/* ============================================================
   Portfolio — retro-coding dark theme
   Customize quickly via the CSS variables in :root below.
   ============================================================ */

:root {
  /* Colors */
  --bg:            #0d1117;   /* page background (near-black) */
  --bg-elevated:   #161b22;   /* cards / raised surfaces      */
  --border:        #21262d;   /* subtle borders               */
  --text:          #e6edf3;   /* primary text (soft off-white)*/
  --text-muted:    #8b949e;   /* secondary text               */
  --accent:        #3fb950;   /* terminal accent (green)      */
  --accent-soft:   rgba(63, 185, 80, 0.12);

  /* Type */
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --font-sans: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  /* Layout */
  --maxw: 1040px;
  --radius: 10px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color .15s ease, opacity .15s ease; }
a:hover { opacity: .8; }

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

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}
.nav__logo:hover { color: var(--accent); opacity: 1; }

.nav__menu {
  display: flex;
  gap: 28px;
  font-family: var(--font-mono);
  font-size: .95rem;
}
.nav__menu a { color: var(--text-muted); }
.nav__menu a::before { content: ""; color: var(--accent); margin-right: 2px; }
.nav__menu a:hover,
.nav__menu a.is-active { color: var(--accent); opacity: 1; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav__toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: transform .25s ease, opacity .25s ease;
}

/* ---------- Hero ---------- */
.hero {
  padding: clamp(80px, 16vh, 160px) 0 80px;
}
.hero__greeting {
  font-family: var(--font-mono);
  color: var(--accent);
  margin: 0 0 12px;
}
.hero__name {
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 1.05;
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.hero__tagline {
  font-size: clamp(1.5rem, 5vw, 3rem);
  line-height: 1.1;
  margin: 6px 0 24px;
  color: var(--text-muted);
  font-weight: 600;
}
.hero__terminal {
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
  margin: 0 0 28px;
}
.prompt { color: var(--accent); font-family: var(--font-mono); }
.typed { white-space: pre; }
.cursor {
  display: inline-block;
  width: 9px;
  height: 1.1em;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__intro {
  max-width: 560px;
  color: var(--text-muted);
  margin: 0 0 36px;
}

.hero__cta { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--font-mono);
  font-size: .95rem;
  padding: 13px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  transition: background .18s ease, transform .12s ease, opacity .18s ease;
}
.btn:hover { opacity: 1; transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: var(--bg); font-weight: 600; }
.btn--primary:hover { background: var(--accent); }
.btn--ghost { background: transparent; color: var(--accent); }
.btn--ghost:hover { background: var(--accent-soft); }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }

.section__title {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 2rem);
  margin: 0 0 36px;
  font-weight: 700;
}
.comment { color: var(--text-muted); }
.section__title .prompt { color: var(--accent); }

.about p { max-width: 720px; color: var(--text-muted); }
.about p + p { margin-top: 18px; }

/* ---------- Skills ---------- */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}
.skills__heading {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text);
  margin: 0 0 16px;
}

.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
}
.tags--small .tag { font-size: .78rem; padding: 4px 10px; }

/* ---------- Projects ---------- */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-6px); border-color: var(--accent); }

.card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.card__icon {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.4rem;
}
.card__links {
  display: flex;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: .85rem;
}
.card__links a { color: var(--text-muted); }
.card__links a:hover { color: var(--accent); opacity: 1; }

.card__title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  margin: 0 0 10px;
}
.card__desc { color: var(--text-muted); margin: 0 0 18px; font-size: .95rem; }
.card .tags { margin-bottom: 18px; }

.card__cta {
  font-family: var(--font-mono);
  font-size: .9rem;
  margin-top: auto;
}

/* ---------- Contact ---------- */
.section--contact { text-align: center; }
.contact__lead {
  max-width: 520px;
  margin: 0 auto 28px;
  color: var(--text-muted);
}
.contact__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 28px;
  font-family: var(--font-mono);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
}
.footer p {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--text-muted);
  margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .nav__toggle { display: flex; }

  .nav__menu {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }
  .nav__menu.is-open { max-height: 320px; }
  .nav__menu li { width: 100%; }
  .nav__menu a {
    display: block;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
  }

  /* Hamburger -> X when open */
  .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); }

  .section { padding: 60px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
  * { transition: none !important; }
}