/* ═══════════════════════════════════════════
   VaultKey · style.css
   ═══════════════════════════════════════════ */

/* ── TOKENS ─────────────────────────────── */
:root {
  --bg:           #0b0f1a;
  --surface:      #111827;
  --surface-2:    #1a2236;
  --border:       #1f2e47;
  --accent:       #00e5ff;
  --accent-dim:   #00b8cc;
  --accent-glow:  rgba(0,229,255,.18);
  --text:         #e2eaf6;
  --muted:        #64748b;
  --danger:       #ff4d6d;
  --warn:         #fbbf24;
  --ok:           #34d399;
  --great:        #00e5ff;
  --radius:       14px;
  --mono:         'Space Mono', monospace;
  --display:      'Syne', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--display);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem 4rem;
  position: relative;
  overflow-x: hidden;
}

/* Animated grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .35;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 700px; height: 500px;
  background: radial-gradient(ellipse at center, rgba(0,229,255,.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ── LOGO / BRAND ────────────────────────── */
.brand {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 2.5rem;
  text-decoration: none;
}

.brand-icon {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--accent), #6c63ff);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 0 28px var(--accent-glow);
}

.brand-text { line-height: 1; }

.brand-name {
  font-family: var(--display);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--text);
}

.brand-name span { color: var(--accent); }

.brand-tagline {
  font-family: var(--mono);
  font-size: .65rem;
  color: var(--muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ── CARD ───────────────────────────────── */
.card-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 560px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0,229,255,.06),
    0 24px 64px rgba(0,0,0,.55);
}

.card-header-bar {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  padding: 1.1rem 1.6rem;
  display: flex; align-items: center; gap: .6rem;
}

.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }

.card-title-inner {
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--muted);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-left: auto;
}

.card-body-inner {
  padding: 2rem 2rem 2.2rem;
}

/* ── PASSWORD OUTPUT ────────────────────── */
.pw-output-wrap {
  position: relative;
  margin-bottom: 1.8rem;
}

.pw-output {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 700;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--accent);
  padding: 1rem 3.6rem 1rem 1.1rem;
  letter-spacing: .05em;
  word-break: break-all;
  min-height: 58px;
  transition: border-color .2s, box-shadow .2s;
}

.pw-output.has-value {
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.pw-placeholder {
  color: var(--muted);
  font-size: .85rem;
  font-weight: 400;
  letter-spacing: .04em;
}

.copy-btn {
  position: absolute;
  right: .75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.15rem;
  cursor: pointer;
  transition: color .2s;
  padding: .2rem;
}

.copy-btn:hover { color: var(--accent); }

/* ── STRENGTH BAR ───────────────────────── */
.strength-row {
  display: flex; align-items: center;
  gap: .75rem;
  margin-bottom: 1.8rem;
}

.strength-bars {
  display: flex; gap: 5px; flex: 1;
}

.strength-bar {
  flex: 1; height: 5px;
  background: var(--border);
  border-radius: 99px;
  transition: background .4s;
}

.strength-label-text {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  min-width: 70px;
  text-align: right;
}

/* Strength states */
.weak        .strength-bar:nth-child(-n+1) { background: var(--danger); }
.moderate    .strength-bar:nth-child(-n+2) { background: var(--warn); }
.strong      .strength-bar:nth-child(-n+3) { background: var(--ok); }
.very-strong .strength-bar                 { background: var(--great); }

.label-weak        { color: var(--danger); }
.label-moderate    { color: var(--warn); }
.label-strong      { color: var(--ok); }
.label-very-strong { color: var(--great); }

/* ── FORM CONTROLS ──────────────────────── */
label.form-label {
  font-size: .8rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .5rem;
}

.length-display {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 2.5rem;
  text-align: right;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
}

/* Toggle switches */
.toggle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin-top: .75rem;
}

.toggle-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .85rem 1rem;
  display: flex; align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}

.toggle-item:hover { border-color: var(--accent-dim); }

.toggle-item input[type="checkbox"] { display: none; }

.toggle-item input:checked ~ .toggle-track              { background: var(--accent); }
.toggle-item input:checked ~ .toggle-track .toggle-thumb { transform: translateX(18px); }

.toggle-item .item-label {
  font-size: .82rem;
  color: var(--text);
  display: flex; align-items: center; gap: .45rem;
}

.toggle-item .item-label i { color: var(--accent); font-size: .95rem; }

.toggle-track {
  width: 36px; height: 20px;
  background: var(--border);
  border-radius: 99px;
  position: relative;
  transition: background .2s;
  flex-shrink: 0;
}

.toggle-thumb {
  position: absolute;
  top: 3px; left: 3px;
  width: 14px; height: 14px;
  background: white;
  border-radius: 50%;
  transition: transform .2s;
}

/* ── GENERATE BUTTON ────────────────────── */
.btn-generate {
  width: 100%;
  margin-top: 1.8rem;
  padding: 1rem;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, var(--accent), #6c63ff);
  color: #0b0f1a;
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: .05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity .2s, transform .1s, box-shadow .2s;
  box-shadow: 0 4px 20px rgba(0,229,255,.25);
}

.btn-generate:hover {
  opacity: .9;
  box-shadow: 0 6px 28px rgba(0,229,255,.38);
}

.btn-generate:active { transform: scale(.98); }

/* ── ALERT ──────────────────────────────── */
.alert-custom {
  background: rgba(255,77,109,.1);
  border: 1px solid rgba(255,77,109,.35);
  border-radius: 10px;
  color: #ff8ca3;
  font-size: .85rem;
  padding: .85rem 1rem;
  margin-bottom: 1rem;
}

/* ── FOOTER ─────────────────────────────── */
.page-footer {
  position: relative; z-index: 1;
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: .65rem;
  color: var(--muted);
  letter-spacing: .08em;
  text-transform: uppercase;
  text-align: center;
}

/* ── COPY TOAST ─────────────────────────── */
#copyToast {
  position: fixed;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface-2);
  border: 1px solid var(--accent-dim);
  color: var(--accent);
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .08em;
  padding: .6rem 1.4rem;
  border-radius: 99px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s;
  z-index: 999;
}

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

/* ── RESPONSIVE ─────────────────────────── */
@media (max-width: 480px) {
  .toggle-grid      { grid-template-columns: 1fr; }
  .card-body-inner  { padding: 1.5rem 1.2rem; }
}