:root {
  color-scheme: light;
  --paper: #f4f2fb;
  --surface: #ffffff;
  --ink: #121b38;
  --muted: #5f6478;
  --line: #dedfeb;
  --accent: #6d4aff;
  --accent-dark: #432bb4;
  --accent-soft: #ebe7ff;
  --warm: #fff0d4;
  --blue: #2f6df6;
  --cobalt: #183fa9;
  --coral: #ff6c62;
  --violet: #7f53d8;
  --sun: #f4b83c;
  --teal: #0b9d8c;
  --lime: #bddb43;
  --navy: #111a39;
  --warning: #9a5700;
  --danger: #b42318;
  --success: #087e70;
  --radius-sm: 0.75rem;
  --radius-md: 1.25rem;
  --radius-lg: 2rem;
  --shadow: 0 1.25rem 4rem rgb(22 42 36 / 0.09);
  --page: min(72rem, calc(100% - 2rem));
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* SIMSAP 5-user website pilot */
.button-compact {
  min-height: 2.65rem;
  padding: .65rem 1rem;
  font-size: .92rem;
}

.button-danger {
  background: #8f2442;
  color: #fff;
  border-color: #8f2442;
}

.auth-page,
.admin-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 10%, rgba(102, 72, 255, .16), transparent 30rem),
    radial-gradient(circle at 90% 25%, rgba(0, 181, 173, .15), transparent 28rem),
    #f7f6ff;
}

.auth-main {
  min-height: calc(100vh - 13rem);
  display: grid;
  align-items: center;
  padding: clamp(3rem, 7vw, 7rem) 0;
}

.auth-shell,
.account-shell {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(20rem, .72fr);
  gap: clamp(2rem, 7vw, 6rem);
  align-items: start;
}

.auth-intro {
  padding: clamp(1rem, 4vw, 3rem) 0;
}

.auth-intro h1,
.account-summary h1,
.admin-auth h1 {
  max-width: 11ch;
  margin: .4rem 0 1.25rem;
  font-size: clamp(2.6rem, 5.4vw, 5.6rem);
  line-height: .98;
  letter-spacing: -.055em;
}

.auth-intro > p:not(.eyebrow),
.account-summary > p,
.admin-auth > div > p:not(.eyebrow) {
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.75;
}

.auth-form,
.account-summary,
.admin-panel,
.admin-auth {
  padding: clamp(1.5rem, 3.5vw, 2.6rem);
  border: 1px solid rgba(74, 56, 194, .16);
  border-radius: 1.7rem;
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 1.5rem 4rem rgba(35, 27, 92, .10);
}

.auth-form {
  display: grid;
  gap: 1.05rem;
}

.auth-form .field,
.admin-inline-form .field {
  display: grid;
  gap: .45rem;
}

.auth-form input,
.admin-inline-form input {
  width: 100%;
  min-height: 3.2rem;
  padding: .75rem .9rem;
  border: 1px solid #b9b4d2;
  border-radius: .8rem;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.auth-form input:focus,
.admin-inline-form input:focus {
  outline: 3px solid rgba(73, 63, 219, .2);
  border-color: #493fdb;
}

.auth-form[hidden],
.admin-dashboard[hidden] {
  display: none;
}

.auth-footer {
  padding: 1.5rem 0;
  text-align: center;
}

.account-summary dl {
  display: grid;
  gap: .8rem;
  margin: 1.8rem 0;
}

.account-summary dl div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid #e4e0f3;
}

.account-summary dt { color: var(--muted); }
.account-summary dd { margin: 0; font-weight: 750; }

.deletion-form {
  border-color: rgba(143, 36, 66, .25);
}

.admin-main {
  padding: 2rem 0 5rem;
}

.admin-header,
.admin-panel-head,
.admin-record,
.admin-actions,
.admin-inline-form {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.admin-header { margin-bottom: 3rem; }
.admin-header > p { color: var(--muted); }

.admin-auth {
  display: grid;
  grid-template-columns: 1fr minmax(18rem, .62fr);
  gap: 2rem;
}

.admin-global-status { margin: 1rem 0 2rem; }

.admin-dashboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.admin-panel-head {
  margin-bottom: 1rem;
}

.admin-panel-head h2 { margin: 0; }
.admin-panel-head span { color: var(--muted); font-size: .9rem; }

.admin-list {
  list-style: none;
  display: grid;
  gap: .75rem;
  padding: 0;
  margin: 1rem 0 0;
}

.admin-record {
  align-items: flex-start;
  padding: 1rem;
  border: 1px solid #e1dcef;
  border-radius: 1rem;
  background: #fbfaff;
}

.admin-record p { margin: .25rem 0 0; color: var(--muted); line-height: 1.55; }
.admin-actions { flex-wrap: wrap; justify-content: flex-end; }
.admin-feedback-record { display: block; }
.admin-feedback-record p { color: var(--ink); white-space: pre-wrap; overflow-wrap: anywhere; }
.admin-empty { color: var(--muted); padding: 1rem; text-align: center; }
.admin-one-time-secret { overflow-wrap: anywhere; color: #7d1637; font-weight: 750; }

@media (max-width: 820px) {
  .auth-shell,
  .account-shell,
  .admin-auth,
  .admin-dashboard {
    grid-template-columns: 1fr;
  }

  .auth-main { align-items: start; }
  .auth-intro h1,
  .account-summary h1,
  .admin-auth h1 { max-width: 13ch; }
  .admin-record,
  .admin-inline-form { align-items: stretch; flex-direction: column; }
  .admin-actions { justify-content: flex-start; }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 9% 4%, rgb(214 203 255 / 0.34), transparent 22rem),
    radial-gradient(circle at 91% 20%, rgb(255 220 180 / 0.34), transparent 25rem),
    var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--accent-dark);
  text-underline-offset: 0.22em;
}

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

h1,
h2,
h3,
p,
ul,
ol {
  margin-top: 0;
}

h1,
h2,
h3 {
  letter-spacing: -0.035em;
  line-break: strict;
  line-height: 1.15;
  text-wrap: balance;
}

p,
li,
dd {
  line-break: strict;
  text-wrap: pretty;
}

h1 {
  max-width: 12ch;
  font-size: clamp(2.8rem, 7vw, 6.4rem);
  font-weight: 730;
}

h2 {
  max-width: 18ch;
  font-size: clamp(2rem, 4.5vw, 3.8rem);
  font-weight: 690;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
}

.container {
  width: var(--page);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  border-radius: 0.65rem;
  background: var(--ink);
  color: white;
  transform: translateY(-160%);
}

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

:focus-visible {
  outline: 3px solid #f5a623;
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid rgb(222 223 235 / 0.82);
  background: rgb(244 242 251 / 0.88);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  min-height: 4.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
  color: var(--ink);
  text-decoration: none;
}

.brand-symbol {
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 auto;
}

.brand-copy {
  display: grid;
  gap: 0.2rem;
  line-height: 1;
}

.brand-copy strong {
  color: inherit;
  font-size: 0.98rem;
  font-weight: 780;
  letter-spacing: 0.1em;
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 650;
  letter-spacing: 0.26em;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding: 0.55rem 0.82rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  background: var(--surface);
  color: var(--ink);
}

.nav-cta {
  border: 1px solid var(--ink);
}

.menu-toggle {
  display: none;
  min-width: 2.75rem;
  min-height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
}

.hero {
  min-height: calc(100svh - 4.75rem);
  display: grid;
  align-items: center;
  padding-block: clamp(4rem, 9vw, 8.5rem);
}

.eyebrow {
  margin-bottom: 1.25rem;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-copy {
  max-width: 46rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
}

.catalog-hero {
  padding-block: clamp(4.5rem, 10vw, 8rem) clamp(2.5rem, 6vw, 5rem);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.catalog-card,
.catalog-empty,
.lesson-detail {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  align-items: flex-start;
  padding: clamp(1.35rem, 2.5vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.catalog-card h2,
.catalog-card p,
.catalog-empty h2,
.catalog-empty p,
.lesson-detail p {
  margin-top: 0;
}

.catalog-card > .text-link {
  margin-top: auto;
}

.catalog-code {
  margin-bottom: 1.1rem;
  color: var(--accent-dark);
  font-size: 0.72rem;
  font-weight: 760;
  letter-spacing: 0.11em;
  overflow-wrap: anywhere;
}

.catalog-state {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  margin-block: 0.85rem;
}

.learnable-note {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 680;
}

.status-needs_revision {
  border-color: #bd7b23;
  background: #fff3dc;
  color: #75470a;
}

.status-learnable {
  border-color: #4f7f5e;
  background: #e5f2e8;
  color: #245432;
}

.catalog-meta,
.catalog-warning,
.catalog-disabled {
  color: var(--muted);
}

.catalog-warning {
  color: #75470a;
}

.catalog-disabled {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
}

.lesson-list {
  display: grid;
  gap: 0.8rem;
  padding: 0;
  list-style: none;
}

.lesson-row {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.lesson-row h2 {
  margin: 0 0 0.35rem;
  font-size: 1.08rem;
}

.lesson-row p {
  margin-bottom: 0;
}

.lesson-index {
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 760;
  letter-spacing: 0.08em;
}

.back-link {
  margin-top: 2rem;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.74rem 1.1rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: white;
  font-weight: 670;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  background: #25315a;
}

.button.secondary {
  background: transparent;
  color: var(--ink);
}

.button.secondary:hover {
  background: var(--surface);
}

.button:disabled {
  border-color: var(--line);
  background: #e4e8e5;
  color: #7a8581;
  cursor: not-allowed;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 680;
  text-decoration: none;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgb(255 255 255 / 0.6);
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 690;
  letter-spacing: 0.04em;
}

.hero-stage {
  position: relative;
  margin-top: clamp(3.5rem, 8vw, 7rem);
}

.timeline-demo {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

@media (prefers-reduced-motion: no-preference) {
  .timeline-demo {
    animation: stage-enter 700ms cubic-bezier(0.22, 1, 0.36, 1) both;
  }
}

@keyframes stage-enter {
  from {
    opacity: 0;
    transform: translateY(1rem) scale(0.99);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.demo-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.demo-head p {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 680;
}

.demo-body {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(17rem, 0.75fr);
}

.transcript {
  padding: 1.25rem;
}

.transcript-row {
  width: 100%;
  display: grid;
  grid-template-columns: 4.3rem 1fr;
  gap: 1rem;
  padding: 1.05rem 0.9rem;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.transcript-row:last-child {
  border-bottom: 0;
}

.transcript-row[aria-pressed="true"] {
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
}

.timestamp {
  color: var(--muted);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

.sentence-en {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--ink);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 640;
}

.sentence-zh {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.practice-panel {
  padding: 1.6rem;
  background: #10251f;
  color: white;
}

.practice-panel .eyebrow {
  color: #8bd7c1;
}

.practice-panel h3 {
  margin-bottom: 0.75rem;
}

.practice-panel p {
  color: #c5d6d0;
}

.word-token {
  display: inline-block;
  margin-right: 0.25rem;
  padding: 0.06rem 0.22rem;
  border-bottom: 2px solid #8bd7c1;
  color: white;
}

.section {
  padding-block: clamp(5rem, 10vw, 9rem);
}

.section.compact {
  padding-block: clamp(3.5rem, 7vw, 6rem);
}

.section-head {
  max-width: 44rem;
  margin-bottom: clamp(2.5rem, 6vw, 5rem);
}

.section-head > p:not(.eyebrow),
.lede {
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.entry-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1rem;
}

.entry {
  min-height: 26rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.entry.planned {
  background: transparent;
  border-style: dashed;
}

.entry-index {
  color: var(--muted);
  font-size: 0.84rem;
  font-variant-numeric: tabular-nums;
}

.flow {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.flow li {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr) minmax(14rem, 0.55fr);
  gap: 1.5rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
  counter-increment: flow;
}

.flow li::before {
  content: "0" counter(flow);
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 750;
}

.flow h3,
.flow p {
  margin: 0;
}

.flow p {
  color: var(--muted);
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.feature-item {
  min-height: 19rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature-item:nth-child(2n) {
  border-right: 0;
}

.feature-item p {
  max-width: 31rem;
  color: var(--muted);
}

.feature-number {
  display: block;
  margin-bottom: 5rem;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 750;
}

.course-stack {
  display: grid;
  gap: 1rem;
}

.course-row {
  display: grid;
  grid-template-columns: 8rem minmax(0, 1.4fr) minmax(12rem, 0.65fr);
  gap: 1.5rem;
  align-items: center;
  padding: clamp(1.4rem, 3vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.course-row p,
.course-row h3 {
  margin: 0;
}

.course-row p {
  color: var(--muted);
}

.course-code {
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 760;
  letter-spacing: 0.12em;
}

.notice {
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--accent-soft);
}

.notice.warning {
  border-left-color: var(--warning);
  background: #fff3dc;
}

.notice strong {
  display: block;
  margin-bottom: 0.2rem;
}

.notice p:last-child {
  margin-bottom: 0;
}

.form-shell {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
}

.demo-form,
.feedback-form {
  padding: clamp(1.4rem, 4vw, 3rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.field {
  margin-bottom: 1.35rem;
}

.field label,
.field legend {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 680;
}

.field select,
.field textarea {
  width: 100%;
  min-height: 3.15rem;
  padding: 0.7rem 2.5rem 0.7rem 0.8rem;
  border: 1px solid #aeb8b3;
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.field textarea {
  min-height: 13rem;
  padding: 0.9rem;
  line-height: 1.7;
  resize: vertical;
}

.field textarea::placeholder {
  color: #8a8fa2;
}

.field-label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.field-label-row span,
.field-help {
  color: var(--muted);
  font-size: 0.84rem;
}

.field-help {
  margin: 0.45rem 0 0;
}

.checkbox {
  display: grid;
  grid-template-columns: 1.25rem 1fr;
  gap: 0.65rem;
  align-items: start;
  margin-bottom: 1rem;
}

.checkbox input {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.28rem;
  accent-color: var(--accent);
}

.field-error {
  min-height: 1.4rem;
  margin: 0.35rem 0 0;
  color: var(--danger);
  font-size: 0.86rem;
}

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

.form-status {
  min-height: 7.5rem;
  margin-top: 1.4rem;
  padding: 1rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  color: var(--muted);
}

.form-status[data-state="loading"]::before {
  width: 1rem;
  height: 1rem;
  display: inline-block;
  margin-right: 0.5rem;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  content: "";
  vertical-align: -0.15rem;
  animation: spin 0.8s linear infinite;
}

.form-status[data-state="success"] {
  border-style: solid;
  border-color: #8dcdbb;
  background: var(--accent-soft);
  color: var(--ink);
}

.form-status[data-state="error"] {
  border-style: solid;
  border-color: #e5a39b;
  background: #fff1ef;
  color: #651a13;
}

/* Private feedback */
.feedback-hero-grid figure img {
  width: 100%;
  min-height: 34rem;
  border-radius: 1.5rem;
  object-fit: cover;
  object-position: center;
}

.privacy-promise {
  max-width: 34rem;
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.2rem;
  border: 1px solid rgb(109 74 255 / 0.2);
  border-radius: 1.1rem;
  background: rgb(255 255 255 / 0.78);
}

.privacy-promise > span {
  display: grid;
  width: 3.5rem;
  height: 3.5rem;
  place-items: center;
  border-radius: 50%;
  background: var(--navy);
  color: white;
  font-size: 1.1rem;
  font-weight: 760;
}

.privacy-promise p {
  margin: 0;
  color: var(--muted);
}

.privacy-promise strong {
  color: var(--ink);
}

.feedback-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(28rem, 1.2fr);
  gap: clamp(2.5rem, 7vw, 7rem);
  align-items: start;
}

.feedback-guidance {
  position: sticky;
  top: 7rem;
}

.feedback-principles {
  display: grid;
  gap: 0.75rem;
  margin-top: 2rem;
}

.feedback-principles article {
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  column-gap: 0.8rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.feedback-principles span {
  grid-row: 1 / span 2;
  color: var(--accent);
  font-weight: 760;
}

.feedback-principles h3,
.feedback-principles p {
  margin-bottom: 0;
}

.feedback-principles h3 {
  font-size: 1.1rem;
}

.feedback-principles p {
  color: var(--muted);
}

.feedback-form {
  border-top: 0.4rem solid var(--accent);
  box-shadow: var(--shadow);
}

.feedback-status {
  min-height: 6.4rem;
}

.feedback-boundary {
  background: linear-gradient(120deg, #fff7e5, #f1ebff 52%, #e2f7f3);
}

@media (max-width: 900px) {
  .feedback-layout {
    grid-template-columns: 1fr;
  }

  .feedback-guidance {
    position: static;
  }
}

@media (max-width: 680px) {
  .feedback-hero-grid figure img {
    min-height: 24rem;
  }

  .feedback-form {
    padding: 1.2rem;
  }

  .privacy-promise {
    grid-template-columns: 2.8rem 1fr;
  }

  .privacy-promise > span {
    width: 2.8rem;
    height: 2.8rem;
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.platform-item {
  min-height: 12rem;
  padding: 1.4rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.platform-item h3 {
  margin-bottom: 0.45rem;
}

.platform-item p {
  color: var(--muted);
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 1.5rem 3rem 1.5rem 0;
  font-size: 1.12rem;
  font-weight: 680;
  cursor: pointer;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  top: 1.5rem;
  right: 0.5rem;
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 48rem;
  padding-bottom: 1.5rem;
  color: var(--muted);
}

.legal-layout {
  display: grid;
  grid-template-columns: 14rem minmax(0, 43rem);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: start;
}

.legal-nav {
  position: sticky;
  top: 6.5rem;
}

.legal-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.legal-nav a {
  display: block;
  padding: 0.45rem 0;
  color: var(--muted);
  text-decoration: none;
}

.legal-copy h2 {
  margin-top: 4rem;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.legal-copy h2:first-child {
  margin-top: 0;
}

.legal-copy p,
.legal-copy li {
  color: #43504c;
}

.draft-banner {
  margin-bottom: 2.5rem;
  padding: 0.8rem 1rem;
  border: 1px solid #e5c68e;
  border-radius: var(--radius-sm);
  background: #fff6e6;
  color: #674211;
}

.callout {
  padding: clamp(2rem, 6vw, 5rem);
  border-radius: var(--radius-lg);
  background: #10251f;
  color: white;
}

.callout h2 {
  margin-bottom: 1.25rem;
}

.callout p {
  max-width: 44rem;
  color: #c5d6d0;
}

.site-footer {
  padding-block: 4rem 2rem;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2rem;
}

.footer-grid h2 {
  font-size: 1rem;
  letter-spacing: 0;
}

.footer-grid ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-grid a {
  display: inline-block;
  padding-block: 0.28rem;
  color: var(--muted);
  text-decoration: none;
}

.footer-brand p {
  max-width: 18rem;
  margin: 1.1rem 0 0.4rem;
  color: var(--muted);
}

.brand-domain {
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 720;
  letter-spacing: 0.08em;
}

.footer-note {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

.reveal {
  opacity: 1;
  transform: none;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 900px) {
  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-list {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1rem;
    left: 1rem;
    display: none;
    align-items: stretch;
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .nav-list[data-open="true"] {
    display: grid;
  }

  .nav-list a {
    width: 100%;
    border-radius: var(--radius-sm);
  }

  .demo-body,
  .entry-grid,
  .form-shell,
  .catalog-grid {
    grid-template-columns: 1fr;
  }

  .flow li {
    grid-template-columns: 2.5rem 1fr;
  }

  .flow li p {
    grid-column: 2;
  }

  .course-row {
    grid-template-columns: 5.5rem 1fr;
  }

  .lesson-row {
    grid-template-columns: 2.5rem minmax(0, 1fr);
  }

  .lesson-row > .text-link {
    grid-column: 2;
  }

  .course-row > p:last-child {
    grid-column: 2;
  }

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

  .legal-layout {
    grid-template-columns: 1fr;
  }

  .legal-nav {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  :root {
    --page: min(100% - 1.25rem, 72rem);
  }

  h1 {
    font-size: clamp(2.7rem, 14vw, 4.5rem);
  }

  .hero {
    min-height: auto;
    padding-top: 4.5rem;
  }

  .hero-actions .button,
  .button-row .button {
    width: 100%;
  }

  .demo-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .transcript {
    padding: 0.65rem;
  }

  .transcript-row {
    grid-template-columns: 3.4rem 1fr;
    gap: 0.6rem;
    padding-inline: 0.55rem;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }

  .feature-item,
  .feature-item:nth-child(2n) {
    min-height: auto;
    border-right: 0;
  }

  .feature-number {
    margin-bottom: 3rem;
  }

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

  .course-row > p:last-child {
    grid-column: auto;
  }

  .platform-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-contrast: more) {
  :root {
    --muted: #34413d;
    --line: #82908a;
  }

  .button,
  .nav-cta {
    border-width: 2px;
  }
}

/* 2026 visual system: expressive, image-led PC product pages */
.home-page {
  overflow-x: hidden;
}

.home-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(4.5rem, 8vw, 8rem) clamp(4rem, 7vw, 7rem);
  overflow: hidden;
  background:
    linear-gradient(125deg, rgb(244 242 251 / 0.55), rgb(255 255 255 / 0.88)),
    radial-gradient(circle at 78% 16%, rgb(255 199 115 / 0.45), transparent 25rem),
    radial-gradient(circle at 88% 84%, rgb(32 189 170 / 0.24), transparent 28rem);
}

.home-hero::before {
  position: absolute;
  z-index: -1;
  width: 29rem;
  height: 29rem;
  top: -15rem;
  left: -7rem;
  border: 4rem solid rgb(109 74 255 / 0.11);
  border-radius: 50%;
  content: "";
}

.home-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(29rem, 1.05fr);
  gap: clamp(3rem, 6vw, 6rem);
  align-items: center;
}

.home-hero-copy {
  position: relative;
  z-index: 2;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 780;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-kicker span {
  width: 2.2rem;
  height: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--coral), var(--sun));
}

.home-hero h1 {
  max-width: 9.5ch;
  margin-bottom: 1.6rem;
  font-size: clamp(3.45rem, 5.2vw, 6.1rem);
  font-weight: 790;
  letter-spacing: -0.065em;
  line-height: 0.98;
}

.home-hero h1 span {
  display: block;
  background: linear-gradient(100deg, var(--accent-dark), var(--blue) 48%, var(--teal));
  background-clip: text;
  color: transparent;
  -webkit-background-clip: text;
}

.home-hero .hero-copy {
  max-width: 35rem;
  font-size: clamp(1.08rem, 1.7vw, 1.35rem);
  line-height: 1.8;
}

.button-bright {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent), var(--blue));
  box-shadow: 0 0.8rem 2.2rem rgb(80 69 220 / 0.22);
}

.button-bright:hover {
  background: linear-gradient(135deg, #5d3bea, #1e5ee6);
}

.button-ghost {
  border-color: rgb(18 27 56 / 0.2);
  background: rgb(255 255 255 / 0.7);
  color: var(--ink);
}

.button-ghost:hover {
  background: white;
}

.button-dark {
  border-color: var(--navy);
  background: var(--navy);
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.2rem;
  margin: 1.7rem 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
  list-style: none;
}

.hero-proof span {
  margin-right: 0.3rem;
  color: var(--teal);
}

.hero-visual {
  position: relative;
  margin: 0;
  padding: 1rem 0 2.8rem 1.25rem;
}

.hero-visual::before {
  position: absolute;
  z-index: -1;
  inset: 0 2.8rem 2rem 0;
  border-radius: 42% 1.5rem 42% 1.5rem;
  background: linear-gradient(150deg, var(--sun), var(--coral) 52%, var(--violet));
  content: "";
  transform: rotate(2.5deg);
}

.hero-image-frame {
  overflow: hidden;
  border: 0.45rem solid white;
  border-radius: 1.5rem 7rem 1.5rem 1.5rem;
  background: white;
  box-shadow: 0 2rem 5rem rgb(32 34 67 / 0.2);
}

.hero-image-frame img {
  width: 100%;
  min-height: 31rem;
  object-fit: cover;
}

.hero-caption {
  position: absolute;
  right: -1.25rem;
  bottom: 0;
  width: min(20rem, 74%);
  padding: 1rem 1.3rem;
  border: 1px solid rgb(255 255 255 / 0.55);
  border-radius: 1rem;
  background: rgb(17 26 57 / 0.92);
  color: white;
  box-shadow: 0 1rem 3rem rgb(20 24 47 / 0.28);
  backdrop-filter: blur(12px);
}

.hero-caption span,
.community-visual figcaption span {
  display: block;
  margin-bottom: 0.2rem;
  color: #ffd675;
  font-size: 0.67rem;
  font-weight: 780;
  letter-spacing: 0.14em;
}

.hero-caption strong {
  font-size: 0.95rem;
}

.hero-float-card {
  position: absolute;
  top: -0.5rem;
  right: -2.2rem;
  display: grid;
  gap: 0.2rem;
  padding: 0.75rem 1rem;
  border: 1px solid rgb(255 255 255 / 0.7);
  border-radius: 1rem;
  background: rgb(255 255 255 / 0.86);
  color: var(--accent-dark);
  font-size: 0.72rem;
  font-weight: 760;
  box-shadow: 0 0.8rem 2.5rem rgb(74 53 156 / 0.16);
  backdrop-filter: blur(14px);
}

.float-wave {
  color: var(--coral);
  font-size: 1.25rem;
  letter-spacing: -0.15em;
}

.color-ribbon {
  background: var(--navy);
  color: white;
}

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

.color-ribbon-grid > div {
  min-height: 10.5rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  border-right: 1px solid rgb(255 255 255 / 0.16);
}

.color-ribbon-grid > div:nth-child(1) { background: linear-gradient(150deg, rgb(47 109 246 / 0.95), rgb(24 63 169 / 0.45)); }
.color-ribbon-grid > div:nth-child(2) { background: linear-gradient(150deg, rgb(127 83 216 / 0.92), rgb(109 74 255 / 0.35)); }
.color-ribbon-grid > div:nth-child(3) { background: linear-gradient(150deg, rgb(255 108 98 / 0.95), rgb(244 184 60 / 0.35)); }
.color-ribbon-grid > div:nth-child(4) { background: linear-gradient(150deg, rgb(11 157 140 / 0.95), rgb(17 26 57 / 0.4)); border-right: 0; }

.color-ribbon-grid span {
  margin-bottom: auto;
  color: rgb(255 255 255 / 0.72);
  font-size: 0.72rem;
  font-weight: 760;
}

.color-ribbon-grid strong {
  font-size: 1.2rem;
}

.color-ribbon-grid small {
  color: rgb(255 255 255 / 0.72);
}

.story-section {
  display: grid;
  gap: clamp(4rem, 8vw, 7rem);
}

.story-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.48fr);
  gap: 2rem;
  align-items: end;
}

.story-heading .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -1rem;
}

.story-heading h2,
.story-heading p {
  margin-bottom: 0;
}

.story-heading p:last-child {
  color: var(--muted);
  font-size: 1.08rem;
}

.visual-story {
  display: grid;
  grid-template-columns: minmax(0, 1.13fr) minmax(20rem, 0.87fr);
  overflow: hidden;
  border-radius: 1.5rem;
  color: white;
  box-shadow: 0 2rem 5rem rgb(30 33 69 / 0.13);
}

.visual-story-reverse {
  grid-template-columns: minmax(20rem, 0.87fr) minmax(0, 1.13fr);
}

.visual-story-reverse figure {
  order: 2;
}

.visual-story figure {
  min-height: 34rem;
  margin: 0;
  overflow: hidden;
}

.visual-story img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.visual-story-cobalt {
  background: linear-gradient(150deg, var(--blue), var(--cobalt));
}

.visual-story-coral {
  background: linear-gradient(150deg, #ff826d, #b6449d);
}

.visual-story-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2.2rem, 5vw, 4.8rem);
}

.visual-story-copy h3 {
  margin-bottom: 1.2rem;
  font-size: clamp(2rem, 3.6vw, 3.5rem);
}

.visual-story-copy p {
  color: rgb(255 255 255 / 0.8);
}

.story-number {
  margin-bottom: 2.7rem;
  color: #ffe78d;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.check-list {
  display: grid;
  gap: 0.6rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding-top: 0.65rem;
  border-top: 1px solid rgb(255 255 255 / 0.24);
  color: rgb(255 255 255 / 0.88);
  font-size: 0.9rem;
}

.check-list li::before {
  margin-right: 0.55rem;
  color: #ffe78d;
  content: "✦";
}

.demo-section {
  color: white;
  background:
    radial-gradient(circle at 80% 5%, rgb(127 83 216 / 0.48), transparent 27rem),
    radial-gradient(circle at 5% 100%, rgb(11 157 140 / 0.2), transparent 25rem),
    var(--navy);
}

.demo-layout {
  display: grid;
  grid-template-columns: minmax(16rem, 0.52fr) minmax(0, 1.48fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

.demo-intro .eyebrow {
  color: #a9bfff;
}

.demo-intro h2 {
  max-width: 11ch;
}

.demo-intro > p:not(.eyebrow) {
  color: #c9cee1;
}

.demo-note {
  display: grid;
  grid-template-columns: 2.3rem 1fr;
  gap: 0.8rem;
  margin-top: 2rem;
  padding-top: 1.3rem;
  border-top: 1px solid rgb(255 255 255 / 0.16);
}

.demo-note > span {
  color: #ffd675;
  font-size: 1.45rem;
}

.demo-note p {
  color: #adb6d3;
  font-size: 0.9rem;
}

.timeline-demo-color {
  border-color: rgb(255 255 255 / 0.16);
  background: rgb(255 255 255 / 0.96);
  color: var(--ink);
  box-shadow: 0 2.2rem 5rem rgb(0 0 0 / 0.26);
}

.timeline-demo-color .demo-head {
  background: linear-gradient(90deg, #f4efff, #fff5df);
}

.timeline-demo-color .transcript-row[aria-pressed="true"] {
  background: #eee9ff;
  box-shadow: inset 0.25rem 0 var(--accent);
}

.timeline-demo-color .practice-panel {
  background: linear-gradient(155deg, #20346f, #111a39 65%, #2a1d58);
}

.word-token {
  margin-inline: 0.1rem;
  padding: 0.06rem 0.3rem;
  border: 0;
  border-radius: 0.35rem;
  background: #3d2a83;
  color: white;
}

.community-section {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(20rem, 0.88fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: center;
}

.community-visual {
  position: relative;
  margin: 0;
}

.community-visual::before {
  position: absolute;
  z-index: -1;
  inset: 2.5rem -1.2rem -1.2rem 3rem;
  border-radius: 1.5rem;
  background: linear-gradient(135deg, var(--lime), var(--teal));
  content: "";
}

.community-visual img {
  width: 100%;
  aspect-ratio: 3 / 2;
  border-radius: 1.5rem;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.community-visual figcaption {
  position: absolute;
  right: -1rem;
  bottom: 1.2rem;
  max-width: 19rem;
  padding: 1rem 1.3rem;
  border-radius: 1rem 0 0 1rem;
  background: var(--navy);
  color: white;
}

.community-visual figcaption strong {
  font-size: 0.92rem;
}

.community-copy h2 {
  max-width: 12ch;
}

.community-copy > p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.08rem;
}

.pilot-principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
  margin: 2rem 0;
}

.pilot-principles > div {
  padding: 0.85rem;
  border-top: 0.25rem solid var(--accent);
  background: white;
}

.pilot-principles > div:nth-child(2) { border-color: var(--coral); }
.pilot-principles > div:nth-child(3) { border-color: var(--teal); }

.pilot-principles strong,
.pilot-principles span {
  display: block;
}

.pilot-principles strong {
  font-size: 0.82rem;
}

.pilot-principles span {
  color: var(--muted);
  font-size: 0.72rem;
}

.boundary-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(18rem, 1.2fr);
  gap: 3rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid rgb(109 74 255 / 0.18);
  border-radius: 1.5rem;
  background: linear-gradient(120deg, #fff, #f0ecff 55%, #e5f8f5);
  box-shadow: 0 1.5rem 4rem rgb(46 42 85 / 0.08);
}

.boundary-panel h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.boundary-panel ul {
  display: grid;
  gap: 0.6rem;
  align-content: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.boundary-panel li {
  padding: 0.7rem 0;
  border-bottom: 1px solid rgb(18 27 56 / 0.1);
  color: var(--muted);
}

.boundary-panel li::before {
  margin-right: 0.65rem;
  color: var(--coral);
  content: "—";
}

.site-footer-color {
  border-top: 0;
  background: var(--navy);
  color: white;
}

.site-footer-color .brand,
.site-footer-color .footer-grid h2 {
  color: white;
}

.site-footer-color .footer-grid a,
.site-footer-color .footer-brand p,
.site-footer-color .footer-note {
  color: #b9c0d7;
}

.site-footer-color .brand-copy small,
.site-footer-color .brand-domain {
  color: #8fe4d7;
}

.site-footer-color .footer-note {
  border-color: rgb(255 255 255 / 0.14);
}

/* Shared image-led interior pages */
.page-visual-hero {
  padding-block: clamp(3.5rem, 7vw, 6.5rem);
}

.page-visual-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(28rem, 1.18fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: center;
}

.page-visual-hero h1 {
  max-width: 9.5ch;
  font-size: clamp(3.3rem, 6vw, 6.3rem);
}

.page-visual-hero figure {
  position: relative;
  margin: 0;
}

.page-visual-hero figure::before {
  position: absolute;
  z-index: -1;
  inset: -1rem 2rem 2rem -1rem;
  border-radius: 1.5rem;
  background: linear-gradient(135deg, var(--sun), var(--coral), var(--violet));
  content: "";
}

.page-visual-hero img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 0.4rem solid white;
  border-radius: 1.5rem;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.feature-photo-band {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(19rem, 0.95fr);
  gap: 0;
  overflow: hidden;
  border-radius: 1.5rem;
  background: linear-gradient(145deg, var(--coral), #aa439d);
  color: white;
}

.feature-photo-band figure {
  min-height: 31rem;
  margin: 0;
}

.feature-photo-band img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-photo-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 5vw, 4rem);
}

.feature-photo-copy .eyebrow {
  color: #ffe698;
}

.feature-photo-copy p {
  color: rgb(255 255 255 / 0.82);
}

.beta-hero-card {
  padding: clamp(2rem, 4vw, 3.5rem);
  border: 1px solid rgb(109 74 255 / 0.16);
  border-radius: 1.5rem;
  background: linear-gradient(135deg, #ffffff, #eee9ff);
}

@media (max-width: 1040px) {
  .home-hero-grid,
  .page-visual-hero-grid {
    grid-template-columns: 1fr;
  }

  .home-hero-copy {
    max-width: 49rem;
  }

  .home-hero h1 {
    max-width: 10ch;
  }

  .hero-visual {
    width: min(100%, 52rem);
    margin-inline: auto;
  }

  .demo-layout {
    grid-template-columns: 1fr;
  }

  .demo-intro h2 {
    max-width: 16ch;
  }
}

@media (max-width: 820px) {
  .color-ribbon-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .color-ribbon-grid > div:nth-child(2) {
    border-right: 0;
  }

  .color-ribbon-grid > div:nth-child(-n + 2) {
    border-bottom: 1px solid rgb(255 255 255 / 0.16);
  }

  .story-heading,
  .visual-story,
  .visual-story-reverse,
  .community-section,
  .boundary-panel,
  .feature-photo-band {
    grid-template-columns: 1fr;
  }

  .story-heading .eyebrow {
    margin-bottom: -0.5rem;
  }

  .visual-story-reverse figure {
    order: 0;
  }

  .visual-story figure,
  .feature-photo-band figure {
    min-height: 25rem;
  }

  .community-visual {
    margin-right: 1rem;
  }

  .boundary-panel {
    gap: 1.5rem;
  }
}

@media (max-width: 620px) {
  .home-hero {
    padding-top: 3.5rem;
  }

  .home-hero h1,
  .page-visual-hero h1 {
    font-size: clamp(3.1rem, 13.2vw, 4.6rem);
  }

  .hero-image-frame img {
    min-height: 23rem;
  }

  .hero-visual {
    padding-left: 0;
  }

  .hero-visual::before {
    right: 1rem;
  }

  .hero-float-card {
    display: none;
  }

  .hero-caption {
    right: -0.2rem;
  }

  .color-ribbon-grid > div {
    min-height: 8.5rem;
    padding: 1.1rem;
  }

  .visual-story figure,
  .feature-photo-band figure {
    min-height: 19rem;
  }

  .visual-story-copy,
  .feature-photo-copy {
    padding: 1.6rem;
  }

  .story-number {
    margin-bottom: 1.5rem;
  }

  .pilot-principles {
    grid-template-columns: 1fr;
  }

  .community-visual figcaption {
    position: static;
    max-width: none;
    border-radius: 0 0 1rem 1rem;
  }

  .page-visual-hero figure::before {
    inset: -0.7rem 0.8rem 1rem -0.7rem;
  }
}

/* Official product-site information architecture */
.product-definition {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: end;
  padding-block: 1rem;
}

.product-definition .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -1rem;
}

.product-definition h2,
.product-definition p {
  margin-bottom: 0;
}

.product-definition p:last-child {
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.feature-panorama {
  background:
    radial-gradient(circle at 8% 10%, rgb(109 74 255 / 0.12), transparent 23rem),
    radial-gradient(circle at 92% 88%, rgb(11 157 140 / 0.12), transparent 24rem),
    #fff;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.capability-card {
  min-height: 17.5rem;
  padding: 1.45rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgb(255 255 255 / 0.82);
}

.capability-card span,
.value-grid span,
.principle-grid span {
  display: inline-flex;
  margin-bottom: 4rem;
  color: var(--accent-dark);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.capability-card h3 {
  margin-bottom: 0.7rem;
}

.capability-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.capability-card.tone-blue { box-shadow: inset 0 0.32rem var(--blue); }
.capability-card.tone-violet { box-shadow: inset 0 0.32rem var(--violet); }
.capability-card.tone-teal { box-shadow: inset 0 0.32rem var(--teal); }
.capability-card.tone-coral { box-shadow: inset 0 0.32rem var(--coral); }
.capability-card.tone-sun { box-shadow: inset 0 0.32rem var(--sun); }

.section-link {
  margin: 2rem 0 0;
  text-align: right;
}

.roadmap-section {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.95fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}

.roadmap-copy h2 {
  max-width: 13ch;
  font-size: clamp(2.1rem, 4vw, 3.7rem);
}

.roadmap-list {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.roadmap-list article {
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
}

.roadmap-list h3 {
  margin: 0.75rem 0 0.45rem;
}

.roadmap-list p {
  margin-bottom: 0;
  color: var(--muted);
}

.status-pill.roadmap {
  border-color: rgb(109 74 255 / 0.25);
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.pricing-preview {
  background: linear-gradient(120deg, #f7e16d, #ffac83 48%, #a98cff);
}

.pricing-preview-grid {
  display: grid;
  grid-template-columns: minmax(18rem, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: center;
}

.pricing-preview-grid > .button {
  justify-self: start;
}

.pricing-preview-grid > div:first-child p:not(.eyebrow) {
  max-width: 38rem;
  color: rgb(18 27 56 / 0.72);
}

.mini-plan-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.mini-plan-grid article {
  min-height: 15rem;
  padding: 1.5rem;
  border: 1px solid rgb(255 255 255 / 0.6);
  border-radius: 1.2rem;
  background: rgb(255 255 255 / 0.76);
  backdrop-filter: blur(14px);
}

.mini-plan-grid span,
.plan-label {
  color: var(--accent-dark);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.mini-plan-grid h3 {
  margin: 3rem 0 0.6rem;
}

.mini-plan-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.download-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: center;
  padding: clamp(2rem, 5vw, 4rem);
  overflow: hidden;
  border-radius: 1.5rem;
  background:
    radial-gradient(circle at 92% 8%, rgb(244 184 60 / 0.54), transparent 17rem),
    linear-gradient(135deg, #fff, #eef0ff 56%, #e7faf5);
  box-shadow: var(--shadow);
}

.download-cta h2,
.download-cta p {
  margin-bottom: 0.7rem;
}

.download-cta p:not(.eyebrow) {
  max-width: 43rem;
  color: var(--muted);
}

/* Comprehensive functions page */
.function-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.function-group {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: white;
}

.function-group-head {
  min-height: 11rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  color: white;
}

.function-group-head.tone-blue { background: linear-gradient(145deg, var(--blue), var(--cobalt)); }
.function-group-head.tone-violet { background: linear-gradient(145deg, var(--violet), #4a2ba3); }
.function-group-head.tone-coral { background: linear-gradient(145deg, var(--coral), #ba3f7b); }
.function-group-head.tone-sun { background: linear-gradient(145deg, var(--sun), #e07839); }
.function-group-head.tone-teal { background: linear-gradient(145deg, var(--teal), #08665f); }

.function-group-head span {
  color: rgb(255 255 255 / 0.7);
  font-size: 0.72rem;
  font-weight: 800;
}

.function-group-head h3 {
  margin-bottom: 0;
  font-size: clamp(1.6rem, 3vw, 2.45rem);
}

.function-group ul {
  margin: 0;
  padding: 0.6rem 1.5rem 1.3rem;
  list-style: none;
}

.function-group li {
  display: grid;
  grid-template-columns: minmax(8rem, 0.42fr) minmax(0, 0.58fr);
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.function-group li:last-child {
  border-bottom: 0;
}

.function-group li span {
  color: var(--muted);
  font-size: 0.88rem;
}

.roadmap-panel-section {
  background: var(--navy);
  color: white;
}

.roadmap-panel-section .eyebrow {
  color: #a9bfff;
}

.roadmap-panel-section .section-head > p:not(.eyebrow) {
  color: #b9c0d7;
}

.future-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.future-card {
  padding: clamp(1.5rem, 3vw, 2.2rem);
  border: 1px solid rgb(255 255 255 / 0.16);
  border-radius: 1.25rem;
  background: rgb(255 255 255 / 0.06);
}

.future-card h3 {
  margin: 2.6rem 0 0.7rem;
}

.future-card p,
.future-card li {
  color: #bcc4dc;
}

.future-card ul {
  margin: 1.4rem 0 0;
  padding-left: 1.15rem;
}

/* Pricing */
.commercial-hero,
.download-hero,
.about-hero {
  padding-block: clamp(4rem, 9vw, 8rem);
}

.commercial-hero {
  background:
    radial-gradient(circle at 88% 18%, rgb(255 108 98 / 0.28), transparent 25rem),
    radial-gradient(circle at 20% 95%, rgb(109 74 255 / 0.18), transparent 28rem);
}

.commercial-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(19rem, 0.8fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: end;
}

.pricing-status {
  display: grid;
  grid-template-columns: 1rem 1fr;
  gap: 0.8rem;
  padding: 1.4rem;
  border: 1px solid rgb(109 74 255 / 0.2);
  border-radius: 1rem;
  background: rgb(255 255 255 / 0.72);
}

.pricing-status p {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.status-dot {
  width: 0.7rem;
  height: 0.7rem;
  margin-top: 0.4rem;
  border-radius: 50%;
  background: var(--sun);
  box-shadow: 0 0 0 0.35rem rgb(244 184 60 / 0.2);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.price-card {
  min-height: 42rem;
  display: flex;
  flex-direction: column;
  padding: clamp(1.6rem, 4vw, 3rem);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: white;
}

.price-card.pro {
  border: 0;
  background: linear-gradient(145deg, #232e65, #432b7d 58%, #7b3d82);
  color: white;
  box-shadow: 0 1.8rem 4.5rem rgb(43 38 93 / 0.24);
}

.price-card.pro p,
.price-card.pro li,
.price-card.pro .price-value span {
  color: #d2d5e7;
}

.price-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.price-card h3 {
  font-size: clamp(2rem, 4vw, 3rem);
}

.price-value {
  display: grid;
  gap: 0.25rem;
  margin: 1.5rem 0;
}

.price-value strong {
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  letter-spacing: -0.06em;
}

.price-value span {
  color: var(--muted);
  font-size: 0.85rem;
}

.plan-list {
  display: grid;
  gap: 0.8rem;
  margin: 1.5rem 0 2.4rem;
  padding: 0;
  list-style: none;
}

.plan-list li::before {
  margin-right: 0.6rem;
  color: var(--teal);
  content: "✓";
}

.price-card.pro .plan-list li::before {
  color: #ffd675;
}

.price-card > :last-child {
  margin-top: auto;
}

.disabled-action {
  border-color: rgb(18 27 56 / 0.14);
  background: rgb(18 27 56 / 0.08);
  color: var(--muted);
  cursor: not-allowed;
}

.price-card.pro .disabled-action {
  border-color: rgb(255 255 255 / 0.22);
  background: rgb(255 255 255 / 0.1);
  color: white;
}

.pricing-principles,
.support-section,
.values-section {
  background: white;
}

.principle-grid,
.support-grid,
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.principle-grid article,
.support-grid article,
.value-grid article {
  min-height: 17rem;
  padding: 1.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.principle-grid p,
.support-grid p,
.value-grid p {
  color: var(--muted);
}

/* Download */
.download-hero {
  background:
    radial-gradient(circle at 8% 10%, rgb(47 109 246 / 0.22), transparent 26rem),
    radial-gradient(circle at 94% 84%, rgb(11 157 140 / 0.22), transparent 27rem);
}

.download-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(24rem, 1.05fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}

.download-card {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 1.25rem;
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border: 1px solid rgb(255 255 255 / 0.78);
  border-radius: 1.5rem;
  background: rgb(255 255 255 / 0.82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.extension-icon {
  width: 5.5rem;
  height: 5.5rem;
  overflow: hidden;
  border-radius: 1.35rem;
  box-shadow: 0 0.9rem 2rem rgb(17 25 54 / 0.18);
}

.extension-icon img {
  width: 100%;
  height: 100%;
}

.download-card h2 {
  margin: 0.8rem 0 0.4rem;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

.download-card p {
  color: var(--muted);
}

.download-card dl {
  grid-column: 1 / -1;
  margin: 1rem 0 0;
  border-top: 1px solid var(--line);
}

.download-card dl > div {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.download-card dt {
  color: var(--muted);
}

.download-card dd {
  margin: 0;
  font-weight: 680;
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.install-steps li {
  min-height: 19rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.7rem;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.install-steps li:first-child {
  border-left: 1px solid var(--line);
}

.install-steps span,
.support-icon {
  color: var(--accent-dark);
  font-weight: 800;
}

.install-steps p {
  color: var(--muted);
}

.support-icon {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  margin-bottom: 4rem;
  border-radius: 50%;
  background: var(--accent-soft);
}

.compatibility-note,
.company-info {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(18rem, 1.3fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: center;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: white;
}

.compatibility-note p {
  color: var(--muted);
}

/* About */
.about-hero {
  background: linear-gradient(120deg, #151f48, #302464 58%, #5c2f76);
  color: white;
}

.about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(28rem, 1.08fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}

.about-hero .eyebrow {
  color: #ffd675;
}

.about-hero .hero-copy {
  color: #c8cde1;
}

.about-hero figure {
  margin: 0;
}

.about-hero img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 50% 1.5rem 1.5rem 1.5rem;
  object-fit: cover;
  box-shadow: 0 2rem 5rem rgb(0 0 0 / 0.32);
}

.mission-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(20rem, 1.15fr);
  gap: clamp(3rem, 8vw, 8rem);
}

.mission-copy {
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.team-band {
  display: grid;
  grid-template-columns: minmax(20rem, 0.9fr) minmax(0, 1.1fr);
  overflow: hidden;
  border-radius: 1.5rem;
  background: linear-gradient(140deg, #f4c74c, #ff8f70);
}

.team-band > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 5vw, 4rem);
}

.team-band img {
  width: 100%;
  height: 100%;
  min-height: 31rem;
  object-fit: cover;
}

.company-info > div:last-child p {
  color: var(--muted);
}

@media (max-width: 1100px) {
  .capability-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 900px) {
  .product-definition,
  .roadmap-section,
  .pricing-preview-grid,
  .commercial-hero-grid,
  .download-hero-grid,
  .about-hero-grid,
  .mission-grid,
  .team-band,
  .compatibility-note,
  .company-info {
    grid-template-columns: 1fr;
  }

  .function-groups,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .future-grid,
  .install-steps {
    grid-template-columns: 1fr;
  }

  .install-steps li,
  .install-steps li:first-child {
    min-height: 13rem;
    border-right: 1px solid var(--line);
    border-left: 1px solid var(--line);
    border-bottom: 0;
  }

  .install-steps li:last-child {
    border-bottom: 1px solid var(--line);
  }

  .team-band img {
    min-height: 24rem;
  }
}

@media (max-width: 680px) {
  .capability-grid,
  .mini-plan-grid,
  .principle-grid,
  .support-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }

  .capability-card,
  .principle-grid article,
  .support-grid article,
  .value-grid article {
    min-height: auto;
  }

  .capability-card span,
  .value-grid span,
  .principle-grid span,
  .support-icon {
    margin-bottom: 2.2rem;
  }

  .function-group li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .download-cta {
    grid-template-columns: 1fr;
  }

  .download-cta .button {
    width: 100%;
  }

  .download-card {
    grid-template-columns: 4.3rem minmax(0, 1fr);
  }

  .extension-icon {
    width: 4.3rem;
    height: 4.3rem;
    font-size: 1rem;
  }

  .download-card dl > div {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .price-card {
    min-height: auto;
  }
}