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

:root {
  --color-bg: #0b1120;
  --color-bg-elevated: #111827;
  --color-grid-line: rgba(148, 163, 184, 0.06);
  --color-text-primary: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-accent-cyan: #22d3ee;
  --color-accent-cyan-dim: rgba(34, 211, 238, 0.15);
  --color-accent-amber: #f5a524;
  --color-accent-amber-dim: rgba(245, 165, 36, 0.15);
  --color-accent-green: #4ade80;
  --color-accent-green-dim: rgba(74, 222, 128, 0.15);
  --color-border: rgba(148, 163, 184, 0.12);
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-body: 'IBM Plex Sans', sans-serif;
  --radius: 10px;
  --max-width: 1100px;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

:focus-visible {
  outline: 2px solid var(--color-accent-cyan);
  outline-offset: 2px;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

h1, h2, h3 {
  font-family: var(--font-display);
  margin: 0;
}

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--color-accent-cyan);
  margin: 0 0 0.75rem;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin-bottom: 2rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

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

.btn--primary {
  background: var(--color-accent-cyan);
  color: #0b1120;
}

.btn--primary:hover, .btn--primary:focus-visible {
  background: #67e8f9;
}

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

.btn--ghost:hover, .btn--ghost:focus-visible {
  border-color: var(--color-accent-cyan);
  color: var(--color-accent-cyan);
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 17, 32, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.topbar__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.topbar__logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}

.topbar__logo .dot {
  color: var(--color-accent-cyan);
}

.topbar__nav {
  display: flex;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.topbar__nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

.topbar__nav a:hover, .topbar__nav a:focus-visible {
  color: var(--color-text-primary);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-accent-green);
  border: 1px solid var(--color-accent-green-dim);
  background: var(--color-accent-green-dim);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
}

.status-badge__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-green);
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5); }
  50% { opacity: 0.4; box-shadow: 0 0 0 4px rgba(74, 222, 128, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .status-badge__dot {
    animation: none;
  }
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  overflow: hidden;
}

.lang-toggle__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 0.75rem;
  background: transparent;
  border: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.lang-toggle__btn:hover, .lang-toggle__btn:focus-visible {
  color: var(--color-text-primary);
}

.lang-toggle__btn[aria-pressed="true"] {
  background: var(--color-accent-cyan);
  color: var(--color-bg);
}

.lang-toggle__btn[aria-pressed="true"]:hover, .lang-toggle__btn[aria-pressed="true"]:focus-visible {
  color: var(--color-bg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 6rem 1.5rem 5rem;
  display: flex;
  justify-content: center;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, var(--color-grid-line) 0, var(--color-grid-line) 1px, transparent 1px, transparent 48px),
    repeating-linear-gradient(90deg, var(--color-grid-line) 0, var(--color-grid-line) 1px, transparent 1px, transparent 48px),
    radial-gradient(circle at 50% 20%, rgba(34, 211, 238, 0.12), transparent 60%);
  animation: drift 18s ease-in-out infinite alternate;
}

@keyframes drift {
  from { transform: translate(0, 0); }
  to { transform: translate(-20px, 20px); }
}

.hero__inner {
  position: relative;
  max-width: 960px;
  width: 100%;
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 2.5rem;
}

.hero__text {
  max-width: 720px;
  text-align: center;
}

.hero__photo {
  flex-shrink: 0;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: var(--color-bg-elevated);
  border: 2px solid var(--color-accent-cyan);
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__photo-initials {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-text-primary);
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-accent-amber);
  margin: 0 0 1.25rem;
}

.hero__name {
  font-size: clamp(2.5rem, 7vw, 4rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hero__role {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  color: var(--color-text-secondary);
  margin: 0 0 1.5rem;
  font-weight: 500;
}

.hero__tagline {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--color-accent-cyan);
  min-height: 1.5em;
  margin: 0 0 2.5rem;
}

.cursor {
  animation: blink-cursor 1s step-end infinite;
}

@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero__ctas {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero load-in stagger */
.reveal-item {
  opacity: 0;
  transform: translateY(16px);
  animation: reveal-up 0.6s ease forwards;
}

.hero__eyebrow.reveal-item { animation-delay: 0.1s; }
.hero__name.reveal-item { animation-delay: 0.3s; }
.hero__role.reveal-item { animation-delay: 0.5s; }
.hero__tagline.reveal-item { animation-delay: 0.7s; }
.hero__ctas.reveal-item { animation-delay: 1.5s; }
.hero__photo.reveal-item { animation-delay: 0.05s; }

@keyframes reveal-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal-item, .cursor, .hero__bg {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ---------- About ---------- */
.about__bio {
  max-width: 640px;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}

.stat-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.stat-chip {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}

.stat-chip__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--color-accent-cyan);
  font-weight: 600;
}

.stat-chip__label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* ---------- Skills ---------- */
.skills__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.skill-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.skill-card__title {
  font-size: 1.05rem;
  margin-bottom: 1rem;
  color: var(--color-text-primary);
}

.skill-card__list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  padding: 0.35rem 0;
  border-top: 1px solid var(--color-border);
}

.skill-card__list li:first-child {
  border-top: none;
}

.skill-level {
  display: inline-flex;
  gap: 4px;
  flex-shrink: 0;
}

.skill-level i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-border);
  font-style: normal;
}

.skill-level[data-level="1"] i:nth-child(-n+1),
.skill-level[data-level="2"] i:nth-child(-n+2),
.skill-level[data-level="3"] i:nth-child(-n+3),
.skill-level[data-level="4"] i:nth-child(-n+4),
.skill-level[data-level="5"] i:nth-child(-n+5) {
  background: var(--color-accent-cyan);
}

@media (min-width: 640px) {
  .stat-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 720px) {
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .skills__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 768px) {
  .hero__inner {
    flex-direction: row;
    justify-content: center;
  }

  .hero__text {
    text-align: left;
  }

  .hero__ctas {
    justify-content: flex-start;
  }

  .hero__photo {
    width: 140px;
    height: 140px;
  }

  .hero__photo-initials {
    font-size: 2rem;
  }
}

/* ---------- Projects ---------- */
.projects__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.project-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-card__name {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--color-text-primary);
}

.project-card__desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin: 0;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-amber);
  background: var(--color-accent-amber-dim);
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent-cyan);
  margin-top: auto;
  transition: opacity 0.15s ease;
}

.project-card__link:hover, .project-card__link:focus-visible {
  opacity: 0.75;
}

@media (min-width: 720px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Contact ---------- */
.contact__line {
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
}

.contact__links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}

.site-footer__status {
  font-family: var(--font-mono);
  color: var(--color-accent-cyan);
  margin-top: 0.5rem;
}

/* ---------- Scroll reveal (JS-driven) ---------- */
.js .reveal-group {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-group.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal-group {
    transition: none;
  }
}