/* =========================================================================
   Spare Tokens — design system  ·  "Terminal" theme
   Plain CSS, no build step. Custom properties + fluid type + responsive grid.
   Engineer's-terminal aesthetic: mono headings, phosphor-green accent, faint
   grid texture. Fonts are self-hosted (no third-party CDN — keeps the privacy
   promise and the strict CSP intact).
   ========================================================================= */

/* ---- Self-hosted fonts (variable woff2, Latin subset) ------------------ */
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../assets/fonts/terminal-mono.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../assets/fonts/terminal-sans.woff2") format("woff2");
}

/* ---- Reset ------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { line-height: 1.6; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img, svg, picture { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---- Tokens ------------------------------------------------------------ */
:root {
  /* Brand palette — "Terminal": near-black with a faint green cast */
  --bg: #0a0f0d;
  --bg-alt: #0c1310;
  --surface: #0f1714;
  --surface-2: #131c18;
  --border: #1f2a25;
  --text: #d6e0d8;          /* soft off-white, never pure #fff */
  --text-dim: #9fb0a6;
  --text-faint: #7e9089;

  --accent: #5ef38c;        /* phosphor green */
  --accent-2: #3fd97a;
  --accent-3: #5ef38c;
  --accent-ink: #06120b;    /* dark ink for text on green buttons */

  --grad: linear-gradient(135deg, #74f79c 0%, #45e684 100%);

  /* Type — mono display (h1/h2/h3 below), sans body here */
  --font: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI",
          Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --step--1: clamp(0.83rem, 0.78rem + 0.2vw, 0.95rem);
  --step-0:  clamp(1rem, 0.95rem + 0.25vw, 1.13rem);
  --step-1:  clamp(1.2rem, 1.1rem + 0.5vw, 1.5rem);
  --step-2:  clamp(1.5rem, 1.3rem + 1vw, 2.1rem);
  --step-3:  clamp(2rem, 1.6rem + 2vw, 3.2rem);
  --step-4:  clamp(2.6rem, 1.9rem + 3.4vw, 4.6rem);

  /* Space + layout */
  --container: 72rem;
  --gutter: clamp(1.1rem, 0.6rem + 2.5vw, 2.5rem);
  --section-y: clamp(3.5rem, 2rem + 7vw, 7rem);
  --radius: 8px;            /* sharper, "engineered" geometry */
  --radius-lg: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.5), 0 16px 44px -18px rgba(0,0,0,.7);
  --shadow-glow: 0 0 0 1px rgba(94,243,140,.22), 0 0 28px -6px rgba(94,243,140,.32);

  --ease: cubic-bezier(.2,.6,.3,1);
}

/* This site commits to one fixed dark "Terminal" look regardless of OS scheme. */

/* ---- Base -------------------------------------------------------------- */
body {
  font-family: var(--font);
  font-size: var(--step-0);
  color: var(--text);
  background: var(--bg);
  /* A quiet engineering grid + scanlines + one phosphor wash (top-right). */
  background-image:
    repeating-linear-gradient(to right, rgba(94,243,140,.035) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(to bottom, rgba(94,243,140,.030) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(to bottom, rgba(255,255,255,.012) 0 1px, transparent 1px 3px),
    radial-gradient(50rem 36rem at 100% -8%, rgba(94,243,140,.10), transparent 62%);
  background-attachment: fixed, fixed, fixed, fixed;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--mono);
  line-height: 1.12;
  letter-spacing: -0.01em;   /* mono runs wide; ease it back */
  font-weight: 700;
}

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

.eyebrow {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--accent);
}
/* A quiet "> " prompt flourish on labels (decorative, pure CSS). */
.eyebrow::before { content: "> "; color: var(--accent); font-weight: 700; }

.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: -4rem;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: .6rem 1rem;
  border-radius: 10px;
  z-index: 100;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: .75rem; }

/* ---- Buttons ----------------------------------------------------------- */
.btn {
  --pad-y: .8rem;
  --pad-x: 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: var(--pad-y) var(--pad-x);
  border-radius: 999px;
  font-weight: 600;
  font-size: var(--step-0);
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform .18s var(--ease), box-shadow .25s var(--ease),
              background .2s var(--ease), border-color .2s var(--ease);
  will-change: transform;
}
.btn--sm { --pad-y: .55rem; --pad-x: 1rem; font-size: var(--step--1); }
.btn--primary {
  color: var(--accent-ink);
  background: var(--grad);
  background-size: 160% 160%;
  box-shadow: var(--shadow-glow);
}
.btn--primary:hover { transform: translateY(-2px); background-position: 100% 0; }
.btn--ghost {
  color: var(--text);
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border-color: var(--border);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--accent); }
.btn:active { transform: translateY(0); }

/* ---- Header / nav ------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.site-header[data-scrolled] {
  border-bottom-color: var(--border);
  background: color-mix(in oklab, var(--bg) 88%, transparent);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4.25rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -.02em;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 2rem; height: 2rem;
  border-radius: 9px;
  background: var(--grad);
  box-shadow: var(--shadow-glow);
}
.brand__mark svg { color: var(--accent-ink); }
.brand__name { font-size: var(--step-1); }
.brand--sm .brand__name { font-size: var(--step-0); }

.nav__links { display: flex; align-items: center; gap: clamp(.5rem, 2vw, 1.6rem); }
.nav__links > a:not(.btn) {
  text-decoration: none;
  color: var(--text-dim);
  font-weight: 500;
  padding: .4rem .2rem;
  position: relative;
  transition: color .2s var(--ease);
}
.nav__links > a:not(.btn)::after {
  content: "";
  position: absolute;
  left: .2rem; right: .2rem; bottom: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav__links > a:not(.btn):hover { color: var(--text); }
.nav__links > a:not(.btn):hover::after { transform: scaleX(1); }

.nav__toggle {
  display: none;
  width: 2.75rem; height: 2.75rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  position: relative;
}
.nav__toggle-bar {
  position: absolute;
  left: 50%; top: 50%;
  width: 1.1rem; height: 2px;
  background: var(--text);
  transform: translate(-50%, -50%);
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav__toggle-bar:first-child { transform: translate(-50%, -6px); }
.nav__toggle-bar:last-child { transform: translate(-50%, 6px); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:first-child { transform: translate(-50%, -50%) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:last-child { transform: translate(-50%, -50%) rotate(-45deg); }

.mobile-nav {
  display: grid;
  gap: .25rem;
  padding: .5rem var(--gutter) 1.25rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 95%, transparent);
  animation: slide-down .25s var(--ease);
}
/* The hidden attribute must win over display:grid (equal specificity, later source). */
.mobile-nav[hidden] { display: none; }
.mobile-nav a {
  text-decoration: none;
  color: var(--text-dim);
  font-weight: 500;
  padding: .85rem .5rem;
  border-radius: 10px;
}
.mobile-nav a:hover { color: var(--text); background: var(--surface); }
@keyframes slide-down { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

/* ---- Hero -------------------------------------------------------------- */
.hero { position: relative; padding-block: clamp(3.5rem, 2rem + 8vw, 8rem) var(--section-y); }
.hero__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(34rem 24rem at 74% 16%, rgba(94,243,140,.16), transparent 62%),
    radial-gradient(26rem 20rem at 12% 84%, rgba(63,217,122,.08), transparent 62%);
  filter: blur(10px);
  z-index: -1;
}
.hero__inner { max-width: 52rem; }
.hero__title { font-size: var(--step-4); margin-top: 1rem; }
.hero__lede {
  font-size: var(--step-1);
  color: var(--text-dim);
  margin-top: 1.25rem;
  max-width: 40ch;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }
.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
  padding: 0;
  margin-top: 2.5rem;
  color: var(--text-dim);
  font-size: var(--step--1);
}
.hero__chips li { display: inline-flex; align-items: center; gap: .5rem; }
.dot {
  width: .55rem; height: .55rem;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(124,140,255,.6);
}

/* ---- Sections ---------------------------------------------------------- */
.section { padding-block: var(--section-y); }
.section--alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}
.section__head { max-width: 42rem; margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.section__title { font-size: var(--step-3); margin-top: .6rem; }
.section__sub { color: var(--text-dim); margin-top: .9rem; font-size: var(--step-1); }
.section__sub a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in oklab, var(--accent) 40%, transparent); }
.section__sub a:hover { border-bottom-color: var(--accent); }

/* ---- App cards --------------------------------------------------------- */
.cards {
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
}
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1.4rem, 3vw, 2rem);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: .85rem;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  transform-style: preserve-3d;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); border-color: color-mix(in oklab, var(--accent) 50%, var(--border)); }
.card--muted { background: var(--surface-2); }
.card--cta {
  background: linear-gradient(160deg, color-mix(in oklab, var(--accent) 16%, var(--surface)), var(--surface));
  justify-content: space-between;
}
.card__badge {
  align-self: flex-start;
  font-size: var(--step--1);
  font-weight: 600;
  padding: .3rem .7rem;
  border-radius: 999px;
  color: var(--accent-ink);
  background: var(--grad);
}
.card__badge--soft {
  color: var(--accent);
  background: color-mix(in oklab, var(--accent) 16%, transparent);
}
.card__title { font-size: var(--step-2); }
.card__body { color: var(--text-dim); }
.card__stores { display: flex; gap: .5rem; margin-top: auto; padding-top: .5rem; }
.pill {
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .25rem .7rem;
  background: var(--bg-alt);
}

/* ---- Studio ------------------------------------------------------------ */
.studio {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 56rem) {
  .studio { grid-template-columns: 1.1fr .9fr; }
}
.studio__text p { color: var(--text-dim); margin-top: 1rem; max-width: 46ch; }
.studio__text p:first-of-type { margin-top: 1.25rem; }
.principles { list-style: none; padding: 0; display: grid; gap: 1rem; }
.principle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.principle:hover { transform: translateX(4px); border-color: color-mix(in oklab, var(--accent) 45%, var(--border)); }
.principle__icon {
  display: inline-grid;
  place-items: center;
  width: 2.4rem; height: 2.4rem;
  border-radius: 11px;
  font-size: 1.2rem;
  background: color-mix(in oklab, var(--accent) 14%, transparent);
  color: var(--accent);
  margin-bottom: .6rem;
}
.principle h3 { font-size: var(--step-1); }
.principle p { color: var(--text-dim); margin-top: .35rem; font-size: var(--step--1); }

/* ---- Contact strip ----------------------------------------------------- */
.contact__inner {
  text-align: center;
  max-width: 40rem;
  margin-inline: auto;
  display: grid;
  gap: 1.25rem;
  justify-items: center;
}

/* ---- Footer ------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding-top: clamp(2.5rem, 5vw, 4rem);
}
.footer {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  padding-bottom: 2rem;
}
@media (min-width: 48rem) {
  .footer { grid-template-columns: 1.5fr 1fr; align-items: start; }
}
.footer__tag { color: var(--text-dim); margin-top: .75rem; max-width: 30ch; font-size: var(--step--1); }
.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.4rem;
  align-content: start;
}
.footer__links a {
  text-decoration: none;
  color: var(--text-dim);
  font-weight: 500;
  transition: color .2s var(--ease);
}
.footer__links a:hover { color: var(--text); }
.footer__legal {
  border-top: 1px solid var(--border);
  padding-block: 1.5rem;
  color: var(--text-faint);
  font-size: var(--step--1);
}

/* ---- Reveal-on-scroll -------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---- Legal / content pages -------------------------------------------- */
.page {
  padding-block: clamp(3rem, 5vw, 5rem) var(--section-y);
}
.page__head { max-width: 46rem; margin-bottom: clamp(2rem, 4vw, 3rem); }
.page__head h1 { font-size: var(--step-3); margin-top: .6rem; }
.page__meta { color: var(--text-faint); font-size: var(--step--1); margin-top: 1rem; }
.prose {
  max-width: 44rem;
  color: var(--text-dim);
}
.prose h2 { font-size: var(--step-2); color: var(--text); margin-top: 2.5rem; }
.prose h3 { font-size: var(--step-1); color: var(--text); margin-top: 1.75rem; }
.prose p, .prose li { margin-top: .9rem; }
.prose ul { padding-left: 1.25rem; margin-top: .5rem; }
.prose li { padding-left: .25rem; }
.prose a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in oklab, var(--accent) 40%, transparent); }
.prose a:hover { border-bottom-color: var(--accent); }
.prose strong { color: var(--text); }
.callout {
  margin-top: 1.5rem;
  padding: 1.1rem 1.3rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
}

/* ---- Support FAQ ------------------------------------------------------- */
.faq { max-width: 44rem; display: grid; gap: .75rem; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .25rem 1.3rem;
  transition: border-color .2s var(--ease);
}
.faq details[open] { border-color: color-mix(in oklab, var(--accent) 45%, var(--border)); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: 1.05rem 0;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--accent);
  transition: transform .25s var(--ease);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > p { color: var(--text-dim); padding-bottom: 1.1rem; margin: 0; }

.support-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  margin-top: 1.5rem;
}
.support-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.support-card h3 { font-size: var(--step-1); }
.support-card p { color: var(--text-dim); margin-top: .5rem; font-size: var(--step--1); }
.support-card a { color: var(--accent); text-decoration: none; font-weight: 600; display: inline-block; margin-top: .75rem; }

/* ---- Motion / accessibility ------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}
html { scroll-behavior: smooth; }
html { scroll-padding-top: 5.5rem; }

/* ---- Responsive: nav collapse ----------------------------------------- */
@media (max-width: 47.99rem) {
  .nav__links { display: none; }
  .nav__toggle { display: inline-flex; }
}
@media (min-width: 48rem) {
  .mobile-nav { display: none !important; }
}

/* ---- "Terminal" theme: mono display + phosphor flourishes ------------- */
.brand__name { font-family: var(--mono); font-weight: 700; letter-spacing: -0.01em; }
.hero__title { letter-spacing: -0.02em; }
.brand__mark { border-radius: 6px; }

/* Blinking block cursor at the end of the hero title — the signature wink. */
.hero__title::after {
  content: "\2588";                /* full block █ */
  display: inline-block;
  margin-left: .12em;
  color: var(--accent);
  transform: translateY(-0.02em);
  animation: terminal-blink 1.15s steps(1, end) infinite;
}
@keyframes terminal-blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .hero__title::after { animation: none; opacity: 1; }
}

/* Buttons, badges, pills, FAQ marker, footer legal — set in mono on the grid. */
.btn { font-family: var(--mono); font-weight: 700; letter-spacing: .01em; }
.btn--primary { color: var(--accent-ink); }
.btn--ghost { background: color-mix(in oklab, var(--surface) 78%, transparent); }
.btn--ghost:hover { border-color: var(--accent); }
.card__badge { font-family: var(--mono); letter-spacing: .02em; }
.card__badge--soft { color: var(--accent); }
.pill { font-family: var(--mono); letter-spacing: .02em; }
.principle__icon {
  color: var(--accent);
  background: color-mix(in oklab, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent) 28%, transparent);
}
.faq summary { font-family: var(--mono); }
.footer__legal { font-family: var(--mono); letter-spacing: .01em; }