/* ── Theme variables ── */
:root {
  --background: #f9f9f9;
  --foreground: #101011;
  --primary: #2563eb;
  --primary-rgb: 37,99,235;
}
.dark {
  --background: #090909;
  --foreground: #f1f1f1;
  --primary: #3b82f6;
  --primary-rgb: 59,130,246;
}

/* ── Base reset ── */
* {
  scroll-behavior: smooth;
  box-sizing: border-box;
}

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: 'Inter', system-ui, sans-serif;
  transition: background-color 0.3s, color 0.3s;
  margin: 0;
}

/* ── Utility colour helpers ── */
.text-primary   { color: var(--primary); }
.bg-primary     { background-color: var(--primary); }
.border-primary { border-color: var(--primary); }

/* ── Custom scrollbar ── */
::-webkit-scrollbar       { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ── Typing cursor on hero ── */
#typing-text::after {
  content: '|';
  color: var(--primary);
  animation: blink 1s step-end infinite;
}

/* ── Keyframes ── */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Scroll-reveal animation ── */
.anim         { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.anim.visible { opacity: 1; transform: translateY(0); }

/* ── Section default padding ── */
section { padding: 96px 0; }

/* ── Experience card hover glow ── */
.card:hover {
  box-shadow:
    0 0 0 1px rgba(var(--primary-rgb), 0.3),
    0 8px 32px rgba(var(--primary-rgb), 0.08);
}

/* ── Skill icon dark-mode invert ── */
.dark .icon-invert { filter: invert(1); }

/* ── Timeline vertical line ── */
.tl-line {
  position: absolute;
  left: 7px;
  top: 20px;
  bottom: 0;
  width: 1px;
  background: rgba(var(--primary-rgb), 0.2);
}

/* ── Active nav link ── */
.nav-link.active { color: var(--primary); opacity: 1; }

/* ── Hero decorative blobs ── */
.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.12;
  pointer-events: none;
}

/* ── Hidden utility (used by theme toggle icons) ── */
.hidden { display: none !important; }

/* ── Experience timeline ── */
.tl-entry {
  display: grid;
  grid-template-columns: 1fr 48px 1fr;
  margin-bottom: 56px;
  align-items: center;
}
.tl-card { border-radius: 14px; border: 1px solid rgba(128,128,128,0.12); padding: 24px; transition: all 0.3s ease; cursor: default; }
.tl-dot  { display: flex; align-items: center; justify-content: center; z-index: 1; }

@media (max-width: 640px) {
  .tl-center-line { display: none; }
  .tl-entry { grid-template-columns: 1fr; }
  .tl-dot   { display: none; }
  .tl-right-col, .tl-left-col { grid-column: 1; text-align: left !important; }
  .tl-right-col .tl-tags { justify-content: flex-start !important; }
  .tl-left-col  .tl-tags { justify-content: flex-start !important; }
  .tl-spacer { display: none; }
}