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

/* ─── Design Tokens ─────────────────────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg:        #080A13;
  --bg2:       #0F1220;
  --card:      #13192B;
  --card-hi:   #181F34;
  --card-deep: #0B0D18;

  /* Borders */
  --border:    #1E2840;
  --border-li: #2C3A5E;
  --border-hi: #3D5080;

  /* Brand */
  --primary:     #4ECDC4;
  --primary-dk:  #2BA89F;
  --primary-dim: rgba(78,205,196,0.12);
  --secondary:   #F5C842;
  --secondary-dk:#C49B1A;

  /* State */
  --danger:    #E05252;
  --danger-dk: #A33333;
  --success:   #4DB870;
  --success-dk:#2E8A4A;
  --warning:   #E0923A;

  /* Text */
  --text:      #EFF3FF;
  --text-2:    #7A8BAD;
  --text-3:    #424F6B;

  /* Typography */
  --font-pixel: 'Press Start 2P', monospace;
  --font-ui:    'Inter', system-ui, sans-serif;
}

/* ─── Base ───────────────────────────────────────────────────────────────────── */
html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  /* Stone-tile grid — very subtle */
  background-image:
    linear-gradient(rgba(78,205,196,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78,205,196,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ─── Screen Manager ────────────────────────────────────────────────────────── */
.screen {
  display: none;
  min-height: 100vh;
  min-height: 100dvh;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 20px;
  animation: screenIn 0.18s ease;
}
.screen.active { display: flex; }

@keyframes screenIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Container ─────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 380px;
}

/* ─── Logo ──────────────────────────────────────────────────────────────────── */
.logo {
  text-align: center;
  margin-bottom: 36px;
}

.logo-icon-svg {
  display: block;
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: var(--primary);
  filter: drop-shadow(0 0 10px rgba(78,205,196,0.45));
  animation: logoGlow 3s ease-in-out infinite;
}
@keyframes logoGlow {
  0%,100% { filter: drop-shadow(0 0 6px rgba(78,205,196,0.3)); }
  50%     { filter: drop-shadow(0 0 18px rgba(78,205,196,0.7)); }
}

.logo-title {
  font-family: var(--font-pixel);
  font-size: 20px;
  color: var(--primary);
  letter-spacing: 4px;
  line-height: 1.4;
  text-shadow: 0 0 24px rgba(78,205,196,0.5);
}

.logo-divider {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-li), transparent);
  margin: 14px auto;
}

.logo-sub {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ─── Card ──────────────────────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border-li);
  padding: 24px;
  width: 100%;
}

.card-title {
  font-family: var(--font-pixel);
  font-size: 8px;
  color: var(--secondary);
  letter-spacing: 1.5px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

/* ─── Mode Select ───────────────────────────────────────────────────────────── */
.mode-select {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.mode-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card-deep);
  border: 1px solid var(--border-li);
  border-left: 3px solid var(--primary);
  color: var(--text);
  padding: 18px 16px 18px 18px;
  cursor: pointer;
  text-align: left;
  transition: background 0.12s, border-color 0.12s, box-shadow 0.12s;
  -webkit-tap-highlight-color: transparent;
  outline: none;
  width: 100%;
}
.mode-btn:hover,
.mode-btn:focus-visible {
  background: var(--card);
  border-color: var(--primary);
  box-shadow: inset 0 0 0 1px rgba(78,205,196,0.2);
}
.mode-btn:active { transform: scale(0.985); }

.mode-btn-icon {
  width: 28px;
  height: 28px;
  color: var(--primary);
  flex-shrink: 0;
}

.mode-btn-label {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mode-btn-main {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}
.mode-btn-sub {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 400;
  color: var(--text-2);
}

.mode-btn-arrow {
  width: 18px;
  height: 18px;
  color: var(--text-3);
  flex-shrink: 0;
  transition: color 0.12s, transform 0.12s;
}
.mode-btn:hover .mode-btn-arrow {
  color: var(--primary);
  transform: translateX(2px);
}

/* ─── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: block;
  width: 100%;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1.5px solid transparent;
  padding: 15px 16px;
  cursor: pointer;
  text-align: center;
  transition: background 0.12s, border-color 0.12s, transform 0.08s, box-shadow 0.12s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  outline: none;
  border-radius: 0;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none !important; }
.btn + .btn  { margin-top: 10px; }

.btn-primary {
  background: var(--primary);
  color: #050811;
  border-color: var(--primary);
  box-shadow: 0 0 0 0 rgba(78,205,196,0);
}
.btn-primary:hover:not(:disabled) {
  background: #5DE0D6;
  box-shadow: 0 4px 20px rgba(78,205,196,0.3);
}

.btn-secondary {
  background: var(--secondary);
  color: #1A1200;
  border-color: var(--secondary);
}
.btn-secondary:hover:not(:disabled) { background: #F7D060; }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border-color: var(--border-li);
}
.btn-ghost:hover:not(:disabled) {
  color: var(--text);
  border-color: var(--border-hi);
  background: var(--card);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}
.btn-danger:hover:not(:disabled) { background: #E96666; }

/* ─── Onboarding step label ─────────────────────────────────────────────────── */
.onboarding-step {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 14px;
}

/* ─── PIN Dots ──────────────────────────────────────────────────────────────── */
.pin-dots {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 24px 0;
}
.pin-dot {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-li);
  background: transparent;
  transform: rotate(45deg);
  transition: background 0.12s, border-color 0.12s, box-shadow 0.12s;
}
.pin-dot.filled {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 14px rgba(78,205,196,0.55);
}
.pin-dot.error {
  background: var(--danger);
  border-color: var(--danger);
  box-shadow: 0 0 12px rgba(224,82,82,0.5);
}

/* ─── Numpad ────────────────────────────────────────────────────────────────── */
.numpad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 8px;
}
.numpad-key {
  background: var(--card-deep);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 22px;
  font-weight: 600;
  padding: 16px 0;
  cursor: pointer;
  text-align: center;
  transition: background 0.1s, border-color 0.1s, transform 0.08s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  outline: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.numpad-key:hover  { border-color: var(--border-hi); background: var(--card); }
.numpad-key:active { background: var(--border); transform: scale(0.93); }
.numpad-key.del {
  color: var(--danger);
}
.numpad-key.del svg { width: 22px; height: 22px; }
.numpad-key.empty {
  background: transparent;
  border-color: transparent;
  cursor: default;
  pointer-events: none;
}

/* ─── Shake animation ───────────────────────────────────────────────────────── */
@keyframes shake {
  0%,100% { transform: translateX(0); }
  20%     { transform: translateX(-6px); }
  40%     { transform: translateX(6px); }
  60%     { transform: translateX(-4px); }
  80%     { transform: translateX(4px); }
}
.shake { animation: shake 0.35s ease; }

/* ─── Alerts ────────────────────────────────────────────────────────────────── */
.alert {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
  padding: 12px 14px;
  border-left: 3px solid;
  margin-bottom: 16px;
}
.alert-error   { border-color: var(--danger);  color: #F09090; background: rgba(224,82,82,0.08); }
.alert-success { border-color: var(--success); color: #7DD89A; background: rgba(77,184,112,0.08); }
.alert-info    { border-color: var(--primary); color: #7AD4CE; background: rgba(78,205,196,0.08); }
.alert-warn    { border-color: var(--warning); color: #E0A870; background: rgba(224,147,58,0.08); }

/* ─── Setup notice ──────────────────────────────────────────────────────────── */
.setup-notice {
  text-align: center;
  padding: 32px 16px;
}
.setup-notice .notice-icon {
  width: 48px;
  height: 48px;
  color: var(--warning);
  margin: 0 auto 20px;
  display: block;
}
.setup-notice p {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 20px;
}
.setup-notice a {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--primary);
  padding-bottom: 2px;
}

/* ─── Onboarding done list ──────────────────────────────────────────────────── */
.done-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.done-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  color: var(--success);
}
.done-list svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--success);
}

/* ─── Card hint text ────────────────────────────────────────────────────────── */
.card-hint {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 400;
  color: var(--text-2);
  text-align: center;
  line-height: 1.6;
  margin-bottom: 4px;
}

/* ─── Back button link style ────────────────────────────────────────────────── */
.btn-back {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--text-2);
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  padding: 10px 0;
  margin-top: 10px;
  width: 100%;
  justify-content: center;
  transition: color 0.12s;
  -webkit-tap-highlight-color: transparent;
}
.btn-back:hover { color: var(--text); }
.btn-back svg   { width: 16px; height: 16px; }

/* ─── Spinner ───────────────────────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-li);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Loading Overlay ───────────────────────────────────────────────────────── */
#loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  flex-direction: column;
  gap: 18px;
  transition: opacity 0.25s;
}
#loading-overlay.fade-out { opacity: 0; pointer-events: none; }
.load-icon-svg {
  width: 44px;
  height: 44px;
  color: var(--primary);
  filter: drop-shadow(0 0 10px rgba(78,205,196,0.5));
}
.load-text {
  font-family: var(--font-pixel);
  font-size: 8px;
  color: var(--text-2);
  letter-spacing: 3px;
}

/* ─── Placeholder screens ───────────────────────────────────────────────────── */
.placeholder-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  display: block;
}
.placeholder-title {
  font-family: var(--font-pixel);
  font-size: 9px;
  letter-spacing: 2px;
  text-align: center;
  margin-bottom: 10px;
}
.placeholder-sub {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-2);
  text-align: center;
  line-height: 1.6;
  margin-bottom: 24px;
}

/* ─── Utility ───────────────────────────────────────────────────────────────── */
.mt-sm  { margin-top: 8px; }
.mt-md  { margin-top: 16px; }
.mt-lg  { margin-top: 24px; }
.mb-sm  { margin-bottom: 8px; }
.mb-md  { margin-bottom: 16px; }
.hidden { display: none !important; }

/* ─── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 360px) {
  .logo-title  { font-size: 17px; }
  .numpad-key  { padding: 13px 0; font-size: 20px; }
  .mode-btn    { padding: 15px 14px 15px 16px; }
}
@media (min-width: 600px) {
  .logo-icon-svg { width: 60px; height: 60px; }
  .logo-title    { font-size: 26px; }
  .card          { padding: 32px; }
}