/* ============================================================
   Abhilash Bandari — portfolio
   Dark, minimal, backend-engineer aesthetic.
   ============================================================ */

:root {
  --bg: #0a0e14;
  --bg-alt: #0d1220;
  --surface: #111827;
  --surface-raised: #151d2e;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.28);

  --text: #e5eaf2;
  --text-secondary: #9aa6b8;
  --text-muted: #64748b;

  --accent: #34d399;
  --accent-dim: rgba(52, 211, 153, 0.12);
  --accent-border: rgba(52, 211, 153, 0.35);
  --accent-contrast: #06281c;

  --go: #4dd0e1;
  --python: #fbbf24;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius: 12px;
  --radius-sm: 8px;
  --container: 1080px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Faint grid backdrop */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 30%, transparent 75%);
}

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s var(--ease);
}

a:hover {
  color: #6ee7b7;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: var(--accent-contrast);
}

.btn--primary:hover {
  background: #6ee7b7;
  color: var(--accent-contrast);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(52, 211, 153, 0.25);
}

.btn--outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}

.btn--outline:hover {
  border-color: var(--accent-border);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn--sm {
  padding: 6px 14px;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 13px 28px;
  font-size: 1rem;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease);
}

.navbar.scrolled {
  border-bottom-color: var(--border);
}

.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
}

.logo-mark {
  color: var(--accent);
}

.logo-cursor {
  animation: blink 1.1s steps(1) infinite;
  color: var(--text-secondary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: width 0.25s var(--ease);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
}

.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle .bar {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s var(--ease);
}

.nav-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active .bar:nth-child(2) { opacity: 0; }
.nav-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  padding: 170px 0 90px;
  position: relative;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 26px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: pulse 2.2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.hero-title {
  font-size: clamp(2.6rem, 6.5vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  margin-bottom: 10px;
  background: linear-gradient(120deg, #f1f5f9 40%, #94f3cf 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.2vw, 1.4rem);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 26px;
}

.hero-description {
  max-width: 620px;
  font-size: 1.08rem;
  color: var(--text-secondary);
  margin-bottom: 34px;
}

.hero-description strong {
  color: var(--text);
  font-weight: 600;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.hero-social {
  display: flex;
  gap: 12px;
  margin-bottom: 70px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--surface);
  transition: all 0.2s var(--ease);
}

.social-link:hover {
  color: var(--accent);
  border-color: var(--accent-border);
  transform: translateY(-2px);
}

/* Stats band */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stat {
  background: var(--surface);
  padding: 26px 24px;
  transition: background 0.25s var(--ease);
}

.stat:hover {
  background: var(--surface-raised);
}

.stat dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat dd {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.stat p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---------- Sections ---------- */
.section {
  padding: 96px 0;
}

.section--alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  margin-bottom: 48px;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}

.section-index::after {
  content: " /";
  color: var(--text-muted);
}

.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  font-weight: 700;
}

.section-subtitle {
  margin: 12px 0 0;
  color: var(--text-secondary);
  max-width: 560px;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-text p {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.about-text strong {
  color: var(--text);
  font-weight: 600;
}

.skills {
  display: grid;
  gap: 26px;
}

.skill-group h3 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 999px;
  transition: all 0.2s var(--ease);
}

.tags li:hover {
  color: var(--accent);
  border-color: var(--accent-border);
}

.tags--sm li {
  font-size: 0.7rem;
  padding: 2px 9px;
  background: transparent;
}

/* ---------- Experience timeline ---------- */
.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 32px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.timeline-item:hover {
  border-color: var(--accent-border);
  transform: translateY(-2px);
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.83rem;
  color: var(--accent);
}

.timeline-location {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.timeline-body h3 {
  font-size: 1.2rem;
  font-weight: 650;
  margin-bottom: 3px;
}

.timeline-company {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.timeline-body ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 9px;
}

.timeline-body li {
  color: var(--text-secondary);
  font-size: 0.96rem;
}

.timeline-body li::marker {
  color: var(--accent);
}

.timeline-body strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.project-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.project-lang {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 11px;
  border-radius: 999px;
  border: 1px solid;
}

.project-lang[data-lang="go"] {
  color: var(--go);
  border-color: rgba(77, 208, 225, 0.35);
  background: rgba(77, 208, 225, 0.08);
}

.project-lang[data-lang="python"] {
  color: var(--python);
  border-color: rgba(251, 191, 36, 0.35);
  background: rgba(251, 191, 36, 0.08);
}

.project-links a {
  color: var(--text-muted);
  display: inline-flex;
}

.project-links a:hover {
  color: var(--text);
}

.project-title {
  font-family: var(--font-mono);
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.project-description {
  color: var(--text-secondary);
  font-size: 0.94rem;
  flex-grow: 1;
}

.project-blog {
  font-size: 0.88rem;
  font-weight: 600;
}

.project-blog--muted {
  color: var(--text-muted);
  font-weight: 500;
}

/* ---------- Blog ---------- */
.blog-list {
  display: grid;
  gap: 14px;
}

.blog-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  color: inherit;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.blog-card:hover {
  border-color: var(--accent-border);
  transform: translateX(4px);
  color: inherit;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.blog-meta time {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.blog-card h3 {
  font-size: 1.12rem;
  font-weight: 650;
  margin-bottom: 8px;
  color: var(--text);
}

.blog-card:hover h3 {
  color: var(--accent);
}

.blog-card p {
  color: var(--text-secondary);
  font-size: 0.93rem;
  margin-bottom: 10px;
  max-width: 680px;
}

.blog-read {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

.blog-more {
  margin-top: 34px;
  text-align: center;
}

/* ---------- Contact ---------- */
.contact-card {
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-raised) 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 52px 40px;
  text-align: center;
}

.contact-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 30px;
}

.contact-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.contact-links {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.contact-links span {
  color: var(--text-muted);
}

/* ---------- Footer ---------- */
.footer {
  padding: 34px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .status-dot, .logo-cursor { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .timeline-meta {
    flex-direction: row;
    gap: 14px;
    align-items: baseline;
  }
}

@media (max-width: 720px) {
  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: center;
    gap: 22px;
    padding: 28px 0 32px;
    background: rgba(10, 14, 20, 0.97);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-130%);
    transition: transform 0.3s var(--ease);
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 130px 0 70px;
  }

  .section {
    padding: 70px 0;
  }

  .contact-card {
    padding: 40px 22px;
  }
}

@media (max-width: 520px) {
  .stats {
    grid-template-columns: 1fr;
  }

  .hero-buttons .btn {
    flex: 1;
  }
}