/* ============================================================
   components.css — nav, footer, buttons, cards, chips, stepper,
   badges, hero, level switch, progress bar, toasts
   ============================================================ */

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }

.wordmark { display: inline-flex; align-items: baseline; gap: 2px; font-family: var(--font-head); font-weight: 700; letter-spacing: 0.04em; }
.wordmark__mark { color: var(--text); }
.wordmark__sub { color: var(--text-3); }
.wordmark:hover .wordmark__sub { color: var(--text); transition: color var(--t); }

.nav__menu { display: flex; align-items: center; gap: 8px; }
.nav__menu > a {
  font-size: var(--fs-sm); color: var(--text-2); padding: 8px 12px; border-radius: var(--radius-sm);
  position: relative; transition: color var(--t-fast);
}
.nav__menu > a:hover, .nav__menu > a.is-active { color: var(--text); }
.nav__menu > a.is-active::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 1px; background: var(--text);
}

.nav__toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav__toggle span { width: 22px; height: 2px; background: var(--text); transition: transform var(--t), opacity var(--t); }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Level switch ---------- */
.level-switch { display: inline-flex; gap: 2px; margin-left: 8px; padding: 3px; border: 1px solid var(--border); border-radius: var(--radius-pill); }
.level-switch button {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3); padding: 5px 10px; border-radius: var(--radius-pill); transition: color var(--t-fast), background var(--t-fast);
}
.level-switch button:hover { color: var(--text); }
.level-switch button[aria-pressed="true"] { background: var(--text); color: #000; }
.level-switch__dots { display: inline-flex; gap: 3px; align-items: center; }
.level-switch__dots i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: 0.28; transition: opacity var(--t-fast); }
.level-switch__dots i.on { opacity: 1; }
.level-switch button:hover .level-switch__dots i.on { opacity: 1; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  font-weight: 600; font-size: var(--fs-sm); padding: 12px 22px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-2); transition: transform var(--t), background var(--t), border-color var(--t), color var(--t);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--text); color: #000; border-color: var(--text); }
.btn--primary:hover { background: #e9e9e9; }
.btn--ghost { background: transparent; color: var(--text); }
.btn--ghost:hover { border-color: var(--border-3); background: var(--surface-2); }
.btn--sm { padding: 8px 14px; font-size: var(--fs-xs); }
.btn[disabled] { opacity: 0.4; cursor: not-allowed; transform: none; }

/* ---------- Cards ---------- */
.card {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px; transition: transform var(--t), border-color var(--t), background var(--t);
}
.card:hover { transform: translateY(-4px); border-color: var(--border-2); background: var(--surface-2); }
.card__num {
  font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-3);
  letter-spacing: 0.18em;
}
.card__title { font-size: var(--fs-h3); margin-top: 10px; }
.card__desc { color: var(--text-2); font-size: var(--fs-sm); margin-top: 8px; }

/* ---------- Chips / tags ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-2); border: 1px solid var(--border); border-radius: var(--radius-pill); padding: 4px 11px;
}
.chip--solid { background: var(--text); color: #000; border-color: var(--text); }
.chip--danger { color: var(--danger); border-color: rgba(255,82,87,0.4); }
.chip--safe { color: var(--safe); border-color: rgba(58,208,122,0.4); }

/* ---------- Stepper ---------- */
.stepper { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0 28px; }
.stepper__step {
  display: flex; align-items: center; gap: 10px; flex: 1 1 160px; min-width: 150px;
  border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px;
  color: var(--text-3); transition: border-color var(--t), color var(--t), background var(--t); text-align: left;
}
.stepper__step:hover { border-color: var(--border-2); color: var(--text-2); }
.stepper__step.is-active { border-color: var(--text); color: var(--text); background: var(--surface-2); }
.stepper__step.is-done { color: var(--text-2); }
.stepper__dot {
  width: 24px; height: 24px; flex: 0 0 auto; border-radius: 50%; border: 1px solid currentColor;
  display: grid; place-items: center; font-family: var(--font-mono); font-size: 11px;
}
.stepper__step.is-done .stepper__dot { background: var(--safe); color: #000; border-color: var(--safe); }
.stepper__label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; }

/* ---------- Progress bar ---------- */
.progress { height: 8px; border-radius: var(--radius-pill); background: var(--surface-2); border: 1px solid var(--border); overflow: hidden; }
.progress__fill { height: 100%; background: var(--text); width: 0; transition: width var(--t-slow); }

/* ---------- Badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--border-2); border-radius: var(--radius-pill);
  padding: 6px 14px; font-size: var(--fs-xs); font-family: var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase;
}
.badge svg { width: 14px; height: 14px; }
.badge--earned { background: var(--text); color: #000; border-color: var(--text); }
.badge--locked { color: var(--text-3); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding-block: 40px; margin-top: auto; }
.footer__inner { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; justify-content: space-between; }
.footer__wordmark { font-family: var(--font-head); font-weight: 700; letter-spacing: 0.04em; }
.footer__wordmark em { color: var(--text-3); font-style: normal; }
.footer__tag { color: var(--text-3); font-size: var(--fs-sm); margin-top: 4px; }
.footer__links { display: flex; align-items: center; gap: 16px; color: var(--text-2); }
.footer__links a { transition: color var(--t-fast), transform var(--t-fast); }
.footer__links a:hover { color: var(--text); transform: translateY(-2px); }
.footer__portfolio { font-size: var(--fs-sm); }
.footer__copy { color: var(--text-3); font-size: var(--fs-sm); width: 100%; order: 3; border-top: 1px solid var(--border); padding-top: 18px; }

/* ---------- Toasts ---------- */
.toast-host { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 300; display: flex; flex-direction: column; gap: 10px; align-items: center; pointer-events: none; }
.toast {
  background: var(--surface-3); border: 1px solid var(--border-2); border-radius: var(--radius); padding: 12px 18px;
  font-size: var(--fs-sm); display: flex; align-items: center; gap: 10px; box-shadow: var(--glow);
  animation: rise var(--t) both;
}
.toast--safe { border-color: rgba(58,208,122,0.5); }
.toast--danger { border-color: rgba(255,82,87,0.5); }

/* ---------- Mobile nav ---------- */
@media (max-width: 820px) {
  .nav__toggle { display: flex; }
  .nav__menu {
    position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: rgba(0,0,0,0.96); border-bottom: 1px solid var(--border); padding: 12px var(--gutter) 20px; gap: 4px;
    transform: translateY(-120%); transition: transform var(--t); max-height: calc(100vh - 64px); overflow:auto;
  }
  .nav__menu.is-open { transform: translateY(0); }
  .nav__menu > a { padding: 12px; }
  .level-switch { margin: 10px 0 0; justify-content: center; }
}