/* Saved & Calm · base + app layout (bottom tab bar on phones, sidebar from 900px). */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.55;
  font-weight: 350;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

/* Paper grain: a quiet texture so the app feels like a notebook, not a spreadsheet. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: var(--grain-opacity);
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .35 0 0 0 0 .3 0 0 0 0 .2 0 0 0 .09 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
:root[data-theme="dark"] body::before { mix-blend-mode: screen; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body::before { mix-blend-mode: screen; }
}

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-variation-settings: var(--soft);
  font-weight: 560;
  line-height: 1.1;
  letter-spacing: -.01em;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: var(--step-3); }
h2 { font-size: var(--step-2); }
h3 { font-size: var(--step-1); }
p { margin: 0; text-wrap: pretty; }
a { color: var(--accent); text-underline-offset: .18em; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

.money, .num { font-variant-numeric: tabular-nums lining-nums; }

:focus { outline: none; }
:focus-visible { outline: none; box-shadow: var(--ring); border-radius: var(--r-xs); }

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

.skip {
  position: fixed;
  left: var(--s-4);
  top: -100px;
  z-index: 100;
  padding: var(--s-3) var(--s-4);
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: var(--r-sm);
  text-decoration: none;
}
.skip:focus-visible { top: var(--s-4); }

/* ── Demo banner ───────────────────────────────────── */
.demo-banner {
  position: relative;
  z-index: 30;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--s-2);
  min-height: 36px;
  padding: 6px var(--s-4);
  background: var(--forest);
  color: #F6F3EB;
  font-size: var(--step--1);
  text-align: center;
}
.demo-banner[hidden] { display: none; }
.demo-banner a { color: var(--gold); font-weight: 500; }

/* ── App frame ─────────────────────────────────────── */
.app {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  min-height: 60px;
  padding: var(--s-2) var(--s-4);
  padding-top: calc(var(--s-2) + env(safe-area-inset-top));
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.topbar[data-scrolled] { border-bottom-color: var(--line); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  border-radius: var(--r-sm);
}
.brand__mark { width: 34px; height: 34px; flex: none; }
.brand__word {
  font-family: var(--font-display);
  font-variation-settings: var(--soft);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -.015em;
  white-space: nowrap;
}
.brand__amp {
  color: var(--gold);
  font-style: italic;
  font-weight: 500;
  padding: 0 .04em;
}

.main {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: var(--s-4) var(--s-4) var(--s-7);
}

/* ── Navigation: bottom tab bar on phones ──────────── */
.nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 25;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.nav__brand, .nav__foot { display: none; }
.nav__list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin: 0;
  padding: 6px 6px;
  list-style: none;
  height: var(--tabbar-h);
}
.nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-height: 44px;
  height: 100%;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .72rem;
  font-weight: 450;
  letter-spacing: .01em;
  border-radius: var(--r-sm);
  transition: color .2s;
}
.nav__icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 30px;
  font-size: 1.2rem;
  line-height: 1;
  border-radius: var(--r-pill);
  transition: background-color .25s var(--ease), transform .25s var(--ease);
}
.nav__link[aria-current="page"] { color: var(--accent-strong); font-weight: 550; }
.nav__link[aria-current="page"] .nav__icon { background: var(--accent-wash); transform: translateY(-1px); }
.nav__link:hover .nav__icon { background: var(--surface-2); }
.nav__link[aria-current="page"]:hover .nav__icon { background: var(--accent-wash); }

/* ── Sidebar from 900px ────────────────────────────── */
@media (min-width: 900px) {
  .app {
    display: grid;
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
    grid-template-rows: auto 1fr;
    padding-bottom: 0;
  }
  .topbar { grid-column: 2; }
  .topbar .brand { visibility: hidden; }
  .main { grid-column: 2; padding: var(--s-5) var(--s-6) var(--s-8); }

  .nav {
    grid-column: 1;
    grid-row: 1 / span 2;
    position: sticky;
    top: 0;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    gap: var(--s-5);
    padding: var(--s-5) var(--s-4);
    border-top: 0;
    border-right: 1px solid var(--line);
    background: color-mix(in srgb, var(--surface) 70%, transparent);
  }
  .nav__brand { display: flex; padding: 0 var(--s-2); }
  .nav__brand .brand__mark { width: 40px; height: 40px; }
  .nav__brand .brand__word { font-size: 1.4rem; }
  .nav__list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    height: auto;
    padding: 0;
  }
  .nav__link {
    flex-direction: row;
    justify-content: flex-start;
    gap: var(--s-3);
    min-height: 48px;
    padding: 0 var(--s-3) 0 var(--s-2);
    font-size: var(--step-0);
    border-radius: var(--r-sm);
  }
  .nav__icon { width: 36px; height: 36px; border-radius: 11px; font-size: 1.15rem; }
  .nav__link:hover { background: var(--surface-2); }
  .nav__link:hover .nav__icon { background: transparent; }
  .nav__link[aria-current="page"] { background: var(--accent-wash); }
  .nav__link[aria-current="page"] .nav__icon { background: var(--surface); transform: none; box-shadow: var(--shadow-1); }
  .nav__foot {
    display: block;
    margin-top: auto;
    padding: var(--s-3);
    font-size: var(--step--1);
    color: var(--ink-soft);
    border: 1px dashed var(--line-strong);
    border-radius: var(--r-sm);
  }
}

@media (min-width: 1280px) {
  .main { max-width: 1180px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}