/* ═══════════════════════════════════════════
   SECUREGEN v2 — Zero-Trust Terminal
   ═══════════════════════════════════════════ */

:root {
  --bg:          #080a0d;
  --bg-card:     #0d1017;
  --bg-card2:    #111520;
  --border:      #1a2030;
  --border-hi:   #243040;
  --accent:      #00d4aa;
  --accent-dim:  rgba(0,212,170,0.1);
  --accent-glow: rgba(0,212,170,0.22);
  --upper:       #60a5fa;
  --lower:       #a3e635;
  --number:      #fb923c;
  --symbol:      #e879f9;
  --text-1:      #e8edf5;
  --text-2:      #6b7a94;
  --text-3:      #2e3a4e;
  --mono:        'IBM Plex Mono', monospace;
  --sans:        'IBM Plex Sans', sans-serif;
  --r:           10px;
  --r-sm:        6px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--sans);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

/* ── Canvas ── */
#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.75;
}

/* ── Layout ── */
.container {
  position: relative;
  z-index: 1;
  max-width: 560px;
  margin: 0 auto;
  padding: 32px 16px 72px;
}

/* ── Header ── */
.header { margin-bottom: 24px; }

.logo-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.logo-mark {
  color: var(--accent);
  display: flex;
  filter: drop-shadow(0 0 6px var(--accent));
}

.logo-text {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.02em;
}

.logo-version {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--accent);
  border: 1px solid currentColor;
  border-radius: 4px;
  padding: 1px 5px;
  opacity: 0.7;
  margin-top: 1px;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-2);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 12px;
}

.trust-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  flex-shrink: 0;
  animation: pulse-dot 2.5s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.75; }
}

/* ── Mode Toggle ── */
.mode-toggle-wrap {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 4px;
  gap: 4px;
  margin-bottom: 14px;
}

.mode-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px;
  border: none;
  border-radius: calc(var(--r) - 3px);
  background: transparent;
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  touch-action: manipulation;
  letter-spacing: 0.03em;
  min-height: 42px;
}

.mode-btn:hover { color: var(--text-1); }
.mode-btn.active {
  background: var(--accent);
  color: #000;
  font-weight: 600;
  box-shadow: 0 0 16px var(--accent-glow);
}

/* ── Output Card (result-first — always on top) ── */
.output-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hi);
  border-radius: var(--r);
  padding: 18px;
  margin-bottom: 14px;
  transition: border-color 0.3s;
  /* Subtle glow to signal it's the focus */
  box-shadow: 0 0 0 1px rgba(0,212,170,0.04), 0 4px 24px rgba(0,0,0,0.4);
}

.output-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.output-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.14em;
}

.output-actions { display: flex; gap: 6px; }

.action-btn {
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg);
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.18s ease;
  touch-action: manipulation;
}

.action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.action-btn.copied {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}

/* ── Output Display ── */
.output-display {
  min-height: 56px;
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  margin-bottom: 14px;
}

.output-placeholder {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-3);
}

.output-placeholder::after {
  content: '';
  display: inline-block;
  width: 1px; height: 0.9em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: -0.1em;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.output-chars {
  font-family: var(--mono);
  font-size: clamp(0.78rem, 3vw, 1rem);
  font-weight: 500;
  word-break: break-all;
  line-height: 1.7;
  letter-spacing: 0.04em;
  user-select: all;
  flex: 1;
}

.ch-upper  { color: var(--upper); }
.ch-lower  { color: var(--lower); }
.ch-number { color: var(--number); }
.ch-symbol { color: var(--symbol); }

/* ── Strength ── */
.strength-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 5px;
}

.strength-segments { display: flex; gap: 3px; flex-shrink: 0; }

.seg {
  display: block;
  width: 24px; height: 3px;
  border-radius: 999px;
  background: var(--border);
  transition: background 0.4s ease;
}

.strength-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.strength-entropy {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-2);
  margin-left: auto;
}

.strength-crack {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-2);
}

.str-1 .seg:nth-child(-n+1) { background: #ef4444; }
.str-2 .seg:nth-child(-n+2) { background: #f59e0b; }
.str-3 .seg:nth-child(-n+3) { background: #84cc16; }
.str-4 .seg:nth-child(-n+4) { background: #10b981; }
.str-5 .seg:nth-child(-n+5) { background: var(--accent); }

.str-1 .strength-label { color: #ef4444; }
.str-2 .strength-label { color: #f59e0b; }
.str-3 .strength-label { color: #84cc16; }
.str-4 .strength-label { color: #10b981; }
.str-5 .strength-label { color: var(--accent); }

/* ── Legend ── */
.legend-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-2);
}

.leg-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Panel ── */
.panel { display: none; }
.panel.active { display: block; animation: fadeUp 0.2s ease; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Section Label ── */
.section-label {
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text-3);
  margin: 14px 0 7px;
}

/* ── Slider Card ── */
.slider-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px 16px 22px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
}

.slider-val {
  font-family: var(--mono);
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.03em;
}

.slider-range-hint {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-3);
}

.slider-wrap {
  position: relative;
  padding-bottom: 20px;
}

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%; height: 2px;
  background: var(--border);
  border-radius: 999px;
  outline: none;
  cursor: pointer;
  display: block;
  position: relative;
  z-index: 2;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 0 3px rgba(0,212,170,0.18), 0 0 10px var(--accent-glow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  touch-action: manipulation;
}

.slider::-webkit-slider-thumb:hover,
.slider:active::-webkit-slider-thumb {
  transform: scale(1.2);
  box-shadow: 0 0 0 5px rgba(0,212,170,0.18), 0 0 18px var(--accent-glow);
}

.slider::-moz-range-thumb {
  width: 20px; height: 20px;
  border: none; border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.slider-track-fill {
  position: absolute;
  top: 9px; left: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
  pointer-events: none;
  z-index: 1;
}

.slider-ticks {
  position: absolute;
  left: 0; right: 0;
  top: 16px;
  pointer-events: none;
}

.tick-mark {
  position: absolute;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--text-3);
  white-space: nowrap;
}

/* ── Two-column settings layout ── */
.two-col-settings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: start;
}

/* On very small screens, stack vertically */
@media (max-width: 360px) {
  .two-col-settings { grid-template-columns: 1fr; }
}

.settings-col { display: flex; flex-direction: column; }

/* ── Character toggle cards (2×2 inside left col) ── */
.toggle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.toggle-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 10px 10px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  touch-action: manipulation;
  user-select: none;
}

.toggle-card input { display: none; }
.toggle-card:hover { border-color: var(--border-hi); }
.toggle-card:has(input:checked) {
  border-color: var(--border-hi);
  background: var(--bg-card2);
}

.tc-inner { display: flex; flex-direction: column; gap: 3px; }

.tc-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  margin-bottom: 3px;
  display: block;
}

.upper-dot  { background: var(--upper);  box-shadow: 0 0 5px var(--upper); }
.lower-dot  { background: var(--lower);  box-shadow: 0 0 5px var(--lower); }
.number-dot { background: var(--number); box-shadow: 0 0 5px var(--number); }
.symbol-dot { background: var(--symbol); box-shadow: 0 0 5px var(--symbol); }

.tc-title {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-1);
  line-height: 1;
}

.tc-sub {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--text-3);
}

.tc-check {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: transparent;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.toggle-card:has(input:checked) .tc-check {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  box-shadow: 0 0 6px var(--accent-glow);
}

/* ── Options row (toggle switches) ── */
.opts-row {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}

.opt-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  cursor: pointer;
  transition: background 0.15s;
  touch-action: manipulation;
  user-select: none;
  border-bottom: 1px solid var(--border);
}

.opt-toggle:last-child { border-bottom: none; }
.opt-toggle:hover { background: var(--bg-card2); }
.opt-toggle input { display: none; }

.opt-track {
  width: 32px; height: 17px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  position: relative;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.opt-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--text-3);
  transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.opt-toggle input:checked + .opt-track { background: var(--accent); border-color: var(--accent); }
.opt-toggle input:checked + .opt-track .opt-thumb { left: 17px; background: #000; }

/* Radio styled as toggle */
.radio-as-toggle input[type="radio"]:checked + .opt-track { background: var(--accent); border-color: var(--accent); }
.radio-as-toggle input[type="radio"]:checked + .opt-track .opt-thumb { left: 17px; background: #000; }

.opt-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-2);
  flex: 1;
  line-height: 1.3;
}

.opt-label em {
  font-style: normal;
  color: var(--text-3);
  font-size: 0.64rem;
}

/* ── Exclude input (inside right col) ── */
.exclude-input {
  margin-top: 8px;
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text-1);
  font-family: var(--mono);
  font-size: max(16px, 0.78rem);
  padding: 10px 12px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.exclude-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.exclude-input::placeholder { color: var(--text-3); font-size: 0.7rem; }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: var(--accent);
  color: #000;
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: 999px;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.2s ease;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

/* ── Responsive ── */
@media (max-width: 380px) {
  .container { padding: 24px 12px 60px; }
  .slider-val { font-size: 1.3rem; }
  .trust-badge { font-size: 0.58rem; }
}

@media (min-width: 600px) {
  .container { padding: 44px 24px 80px; }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; }

/* ── Footer ── */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  padding: 10px 16px;
  background: linear-gradient(to top, var(--bg) 60%, transparent);
  z-index: 10;
  pointer-events: none;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 0.64rem;
  color: var(--text-3);
  text-decoration: none;
  letter-spacing: 0.06em;
  pointer-events: all;
  transition: color 0.2s ease;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.footer-link:hover {
  color: var(--accent);
  border-color: var(--border);
  background: var(--bg-card);
}

.footer-link svg {
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.footer-link:hover svg { opacity: 1; }

/* ── Passphrase info ── */
.pp-info {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-3);
  padding: 8px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
}

.pp-info svg { flex-shrink: 0; color: var(--accent); opacity: 0.6; }

/* ── QR Modal ── */
.qr-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.qr-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-hi);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  box-shadow: 0 0 60px rgba(0,212,170,0.15), 0 20px 60px rgba(0,0,0,0.6);
  animation: slideUp 0.25s cubic-bezier(0.34,1.56,0.64,1);
  max-width: 320px;
  width: 100%;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.qr-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.qr-modal-title {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-2);
}

.qr-close {
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg);
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.15s ease;
}

.qr-close:hover { border-color: var(--accent); color: var(--accent); }

#qr-canvas {
  border-radius: 12px;
  display: block;
}

.qr-hint {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
}