/* ==========================================================================
   Components – dùng chung cho mọi trang
   Quy ước tên: .c-<component>, .c-<component>__<element>, .c-<component>--<modifier>
   Trạng thái: .is-active / [aria-pressed="true"] / [aria-selected="true"]
   ========================================================================== */

/* ---------- Button ---------- */
.c-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: var(--size-touch); padding: 0 var(--space-5);
  border: 1.5px solid transparent; border-radius: var(--radius-md);
  font-weight: 700; font-size: var(--fs-base); line-height: 1.2; text-align: center;
  text-decoration: none; white-space: nowrap;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.c-btn--primary { background: var(--color-accent); color: var(--color-on-accent); }
.c-btn--primary:hover { background: var(--color-accent-hover); color: var(--color-on-accent); }
.c-btn--secondary { border-color: var(--color-border-strong); color: var(--color-text); background: transparent; }
.c-btn--secondary:hover { border-color: var(--color-accent); color: var(--color-text); }
.c-btn--outline-accent { border-color: var(--color-accent); color: var(--color-accent); border-radius: var(--radius-pill); }
.c-btn--outline-accent:hover { background: var(--color-surface-active); color: var(--color-accent); }
.c-btn--ghost { color: var(--color-text); background: transparent; font-weight: 600; padding-inline: var(--space-3); }
.c-btn--lg { min-height: 52px; font-size: var(--fs-md); }
.c-btn--block { display: flex; width: 100%; }
.c-btn--icon { width: var(--size-touch); padding: 0; border-radius: var(--radius-pill); }

/* ---------- Header ---------- */
.c-header {
  position: sticky; top: 0; z-index: var(--z-header);
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  padding-top: env(safe-area-inset-top, 0px);
}
.c-header__inner { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); }
.c-brand { display: flex; align-items: center; gap: var(--space-3); color: var(--color-text); text-decoration: none; }
.c-brand:hover { color: var(--color-text); }
.c-brand__mark { width: 34px; height: 34px; flex-shrink: 0; }
.c-brand__name { display: block; font-weight: 800; font-size: var(--fs-base); line-height: 1.15; }
.c-brand__tagline { display: block; font-size: var(--fs-xs); color: var(--color-text-muted); line-height: 1.2; }

.c-nav__list { display: flex; gap: var(--space-7); }
.c-nav__link { color: var(--color-text); text-decoration: none; font-weight: 500; font-size: 15px; padding: var(--space-2) 0; }
.c-nav__link:hover, .c-nav__link[aria-current="page"] { color: var(--color-accent); }
.c-header__actions { display: flex; align-items: center; gap: var(--space-2); }
.c-header__menu { display: none; background: transparent; border: 0; }

@media (max-width: 1023.98px) {
  .c-header__menu { display: inline-flex; }
  .c-header__actions { display: none; }
  .c-nav {
    position: fixed; inset: calc(var(--header-h) + env(safe-area-inset-top, 0px)) 0 auto 0;
    background: var(--color-bg); border-bottom: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-4) var(--space-4);
    display: none;
  }
  .c-nav.is-open { display: block; }
  .c-nav__list { flex-direction: column; gap: 0; }
  .c-nav__link { display: flex; align-items: center; min-height: var(--size-touch); border-bottom: 1px solid var(--color-border); }
  .c-nav__extra { display: grid; gap: var(--space-2); margin-top: var(--space-4); }
}
@media (min-width: 1024px) { .c-nav__extra { display: none; } }

/* ---------- Axis badge (số trục, màu theo trục) ---------- */
.c-axis-badge {
  --_size: 28px;
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
  width: var(--_size); height: var(--_size); border-radius: var(--radius-pill);
  background: var(--axis-color, var(--color-border-strong)); color: #fff;
  font-family: var(--font-mono); font-weight: 600; font-size: var(--fs-sm); line-height: 1;
}
.c-axis-badge--lg { --_size: 30px; }
[data-axis="1"] { --axis-color: var(--axis-1); }
[data-axis="2"] { --axis-color: var(--axis-2); }
[data-axis="3"] { --axis-color: var(--axis-3); }
[data-axis="4"] { --axis-color: var(--axis-4); }
[data-axis="5"] { --axis-color: var(--axis-5); }
[data-axis="6"] { --axis-color: var(--axis-6); }

/* ---------- Chip toggle ---------- */
.c-chip {
  display: inline-flex; align-items: center; gap: var(--space-2);
  min-height: var(--size-touch); padding: 0 var(--space-4);
  border: 1.5px solid var(--color-border-strong); border-radius: var(--radius-pill);
  background: transparent; color: var(--color-text);
  font-size: var(--fs-sm); font-weight: 600; line-height: 1.2; text-align: left;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.c-chip:hover { border-color: var(--color-accent); }
.c-chip[aria-pressed="true"] { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-on-accent); }
.c-chip__check { width: 16px; height: 16px; display: none; }
.c-chip[aria-pressed="true"] .c-chip__check { display: block; }
.c-chip-group { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ---------- Card / panel ---------- */
.c-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-5);
}
.c-card__title { font-size: var(--fs-lg); font-weight: 700; line-height: 1.3; }

/* ---------- Progress (bộ đếm) ---------- */
.c-progress { height: 8px; border-radius: var(--radius-pill); background: var(--color-border); overflow: hidden; }
.c-progress__bar {
  height: 100%; width: var(--value, 100%); min-width: 4px;
  background: var(--color-accent); border-radius: inherit;
  transition: width 320ms var(--ease);
}

/* ---------- Section heading ---------- */
.c-eyebrow { font-family: var(--font-mono); font-size: var(--fs-xs); font-weight: 600; letter-spacing: .06em; color: var(--color-accent); }
.c-section-title { font-size: clamp(1.5rem, 1.1rem + 1.2vw, 2rem); font-weight: 800; line-height: 1.2; letter-spacing: -.01em; }

/* ---------- Footer ---------- */
.c-footer { border-top: 1px solid var(--color-border); padding-bottom: env(safe-area-inset-bottom, 0px); }
.c-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-5); padding-block: var(--space-7); font-size: var(--fs-sm); color: var(--color-text-muted); }
.c-footer__links { display: flex; flex-wrap: wrap; gap: var(--space-5); }

/* ---------- Dialog (phóng to ảnh) ---------- */
.c-dialog { padding: 0; border: 0; background: var(--color-bg); color: var(--color-text); max-width: 100vw; max-height: 100dvh; width: 100vw; height: 100dvh; }
.c-dialog::backdrop { background: rgba(0,0,0,.7); }
.c-dialog__bar { position: sticky; top: 0; display: flex; justify-content: space-between; align-items: center; padding: calc(env(safe-area-inset-top, 0px) + 8px) var(--space-4) 8px; background: var(--color-bg); border-bottom: 1px solid var(--color-border); }
.c-dialog__body { overflow: auto; height: calc(100% - 60px); touch-action: pan-x pan-y pinch-zoom; }
.c-dialog__body img { max-width: none; width: 1536px; height: auto; }

/* ---------- Radar (svg sinh bởi radar.js) ---------- */
.c-radar { width: 100%; height: auto; overflow: visible; }
[data-radar] { width: 100%; }