/* ==========================================================
   STYLE SHEET
   The easiest things to customise are the colours just below.
   Change a value, save, redeploy — that's it.
   ========================================================== */

:root {
  /* ✏️ EDIT: The site's colour scheme */
  --bg: #0f172a;           /* page background (dark navy) */
  --bg-card: #1e293b;      /* card background */
  --text: #e2e8f0;         /* main text (light grey) */
  --text-muted: #94a3b8;   /* secondary text */
  --accent: #38bdf8;       /* highlight colour (sky blue) */
}

/* ---- Basics ---- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth; /* smooth scrolling for nav links */
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* ---- Navigation bar ---- */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bg-card);
  z-index: 10;
}

.logo {
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--accent);
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--accent);
}

/* ---- Hero ---- */
.hero {
  max-width: 800px;
  margin: 0 auto;
  padding: 7rem 2rem 5rem;
}

.hero-hello {
  color: var(--accent);
  font-family: monospace;
  margin-bottom: 0.5rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  line-height: 1.1;
}

.hero-tagline {
  font-size: clamp(1.2rem, 3.5vw, 2rem);
  color: var(--text-muted);
  font-weight: 600;
  margin: 0.5rem 0 1.5rem;
}

.hero-intro {
  max-width: 540px;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* ---- Buttons & links ---- */
.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  text-decoration: none;
  transition: background 0.2s;
}

.button:hover {
  background: rgba(56, 189, 248, 0.1);
}

a {
  color: var(--accent);
}

/* ---- Sections ---- */
section {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  padding-bottom: 0.25rem;
}

section p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* ---- Project cards ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border-radius: 10px;
  padding: 1.5rem;
  transition: transform 0.2s;
}

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

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.95rem;
}

.tags {
  font-family: monospace;
  font-size: 0.8rem !important;
  color: var(--accent) !important;
}

/* ---- Skills ---- */
.skills-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
}

.skills-columns h3 {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

.skills-columns ul {
  list-style: none;
}

.skills-columns li {
  color: var(--text-muted);
  padding: 0.2rem 0;
}

.skills-columns li::before {
  content: "▸ ";
  color: var(--accent);
}

/* ---- Contact ---- */
.contact-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-top: 1rem;
}

/* ---- Footer ---- */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--bg-card);
  margin-top: 3rem;
}