/* ============================================================
   MAIN.CSS — Global Reset, Typography, Base Styles
   Supath Dhital Portfolio
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=DM+Serif+Display&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 18px; }

body {
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

/* Only animate background/color during an explicit theme switch */
body.theme-transitioning,
body.theme-transitioning * {
  transition: background-color 0.3s ease, color 0.3s ease,
              border-color 0.3s ease !important;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-heading);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
h5 { font-size: 0.95rem; }

p { color: var(--text-secondary); line-height: 1.76; font-size: 1rem; }

a { color: var(--accent-blue); text-decoration: none; transition: color 0.2s, opacity 0.2s; }
a:hover { color: var(--accent-blue-dark); text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }

.section-header { margin-bottom: 3rem; }
.section-header .section-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-blue);
  margin-bottom: 0.4rem;
}
.section-header h2 { margin-bottom: 0.75rem; }
.section-header .section-desc { color: var(--text-muted); max-width: 560px; font-size: 1rem; }
.section-header .accent-line {
  width: 2.5rem; height: 3px;
  background: var(--accent-blue);
  border-radius: 2px;
  margin-top: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.65rem 1.4rem; border-radius: 8px;
  font-size: 0.95rem; font-weight: 500; transition: background-color 0.2s, color 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  text-decoration: none !important;
}
.btn-primary { background: var(--accent-blue); color: #fff !important; border: 2px solid var(--accent-blue); }
.btn-primary:hover { background: var(--accent-blue-dark); border-color: var(--accent-blue-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(14,118,218,0.25); }
.btn-outline { background: transparent; color: var(--accent-blue) !important; border: 2px solid var(--accent-blue); }
.btn-outline:hover { background: var(--accent-blue); color: #fff !important; transform: translateY(-1px); }
.btn-ghost { background: var(--bg-secondary); color: var(--text-primary) !important; border: 2px solid var(--border-color); }
.btn-ghost:hover { border-color: var(--accent-blue); color: var(--accent-blue) !important; }

/* Cards */
.card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 12px; overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 32px var(--shadow-color); border-color: var(--accent-blue-soft); }

/* Tags */
.tag {
  display: inline-block; padding: 0.2rem 0.65rem;
  background: var(--tag-bg); color: var(--tag-text);
  border-radius: 100px; font-size: 0.75rem; font-weight: 500;
}
.tag-blue { background: var(--accent-blue-soft); color: var(--accent-blue); }

/* Keep navigation instant: content should not re-fade on every page click. */
.fade-up,
.fade-in,
.stagger > * {
  opacity: 1;
  transform: none;
}

/* Grid */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px,1fr)); gap: 1.5rem; }

@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 640px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .section { padding: 3rem 0; }
}

/* Misc */
.divider { height: 1px; background: var(--border-color); margin: 2rem 0; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-blue); }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.75rem; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-blue); }
::selection { background: var(--accent-blue-soft); color: var(--accent-blue-dark); }
:focus-visible { outline: 2px solid var(--accent-blue); outline-offset: 3px; border-radius: 4px; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border-width:0; }