/* Sketchbook theme — warm paper, ink strokes, hand-drawn accents.
   Mirrors the app palette (lib/theme/app_colors.dart). */

@import url("https://fonts.googleapis.com/css2?family=Gochi+Hand&family=Gaegu:wght@400;700&display=swap");

:root {
  color-scheme: light;
  --paper: #f5f1e8;
  --surface: #fffdf4;
  --text: #2b2b2b;
  --ink-deep: #232220;
  --muted: #5c564c;
  --accent: #3f4c7a; /* faded indigo ink */
  --ochre: #9a6f27;
  --ink-border: rgba(58, 54, 46, 0.4);
  --ink-border-soft: rgba(58, 54, 46, 0.25);
  --max-width: 760px;
  --hand-font: "Gochi Hand", "Gaegu", cursive;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--paper);
  /* Subtle paper grain: faint ruled texture + vignette washes. */
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(255, 253, 244, 0.9) 0%, transparent 55%),
    radial-gradient(ellipse at 90% 100%, rgba(154, 111, 39, 0.06) 0%, transparent 50%),
    repeating-linear-gradient(
      0deg,
      transparent 0px,
      transparent 3px,
      rgba(58, 54, 46, 0.012) 3px,
      rgba(58, 54, 46, 0.012) 4px
    );
}

header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1rem;
}

header h1 {
  margin: 0 0 0.35rem;
  font-family: var(--hand-font);
  font-size: 2.4rem;
  font-weight: 400;
  color: var(--ink-deep);
  letter-spacing: 0.02em;
}

header p {
  margin: 0;
  color: var(--muted);
  font-family: var(--hand-font);
  font-size: 1.15rem;
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
}

nav .nav-links a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 1rem;
  font-weight: 600;
  border-bottom: 1.5px dashed var(--ink-border-soft);
  padding-bottom: 1px;
}

nav .nav-links a:hover {
  color: var(--ink-deep);
  border-bottom-color: var(--ink-border);
}

body > .lang-switch {
  display: flex;
  max-width: var(--max-width);
  margin: 1.25rem auto 0;
  padding: 0;
  justify-content: flex-end;
  width: fit-content;
  border: 1.5px solid var(--ink-border);
  /* Uneven radii for a hand-drawn outline. */
  border-radius: 12px 9px 13px 8px / 9px 13px 8px 12px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: 2px 3px 0 rgba(58, 54, 46, 0.08);
}

.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
}

.lang-switch button.active {
  background: var(--ink-deep);
  color: var(--surface);
}

.lang-switch button:hover:not(.active) {
  background: rgba(58, 54, 46, 0.06);
}

[data-lang-block][hidden] {
  display: none !important;
}

main {
  max-width: var(--max-width);
  margin: 0 auto 3rem;
  padding: 1.75rem 1.5rem 2.25rem;
  background: var(--surface);
  border: 1.5px solid var(--ink-border);
  border-radius: 16px 11px 18px 10px / 11px 17px 10px 16px;
  box-shadow: 3px 4px 0 rgba(58, 54, 46, 0.08);
}

main h2 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  font-family: var(--hand-font);
  font-size: 1.45rem;
  font-weight: 400;
  color: var(--ink-deep);
}

main h2:first-child {
  margin-top: 0;
}

main h3 {
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  font-size: 1rem;
  color: var(--ink-deep);
}

main p,
main li {
  color: var(--text);
}

main ul,
main ol {
  padding-left: 1.25rem;
}

main a {
  color: var(--accent);
}

code {
  background: rgba(58, 54, 46, 0.07);
  border: 1px solid var(--ink-border-soft);
  border-radius: 6px 4px 7px 4px / 4px 6px 4px 7px;
  padding: 0.05rem 0.35rem;
  font-size: 0.9em;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
}

.hero-card {
  background: var(--surface);
  border: 1.5px solid var(--ink-border);
  border-radius: 18px 12px 16px 11px / 12px 17px 11px 18px;
  padding: 1.75rem 1.5rem;
  box-shadow: 3px 4px 0 rgba(58, 54, 46, 0.08);
}

.hero-card h2 {
  margin-top: 1.75rem;
  margin-bottom: 0.6rem;
  font-family: var(--hand-font);
  font-size: 1.45rem;
  font-weight: 400;
  color: var(--ink-deep);
}

.hero-card h2:first-child {
  margin-top: 0;
}

.hero-card strong {
  color: var(--accent);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.cta-row a {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border: 1.5px solid var(--ink-deep);
  border-radius: 12px 8px 13px 9px / 9px 12px 8px 13px;
  background: var(--ink-deep);
  color: var(--surface);
  text-decoration: none;
  font-weight: 600;
  box-shadow: 2px 3px 0 rgba(58, 54, 46, 0.15);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}

.cta-row a:hover {
  transform: translate(1px, 1px);
  box-shadow: 1px 2px 0 rgba(58, 54, 46, 0.15);
}

.cta-row a.secondary {
  background: var(--surface);
  color: var(--ink-deep);
  border: 1.5px solid var(--ink-border);
  box-shadow: 2px 3px 0 rgba(58, 54, 46, 0.08);
}

footer {
  max-width: var(--max-width);
  margin: 0 auto 2rem;
  padding: 0 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

footer a {
  color: var(--accent);
}