/* ================================================================
   MokyaLora Digital Twin — Device Frame & UI CSS
   Rev A PCB aesthetic: FR4 green soldermask + ILI9341 landscape
   320×240 landscape display · 6×6 GPIO keyboard matrix
   ================================================================ */

:root {
  /* Meshtastic green-tech palette */
  --mk-green:        #30D158;
  --mk-green-dim:    #1A7A36;
  --mk-green-muted:  #0D3A1C;
  --mk-green-glow:   rgba(48, 209, 88, 0.15);
  --mk-bg:           #050A05;
  --mk-surface:      #1C1C1E;
  --mk-surface2:     #2C2C2E;
  --mk-surface3:     #3A3A3C;
  --mk-border:       #38383A;
  --mk-text:         #EBEBF5;
  --mk-text-dim:     #8E8E93;
  --mk-text-muted:   #48484A;
  --mk-accent:       #00FF88;
  --mk-danger:       #FF453A;
  --mk-warning:      #FFD60A;
  --mk-info:         #64D2FF;
  --mk-lora:         #BF5AF2;
  /* PCB-specific */
  --pcb-bg:          #0A1C0A;
  --pcb-bg2:         #0E2410;
  --pcb-border:      #1A4A1A;
  --pcb-trace:       #1E3A1E;
  --pcb-key-bg:      #0E2010;
  --pcb-key-border:  #1E3A1E;
  --pcb-screen-rim:  #C8A020;
  --pcb-screen-glow: rgba(200,160,32,0.22);
  /* Device dimensions (landscape) */
  --dev-w:           354px;
  --screen-w:        320px;
  --screen-h:        240px;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  background: var(--mk-bg);
  color: var(--mk-text);
  font-family: system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ── Scaler wrapper ─────────────────────────────────────────── */
.device-frame-scaler {
  display: flex;
  justify-content: center;
  transform-origin: top center;
  width: 100%;
}

/* ── Outer Device Body — PCB FR4 green soldermask ───────────── */
.device-frame {
  width: var(--dev-w);
  flex-shrink: 0;
  /* FR4 soldermask: dark PCB green with subtle copper-trace texture */
  background:
    repeating-linear-gradient(
      -50deg,
      transparent 0px, transparent 10px,
      rgba(20,60,20,0.08) 10px, rgba(20,60,20,0.08) 11px
    ),
    repeating-linear-gradient(
      40deg,
      transparent 0px, transparent 14px,
      rgba(10,40,10,0.06) 14px, rgba(10,40,10,0.06) 15px
    ),
    linear-gradient(165deg, #0E2410 0%, #0A1C0A 35%, #0C2010 65%, #091808 100%);
  border-radius: 20px;
  border: 1.5px solid var(--pcb-border);
  box-shadow:
    0 0 0 1px #040804,
    0 4px 12px rgba(0,0,0,0.98),
    0 16px 48px rgba(0,0,0,0.88),
    0 40px 100px rgba(0,0,0,0.65),
    inset 0 1px 0 rgba(48,209,88,0.05),
    inset 0 -1px 0 rgba(0,0,0,0.8),
    /* PCB ambient glow */
    0 0 80px rgba(10,50,10,0.25);
  padding: 10px 10px 14px;
  position: relative;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* Left-side antenna stub (SMA connector simulation) */
.device-frame::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 14px;
  width: 12px;
  height: 72px;
  background: linear-gradient(to right, #081408, #1A3A1A, #0E2410);
  border-radius: 6px 0 0 6px;
  border: 1.5px solid var(--pcb-border);
  border-right: none;
  box-shadow:
    -3px 0 10px rgba(0,0,0,0.7),
    inset -1px 0 4px rgba(0,0,0,0.5);
}

/* ── PCB silkscreen label ────────────────────────────────────── */
.pcb-label {
  font-size: 7px;
  color: #2A5A2A;
  letter-spacing: 0.8px;
  font-family: 'Courier New', monospace;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 6px;
  opacity: 0.8;
}

/* ── Screen Bezel — PCB silkscreen yellow border ─────────────── */
.screen-bezel {
  background: #000;
  border-radius: 5px;
  padding: 2px;
  margin-bottom: 8px;
  border: 2.5px solid var(--pcb-screen-rim);
  box-shadow:
    0 0 14px var(--pcb-screen-glow),
    0 0 28px rgba(200,160,32,0.06),
    inset 0 2px 8px rgba(0,0,0,0.98);
  position: relative;
}

/* Scanline overlay — subtle CRT/TFT authenticity */
.screen-bezel::before {
  content: '';
  position: absolute;
  inset: 2px;
  border-radius: 3px;
  background: repeating-linear-gradient(
    0deg,
    transparent 0px,
    transparent 1px,
    rgba(0,0,0,0.025) 1px,
    rgba(0,0,0,0.025) 2px
  );
  pointer-events: none;
  z-index: 2;
}

/* Glare reflection */
.screen-bezel::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 5px;
  background: linear-gradient(
    135deg,
    rgba(255,255,255,0.02) 0%,
    transparent 45%
  );
  pointer-events: none;
  z-index: 3;
}

/* Canvas — 320×240 landscape (matches ILI9341 hardware) */
#screen-canvas {
  display: block;
  width: var(--screen-w);
  height: var(--screen-h);
  border-radius: 3px;
  position: relative;
  z-index: 1;
}

/* ── Keyboard Section ─────────────────────────────────────────── */
.keyboard-section {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

/* ── Navigation Area — D-pad centered in 5-col grid ─────────── */
/*
  Visual layout (5 col × 3 row):
    [FUNC] [    ] [ ▲ ] [SET ] [VOL+]
    [    ] [ ◄  ] [ OK] [ ► ] [    ]
    [BACK] [    ] [ ▼ ] [DEL ] [VOL-]
*/
.kbd-nav-area {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(3, 44px);
  grid-template-areas:
    ".      nfunc  nup    nset   nvolup"
    ".      nleft  nok    nright ."
    ".      nback  ndown  ndel   nvoldn";
  gap: 3px;
}

/* Grid area placements for nav keys */
.kbd-nav-area .key-btn[data-fn="FUNC"]  { grid-area: nfunc; }
.kbd-nav-area .key-btn[data-fn="UP"]    { grid-area: nup; }
.kbd-nav-area .key-btn[data-fn="SET"]   { grid-area: nset; }
.kbd-nav-area .key-btn[data-fn="VOLUP"] { grid-area: nvolup; }
.kbd-nav-area .key-btn[data-fn="LEFT"]  { grid-area: nleft; }
.kbd-nav-area .key-btn[data-fn="OK"]    { grid-area: nok; }
.kbd-nav-area .key-btn[data-fn="RIGHT"] { grid-area: nright; }
.kbd-nav-area .key-btn[data-fn="BACK"]  { grid-area: nback; }
.kbd-nav-area .key-btn[data-fn="DOWN"]  { grid-area: ndown; }
.kbd-nav-area .key-btn[data-fn="DEL"]   { grid-area: ndel; }
.kbd-nav-area .key-btn[data-fn="VOLDN"] { grid-area: nvoldn; }

/* ── Core Input Area — 5×5 + function row ────────────────────── */
.kbd-core-area {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 3px;
}

/* ── Key Buttons ─────────────────────────────────────────────── */
.key-btn {
  height: 44px;
  min-width: 0;
  border-radius: 5px;
  border: 1px solid var(--pcb-key-border);
  background: linear-gradient(180deg, #142814 0%, #0C1C0C 100%);
  color: #C0DCC0;
  font-size: 7.5px;
  line-height: 1.1;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  padding: 2px 1px;
  position: relative;
  transition: background 0.07s ease, box-shadow 0.07s ease, transform 0.05s ease, color 0.07s ease;
  box-shadow:
    0 2px 0 #040804,
    inset 0 1px 0 rgba(48,209,88,0.04);
  overflow: hidden;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.key-btn:hover {
  background: linear-gradient(180deg, #1C3A1C 0%, #142814 100%);
  border-color: #2A5A2A;
  color: #D8F0D8;
}

/* Press state — simulates physical key travel + PCB green glow */
.key-btn:active,
.key-btn.pressed {
  transform: translateY(1px);
  box-shadow: 0 1px 0 #040804;
  background: linear-gradient(180deg, #0E2E1C 0%, #091A10 100%);
  border-color: var(--mk-green);
  color: var(--mk-green);
}

/* ── Key Label Elements ───────────────────────────────────────── */

/* Top line: QWERTY/numeric letters */
.key-qwerty {
  font-size: 9px;
  color: #A0D0A0;
  text-align: center;
  letter-spacing: 0.08em;
  font-family: 'Courier New', monospace;
  white-space: nowrap;
  line-height: 1;
}

/* Main label: Zhuyin phonemes or function name */
.key-primary {
  font-size: 12px;
  font-weight: 600;
  color: inherit;
  text-align: center;
  letter-spacing: 0.02em;
  font-family: 'Noto Sans TC', 'PingFang TC', '微軟正黑體', system-ui, sans-serif;
  white-space: nowrap;
  line-height: 1.1;
}

/* Third char (multi-char Zhuyin) */
.key-secondary {
  font-size: 7px;
  color: #6A9A6A;
  text-align: center;
  letter-spacing: 0.03em;
  font-family: 'Noto Sans TC', system-ui, sans-serif;
  line-height: 1;
}

/* Bottom line: calculator-mode label (teal) */
.key-calc {
  font-size: 6px;
  color: #2AB8B8;
  text-align: center;
  letter-spacing: 0.05em;
  font-family: 'Courier New', monospace;
  white-space: nowrap;
  line-height: 1;
}

.key-btn.pressed .key-qwerty    { color: var(--mk-green-dim); }
.key-btn.pressed .key-secondary { color: var(--mk-green-dim); }
.key-btn.pressed .key-calc      { color: #40D8D8; }

/* Ripple effect on press */
.key-btn::after {
  content: '';
  position: absolute;
  inset: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(48, 209, 88, 0.28);
  pointer-events: none;
  transition: none;
}

.key-btn.ripple::after {
  inset: auto;
  width: 56px;
  height: 56px;
  transform: translate(-50%, -50%);
  left: 50%;
  top: 50%;
  animation: key-ripple 0.35s ease-out forwards;
}

@keyframes key-ripple {
  from { transform: translate(-50%, -50%) scale(0); opacity: 0.55; }
  to   { transform: translate(-50%, -50%) scale(2.2); opacity: 0; }
}

/* ── Key Variant Styles ───────────────────────────────────────── */

/* D-pad directional keys — indigo/blue tint */
.key-btn[data-fn="UP"],
.key-btn[data-fn="DOWN"],
.key-btn[data-fn="LEFT"],
.key-btn[data-fn="RIGHT"] {
  background: linear-gradient(180deg, #141828 0%, #0C1018 100%);
  border-color: #1E2840;
  color: #4860A8;
  font-size: 12px;
}
.key-btn[data-fn="UP"]:active,    .key-btn[data-fn="UP"].pressed,
.key-btn[data-fn="DOWN"]:active,  .key-btn[data-fn="DOWN"].pressed,
.key-btn[data-fn="LEFT"]:active,  .key-btn[data-fn="LEFT"].pressed,
.key-btn[data-fn="RIGHT"]:active, .key-btn[data-fn="RIGHT"].pressed {
  background: linear-gradient(180deg, #18204A 0%, #101430 100%);
  border-color: #5868FF;
  color: #8898FF;
}

/* OK key — green accent (confirm) */
.key-btn[data-fn="OK"] {
  background: linear-gradient(180deg, #142818 0%, #0C1C10 100%);
  border-color: #1E4828;
  color: #38B858;
  font-size: 8px;
}
.key-btn[data-fn="OK"]:active, .key-btn[data-fn="OK"].pressed {
  background: linear-gradient(180deg, #0E2E1C 0%, #091A10 100%);
  border-color: var(--mk-green);
  color: var(--mk-green);
}

/* DELETE key — red tint */
.key-btn[data-fn="DEL"] {
  background: linear-gradient(180deg, #281010 0%, #180808 100%);
  border-color: #3A1818;
  color: #B03838;
}
.key-btn[data-fn="DEL"]:active, .key-btn[data-fn="DEL"].pressed {
  background: linear-gradient(180deg, #401010 0%, #280808 100%);
  border-color: #FF453A;
  color: #FF8080;
}

/* SPACE key */
.key-btn[data-fn="SPACE"] {
  color: #4A7A4A;
  letter-spacing: 0.3em;
  font-size: 10px;
}

/* Tone-bearing keys (T34, ZHT2, T5A) — purple tint */
.key-btn[data-fn="T34"],
.key-btn[data-fn="ZHT2"],
.key-btn[data-fn="T5A"] {
  background: linear-gradient(180deg, #1E1428 0%, #14101C 100%);
  border-color: #2C1C3C;
  color: #8850C0;
}
.key-btn[data-fn="T34"]:active, .key-btn[data-fn="T34"].pressed,
.key-btn[data-fn="ZHT2"]:active, .key-btn[data-fn="ZHT2"].pressed,
.key-btn[data-fn="T5A"]:active,  .key-btn[data-fn="T5A"].pressed {
  background: linear-gradient(180deg, #3A1A50 0%, #260E38 100%);
  border-color: #BF5AF2;
  color: #D08AFF;
}

/* MODE key — amber tint */
.key-btn[data-fn="MODE"] {
  background: linear-gradient(180deg, #241A0C 0%, #181008 100%);
  border-color: #382808;
  color: #A87828;
}
.key-btn[data-fn="MODE"]:active, .key-btn[data-fn="MODE"].pressed {
  background: linear-gradient(180deg, #402808 0%, #2A1808 100%);
  border-color: #FFD60A;
  color: #FFD060;
}

/* SET key — steel blue tint */
.key-btn[data-fn="SET"] {
  background: linear-gradient(180deg, #141E2C 0%, #0C1420 100%);
  border-color: #1E2E3C;
  color: #3870A0;
}
.key-btn[data-fn="SET"]:active, .key-btn[data-fn="SET"].pressed {
  background: linear-gradient(180deg, #183050 0%, #102038 100%);
  border-color: #64D2FF;
  color: #64D2FF;
}

/* FUNC / BACK keys — muted green */
.key-btn[data-fn="FUNC"],
.key-btn[data-fn="BACK"] {
  background: linear-gradient(180deg, #102010 0%, #081408 100%);
  border-color: #1A3A1A;
  color: #386038;
  font-size: 7px;
}

/* VOL+/VOL- keys — amber tint */
.key-btn[data-fn="VOLUP"],
.key-btn[data-fn="VOLDN"] {
  background: linear-gradient(180deg, #261E08 0%, #1A1408 100%);
  border-color: #382808;
  color: #907020;
}
.key-btn[data-fn="VOLUP"]:active, .key-btn[data-fn="VOLUP"].pressed,
.key-btn[data-fn="VOLDN"]:active, .key-btn[data-fn="VOLDN"].pressed {
  background: linear-gradient(180deg, #403010 0%, #2A2008 100%);
  border-color: #FFD60A;
  color: #FFD60A;
}

/* ── Device Bottom Row ───────────────────────────────────────── */
.device-bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.device-port {
  width: 44px;
  height: 8px;
  background: #040804;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.95), 0 0 0 1px #0A1A0A;
}

.usb-c-port {
  width: 18px;
  height: 4px;
  background: #0A140A;
  border-radius: 2px;
  border: 1px solid #1A3A1A;
}

.device-pcb-label {
  font-size: 6px;
  color: #1E4A1E;
  letter-spacing: 1.5px;
  font-family: 'Courier New', monospace;
}

.device-led {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--mk-green);
  box-shadow: 0 0 4px var(--mk-green), 0 0 10px rgba(48,209,88,0.5);
  animation: led-pulse 3s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes led-pulse {
  0%, 100% { opacity: 0.85; }
  50%       { opacity: 0.25; }
}

/* ── Connection Status Bar ─────────────────────────────────── */
#connection-bar .conn-dot-sim   { background: #1A4A1A; }
#connection-bar .conn-dot-conn  { background: var(--mk-green); animation: led-pulse 2s infinite; }
#connection-bar .conn-dot-err   { background: var(--mk-danger); }

/* ── Debug Panel ───────────────────────────────────────────── */
#debug-log {
  scrollbar-width: thin;
  scrollbar-color: #1A3A1A transparent;
}
#debug-log::-webkit-scrollbar       { width: 3px; }
#debug-log::-webkit-scrollbar-thumb { background: #1A3A1A; border-radius: 2px; }

.dbg { padding: 1px 0; border-bottom: 1px solid #0A1A0A; font-size: 10px; }
.dbg-key    { color: #30A850; }
.dbg-mie    { color: #6070D0; }
.dbg-serial { color: #C0A030; }
.dbg-err    { color: #D06050; }
.dbg-info   { color: #40A0B0; }

/* ── Responsive Scaling ─────────────────────────────────────── */
/* JS scaleDevice() handles zoom via element.style.zoom at runtime */
/* Tall screens: give it more room to breathe */
@media (min-height: 900px) {
  body { padding-top: 24px; }
}

/* ── Loading Splash ──────────────────────────────────────────── */
#splash {
  position: fixed;
  inset: 0;
  background: #050A05;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  gap: 16px;
  transition: opacity 0.5s ease;
}
#splash.fade-out { opacity: 0; pointer-events: none; }

.splash-logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--mk-green);
  letter-spacing: 3px;
}

.splash-sub {
  font-size: 11px;
  color: #1E4A1E;
  letter-spacing: 2px;
}

.splash-bar {
  width: 160px;
  height: 2px;
  background: #0A1C0A;
  border-radius: 1px;
  overflow: hidden;
}

.splash-progress {
  height: 100%;
  background: var(--mk-green);
  border-radius: 1px;
  width: 0%;
  transition: width 0.4s ease;
  box-shadow: 0 0 8px var(--mk-green);
}