/* Reusable components: buttons, cards, links, badges, alerts, forms, brand, header, footer, hero, CTA band */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { box-shadow: var(--focus-ring); outline-offset: 2px; }

.btn--primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--primary:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }

.btn--accent { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.btn--accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-contrast); }

.btn--secondary { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn--secondary:hover { background: var(--ink); color: var(--paper); }

.btn--ghost { background: transparent; color: var(--accent); text-decoration: underline; text-underline-offset: 3px; padding-inline: 8px; }
.btn--ghost:hover { color: var(--accent-hover); }

.btn[disabled], .btn.is-disabled { background: var(--disabled-bg); color: var(--disabled-text); border-color: transparent; cursor: not-allowed; }

.btn--sm { padding: 9px 16px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; }
.btn--lg { padding: 15px 28px; font-size: 17px; }

/* ---------- Links ---------- */
.link-more {
  display: inline-block;
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- Cards ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.card__icon {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  margin-bottom: 4px;
  border-radius: var(--radius);
  background: var(--green-soft);
  color: var(--green);
}
.card__title { font-size: 22px; }
.card__text { color: var(--text-secondary); }
.card .link-more { margin-top: 8px; }

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
}
.badge--green { border-color: var(--green); color: var(--green); }
.badge--accent { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }

/* ---------- Alerts ---------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  margin-top: 20px;
  border: 1px solid;
  border-radius: var(--radius);
}
.alert__icon { flex: none; line-height: 1.55; }
.alert--success { border-color: var(--green); background: var(--green-soft); }
.alert--success .alert__icon { color: var(--green); }
.alert--error { border-color: var(--warn); background: var(--warn-soft); }
.alert--error .alert__icon { color: var(--warn); }
.alert--info { border-color: var(--accent); background: var(--accent-soft); }
.alert--info .alert__icon { color: var(--accent); }

/* ---------- Forms ---------- */
.field { margin-bottom: 20px; }
.field .label { display: block; margin-bottom: 8px; color: var(--text-secondary); font-size: 12px; }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 13px 16px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-muted); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}
.field textarea { resize: vertical; min-height: 140px; }
.field select {
  appearance: none;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237a7873' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}
.field.is-invalid input, .field.is-invalid textarea { border-color: var(--warn); }
.field__error { margin-top: 8px; font-size: 12px; color: var(--warn); }
.form__actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; margin-top: 8px; }
.form__note { font-size: 14px; }

/* ---------- Brand ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}
.brand:hover { color: inherit; }
.brand__mark { width: 44px; height: auto; flex: none; }
.wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
  text-transform: uppercase;
  white-space: nowrap;
}
.wordmark__panda { font-size: 18px; font-weight: 400; letter-spacing: 0.08em; }
.wordmark__tech { font-size: 10px; letter-spacing: 0.34em; margin-top: 3px; color: var(--green); font-family: var(--font-mono); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-h);
}
.site-nav { display: flex; align-items: center; gap: 32px; }
.site-nav__list { display: flex; gap: 28px; list-style: none; }
.site-nav__list a {
  display: inline-block;
  padding: 6px 0;
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.site-nav__list a:hover { color: var(--ink); }
.site-nav__list a.is-active { color: var(--ink); border-bottom-color: var(--accent); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.nav-toggle__icon { display: inline-flex; flex-direction: column; gap: 4px; width: 18px; }
.nav-toggle__icon span { display: block; height: 2px; background: currentColor; border-radius: 1px; transition: transform 0.2s, opacity 0.2s; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0; right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 12px var(--gutter) 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.25);
  }
  .site-header.is-open .site-nav { display: flex; }
  .site-nav__list { flex-direction: column; gap: 0; }
  .site-nav__list a { display: block; padding: 12px 0; border-bottom: 1px solid var(--border); }
  .site-nav__list a.is-active { border-bottom-color: var(--accent); }
  .site-nav .lang-switch { padding: 12px 0 4px; }
  .site-nav__cta { margin-top: 8px; justify-content: center; }
}

/* ---------- Hero ---------- */
.hero { border-bottom: 1px solid var(--border); overflow: hidden; }
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 48px;
  align-items: center;
  min-height: min(640px, 82vh);
  padding-block: clamp(56px, 8vw, 96px);
}
.hero__copy .label { margin-bottom: 24px; }
.hero__title {
  font-size: clamp(40px, 6.4vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin-bottom: 24px;
}
.hero__lede { font-size: clamp(17px, 1.6vw, 20px); color: var(--text-secondary); max-width: 46ch; margin-bottom: 36px; }
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__actions--center { justify-content: center; margin-top: 32px; }

.hero__art { position: relative; height: 100%; min-height: 360px; }

/* Transparent panel around the panda mark (no fill, no visible border) */
.hero__panel {
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  width: min(72%, 380px);
  aspect-ratio: 1 / 1;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-card);
  display: grid;
  place-items: center;
  z-index: 1;
}
.hero__mark { width: 62%; opacity: 0.95; }

/* bamboo bars: brand decoration, always green, never interactive. Stacked above the panel. */
.bamboo {
  position: absolute;
  z-index: 2;
  left: 0; top: 0; bottom: 0;
  display: flex;
  align-items: stretch;
  gap: 10px;
  padding-block: 8px;
}
.bamboo i {
  display: block;
  width: 14px;
  border-radius: 7px;
  background: linear-gradient(to bottom,
    rgba(52, 120, 93, 0.45) 0 34%, transparent 34% 37%,
    rgba(52, 120, 93, 0.45) 37% 66%, transparent 66% 69%,
    rgba(52, 120, 93, 0.45) 69% 100%);
  opacity: 0.55;
}
.bamboo i:nth-child(2) { margin-top: 48px; margin-bottom: 24px; }
.bamboo i:nth-child(3) { margin-top: 16px; margin-bottom: 72px; opacity: 0.4; }
.bamboo i:nth-child(4) { margin-top: 80px; opacity: 0.35; }
.bamboo i:nth-child(5) { margin-bottom: 40px; opacity: 0.3; }
.bamboo i:nth-child(6) { margin-top: 32px; margin-bottom: 96px; opacity: 0.25; }
.bamboo i:nth-child(n+7) { display: none; }

@media (max-width: 860px) {
  .hero__inner { grid-template-columns: 1fr; min-height: 0; gap: 40px; }
  .hero__art { min-height: 220px; order: -1; }
  .hero__panel { width: 200px; right: 0; }
  .bamboo { gap: 8px; }
  .bamboo i { width: 10px; }
}

/* ---------- CTA band ---------- */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding: clamp(32px, 5vw, 56px) clamp(24px, 5vw, 48px);
  border-radius: var(--radius-band);
}
.cta-band__title { margin-bottom: 8px; }
.cta-band__text { color: var(--text-secondary); max-width: 48ch; }

/* ---------- Language switcher ---------- */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  font-size: 11px;
  letter-spacing: 0.12em;
}
.lang-switch li + li::before { content: "/"; color: var(--text-muted); margin-inline: 6px; }
.lang-switch a { color: var(--text-secondary); text-decoration: none; padding: 4px 2px; border-bottom: 2px solid transparent; }
.lang-switch a:hover { color: var(--ink); }
.lang-switch a.is-active { color: var(--ink); border-bottom-color: var(--green); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding-block: 48px 32px; margin-top: auto; }
.site-footer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.site-footer__copy { font-size: 12px; color: var(--text-muted); }
.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  padding-block: 36px;
}
.site-footer__cols .label { margin-bottom: 14px; }
.site-footer__links { list-style: none; display: grid; gap: 10px; }
.site-footer__links a { color: var(--text-secondary); text-decoration: none; }
.site-footer__links a:hover { color: var(--ink); }
.site-footer__text { color: var(--text-secondary); }
.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.site-footer__descriptor { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--green); }
.site-footer__tools { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.theme-toggle {
  padding: 7px 12px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink); }

@media (max-width: 640px) {
  .site-footer__cols { grid-template-columns: 1fr; gap: 28px; }
}