/* ==========================================================================
   Koorosh Afshoon — Portfolio
   Core stylesheet: tokens, layout, components
   ========================================================================== */

:root {
  /* Color tokens */
  --bg: #090c14;
  --bg-elevated: #0d111c;
  --surface: #121828;
  --surface-2: #171f34;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  --text: #eaeef7;
  --text-muted: #8b93ab;
  --text-faint: #5c6580;

  --blue: #5b8cff;
  --purple: #9b6bff;
  --cyan: #2fe0d4;

  --gradient-primary: linear-gradient(135deg, var(--blue) 0%, var(--purple) 100%);
  --gradient-glow: linear-gradient(135deg, rgba(91, 140, 255, 0.35), rgba(155, 107, 255, 0.35));
  --gradient-text: linear-gradient(120deg, var(--blue), var(--cyan) 50%, var(--purple));

  /* Typography */
  --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;

  /* Layout */
  --container-width: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --header-height: 76px;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease);
  --transition-med: 0.4s var(--ease);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, p {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

code {
  font-family: var(--font-mono);
}

.container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ---------- Global helpers ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.text-gradient {
  background: var(--gradient-text);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradient-shift 6s ease infinite;
}

.glass-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  position: relative;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.badge--private {
  color: var(--purple);
  border-color: rgba(155, 107, 255, 0.35);
  background: rgba(155, 107, 255, 0.08);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
}

.tag-list li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot--red { background: #ff5f56; }
.dot--yellow { background: #ffbd2e; }
.dot--green { background: #27c93f; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  position: relative;
}

.btn--primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 8px 30px -8px rgba(91, 140, 255, 0.55);
}

.btn--primary:hover {
  box-shadow: 0 10px 40px -6px rgba(155, 107, 255, 0.7);
  transform: translateY(-2px);
}

.btn--ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.btn--small {
  padding: 9px 18px;
  font-size: 0.8rem;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-height);
  z-index: 100;
  transition: background var(--transition-med), border-color var(--transition-med), backdrop-filter var(--transition-med);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(9, 12, 20, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

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

.nav__logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.nav__logo-bracket {
  color: var(--cyan);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav__link {
  font-size: 0.92rem;
  color: var(--text-muted);
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 1.5px;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}

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

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

.nav__link--cta {
  padding: 9px 20px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text);
}

.nav__link--cta::after {
  display: none;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav__toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* ---------- Cursor & Progress ---------- */
.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 140, 255, 0.12) 0%, rgba(155, 107, 255, 0.06) 45%, transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 1;
  will-change: transform;
}

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--gradient-primary);
  z-index: 200;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero__grid {
  position: absolute;
  inset: -10% -10%;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 40%, black 10%, transparent 75%);
}

.hero__glow {
  position: absolute;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.35;
}

.hero__glow--1 {
  background: var(--blue);
  top: -180px;
  left: -140px;
}

.hero__glow--2 {
  background: var(--purple);
  bottom: -220px;
  right: -160px;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin-bottom: 22px;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--text);
  margin-bottom: 18px;
  min-height: 1.6em;
}

.typing {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-weight: 600;
}

.typing-cursor {
  color: var(--cyan);
  animation: blink 1s step-end infinite;
}

.hero__desc {
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 34px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: 44px;
}

.hero__stat {
  font-family: var(--font-mono);
}

.hero__stat p {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 4px;
}

.counter, .hero__stat-suffix {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
}

.counter--lg {
  font-size: 3rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* pipeline visual */
.hero__visual {
  display: flex;
  justify-content: center;
}

.pipeline-card {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.6);
}

.pipeline-card canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.pipeline-card__label {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 40px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  background: rgba(9, 12, 20, 0.55);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}

.pipeline-card__title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 1.5px solid var(--border-strong);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-hint span {
  width: 4px;
  height: 8px;
  border-radius: 4px;
  background: var(--cyan);
  animation: scroll-hint-move 1.6s ease infinite;
}

/* ---------- Sections ---------- */
.section {
  padding: 120px 0;
  position: relative;
}

.section--alt {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section__head {
  max-width: 680px;
  margin-bottom: 60px;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.section__lead {
  color: var(--text-muted);
  margin-top: 14px;
  font-size: 1.05rem;
}

/* ---------- About ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: start;
}

.about__text p {
  color: var(--text-muted);
  margin-bottom: 18px;
}

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

.about__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.about__terminal {
  padding: 0;
  overflow: hidden;
}

.code-block {
  margin: 0;
  padding: 22px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
  color: var(--text-muted);
}

.tok-key { color: var(--cyan); }
.tok-str { color: #a5e3ff; }
.tok-num { color: var(--purple); }
.tok-punc { color: var(--text-faint); }

/* ---------- Experience ---------- */
.experience__list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding-left: 34px;
  border-left: 1px solid var(--border);
}

.experience__item {
  position: relative;
}

.experience__marker {
  position: absolute;
  left: -41px;
  top: 30px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
}

.experience__marker span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.experience__body {
  padding: 30px;
}

.experience__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.experience__top h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

.experience__date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
}

.experience__body p {
  color: var(--text-muted);
}

.experience__body code {
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--cyan);
}

.experience__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

/* ---------- Project cards ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.project-card {
  overflow: hidden;
  transition: transform var(--transition-med), border-color var(--transition-med);
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
}

.project-card__image {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  color: rgba(234, 238, 247, 0.85);
}

.project-card__image::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.9;
}

.project-card__image--vakilino::before { background: linear-gradient(135deg, #1c2a52, #3a2a6b); }
.project-card__image--proxybridge::before { background: linear-gradient(135deg, #123048, #1d4d63); }
.project-card__image--proxyscout::before { background: linear-gradient(135deg, #2a1c46, #4a2a5c); }
.project-card__image--topolter::before { background: linear-gradient(135deg, #17324a, #1f4d3f); }

.project-card__glyph {
  width: 56px;
  height: 56px;
  position: relative;
  z-index: 1;
}

.project-card__body {
  padding: 26px;
}

.project-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.project-card__top h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.project-card__desc {
  color: var(--text-muted);
}

.project-card__details {
  margin-top: 12px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.project-card__details summary {
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--cyan);
  font-family: var(--font-mono);
}

.project-card__details ul {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.project-card__details li {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-left: 16px;
  position: relative;
}

.project-card__details li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--purple);
}

.project-card__details code {
  color: var(--cyan);
}

/* ---------- Production sites ---------- */
.site-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.site-card {
  overflow: hidden;
  display: block;
  transition: transform var(--transition-med), border-color var(--transition-med);
}

.site-card:hover {
  transform: translateY(-6px);
  border-color: var(--cyan);
}

.site-card__browser {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}

.site-card__url {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  margin-left: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-card__preview {
  height: 140px;
  position: relative;
  overflow: hidden;
}

.site-card__preview::before,
.site-card__preview::after {
  content: "";
  position: absolute;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
}

.site-card__preview::before {
  top: 18px;
  left: 18px;
  right: 18px;
  height: 12px;
}

.site-card__preview::after {
  top: 44px;
  left: 18px;
  width: 60%;
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.site-card__preview--1 { background: linear-gradient(160deg, #12213f, #0b0f19); }
.site-card__preview--2 { background: linear-gradient(160deg, #22183f, #0b0f19); }
.site-card__preview--3 { background: linear-gradient(160deg, #123527, #0b0f19); }

.site-card__footer {
  padding: 20px;
}

.site-card__footer h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.site-card__footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ---------- GitHub repo cards ---------- */
.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 32px;
}

.filter-btn {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.filter-btn.is-active,
.filter-btn:hover {
  color: var(--text);
  border-color: var(--cyan);
  background: rgba(47, 224, 212, 0.08);
}

.repo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.repo-card {
  padding: 26px;
  transition: transform var(--transition-med), opacity var(--transition-med);
}

.repo-card:hover {
  transform: translateY(-4px);
}

.repo-card.is-hidden {
  display: none;
}

.repo-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.repo-card__head h3 {
  font-size: 1.05rem;
}

.repo-card__icon {
  color: var(--text-muted);
}

.repo-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.repo-card__links {
  margin-top: 16px;
}

.github-cta {
  text-align: center;
  margin-top: 44px;
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-bottom: 60px;
}

.skill-group {
  padding: 26px;
}

.skill-group h3 {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--text);
}

.skill-bar {
  margin-bottom: 16px;
}

.skill-bar__label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.skill-bar__track {
  height: 6px;
  border-radius: 4px;
  background: var(--surface-2);
  overflow: hidden;
}

.skill-bar__fill {
  height: 100%;
  width: 0%;
  border-radius: 4px;
  background: var(--gradient-primary);
  transition: width 1.2s var(--ease);
}

.tech-stack__row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.tech-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.85rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.tech-chip:hover {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.tech-chip__icon {
  width: 18px;
  height: 18px;
  color: var(--cyan);
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 34px;
  padding-left: 34px;
  border-left: 1px solid var(--border);
}

.timeline__dot {
  position: absolute;
  left: -41px;
  top: 30px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--purple);
  background: var(--bg);
}

.timeline__content {
  padding: 26px;
}

.timeline__year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--purple);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.timeline__content h3 {
  font-size: 1.1rem;
  margin: 8px 0;
}

.timeline__content p {
  color: var(--text-muted);
}

/* ---------- Achievements ---------- */
.achievement-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.achievement-card {
  padding: 28px;
}

.achievement-card__icon {
  width: 32px;
  height: 32px;
  color: var(--cyan);
  margin-bottom: 16px;
}

.achievement-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.achievement-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* ---------- Services ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  padding: 30px;
  transition: transform var(--transition-med), border-color var(--transition-med);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
}

.service-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.service-card__icon svg {
  width: 22px;
  height: 22px;
  color: var(--text);
}

.service-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ---------- Stats ---------- */
.stat-section {
  padding: 90px 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-item p {
  color: var(--text-muted);
  margin-top: 8px;
  font-size: 0.9rem;
}

/* ---------- Certificates ---------- */
.cert-placeholder {
  padding: 44px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.cert-placeholder__icon {
  width: 40px;
  height: 40px;
  color: var(--text-faint);
  flex-shrink: 0;
}

.cert-placeholder p {
  color: var(--text-muted);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.contact-card {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform var(--transition-med), border-color var(--transition-med);
}

.contact-card:hover {
  transform: translateY(-6px);
  border-color: var(--cyan);
}

.contact-card__icon {
  width: 26px;
  height: 26px;
  color: var(--cyan);
  margin-bottom: 8px;
}

.contact-card span {
  font-weight: 700;
  font-size: 1rem;
}

.contact-card p {
  color: var(--text-muted);
  font-size: 0.85rem;
  word-break: break-word;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 44px 0;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.site-footer p {
  color: var(--text-faint);
  font-size: 0.85rem;
}

.site-footer__year {
  color: var(--text-faint);
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: 90;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
  color: var(--cyan);
}

.back-to-top:hover {
  border-color: var(--cyan);
  transform: translateY(-3px);
}