/* SPDX-License-Identifier: MIT */
/* Copyright (C) 2026 Abhishek Sengar */

.learn-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(48px, 7vw, 88px);
  overflow: hidden;
}

.learn-hero::before {
  content: '';
  position: absolute;
  inset: -140px 0 0;
  z-index: -1;
  background: radial-gradient(50% 60% at 85% 20%, rgb(13 148 136 / 0.16), transparent 70%), radial-gradient(40% 50% at 8% 12%, rgb(99 102 241 / 0.1), transparent 70%);
}

.learn-hero-grid {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}

@media (min-width: 1000px) {
  .learn-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.learn-hero-copy {
  display: grid;
  justify-items: start;
  gap: 16px;
}

.learn-hero-copy .breadcrumbs {
  margin-bottom: 4px;
}

.learn-hero-copy h1 {
  font-size: clamp(44px, 6.4vw, 76px);
  font-weight: 800;
  letter-spacing: -0.045em;
}

.learn-tagline {
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--display-font);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.learn-lead {
  max-width: 38em;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 17px;
}

.support-key {
  display: grid;
  gap: 14px;
  padding: 24px;
}

.support-key h2 {
  font-size: 22px;
  font-weight: 700;
}

.support-key p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.support-key ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.support-key li {
  display: grid;
  gap: 4px;
  font-size: 14px;
  color: var(--ink-soft);
}

.start-here li {
  display: block;
}

.start-here strong {
  display: block;
  color: var(--ink);
}

.support-key a {
  color: var(--tool-color);
  font-weight: 600;
}

.support-badge {
  justify-self: start;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.is-widely .support-badge {
  background: #dcfce7;
  color: #166534;
}

.is-newly .support-badge {
  background: #dbeafe;
  color: #1e40af;
}

.is-limited .support-badge {
  background: #fef3c7;
  color: #92400e;
}

.feature-index {
  display: grid;
  gap: 18px;
}

@media (min-width: 860px) {
  .feature-index {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-index-group {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 20px;
}

.feature-index-group h3 {
  font-size: 18px;
}

.feature-index-group ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-index-group a {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-sunken);
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}

.feature-index-group a:hover {
  background: var(--tool-soft);
  color: var(--ink);
}

.topic + .topic {
  margin-top: clamp(56px, 8vw, 96px);
}

.topic-head {
  display: grid;
  gap: 10px;
  max-width: 720px;
  margin-bottom: 28px;
}

.topic-head h2 {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 800;
}

.topic-head p {
  margin: 0;
  color: var(--muted);
}

.feature-docs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 520px), 1fr));
  gap: 20px;
}

.feature-doc {
  display: grid;
  align-content: start;
  gap: 16px;
  min-width: 0;
  padding: clamp(20px, 3vw, 28px);
  scroll-margin-top: 104px;
}

.feature-doc-head {
  display: grid;
  gap: 8px;
}

.feature-doc-head h3 {
  font-size: 24px;
  font-weight: 700;
}

.feature-doc > p {
  margin: 0;
  color: var(--ink-soft);
}

.support {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.feature-doc .code-window {
  border-radius: 14px;
  box-shadow: none;
}

.feature-doc .code-window pre {
  padding: 16px;
  font-size: 13px;
}

.feature-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  font-weight: 600;
}

.feature-links a {
  color: var(--tool-color);
  text-decoration: none;
}

.feature-links a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.demo-stage {
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px dashed var(--line-strong);
  border-radius: 14px;
  background: var(--page);
}

.demo-caption {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.demo-fallback {
  display: none;
  margin: 0;
  color: #92400e;
  font-size: 13px;
  font-weight: 600;
}

.demo-resizable {
  container-type: inline-size;
  width: 100%;
  min-width: 220px;
  max-width: 100%;
  padding: 12px;
  overflow: auto;
  resize: horizontal;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.demo-media-card {
  display: grid;
  gap: 12px;
}

.demo-media-card p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.demo-media-thumb {
  min-height: 72px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--learn), var(--vektor));
}

@container (min-width: 380px) {
  .demo-media-card {
    grid-template-columns: 120px 1fr;
    align-items: center;
  }
}

.demo-has-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.demo-has-card input {
  width: 18px;
  height: 18px;
  accent-color: var(--learn);
}

.demo-has-card:has(input:checked) {
  border-color: var(--learn);
  background: var(--learn-soft);
}

.demo-has-card:has(input:checked) .demo-has-state::after {
  content: 'On';
}

.demo-has-state {
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
}

.demo-has-state::after {
  content: 'Off';
}

.demo-swatches {
  --demo-brand: oklch(0.6 0.15 185);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.demo-swatches li {
  display: grid;
  align-items: end;
  min-height: 64px;
  padding: 6px;
  border-radius: 10px;
  color: #ffffff;
  font: 600 11px/1.2 var(--mono-font);
  text-shadow: 0 1px 2px rgb(0 0 0 / 0.4);
}

.demo-scheme {
  color-scheme: light;
  display: grid;
  gap: 8px;
  padding: 16px;
  border: 1px solid light-dark(#e4e6ee, #2e3348);
  border-radius: 12px;
  background: light-dark(#ffffff, #12141f);
  color: light-dark(#0d0f1a, #e8eaf3);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.demo-scheme:has(input:checked) {
  color-scheme: dark;
}

.demo-scheme label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  cursor: pointer;
}

.demo-scheme p {
  margin: 0;
  color: light-dark(#5b6176, #a3a9c0);
  font-size: 14px;
}

.demo-wrap-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.demo-wrap-compare div {
  padding: 12px;
  border-radius: 10px;
  background: var(--surface);
}

.demo-wrap-compare small {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font: 600 11px/1 var(--mono-font);
}

.demo-wrap-compare h4 {
  font-size: 19px;
  font-weight: 700;
  text-wrap: wrap;
}

.demo-wrap-compare .is-balanced h4 {
  text-wrap: balance;
}

.demo-popover-trigger {
  justify-self: start;
}

.demo-popover {
  position: fixed;
  inset: auto;
  width: 280px;
  max-width: calc(100vw - 24px);
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-lifted);
  color: var(--ink);
  font-size: 14px;
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.25s ease, transform 0.25s ease, overlay 0.25s ease allow-discrete, display 0.25s ease allow-discrete;
}

.demo-popover:not(:popover-open) {
  opacity: 0;
  transform: translateY(-6px) scale(0.97);
}

@starting-style {
  .demo-popover:popover-open {
    opacity: 0;
    transform: translateY(-6px) scale(0.97);
  }
}

.demo-popover p {
  margin: 0;
}

@property --demo-angle {
  syntax: '<angle>';
  inherits: false;
  initial-value: 0deg;
}

.demo-gradient-ring {
  justify-self: center;
  display: grid;
  place-items: center;
  width: 150px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(from var(--demo-angle), var(--learn), var(--vektor), #f59e0b, var(--learn));
  animation: demo-spin 4s linear infinite;
}

.demo-gradient-ring span {
  display: grid;
  place-items: center;
  width: 118px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--surface);
  font: 700 13px/1.2 var(--mono-font);
  text-align: center;
}

@keyframes demo-spin {
  to {
    --demo-angle: 360deg;
  }
}

.demo-scroll-box {
  height: 180px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.demo-scroll-progress {
  position: sticky;
  top: 0;
  height: 6px;
  background: var(--learn);
  transform-origin: left;
  animation: demo-grow linear both;
  animation-timeline: scroll();
}

.demo-scroll-box p {
  margin: 0;
  padding: 12px 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

@keyframes demo-grow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

.demo-orbit {
  --orbit-radius: 58px;
  position: relative;
  justify-self: center;
  width: 150px;
  aspect-ratio: 1;
  margin: 0;
  padding: 0;
  list-style: none;
}

.demo-orbit li {
  --angle: calc(var(--step) * 45deg);
  position: absolute;
  top: calc(50% - 9px + sin(var(--angle)) * var(--orbit-radius));
  left: calc(50% - 9px + cos(var(--angle)) * var(--orbit-radius));
  width: 18px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: oklch(0.65 0.15 calc(var(--step) * 45));
}

.demo-stagger {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.demo-stagger li {
  height: 14px;
  width: 30%;
  border-radius: 999px;
  background: var(--learn);
}

@supports (width: calc(1px * sibling-index())) {
  .demo-stagger li {
    width: calc(sibling-index() * 15%);
    opacity: calc(0.3 + sibling-index() * 0.12);
  }
}

@supports not (width: calc(1px * sibling-index())) {
  .is-sibling-demo .demo-fallback {
    display: block;
  }
}

.demo-field {
  justify-self: start;
  min-width: 10ch;
  max-width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface);
  font: 500 15px/1.4 var(--body-font);
  field-sizing: content;
}

@supports not (field-sizing: content) {
  .is-field-demo .demo-fallback {
    display: block;
  }
}

@supports not (animation-timeline: scroll()) {
  .is-scroll-demo .demo-fallback {
    display: block;
  }

  .demo-scroll-progress {
    transform: scaleX(0.35);
  }
}

@media (prefers-reduced-motion: reduce) {
  .demo-gradient-ring {
    animation: none;
  }
}

.horizon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
  gap: 16px;
}

.horizon-grid .feature-doc {
  gap: 12px;
  padding: 20px;
}

.horizon-grid .feature-doc-head h3 {
  font-size: 20px;
}

.horizon-grid .feature-doc > p {
  font-size: 15px;
}

.resource-group + .resource-group {
  margin-top: clamp(48px, 7vw, 80px);
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.resource-card {
  position: relative;
  display: grid;
  align-content: start;
  gap: 6px;
  height: 100%;
  padding: 20px 44px 20px 20px;
  color: inherit;
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.resource-card:hover {
  transform: translateY(-3px);
  border-color: var(--tool-color);
}

.resource-source {
  color: var(--tool-color);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.resource-card strong {
  font-family: var(--display-font);
  font-size: 19px;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.resource-card small {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.resource-arrow {
  position: absolute;
  top: 18px;
  right: 18px;
  color: var(--tool-color);
  font-size: 18px;
  font-weight: 700;
}

.page-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-jump a {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.page-jump a:hover {
  border-color: var(--tool-color);
  color: var(--ink);
}