/* ==========================================================================
   Components - Design Skills 2030
   ========================================================================== */

/* -------------------------------------------------------------------------
   Navigation
   ------------------------------------------------------------------------- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: transparent;
  transition: background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border-subtle);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav__logo {
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: var(--ls-wide);
  color: var(--text-primary);
  text-transform: uppercase;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  position: relative;
  font-size: var(--fs-small);
  color: var(--text-tertiary);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-primary);
  transition: width var(--duration-normal) var(--ease-out);
}

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

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: var(--space-2);
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast);
}

.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);
}

/* -------------------------------------------------------------------------
   Cards
   ------------------------------------------------------------------------- */

.card {
  --card-padding: var(--space-6);
  --card-bg: var(--bg-secondary);
  --card-border: var(--border-subtle);

  position: relative;
  padding: var(--card-padding);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.card:hover {
  --card-border: var(--border-visible);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  font-size: 24px;
  color: var(--accent-primary);
  background: var(--accent-glow);
  border-radius: var(--radius-md);
  transition: transform var(--duration-normal) var(--ease-spring),
              background var(--duration-normal) var(--ease-out);
}

.card:hover .card__icon {
  transform: scale(1.1);
  background: rgba(129, 140, 248, 0.25);
}

.card__title {
  margin-bottom: var(--space-3);
  font-size: var(--fs-h3);
  color: var(--text-primary);
}

.card__description {
  font-size: var(--fs-small);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

/* -------------------------------------------------------------------------
   Accordion
   ------------------------------------------------------------------------- */

.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.accordion__item {
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--duration-normal) var(--ease-out);
}

.accordion__item:hover,
.accordion__item.open {
  border-color: var(--border-visible);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-8) var(--space-8);
  text-align: left;
  transition: background var(--duration-fast) var(--ease-out);
}

.accordion__trigger:hover {
  background: var(--bg-secondary);
}

.accordion__number {
  flex-shrink: 0;
  font-size: var(--fs-caption);
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: var(--ls-wide);
}

.accordion__icon {
  flex-shrink: 0;
  font-size: var(--fs-h3);
  color: var(--text-tertiary);
}

.accordion__title {
  flex-grow: 1;
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--text-primary);
}

.accordion__arrow {
  flex-shrink: 0;
  font-size: 20px;
  color: var(--text-tertiary);
  transition: transform var(--duration-normal) var(--ease-out);
}

.accordion__item.open .accordion__arrow {
  transform: rotate(180deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out);
}

.accordion__inner {
  padding: var(--space-4) var(--space-8) var(--space-10);
  padding-left: calc(var(--space-8) + var(--fs-h3) + var(--space-4));
}

.accordion__text {
  margin-bottom: var(--space-8);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

.accordion__items {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.accordion__sub-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: transparent;
  border-radius: var(--radius-md);
}

.accordion__sub-item strong {
  color: var(--text-primary);
}

/* -------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-visible);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.btn--icon {
  width: 48px;
  height: 48px;
  padding: 0;
  font-size: 20px;
}

/* -------------------------------------------------------------------------
   Section Headers
   ------------------------------------------------------------------------- */

.section-header {
  margin-bottom: var(--space-12);
}

.section-header__label {
  display: inline-block;
  margin-bottom: var(--space-4);
  font-size: var(--fs-caption);
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

.section-header__title {
  font-size: var(--fs-h1);
  color: var(--text-primary);
}

/* -------------------------------------------------------------------------
   Grid Layouts
   ------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--cards {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.grid--3col {
  grid-template-columns: repeat(3, 1fr);
}

.grid--2col {
  grid-template-columns: repeat(2, 1fr);
}

/* -------------------------------------------------------------------------
   Skill Badge
   ------------------------------------------------------------------------- */

.skill-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--fs-caption);
  color: var(--accent-primary);
  background: var(--accent-glow);
  border-radius: var(--radius-full);
}

/* -------------------------------------------------------------------------
   Divider
   ------------------------------------------------------------------------- */

.divider {
  width: 100%;
  height: 1px;
  background: var(--border-subtle);
  margin-block: var(--space-8);
}