:root {
  --bg: #080808;
  --panel: #111111;
  --panel-2: #171717;
  --text: #f7f7f7;
  --muted: #a1a1a1;
  --line: #303030;
  --yellow: #ffcb0e;
  --yellow-soft: rgba(255, 203, 14, 0.12);
  --danger: #ff5d5d;
  --success: #45d483;
  --radius: 8px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

html[data-theme="light"] {
  --bg: #f1f1f1;
  --panel: #ffffff;
  --panel-2: #f7f7f7;
  --text: #0a0a0a;
  --muted: #646464;
  --line: #d8d8d8;
  --yellow-soft: rgba(255, 203, 14, 0.18);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

html[data-theme="light"] {
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Poppins, Inter, "Segoe UI", Arial, sans-serif;
  line-height: 1.5;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.background-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
}

html[data-theme="light"] .background-grid {
  background-image:
    linear-gradient(rgba(0,0,0,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.035) 1px, transparent 1px);
}

.app-shell {
  position: relative;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 54px;
  height: 42px;
  border: 2px solid var(--yellow);
  border-radius: var(--radius);
  background: #000;
  color: var(--yellow);
  font-weight: 900;
  letter-spacing: 0.05em;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-text strong {
  font-size: 0.98rem;
  line-height: 1.2;
}

.brand-text small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.76rem;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  font-size: 1.25rem;
}

.icon-button:hover {
  border-color: var(--yellow);
}

.hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  padding: 58px 0 26px;
}

.hero > div:first-child {
  max-width: 790px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--yellow);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 5vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.hero-copy {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 0.82rem;
}

.privacy-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 5px rgba(69, 212, 131, 0.12);
}

.generator-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.mode-tabs {
  display: flex;
  width: fit-content;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-2);
}

.mode-tab {
  padding: 10px 16px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
}

.mode-tab.active {
  background: var(--yellow);
  color: #000;
}

.result-panel {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
}

.result-heading,
.result-meta,
.control-heading,
.action-row,
.multiple-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.result-heading {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.82rem;
}

.strength-label {
  color: var(--success);
  font-weight: 800;
}

.result-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
}

#resultOutput {
  width: 100%;
  min-height: 82px;
  resize: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  outline: none;
  background: var(--panel);
  color: var(--text);
  padding: 14px;
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: clamp(1rem, 2.5vw, 1.28rem);
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

#resultOutput:focus {
  border-color: var(--yellow);
  box-shadow: 0 0 0 3px var(--yellow-soft);
}

.primary-button,
.secondary-button {
  min-height: 46px;
  border-radius: var(--radius);
  padding: 11px 17px;
  font-weight: 800;
  transition: transform 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.primary-button {
  border: 1px solid var(--yellow);
  background: var(--yellow);
  color: #000;
}

.secondary-button {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
}

.primary-button:hover,
.secondary-button:hover,
.icon-button:hover {
  transform: translateY(-1px);
}

.secondary-button:hover {
  border-color: var(--yellow);
}

.copy-button {
  min-width: 112px;
}

.strength-track {
  height: 7px;
  margin-top: 14px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--line);
}

.strength-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--success);
  transition: width 0.22s ease, background 0.22s ease;
}

.result-meta {
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.75rem;
}

.options-panel {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

.hidden {
  display: none !important;
}

.control-group {
  display: grid;
  gap: 10px;
}

.control-group label,
.control-heading label {
  font-weight: 800;
}

.number-control {
  display: grid;
  grid-template-columns: 38px 68px 38px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.number-control button,
.number-control input {
  height: 38px;
  border: 0;
  background: var(--panel-2);
  color: var(--text);
  text-align: center;
}

.number-control button:hover {
  background: var(--yellow);
  color: #000;
}

.number-control input {
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  -moz-appearance: textfield;
}

.number-control input::-webkit-outer-spin-button,
.number-control input::-webkit-inner-spin-button {
  margin: 0;
  -webkit-appearance: none;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--yellow);
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.option-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 74px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
  cursor: pointer;
}

.option-card:hover {
  border-color: var(--yellow);
}

.option-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.option-card span:last-child {
  display: flex;
  flex-direction: column;
}

.option-card small,
.switch-row small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.74rem;
}

.fake-checkbox {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: 2px solid var(--muted);
  border-radius: 5px;
}

.option-card input:checked + .fake-checkbox {
  border-color: var(--yellow);
  background: var(--yellow);
}

.option-card input:checked + .fake-checkbox::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: solid #000;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.secondary-options {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 16px;
  background: var(--panel-2);
}

.switch-row + .switch-row {
  border-top: 1px solid var(--line);
}

.switch-row > span:first-child {
  display: flex;
  flex-direction: column;
}

.switch {
  position: relative;
  flex: 0 0 auto;
  width: 50px;
  height: 28px;
}

.switch input {
  position: absolute;
  opacity: 0;
}

.switch-slider {
  position: absolute;
  inset: 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #343434;
  transition: 0.2s ease;
}

.switch-slider::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  transition: 0.2s ease;
}

.switch input:checked + .switch-slider {
  border-color: var(--yellow);
  background: var(--yellow);
}

.switch input:checked + .switch-slider::after {
  transform: translateX(22px);
  background: #000;
}

.compact {
  gap: 7px;
}

.text-input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  outline: none;
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 12px;
}

.text-input:focus {
  border-color: var(--yellow);
  box-shadow: 0 0 0 3px var(--yellow-soft);
}

.passphrase-grid {
  grid-template-columns: repeat(2, 1fr);
}

.action-row {
  justify-content: flex-start;
  margin-top: 24px;
}

.generate-button {
  min-width: 180px;
}

.multiple-panel {
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.multiple-heading h2 {
  margin: 0;
  font-size: 1.2rem;
}

.small-button {
  min-height: 38px;
  padding: 8px 12px;
  font-size: 0.8rem;
}

.multiple-results {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.result-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
}

.result-item code {
  overflow-wrap: anywhere;
  color: var(--text);
  font-size: 0.9rem;
}

.result-item button {
  border: 0;
  background: transparent;
  color: var(--yellow);
  font-weight: 800;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.info-grid article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.info-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 15px;
  border-radius: var(--radius);
  background: var(--yellow-soft);
  color: var(--yellow);
  font-weight: 900;
}

.info-grid h2 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.info-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.info-grid code {
  color: var(--text);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 4px 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  z-index: 50;
  max-width: calc(100% - 32px);
  padding: 11px 15px;
  border: 1px solid var(--yellow);
  border-radius: var(--radius);
  background: #000;
  color: #fff;
  font-weight: 700;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 18px);
  transition: 0.2s ease;
}

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

@media (max-width: 800px) {
  .hero {
    align-items: start;
    flex-direction: column;
    padding-top: 36px;
  }

  .option-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .app-shell {
    width: min(100% - 20px, 1120px);
    padding-top: 12px;
  }

  .brand-text small {
    display: none;
  }

  .hero {
    padding-top: 28px;
  }

  h1 {
    font-size: clamp(2rem, 11vw, 3.1rem);
  }

  .generator-card {
    padding: 14px;
    border-radius: 10px;
  }

  .result-row {
    grid-template-columns: 1fr;
  }

  .copy-button {
    width: 100%;
  }

  .result-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
  }

  .option-grid,
  .passphrase-grid {
    grid-template-columns: 1fr;
  }

  .control-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .switch-row {
    align-items: flex-start;
  }

  .switch {
    margin-top: 4px;
  }

  .action-row {
    align-items: stretch;
    flex-direction: column;
  }

  .generate-button {
    width: 100%;
  }

  footer {
    flex-direction: column;
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}