/* ==========================================================================
   converting.kz — styles.css
   ========================================================================== */

:root {
  --bg: #f8fafc;
  --bg-elevated: #ffffff;
  --bg-muted: #f1f5f9;
  --bg-soft: rgba(255, 255, 255, 0.8);
  --text: #0f172a;
  --text-strong: #020617;
  --text-muted: #475569;
  --line: #dbe4f0;
  --line-strong: #cbd5e1;
  --brand: #0f766e;
  --brand-2: #2563eb;
  --brand-3: #0ea5e9;
  --success: #047857;
  --warning: #b45309;
  --danger: #b91c1c;
  --shadow-sm: 0 6px 16px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 16px 40px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 32px 64px rgba(15, 23, 42, 0.12);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --container: 1440px;
  --header-height: 78px;
  --content-gap: clamp(1.25rem, 2vw, 2rem);
  --transition-fast: 180ms ease;
  --transition-base: 240ms ease;
  --transition-slow: 360ms ease;
  --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.18);
  --source-border: rgba(15, 118, 110, 0.36);
  --source-bg: rgba(20, 184, 166, 0.08);
  --highlight-border: rgba(37, 99, 235, 0.34);
  --highlight-bg: rgba(37, 99, 235, 0.08);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0b1220;
  --bg-elevated: #101a2d;
  --bg-muted: #0f172a;
  --bg-soft: rgba(16, 26, 45, 0.84);
  --text: #e2e8f0;
  --text-strong: #f8fafc;
  --text-muted: #94a3b8;
  --line: rgba(148, 163, 184, 0.18);
  --line-strong: rgba(148, 163, 184, 0.26);
  --brand: #14b8a6;
  --brand-2: #60a5fa;
  --brand-3: #38bdf8;
  --success: #34d399;
  --warning: #f59e0b;
  --danger: #f87171;
  --shadow-sm: 0 8px 18px rgba(2, 6, 23, 0.25);
  --shadow-md: 0 18px 42px rgba(2, 6, 23, 0.34);
  --shadow-lg: 0 34px 68px rgba(2, 6, 23, 0.44);
  --focus-ring: 0 0 0 3px rgba(96, 165, 250, 0.24);
  --source-border: rgba(52, 211, 153, 0.42);
  --source-bg: rgba(20, 184, 166, 0.12);
  --highlight-border: rgba(96, 165, 250, 0.42);
  --highlight-bg: rgba(37, 99, 235, 0.14);
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.08), transparent 24rem),
    radial-gradient(circle at top right, rgba(20, 184, 166, 0.08), transparent 28rem),
    var(--bg);
  color: var(--text);
  font: 400 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

button,
select {
  text-transform: none;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
ul,
ol {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

summary {
  cursor: pointer;
}

strong {
  font-weight: 700;
  color: var(--text-strong);
}

::selection {
  background: rgba(14, 165, 233, 0.18);
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-strong);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  transform: translateY(-180%);
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.section {
  padding-block: clamp(3rem, 6vw, 6.5rem);
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.section--muted {
  background: linear-gradient(180deg, transparent, rgba(148, 163, 184, 0.06) 12%, transparent);
}

.section-heading {
  display: grid;
  gap: 0.9rem;
  max-width: 900px;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.section-heading--compact {
  margin-bottom: 1.25rem;
}

.section-heading__eyebrow {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 0.5rem;
  padding: 0.38rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--brand-2);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.section-heading__title {
  margin: 0;
  color: var(--text-strong);
  font-size: clamp(1.75rem, 1.1rem + 2.2vw, 3rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.section-heading__description {
  color: var(--text-muted);
  max-width: 72ch;
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  text-wrap: pretty;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  backdrop-filter: blur(14px);
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}

.brand__mark {
  display: inline-grid;
  place-items: center;
  inline-size: 2.75rem;
  block-size: 2.75rem;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(14, 165, 233, 0.18), rgba(20, 184, 166, 0.18)),
    var(--bg-elevated);
  border: 1px solid var(--line);
  color: var(--brand);
  font-size: 1.1rem;
  font-weight: 900;
  box-shadow: var(--shadow-sm);
}

.brand__text {
  display: grid;
  min-width: 0;
}

.brand__title {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-strong);
}

.brand__subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.3;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  justify-self: center;
  flex-wrap: wrap;
}

.site-nav__link {
  padding: 0.7rem 1rem;
  border-radius: 999px;
  color: var(--text-muted);
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  background: var(--bg-elevated);
  color: var(--text-strong);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-height: 2.875rem;
  padding: 0.7rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.theme-toggle__icon {
  inline-size: 1rem;
  block-size: 1rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.18) 32%, transparent 34%),
    linear-gradient(135deg, var(--brand-2), var(--brand));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.24);
}

.theme-toggle__label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-strong);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: max(70svh, 720px);
  display: grid;
  align-items: center;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  pointer-events: none;
  inset: auto;
  border-radius: 999px;
  filter: blur(40px);
  opacity: 0.45;
}

.hero::before {
  inset-inline-start: -10rem;
  inset-block-start: 8rem;
  inline-size: 24rem;
  block-size: 24rem;
  background: rgba(14, 165, 233, 0.18);
}

.hero::after {
  inset-inline-end: -8rem;
  inset-block-end: 2rem;
  inline-size: 22rem;
  block-size: 22rem;
  background: rgba(20, 184, 166, 0.18);
}

.hero__grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2rem);
  align-items: start;
}

.hero__content {
  display: grid;
  gap: 1.2rem;
  align-self: center;
}

.hero__title {
  margin: 0;
  max-width: 18ch;
  color: var(--text-strong);
  font-size: clamp(2.4rem, 1.5rem + 3.4vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.hero__lead {
  max-width: 62ch;
  color: var(--text-muted);
  font-size: clamp(1.06rem, 0.96rem + 0.38vw, 1.25rem);
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 0.25rem;
}

.hero__microcopy {
  color: var(--text-muted);
  max-width: 60ch;
  font-size: 0.95rem;
}

.hero__panel {
  position: relative;
}

.search-panel {
  display: grid;
  gap: 1.15rem;
  padding: clamp(1.25rem, 2vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.86)),
    var(--bg-elevated);
  box-shadow: var(--shadow-lg);
}

:root[data-theme="dark"] .search-panel {
  background:
    linear-gradient(180deg, rgba(16, 26, 45, 0.82), rgba(16, 26, 45, 0.94)),
    var(--bg-elevated);
}

.search-panel__actions {
  display: grid;
  gap: 0.75rem;
}

.search-panel__summary {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  list-style: none;
  margin-top: 0.35rem;
}

.hero-stats__item {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg-soft);
  box-shadow: var(--shadow-sm);
  min-height: 100%;
}

.hero-stats__item strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: clamp(1.35rem, 1.1rem + 0.6vw, 1.65rem);
  line-height: 1.1;
}

.hero-stats__item span {
  color: var(--text-muted);
  font-size: 0.94rem;
}

.button {
  --button-bg: var(--bg-elevated);
  --button-color: var(--text-strong);
  --button-border: var(--line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 3rem;
  padding: 0.85rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--button-border);
  background: var(--button-bg);
  color: var(--button-color);
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.button--primary {
  --button-bg: linear-gradient(135deg, var(--brand-2), var(--brand));
  --button-color: #ffffff;
  --button-border: transparent;
}

.button--ghost {
  background: var(--bg-elevated);
}

.field {
  display: grid;
  gap: 0.55rem;
}

.field--search {
  gap: 0.7rem;
}

.field__label {
  color: var(--text-strong);
  font-size: 0.95rem;
  font-weight: 700;
}

.field__control {
  inline-size: 100%;
  min-block-size: 3.35rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg-elevated);
  color: var(--text-strong);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
  appearance: none;
}

.field__control:hover {
  border-color: var(--line-strong);
}

.field__control[aria-invalid="true"] {
  border-color: var(--danger);
}

.field__control::placeholder {
  color: transparent;
}

.field__control--select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-muted) 50%),
    linear-gradient(135deg, var(--text-muted) 50%, transparent 50%);
  background-position:
    calc(100% - 1.15rem) calc(50% - 0.15rem),
    calc(100% - 0.8rem) calc(50% - 0.15rem);
  background-size: 0.4rem 0.4rem, 0.4rem 0.4rem;
  background-repeat: no-repeat;
  padding-right: 2.75rem;
}

.feature-grid,
.steps-grid,
.converters-grid {
  display: grid;
  gap: var(--content-gap);
}

.feature-card,
.step-card,
.converter-card,
.faq-item,
.topic-nav,
.hero-stats__item,
.search-panel {
  border-color: var(--line);
}

.feature-card,
.step-card {
  min-height: 100%;
  padding: clamp(1.15rem, 2vw, 1.35rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}

.feature-card__title,
.step-card__title {
  margin: 0 0 0.55rem;
  color: var(--text-strong);
  font-size: 1.1rem;
  line-height: 1.25;
}

.feature-card__text,
.step-card__text {
  color: var(--text-muted);
}

.steps-grid {
  list-style: none;
  counter-reset: steps;
}

.step-card {
  position: relative;
  overflow: hidden;
}

.step-card__number {
  display: inline-grid;
  place-items: center;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  margin-bottom: 1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(20, 184, 166, 0.18));
  color: var(--brand-2);
  font-weight: 800;
}

.topic-nav-wrap {
  position: sticky;
  top: var(--header-height);
  z-index: 80;
  padding-block: 1rem;
  backdrop-filter: blur(14px);
  background: var(--bg-soft);
  border-block: 1px solid var(--line);
}

.topic-nav {
  display: flex;
  gap: 0.65rem;
  overflow-x: auto;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  scrollbar-width: thin;
}

.topic-nav__link {
  flex: 0 0 auto;
  padding: 0.72rem 1rem;
  border-radius: 999px;
  color: var(--text-muted);
  font-weight: 700;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.topic-nav__link:hover,
.topic-nav__link:focus-visible {
  background: var(--bg-elevated);
  color: var(--text-strong);
  transform: translateY(-1px);
}

.empty-state {
  margin-bottom: 1rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px dashed var(--line-strong);
  background: var(--bg-soft);
  color: var(--text-muted);
}

.converter-card {
  display: grid;
  gap: 1rem;
  padding: clamp(1.15rem, 1.6vw, 1.45rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.28), transparent 32%),
    var(--bg-elevated);
  box-shadow: var(--shadow-md);
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base),
    opacity var(--transition-base);
}

.converter-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.converter-card.is-hidden {
  opacity: 0;
  transform: scale(0.985);
  pointer-events: none;
}

.converter-card.is-flash {
  animation: flash-card 900ms ease;
}

@keyframes flash-card {
  0%,
  100% { border-color: var(--line); }
  40% { border-color: var(--highlight-border); }
}

.converter-card__header {
  display: grid;
  gap: 0.65rem;
}

.converter-card__eyebrow {
  margin: 0;
  color: var(--brand-2);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.converter-card__title {
  margin: 0;
  color: var(--text-strong);
  font-size: clamp(1.2rem, 1rem + 0.5vw, 1.45rem);
  line-height: 1.2;
  text-wrap: balance;
}

.converter-card__description {
  color: var(--text-muted);
}

.converter-card__controls {
  display: grid;
  gap: 0.9rem;
}

.converter-card__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.quick-pairs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.query-chip,
.quick-pair {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-strong);
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.query-chip:hover,
.query-chip:focus-visible,
.quick-pair:hover,
.quick-pair:focus-visible {
  transform: translateY(-1px);
  border-color: var(--line-strong);
  background: var(--bg-elevated);
}

.quick-pair.is-active,
.query-chip.is-active {
  border-color: var(--highlight-border);
  background: linear-gradient(135deg, var(--highlight-bg), var(--source-bg));
}

.popular-queries {
  display: grid;
  gap: 0.8rem;
}

.popular-queries__title {
  margin: 0;
  color: var(--text-strong);
  font-size: 1rem;
  line-height: 1.3;
}

.popular-queries__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.converter-card__summary {
  min-height: 1.6em;
  color: var(--text-strong);
  font-weight: 600;
}

.converter-card__note {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 10.25rem), 1fr));
  gap: 0.8rem;
}

.result-card {
  position: relative;
  display: grid;
  gap: 0.55rem;
  min-height: 9rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  text-align: left;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.result-card:hover,
.result-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}

.result-card.is-source {
  border-color: var(--source-border);
  background: linear-gradient(180deg, var(--source-bg), var(--bg-elevated));
}

.result-card.is-highlighted {
  border-color: var(--highlight-border);
  background: linear-gradient(180deg, var(--highlight-bg), var(--bg-elevated));
}

.result-card__top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 0.75rem;
}

.result-card__label {
  color: var(--text-strong);
  font-weight: 700;
  line-height: 1.3;
}

.result-card__symbol {
  flex: 0 0 auto;
  padding: 0.22rem 0.5rem;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 800;
}

.result-card__value {
  color: var(--text-strong);
  font-size: clamp(1.05rem, 0.96rem + 0.25vw, 1.2rem);
  line-height: 1.25;
  font-weight: 800;
  word-break: break-word;
}

.result-card__meta {
  margin-top: auto;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.faq-list {
  display: grid;
  gap: 0.9rem;
}

.faq-item {
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}

.faq-item[open] {
  border-color: var(--line-strong);
}

.faq-item__question {
  position: relative;
  list-style: none;
  padding: 1.15rem 3.2rem 1.15rem 1.15rem;
  color: var(--text-strong);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.35;
}

.faq-item__question::-webkit-details-marker {
  display: none;
}

.faq-item__question::after {
  content: "+";
  position: absolute;
  inset-inline-end: 1.15rem;
  inset-block-start: 50%;
  transform: translateY(-50%);
  color: var(--brand-2);
  font-size: 1.35rem;
  font-weight: 700;
}

.faq-item[open] .faq-item__question::after {
  content: "–";
}

.faq-item__answer {
  padding: 0 1.15rem 1.15rem;
  color: var(--text-muted);
}

.site-footer {
  padding-block: 2.25rem calc(2.5rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: var(--bg-muted);
}

.site-footer__inner {
  display: grid;
  gap: 1.25rem;
}

.site-footer__title {
  margin-bottom: 0.45rem;
  color: var(--text-strong);
  font-size: 1.1rem;
  font-weight: 800;
}

.site-footer__text,
.site-footer__meta {
  color: var(--text-muted);
}

.site-footer__meta {
  display: grid;
  gap: 0.35rem;
}

.toast {
  position: fixed;
  inset-inline-end: 1rem;
  inset-block-end: 1rem;
  z-index: 150;
  max-width: min(92vw, 26rem);
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: var(--text-strong);
  color: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(1rem);
  pointer-events: none;
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast);
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.noscript-banner {
  position: fixed;
  inset-inline: 1rem;
  inset-block-end: 1rem;
  z-index: 160;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  color: var(--text-strong);
  box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   Responsive layout
   ========================================================================== */

@media (min-width: 480px) {
  .container {
    width: min(100% - 2.25rem, var(--container));
  }

  .hero-stats {
    gap: 1rem;
  }

  .results-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
  }
}

@media (min-width: 640px) {
  .feature-grid,
  .steps-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .converter-card__controls {
    grid-template-columns: 1.2fr 1fr auto;
    align-items: end;
  }

  .converter-card__buttons {
    justify-content: flex-end;
  }
}

@media (min-width: 768px) {
  .container {
    width: min(100% - 2.75rem, var(--container));
  }

  .hero__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.95fr);
    gap: clamp(1.5rem, 2.5vw, 2.5rem);
  }

  .site-footer__inner {
    grid-template-columns: 1.25fr 0.95fr;
    align-items: start;
  }

  .steps-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .container {
    width: min(100% - 3.5rem, var(--container));
  }

  .feature-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .converters-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .results-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .site-nav {
    gap: 0.65rem;
  }
}

@media (min-width: 1280px) {
  .hero {
    min-height: max(78svh, 820px);
  }

  .converter-card {
    padding: 1.45rem;
  }

  .results-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1440px) {
  .container {
    width: min(100% - 4rem, var(--container));
  }
}

@media (min-width: 1920px) {
  :root {
    --container: 1600px;
  }

  .hero__title {
    max-width: 16ch;
  }
}

@media (max-width: 1023.98px) {
  .topic-nav-wrap {
    top: calc(var(--header-height) - 1px);
  }
}

@media (max-width: 767.98px) {
  .site-header__inner {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand theme"
      "nav nav";
    padding-block: 0.8rem;
  }

  .brand {
    grid-area: brand;
  }

  .site-nav {
    grid-area: nav;
    justify-self: start;
    overflow-x: auto;
    max-width: 100%;
    padding-bottom: 0.15rem;
  }

  .theme-toggle {
    grid-area: theme;
    justify-self: end;
  }

  .hero {
    min-height: auto;
  }

  .hero__title {
    max-width: 100%;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .topic-nav-wrap {
    position: sticky;
  }
}

@media (max-width: 639.98px) {
  .container {
    width: min(100% - 1rem, var(--container));
  }

  .section {
    padding-block: 2.5rem;
  }

  .site-header__inner {
    gap: 0.75rem;
  }

  .brand__subtitle {
    display: none;
  }

  .theme-toggle__label {
    display: none;
  }

  .theme-toggle {
    padding-inline: 0.85rem;
  }

  .site-nav__link,
  .topic-nav__link,
  .query-chip,
  .quick-pair {
    min-height: 2.75rem;
  }

  .field__control,
  .button {
    min-height: 3.15rem;
  }

  .converter-card__buttons {
    width: 100%;
  }

  .converter-card__buttons .button {
    width: 100%;
  }

  .faq-item__question {
    padding-inline-end: 2.9rem;
  }
}

@media (max-width: 379.98px) {
  .brand__title {
    font-size: 0.98rem;
  }

  .hero__actions,
  .quick-pairs,
  .popular-queries__list {
    gap: 0.55rem;
  }

  .button,
  .query-chip,
  .quick-pair {
    width: 100%;
  }

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

/* Height-sensitive adjustments for compact landscape devices */
@media (max-height: 760px) and (orientation: landscape) {
  .hero {
    min-height: auto;
  }

  .section {
    padding-block: 2.5rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}