/* ── ArgusLeaf — Shared Styles ─────────────────────────
   Swiss / B direction: Space Grotesk + JetBrains Mono
   Palette: sis mavisi (#EDF0F5), amber signal
   ──────────────────────────────────────────────────── */

/* ── Design tokens ─────────────────────────────────── */
:root {
  --paper:       #EDF0F5;
  --paper-deep:  #E0E4EC;
  --paper-hover: #D4D9E4;
  --ink:         #111413;
  --ink-soft:    #3E4442;
  --mid:         #555C6A;
  --signal:      #9A6A10;
  --signal-lit:  #C48A18;
  --rule:        #C8CDD8;
  --warn:        #8B3A20;
  --font-sans:   "Space Grotesk", system-ui, sans-serif;
  --font-mono:   "JetBrains Mono", ui-monospace, monospace;
  --measure:     36rem;
  --gutter:      clamp(1.25rem, 5vw, 4rem);
  --radius:      2px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper:       #0F1219;
    --paper-deep:  #171C26;
    --paper-hover: #1E2430;
    --ink:         #E6E9EE;
    --ink-soft:    #A8B0BE;
    --mid:         #8A93A3;
    --signal:      #D4941E;
    --signal-lit:  #E8A824;
    --rule:        #252D3C;
    --warn:        #C25030;
  }
}
:root[data-theme="dark"] {
  --paper:       #0F1219;
  --paper-deep:  #171C26;
  --paper-hover: #1E2430;
  --ink:         #E6E9EE;
  --ink-soft:    #A8B0BE;
  --mid:         #8A93A3;
  --signal:      #D4941E;
  --signal-lit:  #E8A824;
  --rule:        #252D3C;
  --warn:        #C25030;
}
:root[data-theme="light"] {
  --paper:       #EDF0F5;
  --paper-deep:  #E0E4EC;
  --paper-hover: #D4D9E4;
  --ink:         #111413;
  --ink-soft:    #3E4442;
  --mid:         #555C6A;
  --signal:      #9A6A10;
  --signal-lit:  #C48A18;
  --rule:        #C8CDD8;
  --warn:        #8B3A20;
}

/* ── Reset ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  transition: background 0.2s ease, color 0.2s ease;
}

/* ── Layout ─────────────────────────────────────────── */
.sheet { max-width: 72rem; margin: 0 auto; padding: 0 var(--gutter) }

/* ── Typography ─────────────────────────────────────── */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mid);
  margin: 0 0 1.25rem;
}
h1, h2, h3, h4 { font-family: var(--font-sans); font-weight: 400; letter-spacing: -0.02em; margin: 0 }
h1 { font-size: clamp(2.75rem, 9vw, 5.5rem); line-height: 1.0; font-weight: 300 }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.5rem); line-height: 1.1; margin-bottom: 1rem }
h3 { font-size: 1.125rem; line-height: 1.3; margin-bottom: 0.5rem }
h4 { font-size: 0.9375rem; font-weight: 500; margin-bottom: 0.25rem }
p  { margin: 0 0 1rem; max-width: var(--measure) }
p:last-child { margin-bottom: 0 }

a { color: var(--ink); text-decoration: underline; text-underline-offset: 0.2em;
    text-decoration-thickness: 1px; text-decoration-color: var(--rule) }
a:hover { text-decoration-color: var(--ink) }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: var(--radius) }

ul, ol { padding-left: 1.25rem; margin: 0 0 1rem }
li { margin-bottom: 0.4rem; max-width: var(--measure) }
code, kbd { font-family: var(--font-mono); font-size: 0.875em;
  background: var(--paper-deep); padding: 0.1em 0.35em; border-radius: var(--radius) }

/* ── Masthead ───────────────────────────────────────── */
.masthead {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.25rem 0 1rem;
  border-bottom: 1px solid var(--rule);
}
.brand { display: flex; align-items: center; gap: 0.625rem; text-decoration: none; flex-shrink: 0 }
.brand:hover { text-decoration: none }
.logomark { width: 28px; height: 28px; flex-shrink: 0; border-radius: 50%; overflow: hidden }
.wordmark { font-family: var(--font-sans); font-size: 1.0625rem; font-weight: 700;
  letter-spacing: -0.01em; color: var(--ink) }
.wordmark em { color: var(--mid); font-weight: 300; font-style: normal }

.masthead-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex: 1;
  flex-wrap: wrap;
}
.masthead-nav a {
  font-size: 0.875rem;
  color: var(--ink-soft);
  text-decoration: none;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.masthead-nav a:hover { color: var(--ink) }
.masthead-nav a[aria-current="page"] { color: var(--ink); font-weight: 500 }

.masthead-actions { display: flex; align-items: center; gap: 0.625rem; flex-shrink: 0; flex-wrap: wrap }

.theme-btn {
  background: none;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.3rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
  line-height: 1;
}
.theme-btn:hover { border-color: var(--mid); color: var(--ink) }

/* ── Page header (sub-pages) ────────────────────────── */
.page-header {
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(1.5rem, 3vw, 2rem);
  border-bottom: 1px solid var(--rule);
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}
.page-header h1 { font-size: clamp(2rem, 6vw, 3.75rem) }

/* ── Content sections ───────────────────────────────── */
section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; border-bottom: 1px solid var(--rule) }
section:last-of-type { border-bottom: 0 }

.cols {
  display: grid;
  grid-template-columns: minmax(0, 10rem) minmax(0, 1fr);
  gap: clamp(1.25rem, 4vw, 3.5rem);
  align-items: start;
}
@media (max-width: 44rem) { .cols { grid-template-columns: 1fr; gap: 1rem } }

/* ── Buttons ────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.btn:hover { opacity: 0.82; text-decoration: none; color: var(--paper) }
.btn:disabled { opacity: 0.4; cursor: not-allowed }

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}
.btn-outline:hover { border-color: var(--mid); color: var(--ink); opacity: 1 }

.btn-signal {
  background: transparent;
  color: var(--signal);
  border-color: var(--signal);
}
.btn-signal:hover { background: var(--signal); color: var(--paper); opacity: 1 }

.btn-sm {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 0.38rem 0.75rem;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.btn-sm:hover { opacity: 0.82; text-decoration: none; color: var(--paper) }

/* ── Badge ──────────────────────────────────────────── */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.22em 0.55em;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--mid);
  margin-bottom: 0.875rem;
}

/* ── Notice / callout ───────────────────────────────── */
.notice {
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--signal);
  background: var(--paper-deep);
  border-radius: var(--radius);
  margin: 1.5rem 0;
  font-size: 0.9375rem;
}
.notice p { max-width: none; margin: 0 }
.notice-warn { border-left-color: var(--warn) }

/* ── Definition list ─────────────────────────────────── */
dl { margin: 0 0 1rem }
dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--mid);
  margin-top: 1.25rem;
  margin-bottom: 0.2rem;
}
dt:first-child { margin-top: 0 }
dd { margin: 0; max-width: var(--measure) }

/* ── Steps list ─────────────────────────────────────── */
.steps { list-style: none; padding: 0; margin: 0; counter-reset: s }
.steps li {
  counter-increment: s;
  padding: 1.25rem 0;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
}
.steps li:first-child { border-top: 0; padding-top: 0 }
.steps li::before {
  content: counter(s, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--signal);
  letter-spacing: 0.06em;
  padding-top: 0.35rem;
}
.steps p { margin: 0.25rem 0 0; color: var(--ink-soft); font-size: 0.9375rem }

/* ── Form components ────────────────────────────────── */
.form { max-width: 38rem }
.field { margin-bottom: 1.5rem }
label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 0.4rem;
}
.hint { font-size: 0.8125rem; color: var(--ink-soft); margin: 0.35rem 0 0; max-width: none }
.note { color: var(--warn); font-weight: 500 }
input[type="text"], input[type="email"], input[type="tel"],
input[type="url"], input[type="number"], select, textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.7rem 0.8rem;
  transition: border-color 0.15s;
  appearance: none;
}
input[type="text"]:focus, input[type="email"]:focus, input[type="tel"]:focus,
input[type="url"]:focus, input[type="number"]:focus, select:focus, textarea:focus {
  border-color: var(--signal);
  outline: none;
}
textarea { resize: vertical; min-height: 5rem }
input::placeholder, textarea::placeholder { color: var(--mid); opacity: 0.65 }

.consent { display: grid; grid-template-columns: 1.25rem 1fr; gap: 0.75rem; align-items: start }
.consent input[type="checkbox"] {
  width: 1.05rem; height: 1.05rem; margin-top: 0.28rem;
  accent-color: var(--signal); padding: 0; border: 0;
}
.consent label {
  font-family: var(--font-sans); font-size: 0.875rem;
  text-transform: none; letter-spacing: 0; color: var(--ink-soft); margin: 0;
}
.fallback { font-family: var(--font-mono); font-size: 0.8125rem; color: var(--ink-soft); margin-top: 1rem }

/* ── Tag input ──────────────────────────────────────── */
.tags-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  padding: 0.45rem 0.7rem;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: text;
  min-height: 2.8rem;
  transition: border-color 0.15s;
}
.tags-container:focus-within { border-color: var(--signal) }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.1rem 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink);
}
.tag-del {
  background: none; border: none; padding: 0 0 0 0.15rem;
  cursor: pointer; color: var(--mid); font-size: 1.05rem; line-height: 1;
}
.tag-del:hover { color: var(--warn) }
.tags-input {
  flex: 1; min-width: 6rem; border: none; background: transparent;
  font-family: var(--font-sans); font-size: 1rem; color: var(--ink); outline: none; padding: 0.15rem 0;
}
.tags-input:disabled { cursor: not-allowed; opacity: 0.4 }

/* ── Footer ─────────────────────────────────────────── */
footer { padding: 2.5rem 0 3.5rem }
.footer-inner {
  border-top: 1px solid var(--rule);
  padding-top: 2rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 44rem) { .footer-inner { grid-template-columns: 1fr } }
.footer-links { display: flex; gap: 1.25rem; flex-wrap: wrap; margin-bottom: 1rem }
.footer-links a {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em;
  color: var(--ink-soft); text-decoration: none;
}
.footer-links a:hover { color: var(--ink) }
footer p { font-size: 0.8125rem; color: var(--ink-soft); max-width: none; margin: 0 }
.footer-mark {
  text-align: right;
  font-family: var(--font-sans); font-size: 1.0625rem; font-weight: 700;
  color: var(--ink); letter-spacing: -0.01em; white-space: nowrap;
}
.footer-mark small {
  display: block; font-family: var(--font-mono); font-size: 0.625rem;
  font-weight: 400; letter-spacing: 0.1em; color: var(--mid); margin-top: 0.25rem;
}
@media (max-width: 44rem) { .footer-mark { text-align: left } }