/* =========================================================
   Proofly — landing page
   Tokens → base → layout → components → responsive
   ========================================================= */

:root {
  /* colour */
  --paper:        #F6F3EC;
  --paper-panel:  #FCFAF5;
  --paper-app:    #FFFDF8;
  --paper-inset:  #F8F4EC;
  --ink:          #191712;
  --ink-soft:     #3A352C;
  --ink-muted:    #4A443A;
  --ink-faint:    #6B6457;
  --rule:         #DED6C6;
  --rule-strong:  #C9C0AE;
  --rule-dashed:  #CFC5B2;

  --accent:       #2A4B8D;
  --accent-dark:  #1D3767;
  --on-accent:    #FDFCF9;

  --assume-bg:     #EAF0F9;
  --assume-border: #C7D4EB;
  --assume-label:  #4A6199;
  --assume-text:   #1E3A6B;

  --conclude-bg:     #E7EFE6;
  --conclude-border: #C2D6C0;
  --conclude-label:  #47694A;
  --conclude-text:   #2B4A2E;

  /* type */
  --font-display: Fraunces, "Iowan Old Style", Georgia, serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  /* shape + rhythm */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --gutter: clamp(24px, 6vw, 120px);
  --section-y: clamp(64px, 8vw, 104px);
  --measure: 800px;
  --measure-wide: 880px;
}

/* ---------- base ---------- */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0; }
p { margin: 0; }

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.container { max-width: 1280px; margin: 0 auto; padding-inline: var(--gutter); }

.measure { max-width: var(--measure); }
.measure-wide { max-width: var(--measure-wide); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

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

.hero { border-bottom: 1px solid var(--rule); }

.hero-inner {
  padding-block: clamp(56px, 9vw, 120px) clamp(64px, 8vw, 112px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-title {
  font-size: clamp(66px, 11vw, 140px);
  line-height: 1;
  letter-spacing: -0.035em;
}

.hero-tagline {
  margin-top: 22px;
  font-size: clamp(19px, 2.2vw, 27px);
  line-height: 1.35;
  color: var(--ink-muted);
}

.button-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-top: 44px; }

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

.btn {
  display: inline-block;
  padding: 15px 29px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  transition: background-color .15s ease, border-color .15s ease;
}

.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-dark); color: var(--on-accent); }

.btn-secondary { border-color: var(--rule-strong); color: var(--ink); }
.btn-secondary:hover { border-color: var(--ink); color: var(--ink); }

.btn-block { display: block; width: 100%; }

/* ---------- sections ---------- */

.section { padding-block: var(--section-y); }
.section-bordered { border-bottom: 1px solid var(--rule); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow-muted { color: var(--ink-faint); letter-spacing: 0.12em; font-size: 12px; }

.section-title {
  margin-top: 22px;
  font-size: clamp(30px, 3.4vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.lead {
  margin-top: 24px;
  font-size: clamp(16.5px, 1.6vw, 19px);
  line-height: 1.65;
  color: var(--ink-muted);
}

/* ---------- motivation panels ---------- */

.reason-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-top: clamp(40px, 5vw, 64px);
}

.panel {
  padding: 28px;
  background: var(--paper-panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
}

.kicker { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.1em; color: #7A7365; }
.panel-title { margin-top: 14px; font-size: 21px; line-height: 1.25; }
.panel-text { margin-top: 12px; color: var(--ink-muted); }

/* ---------- prototype card ---------- */

.card {
  max-width: 1040px;
  margin-top: clamp(36px, 5vw, 56px);
  padding: clamp(22px, 3vw, 44px);
  background: var(--paper-panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  background: var(--assume-bg);
  color: #22407A;
  border: 1px solid var(--assume-border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card-title {
  margin-top: 16px;
  font-size: clamp(24px, 2.6vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.card-body {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 40px;
  margin-top: 28px;
  align-items: start;
}

.card-aside { display: flex; flex-direction: column; }
.card-text { margin-top: 14px; color: var(--ink-soft); line-height: 1.7; }
.card-text + .card-text { margin-top: 18px; }
.card-aside .btn { margin-top: 28px; }

.url-placeholder { margin-top: 10px; font-family: var(--font-mono); font-size: 12px; color: #7A7365; }

/* ---------- screenshot / editor stand-in ---------- */

.shot { margin: 0; }
.shot img { display: block; width: 100%; border: 1px solid #DCD4C4; border-radius: var(--radius-md); }
.embed {
  position: relative;
  aspect-ratio: 16 / 10;
  min-height: 420px;
  background: var(--paper-app);
  border: 1px solid #DCD4C4;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.embed-note {
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--ink-faint);
}

@media (max-width: 700px) {
  .embed { display: none; }
}

.app {
  background: var(--paper-app);
  border: 1px solid #DCD4C4;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.app-bar {
  height: 46px;
  padding-inline: 14px;
  background: var(--paper-inset);
  border-bottom: 1px solid #E6DFD0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.app-bar-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.app-check {
  padding: 8px 12px;
  background: var(--accent);
  color: var(--on-accent);
  border: none;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}
.app-check:hover { background: var(--accent-dark); }

.app-body { display: flex; align-items: stretch; }

.palette {
  flex: 0 0 150px;
  padding: 14px 12px;
  background: var(--paper-inset);
  border-right: 1px solid #E6DFD0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.palette-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.chip {
  padding: 7px 9px;
  background: var(--paper-app);
  border: 1px dashed var(--rule-dashed);
  border-radius: 7px;
  font-size: 11px;
  color: var(--ink-soft);
}

.proof { flex: 1 1 auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; }

.goal {
  padding-bottom: 10px;
  border-bottom: 1px dotted #D6CDBA;
  font-size: 11.5px;
  color: var(--ink-muted);
}

.block { padding: 7px 10px; border: 1px solid; border-radius: var(--radius-sm); }
.block-label { display: block; font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; }
.block-text { display: block; margin-top: 3px; font-family: var(--font-mono); font-size: 12px; }

.block-assume { background: var(--assume-bg); border-color: var(--assume-border); }
.block-assume .block-label { color: var(--assume-label); }
.block-assume .block-text { color: var(--assume-text); }

.block-step {
  background: #FFFFFF;
  border-color: #D6CDBA;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.block-step .block-label { color: var(--ink-faint); }
.block-step .block-text { color: var(--ink); }

.justification {
  flex: 0 0 auto;
  padding: 3px 7px;
  background: #F2EDE2;
  border-radius: 5px;
  font-size: 9.5px;
  color: var(--ink-faint);
}

.block-conclusion { background: var(--conclude-bg); border-color: var(--conclude-border); }
.block-conclusion .block-label { color: var(--conclude-label); }
.block-conclusion .block-text { color: var(--conclude-text); }

.block-slot {
  padding: 11px 10px;
  border: 1px dashed #C3B9A4;
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: #7A7365;
  text-align: center;
}

/* ---------- footer ---------- */

.site-footer { border-top: 1px solid var(--rule); }

.footer-inner {
  padding-block: 40px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-faint);
}

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

@media (max-width: 900px) {
  .reason-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .card-body { grid-template-columns: minmax(0, 1fr); gap: 24px; }
}

@media (max-width: 640px) {
  .button-row { flex-direction: column; align-self: stretch; gap: 12px; }
  .button-row .btn { display: block; }
  .palette { display: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; padding-block: 28px; }
}

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