/* MISHA site base styles.
   Tokens ported 1:1 from the app: MiraCore/Design/MiraTheme.swift ("Mira Paper" light,
   "Mira Ink" dark), Theme.swift (radius/spacing/motion), PaperStyle.swift (patterns).
   No frameworks, no external requests. */

@font-face {
  font-family: "Fraunces";
  src: url("../fonts/fraunces-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-stretch: normal;
  font-display: swap;
}

:root {
  /* Mira Paper (light) */
  --paper-50: #f2f1ec;
  --paper-100: #f8f7f2;
  --paper-200: #c5d7ca;
  --paper-300: #8fa797;
  --ink-900: #07120b;
  --ink-700: #1f2d25;
  --ink-500: #34423a;
  --ink-300: #5b6a61;
  --sage-100: #e5f1e7;
  --sage-300: #6baf85;
  --sage-500: #08753c;
  --sage-900: #064a27;
  --clay: #b25e2e;
  --edge: #ffffff;
  --on-accent: #ffffff;
  --shadow: 0 3px 7px rgb(7 18 11 / 0.1);

  /* shape: app MiraRadius card/control/panel */
  --r-card: 10px;
  --r-control: 22px;
  --r-panel: 28px;

  /* motion: app MiraMotion fast/base/slow */
  --t-fast: 120ms;
  --t-base: 200ms;
  --t-slow: 320ms;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --wrap: 1100px;
  --grain-opacity: 0.05;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Mira Ink (dark) */
    --paper-50: #07120b;
    --paper-100: #101812;
    --paper-200: #2d4034;
    --paper-300: #5c7767;
    --ink-900: #f4fbf5;
    --ink-700: #e2ede4;
    --ink-500: #d4e2d7;
    --ink-300: #9cad9f;
    --sage-100: #152119;
    --sage-300: #1e6b43;
    --sage-500: #2aba6b;
    --sage-900: #6fd89e;
    --clay: #e29a62;
    --edge: #edebe4;
    --on-accent: #07120b;
    --shadow: 0 3px 9px rgb(0 0 0 / 0.45);
    --grain-opacity: 0.07;
  }
}

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

body {
  margin: 0;
  background: var(--paper-50);
  color: var(--ink-700);
  font-family: ui-sans-serif, -apple-system, "SF Pro Text", system-ui, "Segoe UI", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

[hidden] {
  display: none !important;
}

/* e-ink grain, ported from EInkGrain.swift: fixed, non-interactive, whole page */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='128' height='128'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='128' height='128' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  background-size: 128px 128px;
  mix-blend-mode: multiply;
}

@media (prefers-color-scheme: dark) {
  body::after {
    mix-blend-mode: screen;
  }

  /* line-art sketches: flip dark ink to light, hue-rotate keeps sage green */
  img[src*="sketch-"] {
    filter: invert(0.88) hue-rotate(180deg);
  }
}

/* ---------- type ---------- */
h1,
h2,
h3 {
  font-family: "Fraunces", ui-serif, Georgia, serif;
  font-variation-settings: "SOFT" 30, "WONK" 0;
  color: var(--ink-900);
  letter-spacing: -0.012em;
  line-height: 1.14;
  margin: 0 0 0.5em;
  font-weight: 500;
}

h1 {
  font-size: clamp(2.35rem, 5.4vw, 3.6rem);
}

h2 {
  font-size: clamp(1.65rem, 3.2vw, 2.3rem);
}

h3 {
  font-size: 1.25rem;
  line-height: 1.3;
}

p {
  margin: 0 0 1em;
}

.lead {
  font-size: 1.2rem;
  color: var(--ink-500);
  max-width: 34ch;
}

.muted {
  color: var(--ink-300);
}

/* app miraEyebrow: mono 11pt semibold uppercase tracking 1.4 (rationed: max one per few sections) */
.eyebrow {
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-300);
}

a {
  color: var(--sage-500);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--sage-900);
}

::selection {
  background: var(--sage-100);
  color: var(--ink-900);
}

:focus-visible {
  outline: 2px solid var(--sage-500);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 100;
  background: var(--paper-100);
  padding: 10px 18px;
  border-radius: var(--r-control);
}

.skip-link:focus {
  left: 8px;
}

/* ---------- layout ---------- */
.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}

.section {
  padding-block: clamp(64px, 9vw, 118px);
}

.hairline {
  border: 0;
  border-top: 1px solid var(--paper-200);
  margin: 0;
}

/* ---------- buttons (app: 44pt tap, r22 pill, press scale) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 24px;
  border-radius: var(--r-control);
  font: 600 1rem/1 ui-sans-serif, -apple-system, system-ui, sans-serif;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--t-base) var(--ease), color var(--t-base) var(--ease),
    border-color var(--t-base) var(--ease), transform var(--t-fast) var(--ease);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--sage-500);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--sage-900);
  color: var(--on-accent);
}

@media (prefers-color-scheme: dark) {
  .btn-primary:hover {
    background: var(--sage-300);
  }
}

.btn-ghost {
  background: transparent;
  color: var(--ink-700);
  border-color: var(--paper-300);
}

.btn-ghost:hover {
  border-color: var(--ink-500);
  color: var(--ink-900);
}

/* ---------- nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper-50) 86%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--paper-200);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink-900);
  font-family: "Fraunces", ui-serif, Georgia, serif;
  font-size: 1.2rem;
  font-weight: 560;
  letter-spacing: 0.01em;
  margin-right: auto;
}

.brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.site-nav a:not(.brand):not(.btn) {
  color: var(--ink-500);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:not(.brand):not(.btn):hover {
  color: var(--ink-900);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

/* ---------- paper patterns (PaperStyle.swift specs, web-quiet opacities) ---------- */
.paper-dots {
  background-image: radial-gradient(
    circle,
    color-mix(in srgb, var(--ink-900) 14%, transparent) 1.3px,
    transparent 1.3px
  );
  background-size: 22px 22px;
}

.paper-lines {
  background-image: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--ink-900) 10%, transparent) 0.75px,
    transparent 0.75px
  );
  background-size: 100% 30px;
}

.paper-grid {
  background-image:
    linear-gradient(color-mix(in srgb, var(--ink-900) 8%, transparent) 0.6px, transparent 0.6px),
    linear-gradient(90deg, color-mix(in srgb, var(--ink-900) 8%, transparent) 0.6px, transparent 0.6px);
  background-size: 26px 26px;
}

/* ---------- cards ---------- */
.card {
  background: var(--paper-100);
  border: 1px solid var(--paper-200);
  border-radius: var(--r-card);
}

.panel {
  background: var(--paper-100);
  border: 1px solid var(--paper-200);
  border-radius: var(--r-panel);
}

/* washi tape strip: Japanese-stationery fastener for sketches pinned on paper */
.washi {
  position: absolute;
  top: -9px;
  left: 50%;
  width: 74px;
  height: 20px;
  transform: translateX(-50%) rotate(-2deg);
  background: color-mix(in srgb, var(--sage-300) 42%, transparent);
  border-left: 1px dashed color-mix(in srgb, var(--ink-900) 18%, transparent);
  border-right: 1px dashed color-mix(in srgb, var(--ink-900) 18%, transparent);
  border-radius: 2px;
}

.washi.clay {
  background: color-mix(in srgb, var(--clay) 34%, transparent);
}

.tilt-l {
  transform: rotate(-1.25deg);
}

.tilt-r {
  transform: rotate(1.25deg);
}

/* ---------- reveal on scroll (MOTION dial 4: fluid CSS only) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .js .reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
    transition-delay: var(--reveal-delay, 0ms);
  }

  .js .reveal.in-view {
    opacity: 1;
    transform: none;
  }

  .js .reveal.in-view.tilt-l {
    transform: rotate(-1.25deg);
  }

  .js .reveal.in-view.tilt-r {
    transform: rotate(1.25deg);
  }
}

/* ---------- prose pages (about / privacy / support) ---------- */
.page-head {
  padding-block: clamp(48px, 7vw, 88px) clamp(20px, 3vw, 36px);
}

.prose {
  max-width: 66ch;
  padding-bottom: clamp(64px, 9vw, 110px);
}

.prose h2 {
  font-size: 1.45rem;
  margin-top: 2.2em;
}

.prose h3 {
  margin-top: 1.6em;
}

.prose li {
  margin-bottom: 0.45em;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--paper-200);
  margin: 2.4em 0;
}

.prose .aside {
  border-left: 2px solid var(--sage-300);
  padding: 2px 0 2px 18px;
  color: var(--ink-500);
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--paper-200);
  padding-block: 44px 52px;
  font-size: 0.95rem;
  color: var(--ink-300);
}

.site-footer .cols {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 40px;
  align-items: baseline;
  justify-content: space-between;
}

.site-footer nav {
  display: flex;
  gap: 22px;
}

.site-footer a {
  color: var(--ink-500);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--ink-900);
  text-decoration: underline;
}

.footer-line {
  margin-top: 20px;
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .nav-links {
    gap: 16px;
  }

  .nav-links a[data-secondary] {
    display: none;
  }

  .site-footer .cols {
    flex-direction: column;
  }
}