/* ============================================================
   components.css — reusable UI: nav, buttons, cards, badges,
   bars, timeline, forms, back-to-top, progress bar
   ============================================================ */

/* ---------- Scroll progress bar ---------- */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 120;
  background: transparent;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gradient);
  box-shadow: 0 0 12px rgba(109, 141, 255, 0.6);
}

/* ---------- Navigation ---------- */
.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  transition:
    background var(--speed) var(--ease),
    box-shadow var(--speed) var(--ease);
}

/* Glass background kicks in once the page is scrolled */
.site-nav.is-scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
}

/* The constellation mark (same motif as the favicon) */
.nav-logo-glyph {
  flex-shrink: 0;
  transition: transform 0.45s var(--ease);
}

.nav-logo:hover .nav-logo-glyph {
  transform: rotate(-14deg) scale(1.08);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
}

.nav-link {
  position: relative;
  font-size: 0.95rem;
  color: var(--text-muted);
  padding: 0.35rem 0;
  transition: color var(--speed) var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--speed) var(--ease);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--text);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
}

/* Hamburger (mobile only, see media query in sections.css) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  z-index: 110;
}

.nav-toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--speed) var(--ease), opacity var(--speed) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  border: 1px solid transparent;
  transition:
    transform var(--speed) var(--ease),
    box-shadow var(--speed) var(--ease),
    background var(--speed) var(--ease),
    border-color var(--speed) var(--ease),
    color var(--speed) var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--gradient);
  color: #0b1020;
}

.btn-primary:hover {
  box-shadow: var(--glow);
}

.btn-outline {
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 24px rgba(109, 141, 255, 0.15);
}

.btn-ghost {
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--accent);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* ---------- Glass card base ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* Generic hoverable card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition:
    transform var(--speed) var(--ease),
    border-color var(--speed) var(--ease),
    box-shadow var(--speed) var(--ease),
    background var(--speed) var(--ease);
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--border-strong);
  background: var(--surface-strong);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

/* ---------- Cursor spotlight ----------
   A soft highlight that follows the pointer over any .card.
   --mx/--my are set per-card by js/modules/spotlight.js; the
   body gets .spotlight-on only on fine-pointer, motion-OK setups. */
.spotlight-on .card {
  position: relative;
}

.spotlight-on .card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  background: radial-gradient(
    240px circle at var(--mx, 50%) var(--my, 50%),
    rgba(109, 141, 255, 0.13),
    transparent 65%
  );
}

.spotlight-on .card:hover::after {
  opacity: 1;
}

/* ---------- Project filter chips ---------- */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.2rem;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  transition:
    color var(--speed) var(--ease),
    border-color var(--speed) var(--ease),
    background var(--speed) var(--ease),
    box-shadow var(--speed) var(--ease);
}

.filter-chip:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.filter-chip.is-active {
  color: #0b1020;
  font-weight: 600;
  background: var(--gradient);
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(109, 141, 255, 0.35);
}

.filter-count {
  font-size: 0.7rem;
  line-height: 1.4;
  padding: 0 0.4rem;
  border-radius: 999px;
  background: rgba(148, 163, 216, 0.15);
}

.filter-chip.is-active .filter-count {
  background: rgba(11, 16, 32, 0.22);
}

/* ---------- Tags & badges ---------- */
.tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: rgba(109, 141, 255, 0.1);
  border: 1px solid rgba(109, 141, 255, 0.25);
}

.tag-purple {
  color: var(--accent-2);
  background: rgba(160, 107, 255, 0.1);
  border-color: rgba(160, 107, 255, 0.25);
}

/* Skill badge tile. Holds a brand logo (see brandicons.js), a
   stroke glyph for concept skills, or a two-letter abbreviation. */
.skill-badge {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: #eef1ff;
  background: linear-gradient(135deg, rgba(109, 141, 255, 0.28), rgba(160, 107, 255, 0.28));
  border: 1px solid var(--border);
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

/* Neutral dark tile so brand colors read true */
.skill-badge--icon {
  background: rgba(148, 163, 216, 0.09);
}

/* Concept skills (SQL, CV, RAG…) use tinted stroke glyphs */
.skill-badge--glyph {
  color: var(--accent);
}

/* ---------- Skill proficiency bar ----------
   Width is driven by --level; animated in when scrolled into view. */
.skill-bar {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: rgba(148, 163, 216, 0.12);
  overflow: hidden;
}

.skill-bar-fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: var(--gradient);
  transition: width 1.1s var(--ease);
}

.is-visible .skill-bar-fill {
  width: var(--level, 50%);
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

/* The vertical spine */
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
  opacity: 0.5;
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* The dot on the spine */
.timeline-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(109, 141, 255, 0.15);
}

/* ---------- Contact form ---------- */
.contact-form {
  padding: 1.75rem;
  display: grid;
  gap: 1.1rem;
}

.form-field {
  display: grid;
  gap: 0.4rem;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  color: var(--text);
  background: rgba(5, 7, 15, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
  resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--text-faint);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(109, 141, 255, 0.18);
}

.form-status {
  min-height: 1.2em;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.form-status.is-ok {
  color: var(--ok);
}

.form-status.is-err {
  color: var(--err);
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 1.4rem;
  bottom: 1.4rem;
  z-index: 90;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--text);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition:
    opacity var(--speed) var(--ease),
    transform var(--speed) var(--ease),
    border-color var(--speed) var(--ease);
}

.back-to-top.is-shown {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
}