/* ============================================================
   Pramod Gobburi — Portfolio
   Theme: Modern Dark + Gradient
   ============================================================ */

:root {
  --bg:            #0a0a12;
  --bg-soft:       #10101c;
  --surface:       rgba(255, 255, 255, 0.03);
  --surface-2:     rgba(255, 255, 255, 0.05);
  --border:        rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text:          #ecedf5;
  --text-dim:      #a5a7ba;
  --text-faint:    #6c6f85;

  --accent:        #7c5cff;
  --accent-2:      #22d3ee;
  --accent-3:      #f472b6;
  --grad:          linear-gradient(120deg, var(--accent), var(--accent-2) 55%, var(--accent-3));

  --radius:        18px;
  --radius-sm:     12px;
  --maxw:          1080px;
  --font-display:  "Space Grotesk", system-ui, sans-serif;
  --font-body:     "Inter", system-ui, sans-serif;
  --font-mono:     "JetBrains Mono", ui-monospace, monospace;

  --ease:          cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* ---------- Ambient background ---------- */
.bg-gradient {
  position: fixed;
  inset: -20% -20% auto -20%;
  height: 90vh;
  z-index: -2;
  background:
    radial-gradient(40% 55% at 20% 15%, rgba(124, 92, 255, 0.30), transparent 60%),
    radial-gradient(35% 45% at 80% 10%, rgba(34, 211, 238, 0.22), transparent 60%),
    radial-gradient(45% 50% at 55% 45%, rgba(244, 114, 182, 0.14), transparent 60%);
  filter: blur(30px);
  animation: drift 18s var(--ease) infinite alternate;
}
@keyframes drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(0, 3%, 0) scale(1.08); }
}
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(80% 60% at 50% 0%, #000 30%, transparent 90%);
}
@media (prefers-reduced-motion: reduce) { .bg-gradient { animation: none; } }

/* ---------- Layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.section { padding: 88px 0; scroll-margin-top: 90px; }
.section__head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 40px; }
.section__index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-2);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 6px;
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px;
  transition: padding 0.3s var(--ease);
}
.nav.scrolled {
  padding: 10px 24px;
  background: rgba(10, 10, 18, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  border-radius: 0 0 16px 16px;
}
.nav__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav__links { display: flex; gap: 26px; margin-left: auto; }
.nav__links a {
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color 0.2s;
  position: relative;
}
.nav__links a:hover { color: var(--text); }
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: var(--grad);
  transition: width 0.25s var(--ease);
}
.nav__links a:hover::after { width: 100%; }
.nav__resume { margin-left: 4px; }
@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav__resume { margin-left: auto; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.25s, background 0.25s, border-color 0.25s;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: linear-gradient(120deg, #7c5cff, #22d3ee, #f472b6);
  background-size: 300% 300%;
  animation: grad-shift 3s ease-in-out infinite alternate;
  color: #0a0a12;
  font-weight: 600;
  box-shadow: 0 8px 30px rgba(124, 92, 255, 0.35);
  font-size: 1rem;
  padding: 13px 26px;
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(124, 92, 255, 0.5); }
@keyframes grad-shift {
  0%   { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}
.btn--ghost {
  border-color: var(--border-strong);
  color: var(--text);
  background: var(--surface);
}
.btn--ghost:hover { border-color: var(--accent); background: var(--surface-2); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero {
  padding: 120px 0 60px;
  display: grid;
  grid-template-columns: 1fr 460px;
  align-items: center;
  gap: 40px;
}
.hero__3d {
  position: relative;
  height: 500px;
}
.hero__3d canvas {
  display: block;
  width: 100%;
  height: 100%;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero__3d { display: none; }
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero__eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.6);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.5); }
  70%  { box-shadow: 0 0 0 9px rgba(34, 211, 238, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0); }
}
.hero__name {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 9vw, 5.4rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.03em;
  background: linear-gradient(180deg, #fff, #c8c9de);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.5vw, 1.9rem);
  font-weight: 500;
  margin-top: 8px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__tagline {
  max-width: 620px;
  margin-top: 22px;
  font-size: 1.08rem;
  color: var(--text-dim);
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero__socials { display: flex; gap: 12px; margin-top: 34px; }

/* social icon buttons */
.social {
  display: inline-grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  transition: all 0.2s var(--ease);
}
.social:hover {
  color: var(--text);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.25);
}
.social svg { width: 20px; height: 20px; }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1.6fr 1fr; gap: 44px; }
.about__body p { color: var(--text-dim); font-size: 1.06rem; margin-bottom: 18px; }
.about__body p:first-child { color: var(--text); font-size: 1.14rem; }
.about__skills-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-faint);
  margin-bottom: 16px;
}
.skills { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.skills li {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 0.9rem;
  padding: 9px 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  transition: all 0.2s var(--ease);
}
.skills li:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-2px); }
.skills li i { font-size: 1.15rem; }
@media (max-width: 760px) { .about { grid-template-columns: 1fr; gap: 30px; } }

/* ---------- Timeline / Experience ---------- */
.timeline { list-style: none; position: relative; padding-left: 26px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
}
.tl-item { position: relative; padding: 0 0 34px 26px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -26px; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.12);
}
.tl-item__head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.tl-item__logo {
  width: 34px; height: 34px;
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  padding: 4px;
}
.tl-item__role { font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; }
.tl-item__company { color: var(--accent-2); font-weight: 500; }
.tl-item__period {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  margin-left: auto;
}
.tl-item__list { list-style: none; margin-top: 12px; display: grid; gap: 8px; }
.tl-item__list li {
  position: relative;
  padding-left: 20px;
  color: var(--text-dim);
  font-size: 0.98rem;
}
.tl-item__list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
}
@media (max-width: 600px) { .tl-item__period { margin-left: 0; width: 100%; } }

/* ---------- Projects ---------- */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  backdrop-filter: blur(6px);
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.card::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 22px 60px rgba(0,0,0,0.5); }
.card:hover::after { opacity: 1; }
.card--featured { grid-column: span 1; }
.card__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, #171728, #0d0d18);
  border-bottom: 1px solid var(--border);
}
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--ease); }
.card:hover .card__media img { transform: scale(1.05); }
.card__body { padding: 20px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.card__title { font-family: var(--font-display); font-size: 1.22rem; font-weight: 600; }
.card__desc { color: var(--text-dim); font-size: 0.95rem; flex: 1; }
.card__tags { display: flex; flex-wrap: wrap; gap: 7px; }
.card__tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 6px;
}
.card__links { display: flex; gap: 14px; margin-top: 4px; }
.card__links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--accent-2);
  transition: color 0.2s;
}
.card__links a:hover { color: var(--text); }
.card__links a::after { content: "↗"; font-size: 0.8em; }
@media (max-width: 720px) { .projects { grid-template-columns: 1fr; } }

/* ---------- Education ---------- */
.education { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.edu {
  display: flex;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.25s, transform 0.25s var(--ease);
}
.edu:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.edu__logo {
  width: 48px; height: 48px;
  flex-shrink: 0;
  object-fit: contain;
  border-radius: 10px;
  background: #fff;
  padding: 6px;
}
.edu__school { font-family: var(--font-display); font-weight: 600; font-size: 1.08rem; }
.edu__degree { color: var(--accent-2); font-size: 0.92rem; margin-top: 2px; }
.edu__period { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); margin: 6px 0; }
.edu__detail { color: var(--text-dim); font-size: 0.92rem; }
@media (max-width: 720px) { .education { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--maxw);
  margin: 40px auto 0;
  padding: 48px 24px 60px;
  border-top: 1px solid var(--border);
  text-align: center;
  display: grid;
  gap: 18px;
  justify-items: center;
}
.footer__name { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; }
.footer__socials { display: flex; gap: 12px; }
.footer__meta { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- Toast (fallback / status) ---------- */
.toast {
  position: fixed;
  left: 50%; bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-soft);
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 10px 16px;
  border-radius: 10px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s var(--ease);
  z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Loading skeleton ---------- */
.skeleton { color: transparent !important; position: relative; }

/* ---------- Error state ---------- */
.load-error {
  max-width: 520px;
  margin: 120px auto;
  text-align: center;
  color: var(--text-dim);
}
.load-error h2 { font-family: var(--font-display); color: var(--text); margin-bottom: 10px; }