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

:root {
  --bg:        #0c0c10;
  --surface:   #141419;
  --surface2:  #1c1c24;
  --border:    #2a2a36;
  --border-hi: #3d3d50;
  --text:      #e2e0ef;
  --text-dim:  #7a7890;
  --accent:    #6ee7b7;
  --accent2:   #34d399;
  --accent-bg: rgba(110, 231, 183, 0.08);
  --danger:    #f87171;
  --warn:      #fbbf24;
  --mono:      'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --sans:      'Space Grotesk', system-ui, -apple-system, sans-serif;
  --radius:    10px;
}

html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--surface2);
  padding: 1px 5px;
  border-radius: 4px;
  color: var(--accent);
}

/* ── App Shell ── */
.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

/* ── Header ── */
.header {
  text-align: center;
  margin-bottom: 40px;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
}

.logo-icon {
  font-size: 32px;
  filter: drop-shadow(0 0 12px rgba(110, 231, 183, 0.4));
}

.logo h1 {
  font-family: var(--mono);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent), #a7f3d0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  color: var(--text-dim);
  font-size: 0.9rem;
  letter-spacing: 0.3px;
}

/* ── Output Panel ── */
.output-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

.output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.output-label {
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.strength-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--surface2);
  border: 1px solid var(--border);
}

.strength-dots {
  display: flex;
  gap: 3px;
}

.strength-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.3s;
}
.strength-dot.on { background: var(--accent); }
.strength-dot.warn { background: var(--warn); }
.strength-dot.bad { background: var(--danger); }

.output-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  min-height: 80px;
  font-family: var(--mono);
  font-size: 0.92rem;
  line-height: 1.9;
  overflow-x: auto;
}

.output-placeholder {
  color: var(--text-dim);
  font-family: var(--sans);
  font-style: italic;
  text-align: center;
  padding: 12px 0;
}

.password-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 6px 8px;
  border-radius: 6px;
  transition: background 0.15s;
  cursor: pointer;
  word-break: break-all;
}

.password-row:hover {
  background: var(--accent-bg);
}

.password-text {
  flex: 1;
  user-select: all;
}

.password-text .ch-upper  { color: #93c5fd; }
.password-text .ch-lower  { color: var(--text); }
.password-text .ch-number { color: var(--accent); }
.password-text .ch-symbol { color: var(--warn); }

.copy-btn {
  flex-shrink: 0;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  font-family: var(--sans);
  font-size: 0.75rem;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.copy-btn.copied {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
}

.output-meta {
  display: flex;
  gap: 20px;
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--mono);
}

.output-error {
  color: var(--danger);
  text-align: center;
  padding: 10px 0;
  font-family: var(--sans);
}

/* ── Controls Panel ── */
.controls-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
}

.control-group {
  margin-bottom: 22px;
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 10px;
  color: var(--text);
}

.control-value {
  font-family: var(--mono);
  color: var(--accent);
  background: var(--accent-bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.85rem;
}

/* ── Slider ── */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}

.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 10px rgba(110, 231, 183, 0.3);
  transition: box-shadow 0.2s;
}
.slider::-webkit-slider-thumb:hover {
  box-shadow: 0 0 18px rgba(110, 231, 183, 0.5);
}

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

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 4px;
  font-family: var(--mono);
}

/* ── Toggle Grid ── */
.toggle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.toggle-grid.single-col {
  grid-template-columns: 1fr;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--text-dim);
  transition: all 0.2s;
  user-select: none;
}

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

.toggle span {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.78rem;
  color: var(--text-dim);
  transition: color 0.2s;
}

.toggle.active {
  border-color: var(--accent);
  background: var(--accent-bg);
  color: var(--text);
}

.toggle.active span {
  color: var(--accent);
}

.toggle:hover {
  border-color: var(--border-hi);
}

/* ── Text Input ── */
.text-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.2s;
}
.text-input:focus {
  border-color: var(--accent);
}
.text-input::placeholder {
  color: var(--text-dim);
  opacity: 0.5;
}

/* ── Generate Button ── */
.generate-btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  color: var(--bg);
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
  letter-spacing: 0.5px;
  margin-top: 4px;
}
.generate-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(110, 231, 183, 0.2);
}
.generate-btn:active {
  transform: translateY(0);
}
.generate-btn .btn-icon {
  font-size: 1.1rem;
}

.generate-btn.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* ── Footer ── */
.footer {
  text-align: center;
  margin-top: 32px;
  font-size: 0.78rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ── Responsive ── */
@media (max-width: 500px) {
  .app { padding: 24px 14px 40px; }
  .toggle-grid { grid-template-columns: 1fr; }
  .output-header { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* ── Animations ── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.password-row {
  animation: fadeIn 0.25s ease both;
}