/* ── Reset & base ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #05070f;
  --surface:   #0a0f1e;
  --card:      #0c1322;
  --border:    #1c2c4a;
  --text:      #d6f3ff;
  --muted:     #5e7da3;
  --accent:    #00e5ff;
  --accent2:   #ff2bd6;
  --armed:     #00e5ff;
  --pending:   #ffd60a;
  --triggered: #ff124f;
  --success:   #0aff9d;
  --font:      'Segoe UI', system-ui, -apple-system, sans-serif;
  --mono:      'Cascadia Mono', 'Consolas', 'Roboto Mono', monospace;
  --cut:       polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  --cut-sm:    polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

html {
  height: 100%;
  /* Prevent zoom on touch */
  touch-action: manipulation;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  height: 100%;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

/* Neon grid backdrop */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(0,229,255,.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 110%, rgba(255,43,214,.05) 0%, transparent 60%),
    linear-gradient(rgba(0,229,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,.035) 1px, transparent 1px);
  background-size: auto, auto, 40px 40px, 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* CRT scanlines */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(0deg, rgba(0,0,0,.18) 0 1px, transparent 1px 3px);
  pointer-events: none;
  z-index: 2;
  animation: crt-flicker 9s infinite;
}

@keyframes crt-flicker {
  0%, 100% { opacity: 1; }
  97.5%    { opacity: 1; }
  98%      { opacity: .65; }
  98.5%    { opacity: 1; }
  99%      { opacity: .8; }
  99.5%    { opacity: 1; }
}

#root {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* ── Disconnected banner ─────────────────────────────────────────────────────── */
#disconnect-banner {
  display: none;
  background: rgba(255,18,79,.15);
  border-bottom: 1px solid var(--triggered);
  color: #ff7a9a;
  text-align: center;
  padding: 8px;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  flex-shrink: 0;
  animation: blink-soft 1.2s ease-in-out infinite alternate;
}

#disconnect-banner.visible { display: block; }

@keyframes blink-soft {
  from { opacity: 1; }
  to   { opacity: .55; }
}

/* ── Status banner ───────────────────────────────────────────────────────────── */
#status-banner {
  padding: 20px 24px;
  text-align: center;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  transition: background .3s;
  position: relative;
}

#status-banner.status-secure {
  background: linear-gradient(180deg, rgba(10,255,157,.06), transparent);
  box-shadow: inset 0 -1px 0 rgba(10,255,157,.25);
}
#status-banner.status-armed {
  background: linear-gradient(180deg, rgba(0,229,255,.1), transparent);
  box-shadow: inset 0 -1px 0 rgba(0,229,255,.4);
}
#status-banner.status-pending {
  background: rgba(255,214,10,.12);
  animation: flash-pending .8s ease-in-out infinite alternate;
}
#status-banner.status-triggered {
  background: rgba(255,18,79,.3);
  animation: flash-alarm .8s linear infinite;
}

@keyframes flash-pending {
  from { background: rgba(255,214,10,.08); box-shadow: inset 0 -1px 0 rgba(255,214,10,.3); }
  to   { background: rgba(255,214,10,.22); box-shadow: inset 0 -1px 0 rgba(255,214,10,.8); }
}

/* Hold-style keyframes: hard on/off strobe without steps() easing,
   which older Android WebViews fail to parse. */
@keyframes flash-alarm {
  0%, 49%   { background: rgba(255,18,79,.5); box-shadow: inset 0 0 60px rgba(255,18,79,.45); }
  50%, 100% { background: rgba(255,18,79,.12); box-shadow: inset 0 0 10px rgba(255,18,79,.1); }
}

#status-text {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.status-secure #status-text { color: var(--success); text-shadow: 0 0 16px rgba(10,255,157,.6); }
.status-armed #status-text { color: var(--accent); text-shadow: 0 0 16px rgba(0,229,255,.7); }
.status-pending #status-text { color: var(--pending); text-shadow: 0 0 16px rgba(255,214,10,.7); }
.status-triggered #status-text {
  color: #fff;
  text-shadow: 0 0 8px #ff124f, 0 0 24px #ff124f;
  animation: blink-hard .8s linear infinite;
}

@keyframes blink-hard {
  0%, 49%   { opacity: 1; }
  50%, 100% { opacity: .4; }
}

#status-sub {
  font-size: 13px;
  font-family: var(--mono);
  letter-spacing: .06em;
  color: var(--muted);
  margin-top: 4px;
}

.status-triggered #status-sub { color: #ffb3c4; }

/* ── Zone list ───────────────────────────────────────────────────────────────── */
#zone-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.zone-btn {
  background: var(--card);
  border: 1px solid var(--border);
  clip-path: var(--cut);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: border-color .2s, background .2s, transform .12s;
  width: 100%;
  color: var(--text);
  font-family: var(--font);
  text-align: left;
  min-height: 72px;
}

.zone-btn:active { transform: scale(.985); filter: brightness(.9); }

.zone-btn.z-armed {
  border-color: var(--armed);
  background: rgba(0,229,255,.07);
  filter: drop-shadow(0 0 8px rgba(0,229,255,.25));
}
.zone-btn.z-arming {
  border-color: rgba(0,229,255,.45);
  animation: pulse-z-cyan 1s ease-in-out infinite alternate;
}
.zone-btn.z-pending {
  border-color: var(--pending);
  background: rgba(255,214,10,.08);
  animation: pulse-z .7s ease-in-out infinite alternate;
}
.zone-btn.z-triggered {
  border-color: var(--triggered);
  animation: pulse-z-red .9s linear infinite;
}

@keyframes pulse-z-cyan {
  from { filter: drop-shadow(0 0 2px rgba(0,229,255,.15)); }
  to   { filter: drop-shadow(0 0 12px rgba(0,229,255,.5)); }
}
@keyframes pulse-z {
  from { filter: drop-shadow(0 0 2px rgba(255,214,10,.2)); }
  to   { filter: drop-shadow(0 0 14px rgba(255,214,10,.55)); }
}
@keyframes pulse-z-red {
  0%, 49% {
    background: rgba(255,18,79,.28);
    filter: drop-shadow(0 0 18px rgba(255,18,79,.7));
  }
  50%, 100% {
    background: rgba(255,18,79,.06);
    filter: drop-shadow(0 0 4px rgba(255,18,79,.2));
  }
}

.zone-btn-icon { font-size: 26px; flex-shrink: 0; }

.zone-btn-info { flex: 1; }
.zone-btn-name { font-size: 17px; font-weight: 700; letter-spacing: .04em; }
.zone-btn-state {
  font-size: 11px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  margin-top: 2px;
}

.z-armed .zone-btn-state { color: var(--accent); }
.z-pending .zone-btn-state { color: var(--pending); }
.z-triggered .zone-btn-state { color: #ff7a9a; }

.zone-btn-countdown {
  font-size: 22px;
  font-weight: 800;
  font-family: var(--mono);
  color: var(--pending);
  text-shadow: 0 0 12px rgba(255,214,10,.7);
  flex-shrink: 0;
  animation: count-pulse 1s ease-in-out infinite alternate;
}

@keyframes count-pulse {
  from { text-shadow: 0 0 6px rgba(255,214,10,.4); }
  to   { text-shadow: 0 0 16px rgba(255,214,10,.9); }
}

/* ── Global action row ───────────────────────────────────────────────────────── */
#global-actions {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.btn-global {
  flex: 1;
  padding: 14px;
  clip-path: var(--cut-sm);
  border: none;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: .12em;
  position: relative;
  overflow: hidden;
  transition: filter .15s, transform .1s;
}

.btn-global::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.22) 50%, transparent 70%);
  transform: translateX(-110%);
  transition: transform .4s ease;
  pointer-events: none;
}

.btn-global:active { filter: brightness(.85); transform: translateY(1px); }
.btn-global:active::after { transform: translateX(110%); }

.btn-arm-all {
  background: var(--accent);
  color: #02131a;
  box-shadow: 0 0 16px rgba(0,229,255,.35);
}
.btn-disarm-all {
  background: var(--surface);
  border: 1px solid var(--accent2);
  color: var(--accent2);
  box-shadow: 0 0 12px rgba(255,43,214,.2);
}

/* ── PIN Pad overlay ─────────────────────────────────────────────────────────── */
#pin-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(2,4,10,.94);
  backdrop-filter: blur(4px);
  z-index: 50;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 24px;
}

#pin-overlay.visible { display: flex; animation: overlay-in .2s ease-out; }

@keyframes overlay-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

#pin-title {
  font-size: 19px;
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: .12em;
  text-shadow: 0 0 14px rgba(0,229,255,.5);
}

#pin-sub {
  font-size: 13px;
  font-family: var(--mono);
  letter-spacing: .06em;
  color: var(--muted);
  text-align: center;
  min-height: 20px;
}

/* Countdown on entry delay during PIN overlay */
#pin-entry-countdown {
  font-size: 52px;
  font-weight: 800;
  font-family: var(--mono);
  color: var(--pending);
  text-shadow: 0 0 24px rgba(255,214,10,.8);
  min-height: 60px;
  animation: count-pulse .8s ease-in-out infinite alternate;
}

#pin-display {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.pin-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: transparent;
  transition: background .1s, border-color .1s, box-shadow .1s;
}

.pin-dot.filled {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(0,229,255,.7);
}
.pin-dot.error {
  background: var(--triggered);
  border-color: var(--triggered);
  box-shadow: 0 0 10px rgba(255,18,79,.7);
  animation: dot-shake .3s ease-in-out;
}

@keyframes dot-shake {
  0%, 100% { transform: translateX(0); }
  25%      { transform: translateX(-3px); }
  75%      { transform: translateX(3px); }
}

#pin-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 320px;
}

.pin-key {
  background: var(--card);
  border: 1px solid var(--border);
  clip-path: var(--cut-sm);
  padding: 18px;
  font-size: 24px;
  font-weight: 700;
  font-family: var(--mono);
  text-align: center;
  cursor: pointer;
  color: var(--text);
  transition: background .12s, border-color .12s, text-shadow .12s;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pin-key:active {
  background: rgba(0,229,255,.2);
  border-color: var(--accent);
  text-shadow: 0 0 12px rgba(0,229,255,.9);
}
.pin-key.key-del { font-size: 18px; background: rgba(255,18,79,.08); border-color: rgba(255,18,79,.35); }
.pin-key.key-ok  { background: var(--accent); border-color: var(--accent); color: #02131a; }
.pin-key.key-cancel {
  grid-column: span 2;
  background: var(--surface);
  font-size: 13px;
  font-family: var(--font);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--muted);
}

#pin-error {
  color: var(--triggered);
  font-size: 13px;
  font-family: var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
  min-height: 20px;
  text-align: center;
  text-shadow: 0 0 10px rgba(255,18,79,.6);
}

/* ── Footer & language switcher ──────────────────────────────────────────────── */
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 10px;
  font-family: var(--mono);
  letter-spacing: .1em;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

#keypad-footer {
  flex: 1;
  text-align: center;
}

.lang-switcher {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.lang-btn {
  background: transparent;
  border: 1px solid var(--border);
  clip-path: var(--cut-sm);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  padding: 3px 8px;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s, text-shadow .15s;
}

.lang-btn:hover { background: var(--surface); color: var(--text); }

.lang-btn.active {
  background: rgba(0,229,255,.15);
  border-color: var(--accent);
  color: var(--accent);
  text-shadow: 0 0 8px rgba(0,229,255,.6);
}