/* Dropack — deep green on warm off-white. No web fonts, no gradients, no scripts. */

:root {
  --paper: #f5f0e6;
  --paper-2: #ece4d4;
  --ink: #1b2a22;
  --ink-soft: #4a5a51;
  --green: #1f4a38;
  --green-deep: #143326;
  --green-ink: #f3eee2;
  --kraft: #c8a46e;
  --kraft-soft: #e3cfa9;
  --line: #d6cdb9;
  --focus: #b5541c;

  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC",
    "Noto Sans CJK SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC", "Noto Serif SC",
    "Source Han Serif SC", "Noto Serif CJK SC", Georgia, serif;
  --display: var(--sans);

  --step--1: clamp(0.84rem, 0.8rem + 0.2vw, 0.92rem);
  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
  --step-1: clamp(1.16rem, 1.08rem + 0.4vw, 1.32rem);
  --step-2: clamp(1.45rem, 1.25rem + 1vw, 2rem);
  --step-3: clamp(1.9rem, 1.5rem + 2vw, 3rem);
  --step-4: clamp(2.3rem, 1.6rem + 3.6vw, 4.6rem);

  --gutter: clamp(1.25rem, 4vw, 3rem);
  --space-section: clamp(4.5rem, 10vw, 9rem);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);

  color-scheme: light dark;
}

:root:lang(en) { --display: var(--serif); }

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #10251c;
    --paper-2: #163126;
    --ink: #efe9dc;
    --ink-soft: #b9c2b8;
    --green: #8fc3a5;
    --green-deep: #0b1b14;
    --green-ink: #efe9dc;
    --kraft: #c9a670;
    --kraft-soft: #5b4a30;
    --line: #2c4639;
    --focus: #f0a46b;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

:lang(en) body, body:lang(en) { line-height: 1.6; }

h1, h2, h3 {
  font-family: var(--display);
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 1em; text-wrap: pretty; }

a { color: var(--green); text-underline-offset: 0.22em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

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

.wrap {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: max(var(--gutter), env(safe-area-inset-left)) max(var(--gutter), env(safe-area-inset-right));
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--green);
  color: var(--green-ink);
  border-radius: 6px;
}
.skip:focus { top: 1rem; }

/* ——— Header ——— */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: saturate(1.2) blur(10px);
  backdrop-filter: saturate(1.2) blur(10px);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.75rem;
}

.brand, .footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.22rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}

.mark { width: 1.6rem; height: 1.6rem; flex: none; }
.mark-box { fill: var(--kraft-soft); stroke: var(--green); stroke-width: 1.8; stroke-linejoin: round; }
.mark-fold { fill: none; stroke: var(--green); stroke-width: 1.8; stroke-linejoin: round; }
.mark-tape { fill: none; stroke: var(--green); stroke-width: 3; stroke-linecap: round; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2.5vw, 1.8rem);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--step--1);
}

.nav-list a {
  color: var(--ink);
  text-decoration: none;
  padding-block: 0.5rem;
}
.nav-list a:hover, .nav-list a[aria-current="page"] { color: var(--green); text-decoration: underline; }

.nav-list .lang {
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
}
.nav-list .lang:hover { background: var(--ink); color: var(--paper); text-decoration: none; }

@media (max-width: 40rem) {
  .nav-optional { display: none; }
}

/* ——— Shared section type ——— */

main section { padding-block: var(--space-section); }

.kicker, .eyebrow {
  margin-bottom: 1.1rem;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--green);
}
:lang(en) .kicker, :lang(en) .eyebrow { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.78rem; }

h2 {
  font-size: var(--step-3);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  max-width: 18em;
  margin-bottom: 1.4rem;
}
:lang(en) h2 { font-weight: 600; line-height: 1.12; letter-spacing: -0.015em; }

.lede { font-size: var(--step-1); color: var(--ink-soft); max-width: 34em; }

/* ——— Hero ——— */

.hero { padding-block: clamp(3rem, 8vw, 7rem) clamp(3.5rem, 8vw, 6rem); }

.hero-grid {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (min-width: 56rem) {
  .hero-grid { grid-template-columns: 1.15fr 0.85fr; }
}

h1 {
  font-size: var(--step-4);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 1.6rem;
}
h1 span { display: block; }
@media (min-width: 56rem) { h1 span { white-space: nowrap; } }
h1 span + span { color: var(--green); }
:lang(en) h1 { font-weight: 600; line-height: 1.04; letter-spacing: -0.025em; }

.cta-row { margin: 2rem 0 1.4rem; }

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 3rem;
  padding: 0.7rem 1.4rem;
  background: var(--green);
  color: var(--green-ink);
  font-weight: 600;
  text-decoration: none;
  border-radius: 999px;
  transition: transform 0.4s var(--ease-out), background-color 0.2s;
}
.cta:hover { background: var(--green-deep); transform: translateY(-1px); }
.cta span { transition: transform 0.4s var(--ease-out); }
.cta:hover span { transform: translateY(2px); }

@media (prefers-color-scheme: dark) {
  .cta { color: #10251c; }
  .cta:hover { background: var(--ink); }
}

.status-line {
  max-width: 30em;
  padding-left: 0.9rem;
  border-left: 2px dotted var(--kraft);
  font-size: var(--step--1);
  color: var(--ink-soft);
}

/* Hero illustration: four frames settle into an open parcel. */

.hero-art { margin: 0; }
.hero-art svg { display: block; width: 100%; max-width: 30rem; height: auto; margin-inline: auto; overflow: visible; }

.box-back { fill: var(--kraft); opacity: 0.55; }
.box-front { fill: var(--kraft-soft); stroke: var(--green); stroke-width: 2.5; stroke-linejoin: round; }
.flap { fill: var(--kraft-soft); stroke: var(--green); stroke-width: 2.5; stroke-linejoin: round; transform-box: fill-box; }
.flap-l { transform-origin: 100% 100%; }
.flap-r { transform-origin: 0% 100%; }
.box-tape { fill: var(--green); }
.box-seam { stroke: var(--green-ink); stroke-width: 1.5; stroke-dasharray: 6 6; opacity: 0.7; }
.box-label rect { fill: var(--paper); stroke: var(--green); stroke-width: 1.5; }
.box-label path { stroke: var(--green); stroke-width: 2; stroke-linecap: round; opacity: 0.7; }

.f-paper { fill: var(--paper); stroke: var(--green); stroke-width: 2.5; }
.f-hill { fill: var(--green); opacity: 0.85; }
.f-sun { fill: var(--kraft); }
.f-play { fill: var(--green); }
.frame { transform-box: fill-box; transform-origin: 50% 50%; }
.frame-1 { transform: rotate(-7deg); }
.frame-2 { transform: rotate(5deg); }
.frame-3 { transform: rotate(9deg); }
.frame-4 { transform: rotate(-2deg); }

@media (prefers-reduced-motion: no-preference) {
  .frame { animation: settle 1.1s var(--ease-out) both; }
  .frame-1 { --r: -7deg; animation-delay: 0.15s; }
  .frame-2 { --r: 5deg; animation-delay: 0.3s; }
  .frame-3 { --r: 9deg; animation-delay: 0.45s; }
  .frame-4 { --r: -2deg; animation-delay: 0.6s; }
  .flap-l { animation: flap-l 1.4s var(--ease-out) 0.2s both; }
  .flap-r { animation: flap-r 1.4s var(--ease-out) 0.2s both; }

  @keyframes settle {
    from { opacity: 0; transform: translateY(-46px) rotate(calc(var(--r) * -1)); }
    to { opacity: 1; transform: translateY(0) rotate(var(--r)); }
  }
  @keyframes flap-l { from { transform: rotate(-26deg); } to { transform: rotate(0); } }
  @keyframes flap-r { from { transform: rotate(26deg); } to { transform: rotate(0); } }
}

/* Perforated divider: the "tear here" line of a parcel. */
.tear {
  max-width: 72rem;
  margin-inline: auto;
  height: 0;
  border-top: 2px dashed var(--line);
  margin-top: 0;
}

/* ——— Two actions ——— */

.split {
  display: grid;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}
@media (min-width: 52rem) {
  .split { grid-template-columns: 1fr minmax(15rem, 20rem); }
}
.split-copy > p { max-width: 32em; color: var(--ink-soft); }

.action-key { list-style: none; margin: 2rem 0 0; padding: 0; }
.action-key li {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding-block: 0.85rem;
  border-top: 1px solid var(--line);
}
.action-key li:last-child { border-bottom: 1px solid var(--line); }
.key { flex: none; width: 0.85rem; height: 0.85rem; border-radius: 3px; transform: translateY(0.1rem); }
.key-primary { background: var(--green); }
.key-secondary { border: 2px solid var(--green); }

.phone-art, .progress-art { margin: 0; }
.phone-art svg { display: block; width: 100%; max-width: 17rem; height: auto; margin-inline: auto; }
figcaption {
  margin-top: 0.9rem;
  text-align: center;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.ph-body { fill: var(--ink); }
.ph-screen { fill: var(--paper); }
.ph-island { fill: var(--ink); }
.ph-title { font-family: var(--serif); font-size: 22px; font-weight: 600; fill: var(--ink); }
.ph-btn-primary { fill: var(--green); }
.ph-btn-secondary { fill: none; stroke: var(--green); stroke-width: 2.5; }
.ph-btn-label { font-family: var(--sans); font-size: 21px; font-weight: 700; fill: var(--ink); }
.ph-btn-hint { font-family: var(--sans); font-size: 12px; fill: var(--ink-soft); }
:lang(en) .ph-btn-label { font-size: 16px; }
:lang(en) .ph-btn-hint { font-size: 11.5px; }
.ph-on-primary { fill: var(--green-ink); }
@media (prefers-color-scheme: dark) {
  .ph-body, .ph-island { fill: #050d09; }
  .ph-on-primary { fill: #10251c; }
}
.ph-mark .mark-box { fill: var(--kraft-soft); }

/* ——— How it works ——— */

.how { background: var(--paper-2); }

.how-grid {
  display: grid;
  gap: clamp(2.5rem, 6vw, 5rem);
  margin-top: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}
@media (min-width: 56rem) {
  .how-grid { grid-template-columns: 1.2fr 0.8fr; }
  .progress-art { position: sticky; top: 7rem; }
}

.steps { list-style: none; margin: 0; padding: 0; }

.step {
  position: relative;
  display: grid;
  grid-template-columns: 3.4rem 1fr;
  gap: 0.25rem 1.25rem;
  padding-bottom: clamp(2rem, 5vw, 3rem);
}
/* The dashed route a parcel travels, from step to step. */
.step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 1.2rem;
  top: 3.2rem;
  bottom: 0.6rem;
  border-left: 2px dashed var(--kraft);
}

.step-n {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border: 2px solid var(--green);
  border-radius: 50%;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--green);
  background: var(--paper-2);
  font-variant-numeric: tabular-nums;
}

.step h3 { font-size: var(--step-2); font-weight: 700; line-height: 1.3; margin: 0.15rem 0 0.6rem; }
:lang(en) .step h3 { font-weight: 600; }
.step p { color: var(--ink-soft); max-width: 34em; margin: 0; }

.progress-art svg { display: block; width: 100%; max-width: 24rem; height: auto; margin-inline: auto; }
.pg-panel { fill: var(--paper); stroke: var(--line); stroke-width: 1.5; }
.pg-title { font-family: var(--sans); font-size: 16px; font-weight: 700; fill: var(--ink); }
.pg-count { font-family: var(--sans); font-size: 14px; fill: var(--ink-soft); font-variant-numeric: tabular-nums; }
.pg-track { fill: var(--line); }
.pg-fill { fill: var(--green); }
.pg-thumb { stroke-width: 1.5; }
.pg-done { fill: var(--kraft-soft); stroke: var(--kraft); }
.pg-warn { fill: var(--kraft-soft); stroke: var(--focus); }
.pg-todo { fill: none; stroke: var(--line); stroke-dasharray: 4 4; }
.pg-badge-done { fill: var(--green); }
.pg-badge-warn { fill: var(--focus); }
.pg-check, .pg-bang { fill: none; stroke: var(--paper); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.pg-chip { fill: none; stroke: var(--green); stroke-width: 1.5; }
.pg-chip-label { font-family: var(--sans); font-size: 14px; font-weight: 600; fill: var(--green); }
.pg-review { font-family: var(--sans); font-size: 14px; font-weight: 600; fill: var(--focus); text-decoration: underline; }

@media (prefers-reduced-motion: no-preference) {
  .pg-fill { transform-box: fill-box; transform-origin: left; animation: fill 2.4s var(--ease-out) 0.3s both; }
  @keyframes fill { from { transform: scaleX(0.2); } to { transform: scaleX(1); } }
}

/* ——— Notes ——— */

.note-list { margin: clamp(1.5rem, 4vw, 3rem) 0 0; }
.note {
  display: grid;
  gap: 0.4rem 2rem;
  padding-block: 1.4rem;
  border-top: 1px solid var(--line);
}
.note:last-child { border-bottom: 1px solid var(--line); }
@media (min-width: 48rem) {
  .note { grid-template-columns: minmax(12rem, 1fr) 2fr; }
}
.note dt { font-weight: 700; font-size: var(--step-1); line-height: 1.4; }
.note dd { margin: 0; color: var(--ink-soft); max-width: 38em; }

/* ——— Privacy band ——— */

.privacy-band { background: var(--green); color: var(--green-ink); }
.privacy-band h2, .privacy-band .kicker { color: var(--green-ink); }
.privacy-band p { color: color-mix(in srgb, var(--green-ink) 86%, var(--green)); max-width: 34em; }
.band-grid { display: grid; gap: 1.5rem clamp(2rem, 6vw, 5rem); }
@media (min-width: 52rem) { .band-grid { grid-template-columns: 1fr 1fr; align-items: end; } }
.privacy-band .band-link { color: var(--green-ink); font-weight: 600; }
@media (prefers-color-scheme: dark) {
  .privacy-band { background: var(--paper-2); }
  .privacy-band h2 { color: var(--ink); }
  .privacy-band .kicker, .privacy-band .band-link { color: var(--green); }
  .privacy-band p { color: var(--ink-soft); }
}

.band-link { font-weight: 600; }

/* ——— Status ——— */

.status-grid > p:last-child { max-width: 36em; color: var(--ink-soft); font-size: var(--step-1); }

/* ——— Footer ——— */

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2.5rem calc(2.5rem + env(safe-area-inset-bottom));
  font-size: var(--step--1);
  color: var(--ink-soft);
}
.footer-row { display: grid; gap: 0.6rem; }
.footer-brand { margin: 0 0 0.4rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; }
.footer-links a { color: var(--ink); }
.fine { margin: 0; font-size: 0.8rem; }

/* ——— Document pages (privacy, 404) ——— */

.doc { padding-block: clamp(3rem, 8vw, 6rem); }
.doc-wrap { max-width: 46rem; }
.doc h1 { font-size: var(--step-3); }
.doc h2 { font-size: var(--step-2); margin: 2.6rem 0 0.8rem; }
.doc ul { margin: 0; padding-left: 1.2rem; }
.doc li { margin-bottom: 0.7rem; color: var(--ink-soft); }
.doc li::marker { color: var(--kraft); }
.doc-end { margin-top: 2.6rem; padding-top: 1.4rem; border-top: 1px solid var(--line); color: var(--ink-soft); }

.not-found .hero-art svg { max-width: 16rem; margin: 0 0 2rem; }
.empty-box .frame { display: none; }

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

@media print {
  .site-header, .skip, .cta-row { display: none; }
  body { background: #fff; color: #000; }
}