/* Stacks landing page.

   Clean and product-led. One strong blue carries the brand; yellow, coral
   and mint are the card labels, used at full strength only on the board and
   as soft tints elsewhere. No gradients, no glass. */

/* Both faces ship in fonts/ (Latin subset, variable weight) so the page has no
   outside dependencies. Each is under the SIL Open Font License 1.1:
   Bricolage Grotesque, Copyright 2022 The Bricolage Grotesque Project Authors
     (https://github.com/ateliertriay/bricolage)
   Instrument Sans, Copyright 2022 The Instrument Sans Project Authors
     (https://github.com/Instrument/instrument-sans) */

@font-face {
  font-family: "Bricolage Grotesque";
  font-style: normal;
  font-weight: 600 800;
  font-display: swap;
  src: url("fonts/bricolage-grotesque.woff2") format("woff2");
}

@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("fonts/instrument-sans.woff2") format("woff2");
}

:root {
  color-scheme: light;

  --bg: #ffffff;
  --surface: #ffffff;
  --sunk: #f6f7fa;        /* alternate sections, recessed areas */
  --ink: #0f1430;
  --ink-2: #4a5068;
  --ink-3: #80859a;
  --line: #e4e6ee;

  --blue: #2451e6;
  --blue-press: #1b3fbf;
  --blue-soft: #e8edff;
  --yellow-soft: #fff5d6;
  --coral-soft: #ffece6;
  --mint-soft: #dcf5ec;
  --navy: #0d1440;
  --yellow: #ffcf33;
  --coral: #ff6647;
  --mint: #1fc79a;
  --on-color: #101631;    /* text sitting on yellow, coral, mint */

  --display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --sans: "Instrument Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --r-sm: 8px;
  --r: 12px;
  --r-lg: 18px;

  --lift: 0 18px 36px -14px rgba(13, 20, 64, 0.3), 0 3px 8px rgba(13, 20, 64, 0.08);
  --window: 0 40px 80px -32px rgba(13, 20, 64, 0.35), 0 12px 24px -12px rgba(13, 20, 64, 0.12);
  --soft: 0 1px 0 rgba(13, 20, 64, 0.06), 0 1px 3px rgba(13, 20, 64, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;

    --bg: #0a0e24;
    --surface: #121834;
    --sunk: #0e132c;
    --ink: #f2f3f8;
    --ink-2: #b3b8cf;
    --ink-3: #858aa6;
    --line: #232a4d;

    --blue: #3f69ff;
    --blue-press: #5b7fff;
    --blue-soft: #1a2560;
    --yellow-soft: #33290f;
    --coral-soft: #3a1c15;
    --mint-soft: #0f3127;
    --navy: #060a22;

    --lift: 0 20px 40px -14px rgba(0, 0, 0, 0.7), 0 3px 8px rgba(0, 0, 0, 0.4);
    --soft: 0 1px 2px rgba(0, 0, 0, 0.35);
    --window: 0 40px 80px -30px rgba(0, 0, 0, 0.8);
  }
}

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

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.028em;
  line-height: 1.06;
  text-wrap: balance;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
  border-radius: 6px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.tag {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
}

/* ------------------------------------------------------------------ buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font-weight: 600;
  font-size: 16px;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.15s, transform 0.15s;
}

.btn:hover {
  background: var(--blue-press);
}

.btn:active {
  transform: translateY(1px);
}

.btn--sm {
  padding: 9px 18px;
  font-size: 15px;
}

.btn--lg {
  padding: 15px 26px;
  font-size: 17px;
}

.btn--light {
  background: #fff;
  color: #0f1430;
}

.btn--light:hover {
  background: #e8edff;
}

/* --------------------------------------------------------------------- nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.03em;
  text-decoration: none;
}

/* Three stacked bars in the label colours: a column, seen from the side. */
.brand__mark {
  display: inline-grid;
  gap: 3px;
  padding: 6px;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--blue);
}

.brand__mark i {
  display: block;
  border-radius: 2px;
  background: #fff;
}

.brand__mark i:nth-child(1) { width: 100%; }
.brand__mark i:nth-child(2) { width: 70%; background: var(--yellow); }
.brand__mark i:nth-child(3) { width: 85%; }

.nav__links {
  display: flex;
  gap: 26px;
}

.nav__links a,
.nav__signin {
  font-weight: 600;
  font-size: 15.5px;
  text-decoration: none;
  color: var(--ink-2);
  transition: color 0.15s;
}

.nav__links a:hover,
.nav__signin:hover {
  color: var(--blue);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: auto;
}

/* -------------------------------------------------------------------- hero */

.hero {
  padding: clamp(48px, 8vw, 104px) 0 clamp(64px, 9vw, 112px);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
}

.hero h1 {
  font-size: clamp(44px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero h1 .accent {
  color: var(--blue);
}

.lede {
  max-width: 30em;
  margin-top: 26px;
  font-size: clamp(18px, 1.6vw, 20.5px);
  line-height: 1.5;
  color: var(--ink-2);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 22px;
  margin-top: 36px;
}

.hero__note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
}

.hero__note svg {
  color: var(--mint);
  flex: none;
}

/* ------------------------------------------------------------ board stage */

.stage {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--window);
}

/* The app's own top bar, so the demo reads as the product, not a drawing. */
.stage__chrome {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 52px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
}

.stage__brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
}

.stage__brand .brand__mark {
  width: 22px;
  height: 22px;
  padding: 4px;
  gap: 2px;
  border-radius: 6px;
}

.stage__picker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border-radius: 7px;
  background: var(--sunk);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
}

.stage__avatar {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-left: auto;
  border-radius: 50%;
  background: var(--mint);
  color: #0f1430;
  font-size: 13px;
  font-weight: 700;
}

.stage__hint {
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-3);
  text-align: center;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  align-items: start;
  padding: 16px;
  border-radius: 0 0 calc(var(--r-lg) - 1px) calc(var(--r-lg) - 1px);
  background: var(--blue);
}

.b-col {
  padding: 12px 10px 10px;
  border-radius: 12px;
  background: #eef0f6;
  transition: background-color 0.15s, box-shadow 0.15s;
}

.b-col.is-target {
  background: #e8edff;
  box-shadow: inset 0 0 0 2px #9fb4ff;
}

.b-col__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0 4px 10px;
}

.b-col__name {
  font-weight: 700;
  font-size: 14.5px;
  color: #101631;
}

.b-col__n {
  min-width: 22px;
  padding: 1px 7px;
  border-radius: 999px;
  background: #dfe2ee;
  font-size: 12.5px;
  font-weight: 700;
  text-align: center;
  color: #454b66;
}

.b-col__cards {
  min-height: 48px;
}

.b-card {
  margin-bottom: 8px;
  padding: 10px 12px 12px;
  border-radius: var(--r-sm);
  background: #fff;
  color: #101631;
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.35;
  box-shadow: 0 1px 0 rgba(16, 22, 49, 0.12);
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
}

.b-card:hover {
  box-shadow: 0 1px 0 rgba(16, 22, 49, 0.12), inset 0 0 0 2px var(--blue);
}

.b-card:last-child {
  margin-bottom: 0;
}

.b-card .chip {
  display: block;
  margin-bottom: 8px;
}

.b-card__meta {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: #7d8298;
}

.b-card__meta::before {
  content: "";
  width: 11px;
  height: 9px;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
}

.b-card.is-dragging {
  position: fixed;
  z-index: 40;
  margin: 0;
  cursor: grabbing;
  pointer-events: none;
  box-shadow: var(--lift);
  will-change: transform;
}

.b-slot {
  margin-bottom: 8px;
  border-radius: var(--r-sm);
  background: #dfe2ee;
}

body.is-dragging {
  cursor: grabbing;
}

body.is-dragging .b-card:not(.is-dragging) {
  transition: transform 0.19s cubic-bezier(0.2, 0, 0, 1);
}

/* Card labels: the four colours the whole page is built from. */
.chip {
  display: inline-block;
  width: 44px;
  height: 8px;
  border-radius: 999px;
}

.chip--blue { background: var(--blue); }
.chip--yellow { background: var(--yellow); }
.chip--coral { background: var(--coral); }
.chip--mint { background: var(--mint); }

/* ---------------------------------------------------------- section heads */

.section-head {
  max-width: 720px;
  margin-bottom: clamp(36px, 5vw, 56px);
}

.section-head h2 {
  font-size: clamp(32px, 4vw, 48px);
}

.section-head__sub {
  margin-top: 16px;
  font-size: 18px;
  color: var(--ink-2);
}

.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ---------------------------------------------------------------- features */

.features {
  padding: clamp(64px, 9vw, 120px) 0;
  background: var(--sunk);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.tabs {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: stretch;
}

.tabs__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tab {
  position: relative;
  display: block;
  width: 100%;
  padding: 20px 22px 20px 26px;
  border: 1px solid transparent;
  border-radius: var(--r);
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s, box-shadow 0.15s;
}

.tab::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 5px;
  border-radius: 999px;
  background: var(--line);
  transition: background-color 0.15s;
}

.tab:hover {
  background: color-mix(in srgb, var(--surface) 60%, transparent);
}

.tab[aria-selected="true"] {
  background: var(--surface);
  border-color: var(--line);
  box-shadow: var(--soft);
}

.tab--yellow[aria-selected="true"]::before { background: var(--yellow); }
.tab--coral[aria-selected="true"]::before { background: var(--coral); }
.tab--mint[aria-selected="true"]::before { background: var(--mint); }

.tab__title {
  display: block;
  font-family: var(--display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.tab__body {
  display: block;
  margin-top: 6px;
  font-size: 16px;
  color: var(--ink-2);
}

.tabs__panels {
  display: grid;
}

.panel {
  display: grid;
  place-items: center;
  min-height: 420px;
  padding: clamp(28px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  animation: panel-in 0.35s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.panel--yellow { background: var(--yellow-soft); }
.panel--coral { background: var(--coral-soft); }
.panel--mint { background: var(--mint-soft); }

@keyframes panel-in {
  from {
    opacity: 0.4;
  }
}

/* The mock UI inside each panel is always light: it is a picture of the app. */
.mock {
  width: 100%;
  max-width: 380px;
  padding: 24px;
  border: 1px solid #e4e6ee;
  border-radius: 14px;
  background: #fff;
  color: #101631;
  box-shadow: 0 24px 48px -24px rgba(16, 22, 49, 0.35);
  animation: mock-in 0.45s cubic-bezier(0.2, 0.7, 0.2, 1);
}

@keyframes mock-in {
  from {
    transform: translateY(10px);
    opacity: 0;
  }
}

.mock__title {
  margin-top: 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.mock__label {
  margin-top: 18px;
  font-size: 13px;
  font-weight: 700;
  color: #7d8298;
}

.mock__notes {
  margin-top: 6px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #f3f4f9;
  font-size: 15px;
  color: #454b66;
}

.mock__saved {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 5px 12px 5px 9px;
  border-radius: 999px;
  background: #dcf7ee;
  color: #0b7a5c;
  font-size: 14px;
  font-weight: 700;
}

.mock--signin {
  text-align: center;
}

.mock__lock {
  display: inline-grid;
  place-items: center;
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: #ffe6e0;
  color: var(--coral);
}

.mock__muted {
  margin-top: 6px;
  font-size: 15px;
  color: #454b66;
}

.mock__button {
  display: block;
  margin-top: 20px;
  padding: 13px;
  border-radius: 10px;
  background: #101631;
  color: #fff;
  font-weight: 600;
}

.mock__fine {
  margin-top: 12px;
  font-size: 13px;
  color: #7d8298;
}

.mock--menu {
  padding: 16px;
}

.mock--menu .mock__label {
  margin: 4px 8px 8px;
}

.mock--menu ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.mock--menu li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 10px;
  border-radius: 12px;
  font-weight: 600;
}

.mock--menu li.is-current {
  background: #e4eaff;
  color: #1740d6;
}

.swatch {
  width: 26px;
  height: 20px;
  border-radius: 6px;
  flex: none;
}

.swatch--blue { background: var(--blue); }
.swatch--yellow { background: var(--yellow); }
.swatch--coral { background: var(--coral); }
.swatch--mint { background: var(--mint); }

.mock__count {
  margin-left: auto;
  font-size: 13px;
  font-weight: 700;
  color: #7d8298;
}

.mock__new {
  display: block;
  margin-top: 8px;
  padding: 11px 10px;
  border-top: 1px solid #eceef5;
  font-weight: 700;
  color: #2152ff;
}

/* --------------------------------------------------------------------- how */

.how {
  padding: clamp(64px, 9vw, 120px) 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.step {
  padding: 28px 26px 30px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--line);
}

.step__n {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 22px;
  border-radius: 10px;
  background: var(--blue-soft);
  font-family: var(--display);
  font-weight: 700;
  font-size: 19px;
  color: var(--blue);
}

.step h3 {
  font-size: 22px;
  letter-spacing: -0.025em;
}

.step p {
  margin-top: 10px;
  color: var(--ink-2);
}

/* ----------------------------------------------------------------- details */

.details {
  padding: 0 0 clamp(64px, 9vw, 120px);
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.tile {
  padding: 26px 24px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
}

.tile__icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  border-radius: 10px;
}

.tile__icon--blue { background: var(--blue-soft); color: var(--blue); }
.tile__icon--coral { background: var(--coral-soft); color: var(--coral); }
.tile__icon--yellow { background: var(--yellow-soft); color: #c28f00; }
.tile__icon--mint { background: var(--mint-soft); color: #13a47d; }

.tile h3 {
  font-size: 20px;
  letter-spacing: -0.02em;
}

.tile p {
  margin-top: 8px;
  font-size: 15.5px;
  color: var(--ink-2);
}

/* ------------------------------------------------------------------- close */

.close {
  padding: 0 var(--gutter) clamp(64px, 8vw, 104px);
}

.close__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px 48px;
  padding: clamp(40px, 6vw, 80px) clamp(28px, 6vw, 80px);
  border-radius: 24px;
  background: var(--navy);
  color: #fff;
}

.close h2 {
  font-size: clamp(32px, 4.4vw, 54px);
  line-height: 1.04;
}

.close__cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.close__note {
  font-size: 15px;
  font-weight: 500;
  opacity: 0.7;
}

/* -------------------------------------------------------------------- foot */

.foot {
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.foot__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand--foot {
  font-size: 20px;
}

.brand--foot .brand__mark {
  width: 28px;
  height: 28px;
  padding: 5px;
}

.foot__meta {
  display: flex;
  gap: 14px;
  font-size: 14.5px;
  color: var(--ink-3);
}

.foot__meta a {
  color: var(--ink);
  font-weight: 600;
}

/* ------------------------------------------------------------------ reveal */

/* One sequence, on load. Base styles are the finished state, so no-JS and
   reduced-motion both land on a readable page. */
.reveal {
  animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.reveal--1 { animation-delay: 0.06s; }
.reveal--2 { animation-delay: 0.14s; }
.reveal--3 { animation-delay: 0.22s; }

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
}

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

  .reveal,
  .panel,
  .mock {
    animation: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* -------------------------------------------------------------- responsive */

@media (max-width: 1020px) {
  .hero__grid,
  .tabs {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero__copy {
    max-width: 680px;
  }

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

  .panel {
    min-height: 360px;
  }
}

@media (max-width: 760px) {
  .nav__links {
    display: none;
  }

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

  .close__inner {
    border-radius: 20px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .nav__inner {
    height: 60px;
  }

  .nav__signin {
    display: none;
  }

  .hero__cta .btn {
    width: 100%;
  }

  .stage__picker {
    display: none;
  }

  .board {
    padding: 12px;
  }

  /* Three columns stay side by side, the board scrolls sideways like the app. */
  .board {
    grid-template-columns: repeat(3, 72%);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .board::-webkit-scrollbar {
    display: none;
  }

  .b-col {
    scroll-snap-align: start;
  }

  /* Let a swipe scroll the board; a press-and-hold still picks a card up. */
  .b-card {
    touch-action: pan-x pan-y;
  }

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

  .panel {
    min-height: 0;
    padding: 28px 18px;
  }

  .close {
    padding-left: 0;
    padding-right: 0;
  }

  .close__inner {
    margin: 0 var(--gutter);
    width: auto;
  }

  .close__cta,
  .close__cta .btn {
    width: 100%;
  }
}