/* ============================================================
   components.css — reusable UI components
   Nav, buttons, cards, cursor, layout shells.
   ============================================================ */

/* ---- Layout primitives ---------------------------------- */
.container {
  width: 100%;
  max-width: var(--w-container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: var(--section-y);
  scroll-margin-top: var(--nav-h);
}

.section--tight {
  padding-block: clamp(3rem, 2rem + 2.5vw, 4.5rem);
}

.section__head {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  margin-bottom: var(--sp-7);
  max-width: var(--w-container);
}

.section__head--split {
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--sp-6);
  flex-wrap: wrap;
}

.section__head-copy {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.hairline {
  height: 1px;
  background: var(--border);
  border: 0;
}

/* ---- Buttons -------------------------------------------- */
.btn {
  --btn-pad-y: 0.85em;
  --btn-pad-x: 1.5em;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  transition: transform var(--t-fast) var(--ease-out),
    background-color var(--t-med) var(--ease-out),
    color var(--t-med) var(--ease-out), border-color var(--t-med) var(--ease-out);
  will-change: transform;
}

.btn__icon {
  width: 1.05em;
  height: 1.05em;
  flex-shrink: 0;
  transition: transform var(--t-med) var(--ease-out);
}

.btn:hover .btn__icon {
  transform: translateX(3px);
}

.btn--primary {
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background: var(--accent-deep);
}

.btn--ghost {
  color: var(--text);
  border-color: var(--border-strong);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--text-dim);
  background: color-mix(in srgb, var(--text) 6%, transparent);
}

.btn--lg {
  --btn-pad-y: 1.05em;
  --btn-pad-x: 2em;
  font-size: var(--fs-body);
}

.btn--block {
  width: 100%;
}

/* Text link with animated underline */
.link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text);
  padding-bottom: 2px;
}

.link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-med) var(--ease-out);
}

.link:hover::after {
  transform: scaleX(1);
}

.link--accent {
  color: var(--accent-text);
}

.link__arrow {
  width: 0.95em;
  height: 0.95em;
  transition: transform var(--t-med) var(--ease-out);
}

.link:hover .link__arrow {
  transform: translate(3px, -3px);
}

/* ---- Navigation ----------------------------------------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background-color var(--t-med) var(--ease-out),
    border-color var(--t-med) var(--ease-out),
    backdrop-filter var(--t-med) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.nav.is-scrolled {
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  width: 100%;
}

/* Logo placeholder — swap text for an <img>/<svg> later without
   touching layout. Keep the .brand element as the anchor. */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--text-strong);
  white-space: nowrap;
}

.brand__mark {
  width: auto;
  height: 1.9rem;
  object-fit: contain;
  flex-shrink: 0;
}

.brand__name b {
  font-weight: 600;
  color: var(--text-strong);
}

.brand__name span {
  color: #ffffff;
  font-family: var(--font-ui);
  font-size: 0.7em;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  margin-left: 0.15em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 0.5rem + 1.4vw, 2.2rem);
}

.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: #ffffff;
  padding: 0.4em 0;
  transition: color var(--t-fast) var(--ease-out);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-med) var(--ease-out);
}

.nav__link:hover {
  color: var(--text);
}

.nav__link.is-active {
  color: var(--text);
}

.nav__link.is-active::after {
  transform: scaleX(1);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.nav__cta {
  white-space: nowrap;
}

/* ---- Burger / mobile menu ------------------------------- */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--r-sm);
}

.burger span {
  display: block;
  width: 20px;
  height: 1.5px;
  margin-inline: auto;
  background: var(--text);
  transition: transform var(--t-med) var(--ease-out),
    opacity var(--t-fast) var(--ease-out);
}

.burger.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.burger.is-open span:nth-child(2) {
  opacity: 0;
}

.burger.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--gutter);
  background: var(--bg);
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--t-med) var(--ease-out),
    visibility var(--t-med) var(--ease-out);
}

.menu.is-open {
  visibility: visible;
  opacity: 1;
}

/* Back-to-site bar, pinned to the top of the overlay */
.menu__bar {
  position: absolute;
  top: var(--gutter);
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
}

.menu__back {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: #ffffff;
  padding: 0.55em 1em 0.55em 0.7em;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  transition: color var(--t-fast) var(--ease-out),
    border-color var(--t-med) var(--ease-out),
    background-color var(--t-med) var(--ease-out);
}

.menu__back:hover {
  color: var(--text-strong);
  border-color: var(--text-dim);
  background: color-mix(in srgb, var(--text) 6%, transparent);
}

.menu__back-icon {
  width: 1.15em;
  height: 1.15em;
  flex-shrink: 0;
}

.menu__nav {
  display: flex;
  flex-direction: column;
  gap: 0.4em;
  margin-bottom: var(--sp-8);
}

.menu__link {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.2rem + 5vw, 3.5rem);
  color: var(--text-strong);
  letter-spacing: var(--tracking-tight);
}

.menu__foot {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
  color: #ffffff;
  font-size: var(--fs-sm);
}

/* ---- Custom cursor (desktop, fine-pointer only) --------- */
.cursor {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-cursor);
  width: 30px;
  height: 30px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  opacity: 0;
  mix-blend-mode: difference;
  transition: opacity 0.3s ease, width 0.25s var(--ease-out),
    height 0.25s var(--ease-out), background-color 0.25s var(--ease-out);
}

.cursor.is-active {
  opacity: 1;
}

.cursor.is-hover {
  width: 52px;
  height: 52px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
}

@media (hover: none), (pointer: coarse) {
  .cursor {
    display: none;
  }
}

/* ---- Chips / tags --------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
  color: #ffffff;
  padding: 0.4em 0.85em;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  white-space: nowrap;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}