/* ============================================================
   OpticScan — Design System
   Dark mode | Glassmorphism | Mobile-first
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

/* ── CSS Variables ────────────────────────────────────────── */
:root {
  --bg-base:       #0a0c12;
  --bg-surface:    #10131d;
  --bg-panel:      rgba(255,255,255,0.04);
  --bg-panel-hov:  rgba(255,255,255,0.07);
  --border:        rgba(255,255,255,0.08);
  --border-accent: rgba(99,179,237,0.4);

  --accent-cyan:   #4fc3f7;
  --accent-blue:   #3b82f6;
  --accent-green:  #34d399;
  --accent-orange: #fb923c;
  --accent-red:    #f87171;
  --accent-purple: #a78bfa;

  --text-primary:  #f0f4ff;
  --text-secondary:#8b9cb8;
  --text-muted:    #475569;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  --shadow-glass: 0 8px 32px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
  --shadow-glow:  0 0 24px rgba(79,195,247,0.15);

  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
  --font-ui:   'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ── Reset ────────────────────────────────────────────────── */
*,*::before,*::after { box-sizing: border-box; margin:0; padding:0; }
html { font-size:16px; scroll-behavior:smooth; }
body {
  font-family: var(--font-ui);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}
button { font-family: inherit; cursor: pointer; border: none; outline: none; }
input, select { font-family: inherit; outline: none; }
a { color: var(--accent-cyan); text-decoration: none; }

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius:99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Background mesh ──────────────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 10%, rgba(59,130,246,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 90%, rgba(79,195,247,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 40% 50% at 50% 50%, rgba(167,139,250,0.04) 0%, transparent 70%);
  pointer-events: none;
}

/* ── License Screen ───────────────────────────────────────── */
#license-screen {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg-base);
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 2rem; padding: 2rem;
  animation: fadeIn 0.4s ease;
}
#license-screen.hidden { display: none; }
.license-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  padding: 3rem 2.5rem;
  max-width: 440px; width: 100%;
  box-shadow: var(--shadow-glass);
  text-align: center;
}
.license-card .logo-mark {
  width: 72px; height: 72px; margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  box-shadow: 0 0 40px rgba(79,195,247,0.3);
}
.license-card h1 {
  font-size: 1.6rem; font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}
.license-card .subtitle {
  color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 2rem;
}
.license-input-wrap {
  position: relative; margin-bottom: 1rem;
}
.license-input-wrap input {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.1rem;
  color: var(--text-primary);
  font-family: var(--font-mono); font-size: 0.95rem;
  letter-spacing: 0.05em;
  transition: border var(--transition), box-shadow var(--transition);
}
.license-input-wrap input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(79,195,247,0.15);
}
.license-input-wrap input::placeholder { color: var(--text-muted); }
.license-error {
  color: var(--accent-red); font-size: 0.82rem; margin-bottom: 0.75rem;
  min-height: 1.2em;
}

/* ── Main App Layout ──────────────────────────────────────── */
#app {
  position: relative; z-index: 1;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
  transition: opacity 0.3s;
}
#app.locked { pointer-events: none; filter: blur(8px); opacity: 0.3; }

/* ── Header ───────────────────────────────────────────────── */
.app-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(10,12,18,0.8);
  backdrop-filter: blur(16px);
  display: flex; align-items: center; gap: 1rem;
  position: sticky; top: 0; z-index: 100;
}
.app-header .brand {
  display: flex; align-items: center; gap: 0.6rem;
}
.brand-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.brand-name {
  font-size: 1.2rem; font-weight: 700; letter-spacing: -0.02em;
}
.brand-name span { color: var(--accent-cyan); }
.header-spacer { flex: 1; }
.header-badge {
  background: rgba(79,195,247,0.1);
  border: 1px solid rgba(79,195,247,0.25);
  color: var(--accent-cyan);
  padding: 0.3rem 0.75rem;
  border-radius: 99px;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.04em;
}

/* ── Workspace ────────────────────────────────────────────── */
.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr auto;
  gap: 1rem;
  padding: 1rem;
  height: calc(100vh - 65px);
}
@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    height: auto;
    min-height: calc(100vh - 65px);
  }
}

/* ── Panel Base ───────────────────────────────────────────── */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(12px);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.panel-header {
  padding: 0.85rem 1.2rem;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 0.6rem;
  flex-shrink: 0;
}
.panel-title {
  font-size: 0.82rem; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-secondary);
}
.panel-badge {
  margin-left: auto;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.04em;
}
.badge-live { background: rgba(52,211,153,0.15); color: var(--accent-green); }
.badge-ready { background: rgba(79,195,247,0.12); color: var(--accent-cyan); }
.badge-idle { background: rgba(255,255,255,0.06); color: var(--text-muted); }

.panel-body {
  flex: 1; position: relative; min-height: 260px;
  display: flex; align-items: center; justify-content: center;
}

/* ── Camera Panel ─────────────────────────────────────────── */
#camera-panel { grid-column: 1; grid-row: 1; }
#camera-panel .panel-body { background: #000; border-radius: 0 0 var(--radius-lg) var(--radius-lg); }

#video-el, #capture-canvas {
  width: 100%; height: 100%;
  object-fit: cover;
  position: absolute; inset: 0;
}
#capture-canvas { display:none; }

.camera-overlay {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(135deg, transparent 60%, rgba(79,195,247,0.04));
}
.corner-mark {
  position: absolute; width: 24px; height: 24px;
  border-color: var(--accent-cyan);
  border-style: solid;
  opacity: 0.7;
}
.corner-mark.tl { top:12px; left:12px; border-width:2px 0 0 2px; }
.corner-mark.tr { top:12px; right:12px; border-width:2px 2px 0 0; }
.corner-mark.bl { bottom:12px; left:12px; border-width:0 0 2px 2px; }
.corner-mark.br { bottom:12px; right:12px; border-width:0 2px 2px 0; }

.camera-placeholder {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 0.75rem;
  color: var(--text-muted); text-align:center; padding:1rem;
}
.camera-placeholder .icon { font-size: 3rem; opacity: 0.5; }
.camera-placeholder p { font-size: 0.85rem; max-width:220px; }

/* ── Shape Panel ──────────────────────────────────────────── */
#shape-panel { grid-column: 2; grid-row: 1; }
@media (max-width:900px) { #shape-panel { grid-column:1; } }

#shape-canvas {
  max-width:100%; max-height:100%;
  display: block; margin: auto;
}
.shape-placeholder {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 0.75rem;
  color: var(--text-muted); text-align:center; padding:1rem;
  height:100%;
}
.shape-placeholder .icon { font-size:3rem; opacity:0.4; }
.shape-placeholder p { font-size:0.85rem; max-width:200px; }

/* ── Controls Panel ───────────────────────────────────────── */
#controls-panel {
  grid-column: 1 / -1;
  grid-row: 2;
  flex-direction: row; align-items: stretch;
  gap: 0;
  min-height:0;
}
@media (max-width:900px) {
  #controls-panel { flex-direction:column; }
}

.controls-section {
  flex: 1; padding: 1rem 1.2rem;
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 0.6rem;
}
.controls-section:last-child { border-right: none; }
@media (max-width:900px) {
  .controls-section { border-right:none; border-bottom:1px solid var(--border); }
  .controls-section:last-child { border-bottom:none; }
}
.section-label {
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 0.2rem;
}

/* Step indicators */
.step-row {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
}
.step-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--border); transition: background 0.3s;
}
.step-dot.done { background: var(--accent-green); }
.step-dot.active { background: var(--accent-cyan); box-shadow: 0 0 6px var(--accent-cyan); }

/* Measurement readout */
.measurement {
  font-family: var(--font-mono); font-size:0.82rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  display: flex; justify-content: space-between;
}
.measurement .val { color: var(--accent-cyan); font-weight: 600; }
.measurement.success .val { color: var(--accent-green); }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem; font-weight: 600;
  transition: all var(--transition);
  position: relative; overflow: hidden;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.btn::after {
  content:''; position:absolute; inset:0;
  background: rgba(255,255,255,0); transition: background 0.2s;
}
.btn:hover::after { background: rgba(255,255,255,0.06); }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity:0.35; pointer-events:none; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #fff; box-shadow: 0 4px 16px rgba(79,195,247,0.25);
}
.btn-primary:hover { box-shadow: 0 6px 24px rgba(79,195,247,0.4); }

.btn-secondary {
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn-secondary:hover { border-color: rgba(255,255,255,0.18); }

.btn-success {
  background: linear-gradient(135deg, #059669, #34d399);
  color: #fff; box-shadow: 0 4px 16px rgba(52,211,153,0.2);
}
.btn-success:hover { box-shadow: 0 6px 24px rgba(52,211,153,0.35); }

.btn-danger {
  background: rgba(248,113,113,0.12);
  border: 1px solid rgba(248,113,113,0.25);
  color: var(--accent-red);
}
.btn-danger:hover { background: rgba(248,113,113,0.2); }

.btn-icon {
  width: 38px; height:38px; padding:0;
  border-radius: var(--radius-sm);
  font-size: 1rem;
}
.btn-sm { padding: 0.45rem 0.9rem; font-size:0.8rem; }
.btn-lg { padding: 0.85rem 1.6rem; font-size:0.95rem; border-radius:var(--radius-lg); }
.btn-full { width:100%; }

/* ── Scale Control ────────────────────────────────────────── */
.scale-wrap {
  display: flex; align-items: center; gap: 0.6rem;
}
.scale-input {
  flex:1;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem;
  color: var(--text-primary);
  font-family: var(--font-mono); font-size:0.9rem;
  transition: border var(--transition);
  -moz-appearance: textfield;
}
.scale-input::-webkit-inner-spin-button,
.scale-input::-webkit-outer-spin-button { display:none; }
.scale-input:focus { border-color: var(--accent-cyan); }
.scale-unit {
  color: var(--text-muted); font-size:0.85rem; flex-shrink:0;
}
input[type=range].scale-slider {
  width:100%; accent-color: var(--accent-cyan);
  height:4px; cursor:pointer;
}

/* ── Progress Bar ─────────────────────────────────────────── */
.progress-bar-wrap {
  height: 3px; background: var(--border);
  border-radius:99px; overflow:hidden;
}
.progress-bar-fill {
  height:100%; border-radius:99px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
  transition: width 0.4s ease;
  width: 0%;
}

/* ── Status Message ───────────────────────────────────────── */
.status-msg {
  font-size: 0.8rem; color: var(--text-secondary);
  display: flex; align-items: center; gap: 0.4rem;
  min-height: 1.4em;
}
.status-msg.ok { color: var(--accent-green); }
.status-msg.warn { color: var(--accent-orange); }
.status-msg.err { color: var(--accent-red); }
.status-dot {
  width:6px; height:6px; border-radius:50%; flex-shrink:0;
  background: currentColor;
}
.pulse { animation: pulse 1.4s ease infinite; }
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:0.35} }

/* ── Tabs (for guide modal) ───────────────────────────────── */
.tab-row {
  display: flex; border-bottom: 1px solid var(--border);
  padding: 0 1.2rem;
}
.tab-btn {
  padding: 0.7rem 1rem; font-size:0.82rem; font-weight:600;
  color: var(--text-muted); background:none; border:none;
  border-bottom: 2px solid transparent; margin-bottom:-1px;
  cursor:pointer; transition: all var(--transition);
}
.tab-btn.active { color:var(--accent-cyan); border-bottom-color:var(--accent-cyan); }
.tab-pane { display:none; padding:1.25rem; }
.tab-pane.active { display:block; }

/* ── Modal ────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset:0; z-index:500;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(8px);
  display:flex; align-items:center; justify-content:center;
  padding:1rem;
  opacity:0; pointer-events:none;
  transition: opacity 0.25s;
}
.modal-backdrop.open { opacity:1; pointer-events:all; }
.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  max-width: 640px; width:100%;
  max-height:88vh; overflow-y:auto;
  box-shadow: var(--shadow-glass);
  transform: scale(0.95); transition: transform 0.25s;
}
.modal-backdrop.open .modal { transform: scale(1); }
.modal-head {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display:flex; align-items:center; gap:0.75rem;
}
.modal-head h2 { font-size:1.1rem; font-weight:700; flex:1; }
.modal-close {
  width:32px; height:32px; border-radius:99px;
  background:rgba(255,255,255,0.06); border:1px solid var(--border);
  color:var(--text-secondary); font-size:1.1rem; display:flex;
  align-items:center;justify-content:center; cursor:pointer;
  transition:all var(--transition);
}
.modal-close:hover { background:rgba(255,255,255,0.12); color:var(--text-primary); }

/* ── Guide Cards ──────────────────────────────────────────── */
.guide-card {
  display:flex; gap:1rem; align-items:flex-start;
  padding:1rem;
  background:var(--bg-panel);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  margin-bottom:0.75rem;
}
.guide-card .g-icon {
  font-size:2rem; flex-shrink:0;
  width:48px; height:48px;
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,0.04); border-radius:12px;
}
.guide-card h4 { font-size:0.88rem; font-weight:600; margin-bottom:0.25rem; }
.guide-card p { font-size:0.8rem; color:var(--text-secondary); line-height:1.6; }
.guide-tip {
  background: rgba(79,195,247,0.08);
  border: 1px solid rgba(79,195,247,0.2);
  border-radius:var(--radius-md); padding:0.85rem 1rem;
  font-size:0.82rem; color:var(--text-secondary); line-height:1.6;
  margin-top:0.5rem;
}
.guide-tip strong { color:var(--accent-cyan); }

/* ── Scan overlay lines (canvas drawn externally) ─────────── */
#overlay-canvas {
  position:absolute; inset:0; pointer-events:none;
  width:100%; height:100%;
}

/* ── Animations ───────────────────────────────────────────── */
@keyframes fadeIn { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:none} }
@keyframes scanLine {
  0%{transform:translateY(-100%)} 100%{transform:translateY(100%)}
}
.scan-anim {
  position:absolute; left:0; right:0; height:2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  animation: scanLine 1.8s ease-in-out infinite;
  opacity:0.7;
}

/* ── Toast ────────────────────────────────────────────────── */
#toast-area {
  position:fixed; bottom:1.5rem; right:1.5rem; z-index:9998;
  display:flex; flex-direction:column; gap:0.5rem; align-items:flex-end;
}
.toast {
  background:var(--bg-surface); border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:0.75rem 1.1rem; font-size:0.82rem;
  box-shadow: var(--shadow-glass); max-width:320px;
  animation: fadeIn 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
  display:flex; align-items:center; gap:0.5rem;
}
.toast.ok  { border-color:rgba(52,211,153,0.3); }
.toast.err { border-color:rgba(248,113,113,0.3); }
.toast.warn{ border-color:rgba(251,146,60,0.3); }
@keyframes fadeOut { to{opacity:0;transform:translateX(16px)} }

/* ── DevTools blocker overlay ─────────────────────────────── */
#devtools-block {
  display:none; position:fixed; inset:0; z-index:99999;
  background: var(--bg-base);
  align-items:center; justify-content:center; flex-direction:column;
  gap:1rem; text-align:center; padding:2rem;
}
#devtools-block.active { display:flex; }
#devtools-block .big-icon { font-size:4rem; }
#devtools-block h2 { font-size:1.4rem; font-weight:700; }
#devtools-block p { color:var(--text-secondary); max-width:300px; }