,0.4), rgba(0,150,255,0.3));
  --btn-primary-bg-hover: linear-gradient(135deg, rgba(0,212,255,0.6), rgba(0,150,255,0.5));
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-glass: 0 8px 32px rgba(0,0,0,0.3), inset 0 0 0 1px rgba(255,255,255,0.05);
  --shadow-btn-hover: 0 5px 20px rgba(0,0,0,0.2);
}

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

body {
  font-family:'Segoe UI',sans-serif;
  background: linear-gradient(135deg, var(--bg-gradient-1), var(--bg-gradient-2), var(--bg-gradient-3));
  color: var(--text-primary); padding:20px; min-height:100vh;
}

.container {
  max-width:700px; margin:0 auto; padding:20px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md); box-shadow: var(--shadow-glass);
}

h1,h2 { text-align:center; color: var(--text-primary); margin-bottom:15px; }
h1 { font-size:1.8rem; }

label { display:block; font-weight:bold; margin-top:15px; color: var(--text-secondary); font-size:0.85rem; }

input, select {
  width:100%; padding:10px 14px; margin-top:5px; font-size:0.9rem;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  outline:none; transition: all 0.3s ease;
}
input:focus, select:focus {
  background: var(--glass-bg-hover);
  border-color: var(--accent-cyan-light);
  box-shadow: 0 0 20px var(--accent-cyan-glow);
}
input::placeholder { color: var(--text-muted); }
select option { background: #1a1a2e; color: #fff; }

/* ─── 슬라이더 ─── */
input[type=range] { -webkit-appearance:none; background:transparent; padding:0; margin-top:8px; }
input[type=range]::-webkit-slider-track { height:6px; border-radius:3px; background: rgba(255,255,255,0.1); }
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance:none; width:18px; height:18px; border-radius:50%;
  background: var(--accent-cyan); border:2px solid rgba(255,255,255,0.3); margin-top:-6px; cursor:pointer;
}
input[type=range]::-moz-range-track { height:6px; border-radius:3px; background: rgba(255,255,255,0.1); border:none; }
input[type=range]::-moz-range-thumb {
  width:18px; height:18px; border-radius:50%;
  background: var(--accent-cyan); border:2px solid rgba(255,255,255,0.3); cursor:pointer;
}

/* ─── 레이아웃 ─── */
.input-row { display:flex; gap:10px; }
.input-row > div { flex:1; }
.btn-group { display:flex; gap:10px; margin-top:20px; }

button {
  flex:1; padding:10px 16px; font-size:0.9rem; cursor:pointer;
  background: var(--btn-primary-bg); color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.2); border-radius: var(--radius-sm);
  backdrop-filter: var(--glass-blur-sm); transition: all 0.3s ease;
}
button:hover {
  background: var(--btn-primary-bg-hover);
  transform: translateY(-2px); box-shadow: var(--shadow-btn-hover);
}

.result {
  margin-top:20px; padding:15px; border-radius: var(--radius-sm);
  background: var(--glass-bg-light); border: 1px solid var(--glass-border);
  font-size:0.95rem; line-height:1.6; color: var(--text-primary);
}
.formula { margin-top:5px; font-size:0.9rem; color: var(--accent-cyan); font-style:italic; }
small { display:block; margin-top:5px; font-size:0.8rem; color: var(--text-muted); }

/* ─── 캔버스 ─── */
#graphicCanvas { width:100%; height:300px; margin-top:20px; background:#000; position:relative; border-radius: var(--radius-sm); overflow:hidden; }

/* ─── 캔버스 기어 버튼 ─── */
.canvas-gear {
  position:absolute; top:8px; right:8px; z-index:10;
  width:32px; height:32px; border-radius:50%; cursor:pointer;
  background:rgba(0,0,0,0.45); border:1px solid rgba(255,255,255,0.15);
  color:rgba(255,255,255,0.55); display:flex; align-items:center; justify-content:center;
  padding:0; flex:none; backdrop-filter:blur(6px); -webkit-backdrop-filter:blur(6px);
  transition:all 0.25s ease;
}
.canvas-gear:hover {
  background:rgba(0,0,0,0.65); color:rgba(255,255,255,0.9);
  border-color:var(--accent-cyan-light); transform:none; box-shadow:0 0 12px var(--accent-cyan-glow);
}
.canvas-gear .material-icons-round { font-size:18px; }
.canvas-gear.active { background:rgba(0,0,0,0.65); color:rgba(255,255,255,0.9); border-color:var(--accent-cyan-light); }

/* ─── 캔버스 설정 패널 (fixed, draggable) ─── */
#canvasPopover {
  display:none; position:fixed; z-index:100;
  width:220px; border-radius:12px;
  background:rgba(10,14,28,0.95); border:1px solid rgba(255,255,255,0.12);
  backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px);
  box-shadow:0 12px 40px rgba(0,0,0,0.6);
}
#canvasPopover.show { display:block; }
.cp-header {
  display:flex; justify-content:space-between; align-items:center;
  padding:8px 12px; cursor:grab; user-select:none;
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.cp-header:active { cursor:grabbing; }
.cp-header-title { font-size:0.75rem; font-weight:600; color:rgba(255,255,255,0.6); }
.cp-close {
  box-sizing:border-box; width:28px; height:28px; display:inline-grid; place-items:center;
  background:none; border:none; color:rgba(255,255,255,0.4); cursor:pointer;
  font:16px/1 Arial,sans-serif; padding:0; flex:none; text-align:center;
  transition:color 0.2s; transform:none; box-shadow:none;
  -webkit-user-select:none; user-select:none; -webkit-tap-highlight-color:transparent;
}
.cp-close:hover { color:#fff; transform:none; box-shadow:none; }
.cp-body { padding:6px 12px 10px; }
.cp-group-title {
  font-size:0.65rem; color:rgba(0,212,255,0.6); font-weight:600;
  text-transform:uppercase; letter-spacing:0.5px;
  margin:8px 0 4px; padding-top:6px; border-top:1px solid rgba(255,255,255,0.06);
}
.cp-group-title:first-child { margin-top:0; padding-top:0; border-top:none; }
.cp-row {
  display:flex; justify-content:space-between; align-items:center;
  padding:5px 0;
}
.cp-label { font-size:0.75rem; color:rgba(255,255,255,0.7); }
.cp-toggle { position:relative; width:36px; height:20px; flex:none; }
.cp-toggle input { opacity:0; width:0; height:0; position:absolute; }
.cp-toggle-slider {
  position:absolute; inset:0; border-radius:10px; cursor:pointer;
  background:rgba(255,255,255,0.12); transition:background 0.2s;
}
.cp-toggle-slider::before {
  content:''; position:absolute; width:14px; height:14px; border-radius:50%;
  left:3px; top:3px; background:rgba(255,255,255,0.6); transition:transform 0.2s;
}
.cp-toggle input:checked + .cp-toggle-slider { background:rgba(0,212,255,0.45); }
.cp-toggle input:checked + .cp-toggle-slider::before { transform:translateX(16px); background:#fff; }
.cp-range {
  width:100%; -webkit-appearance:none; background:transparent;
  padding:0; margin:4px 0 0; height:16px;
}
.cp-range::-webkit-slider-track { height:4px; border-radius:2px; background:rgba(255,255,255,0.1); }
.cp-range::-webkit-slider-thumb {
  -webkit-appearance:none; width:14px; height:14px; border-radius:50%;
  background:var(--accent-cyan); border:1.5px solid rgba(255,255,255,0.3);
  margin-top:-5px; cursor:pointer;
}
.cp-range::-moz-range-track { height:4px; border-radius:2px; background:rgba(255,255,255,0.1); border:none; }
.cp-range::-moz-range-thumb {
  width:14px; height:14px; border-radius:50%;
  background:var(--accent-cyan); border:1.5px solid rgba(255,255,255,0.3); cursor:pointer;
}
.cp-size-val { font-size:0.7rem; color:var(--accent-cyan); min-width:28px; text-align:right; }

@media(max-width:600px){ .btn-group{flex-direction:column;} }

/* ─── 상단 툴바 ─── */
#top-toolbar {
  display:flex; justify-content:space-between; align-items:center;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  color: #fff; padding:0 16px;
  padding-top: env(safe-area-inset-top, 0px);
  height: calc(36px + env(safe-area-inset-top, 0px));
  margin:-20px -20px 15px -20px; position:relative; z-index:20;
}
@media(min-width:701px) { #top-toolbar { max-width:700px; margin:0 auto 15px auto; border-radius:8px 8px 0 0; } }
#top-toolbar .toolbar-btn {
  flex:none; background:none; border:none; color: rgba(255,255,255,0.8);
  cursor:pointer; padding:4px 10px; display:flex; align-items:center;
  gap:5px; font-size:13px; border-radius:8px;
  transition: background 0.2s, color 0.2s;
  backdrop-filter:none; box-shadow:none; transform:none;
}
#top-toolbar .toolbar-btn:hover {
  background: rgba(255,255,255,0.15); color:#fff;
  transform:none; box-shadow:none;
}
#top-toolbar .toolbar-btn .material-icons-round { font-size:20px; }

/* ─── 타입 카드 그리드 ─── */
#type-selector {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(130px, 160px));
  gap:10px; margin-bottom:14px; justify-content:center;
}
.type-card {
  display:flex; flex-direction:column; align-items:center;
  padding:16px 12px 12px; border-radius:12px;
  background: var(--glass-bg); border:2px solid var(--glass-border);
  cursor:pointer; transition:all 0.25s ease;
  backdrop-filter:none; box-shadow:none; transform:none;
}
.type-card:hover {
  border-color: var(--glass-border-hover); background: var(--glass-bg-hover);
  transform:none; box-shadow:none;
}
.type-card.active {
  border-color: var(--accent-cyan);
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(0,150,255,0.06));
  box-shadow: 0 0 24px rgba(0,212,255,0.12), inset 0 0 0 1px rgba(0,212,255,0.1);
}
.type-card svg, .type-card img { width:90px; height:75px; margin-bottom:8px; object-fit:contain; }
.type-card .type-name {
  font-size:0.78rem; color: var(--text-muted);
  text-align:center; line-height:1.3; transition:color 0.2s;
}
.type-card.active .type-name { color: var(--text-primary); }

/* ─── 멀티라인 토글 ─── */
.multi-toggle {
  display:flex; align-items:center; justify-content:center;
  gap:10px; margin-bottom:12px; font-size:0.8rem; color: var(--text-secondary);
}
.multi-toggle .multi-label { cursor:pointer; transition:color 0.2s; user-select:none; }
.multi-toggle .multi-label:hover { color: var(--text-primary); }
.multi-toggle .multi-label.active-label { color: var(--accent-cyan); font-weight:600; }
.toggle-switch { position:relative; width:44px; height:24px; flex:none; }
.toggle-switch input { opacity:0; width:0; height:0; position:absolute; }
.toggle-slider {
  position:absolute; inset:0; border-radius:12px; cursor:pointer;
  background:rgba(255,255,255,0.1); border:1px solid var(--glass-border);
  transition:all 0.3s;
}
.toggle-slider::before {
  content:''; position:absolute; width:18px; height:18px; border-radius:50%;
  left:2px; top:2px; background:rgba(255,255,255,0.5); transition:all 0.3s;
}
.toggle-switch input:checked + .toggle-slider {
  background:rgba(0,212,255,0.3); border-color: var(--accent-cyan-light);
}
.toggle-switch input:checked + .toggle-slider::before {
  transform:translateX(20px); background: var(--accent-cyan);
}
.multi-line-controls { display:flex; gap:10px; margin-top:10px; align-items:center; }
.multi-line-controls label { display:inline; font-weight:bold; margin-top:0; }
.multi-line-controls input { width:80px; display:inline; margin-top:0; }

/* ─── Settings 모달 ─── */
#settingsModal {
  display:none; position:fixed; top:0; left:0; width:100%; height:100%;
  background:rgba(0,0,0,0.6); z-index:9999; justify-content:center; align-items:center;
}
#settingsModal.show { display:flex; }
#settingsModal .modal-content {
  background: rgba(22,27,44,0.95);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border); border-radius: var(--radius-md);
  padding:20px; max-width:400px; width:90%; max-height:80vh; overflow-y:auto;
  box-shadow: 0 16px 48px rgba(0,0,0,0.4); color: var(--text-primary);
}
#settingsModal .modal-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:15px; }
#settingsModal .modal-header h2 { margin:0; color: var(--text-primary); }
#settingsModal .close-btn {
  box-sizing:border-box; width:32px; height:32px; display:inline-grid; place-items:center;
  background:none; border:none; font:24px/1 Arial,sans-serif; cursor:pointer;
  color: var(--text-muted); flex:none; padding:0; text-align:center; transition: color 0.2s;
}
#settingsModal .close-btn:hover { color: var(--text-primary); transform:none; box-shadow:none; }
#settingsModal .dev-section { margin-top:20px; padding-top:15px; border-top:2px solid #FF6B00; }
#settingsModal .dev-section h3 { color:#FF6B00; margin-bottom:10px; font-size:0.95rem; }
#settingsModal .debug-btn {
  width:100%; padding:10px;
  background: linear-gradient(135deg, rgba(255,107,0,0.5), rgba(255,107,0,0.3));
  color:#fff; border:1px solid rgba(255,107,0,0.4); border-radius:6px;
  cursor:pointer; font-size:0.9rem; transition:all .2s;
}
#settingsModal .debug-btn:hover { background: linear-gradient(135deg, rgba(255,107,0,0.7), rgba(255,107,0,0.5)); transform:none; box-shadow:none; }
.lang-row { display:flex; justify-content:space-between; align-items:center; margin-top:15px; padding-top:15px; border-top:1px solid var(--glass-border); }
.lang-row label { margin:0; font-size:0.9rem; }
.lang-row select { width:auto; min-width:140px; }

/* ─── 셔플 UI ─── */
#shuffleRow { text-align:center; margin-top:10px; }
#shuffleBtn {
  padding:8px 16px; font-size:0.9rem; cursor:pointer;
  background: linear-gradient(135deg, rgba(0,96,96,0.5), rgba(0,96,96,0.3));
  color:#fff; border:1px solid rgba(0,150,150,0.3); border-radius:4px;
}
#shuffleBtn:hover { background: linear-gradient(135deg, rgba(0,96,96,0.7), rgba(0,96,96,0.5)); transform:translateY(-2px); }
#shufflePanel {
  margin-top:10px; padding:12px; border-radius:6px;
  background: var(--glass-bg); border:1px solid var(--glass-border);
}
.shuffle-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:8px; }
.shuffle-title { font-size:0.85rem; font-weight:bold; color: var(--accent-cyan); }
#shufflePanel table { width:100%; border-collapse:collapse; font-size:0.8rem; margin-bottom:8px; }
#shufflePanel th { color: var(--accent-cyan); font-weight:600; text-align:center; padding:4px 6px; border-bottom:1px solid var(--glass-border); }
#shufflePanel td { text-align:center; padding:3px 6px; color: var(--text-secondary); }
.shuffle-controls { display:flex; gap:8px; align-items:center; }
.shuffle-controls label { font-size:0.85rem; font-weight:bold; white-space:nowrap; margin-top:0; }
#shuffleInput { flex:1; font-family:monospace; font-size:1rem; letter-spacing:4px; text-align:center; padding:6px; }
.shuffle-apply { flex:none; padding:6px 14px; font-size:0.85rem; }
.shuffle-reset { flex:none; padding:6px 14px; font-size:0.85rem; background: rgba(255,255,255,0.1); border:1px solid var(--glass-border); }
#shuffleError {
  display:none; margin-top:6px; font-size:0.8rem; padding:4px 8px;
  color:#ff6b6b; background:rgba(255,107,107,0.1); border-radius:4px;
}

/* ─── 나침반 ─── */
#compass-container {
  position:fixed; bottom:60px; right:16px; width:70px; height:70px;
  z-index:1002; background:var(--glass-bg);
  -webkit-backdrop-filter:blur(12px); backdrop-filter:blur(12px);
  border:1px solid var(--glass-border); border-radius:50%;
  box-shadow:0 4px 20px rgba(0,0,0,0.3);
  display:flex; align-items:center; justify-content:center;
  cursor:grab; user-select:none; -webkit-user-select:none;
}
#compass-container:active { cursor:grabbing; }
#compass-ring {
  position:absolute; width:60px; height:60px;
  border:2px solid rgba(255,255,255,0.15); border-radius:50%;
}
#compass-needle {
  position:absolute; width:100%; height:100%;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  transition:transform 0.15s ease-out;
}
#compass-needle .compass-n {
  position:absolute; top:8px; font-size:12px; font-weight:bold;
  color:#ff4444; text-shadow:0 0 4px rgba(255,68,68,0.5);
}
#compass-needle .compass-s {
  position:absolute; bottom:8px; font-size:10px; font-weight:bold;
  color:rgba(255,255,255,0.5);
}
#compass-needle .compass-arrow {
  width:0; height:0; border-left:6px solid transparent; border-right:6px solid transparent;
  border-bottom:20px solid #ff4444; position:absolute; top:18px;
  filter:drop-shadow(0 0 3px rgba(255,68,68,0.6));
}
#compass-needle .compass-arrow::after {
  content:''; position:absolute; top:20px; left:-6px;
  width:0; height:0; border-left:6px solid transparent; border-right:6px solid transparent;
  border-top:20px solid rgba(255,255,255,0.3);
}
#compass-directions {
  position:absolute; width:100%; height:100%;
  font-size:8px; color:rgba(255,255,255,0.5); pointer-events:none;
}
#compass-directions .dir-n { position:absolute; top:-2px; left:50%; transform:translateX(-50%); }
#compass-directions .dir-s { position:absolute; bottom:-2px; left:50%; transform:translateX(-50%); }
#compass-directions .dir-e { position:absolute; right:0px; top:50%; transform:translateY(-50%); }
#compass-directions .dir-w { position:absolute; left:2px; top:50%; transform:translateY(-50%); }