/* ============================================================
   style.css — Pronay Sarker Developer Portfolio
   ============================================================ */

/* ============================================================
   CSS Custom Properties
   ============================================================ */

:root {
  /* Dark theme (default) */
  --bg:           #0d1117;
  --bg-subtle:    #161b22;
  --bg-card:      #1c2128;
  --bg-card-h:    #21262d;
  --border:       #30363d;
  --border-sub:   #21262d;
  --text:         #e6edf3;
  --text-muted:   #8b949e;
  --text-subtle:  #6e7681;
  --accent:       #58a6ff;
  --accent-h:     #79c0ff;
  --accent-sub:   rgba(88, 166, 255, 0.08);
  --success:      #3fb950;
  --tag-bg:       #1a3349;
  --tag-text:     #79c0ff;
  --nav-bg:       rgba(13, 17, 23, 0.88);
  --shadow-sm:    0 1px 3px rgba(0,0,0,.4);
  --shadow-md:    0 4px 16px rgba(0,0,0,.3);
  --shadow-lg:    0 8px 32px rgba(0,0,0,.4);

  /* Fonts */
  --sans:  system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono:  ui-monospace, "SF Mono", "Cascadia Code", "Cascadia Mono", "Segoe UI Mono", "Liberation Mono", Menlo, monospace;

  /* Layout */
  --max:      1100px;
  --nav-h:    64px;
  --r:        8px;
  --r-sm:     4px;
  --r-lg:     12px;
  --t:        200ms ease;
}

[data-theme="light"] {
  --bg:           #f6f8fa;
  --bg-subtle:    #ffffff;
  --bg-card:      #ffffff;
  --bg-card-h:    #f6f8fa;
  --border:       #d0d7de;
  --border-sub:   #eaeef2;
  --text:         #1f2328;
  --text-muted:   #656d76;
  --text-subtle:  #9198a1;
  --accent:       #0969da;
  --accent-h:     #0550ae;
  --accent-sub:   rgba(9, 105, 218, 0.08);
  --success:      #1a7f37;
  --tag-bg:       #ddf4ff;
  --tag-text:     #0550ae;
  --nav-bg:       rgba(246, 248, 250, 0.88);
  --shadow-sm:    0 1px 3px rgba(0,0,0,.08);
  --shadow-md:    0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:    0 8px 32px rgba(0,0,0,.12);
}

/* ============================================================
   Reset & Base
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  transition: background var(--t), color var(--t);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color var(--t); }
a:hover { color: var(--accent-h); }
img { max-width: 100%; height: auto; display: block; }

/* ============================================================
   Layout helpers
   ============================================================ */

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

/* ============================================================
   Navigation
   ============================================================ */

nav {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--nav-h);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--t), border-color var(--t);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Logo */
.nav-logo {
  font-family: var(--mono);
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.01em;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.nav-logo .prompt { color: var(--accent); }
.nav-logo:hover { color: var(--text); }

/* Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--t);
}

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

/* Right side (links + toggle) */
.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Theme toggle button */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 6px 10px;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: .75rem;
  transition: border-color var(--t), color var(--t);
  white-space: nowrap;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

/* Mobile hamburger */
.nav-burger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 6px;
  cursor: pointer;
  color: var(--text-muted);
  align-items: center;
  justify-content: center;
}

.nav-burger svg { width: 18px; height: 18px; }

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg-subtle);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 20px;
    gap: 16px;
    box-shadow: var(--shadow-md);
  }

  .nav-links.open { display: flex; }

  .nav-burger { display: flex; }
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--r);
  font-size: .875rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-h);
  border-color: var(--accent-h);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}

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

.btn-sm {
  padding: 6px 14px;
  font-size: .8rem;
}

/* ============================================================
   Section base
   ============================================================ */

.section { padding: 72px 0; }
.section + .section { border-top: 1px solid var(--border); }

.section-label {
  display: block;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--accent);
  letter-spacing: .08em;
  margin-bottom: 10px;
}

.section-label::before { content: '// '; opacity: .6; }

.section-title {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -.025em;
  color: var(--text);
  line-height: 1.15;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-muted);
  max-width: 540px;
  line-height: 1.7;
}

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

/* ============================================================
   Hero
   ============================================================ */

.hero { padding: 96px 0 80px; }

/* Two-column hero layout */
.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 56px;
  align-items: center;
}

.hero-text { min-width: 0; }

/* Photo */
.hero-photo-col {
  flex-shrink: 0;
}

.hero-photo-wrap {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--border);
  box-shadow: var(--shadow-md);
  transition: border-color var(--t);
}

.hero-photo-wrap:hover { border-color: var(--accent); }

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

@media (max-width: 720px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-photo-col {
    order: -1;   /* photo above text on mobile */
    display: flex;
    justify-content: center;
  }

  .hero-photo-wrap {
    width: 140px;
    height: 140px;
  }
}

.hero-label {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--accent);
  letter-spacing: .1em;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(.8); }
}

.hero h1 {
  font-family: var(--mono);
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 20px;
}

.hero h1 .cursor {
  display: inline-block;
  width: 3px;
  height: .85em;
  background: var(--accent);
  margin-left: 4px;
  vertical-align: middle;
  border-radius: 1px;
  animation: blink 1.1s ease-in-out infinite;
}

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

.hero-bio {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 540px;
  line-height: 1.75;
  margin-bottom: 36px;
}

/* Social links row */
.hero-social {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  font-size: .82rem;
  font-family: var(--mono);
  color: var(--text-muted);
  background: var(--bg-card);
  transition: all var(--t);
}

.social-link:hover {
  border-color: var(--text-subtle);
  color: var(--text);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.social-link--linkedin:hover {
  border-color: #0a66c2;
  color: #0a66c2;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ============================================================
   App Cards Grid
   ============================================================ */

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  box-shadow: var(--shadow-sm);
}

.app-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.app-card.coming-soon {
  opacity: .55;
  pointer-events: none;
}

/* App icon squares */
.app-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--r);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: .95rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
  letter-spacing: -.04em;
  user-select: none;
}

.icon-vc { background: linear-gradient(135deg, #1a7fff 0%, #0d4eb5 100%); }
.icon-rd { background: linear-gradient(135deg, #f7617a 0%, #c2264a 100%); }
.icon-bl { background: linear-gradient(135deg, #a78bfa 0%, #6d28d9 100%); }
.icon-sd { background: linear-gradient(135deg, #2dd4bf 0%, #0f766e 100%); }
.icon-ht { background: linear-gradient(135deg, #4ade80 0%, #15803d 100%); }
.icon-placeholder { background: var(--border); }

.app-card-body { flex: 1; display: flex; flex-direction: column; gap: 10px; }

.app-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.01em;
}

.app-card-desc {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.app-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-family: var(--mono);
  font-size: .68rem;
  padding: 2px 8px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: var(--r-sm);
  letter-spacing: .02em;
}

.app-card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.coming-badge {
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--text-subtle);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: var(--r);
  display: inline-flex;
  align-items: center;
}

/* ============================================================
   Contact Section
   ============================================================ */

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 36px 40px;
  max-width: 540px;
}

.contact-card p {
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.contact-email-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: .9rem;
  color: var(--accent);
  padding: 10px 18px;
  border: 1px solid var(--accent);
  border-radius: var(--r);
  transition: all var(--t);
}

.contact-email-link svg { width: 15px; height: 15px; flex-shrink: 0; }

.contact-email-link:hover {
  background: var(--accent-sub);
  color: var(--accent-h);
  transform: translateY(-1px);
}

.contact-note {
  display: block;
  margin-top: 14px;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--text-subtle);
}

/* ============================================================
   Footer
   ============================================================ */

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.footer-copy {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--text-subtle);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  list-style: none;
}

.footer-links a {
  font-size: .78rem;
  color: var(--text-subtle);
  transition: color var(--t);
}

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

/* ============================================================
   App Detail Page
   ============================================================ */

.page-hero { padding: 56px 0 48px; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  transition: color var(--t);
}

.back-link svg { width: 14px; height: 14px; }
.back-link:hover { color: var(--accent); }

.app-hero-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.app-hero-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.app-hero-meta { flex: 1; }

.app-hero-name {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 8px;
}

.app-hero-tagline {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 24px;
}

.app-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Content sections on detail page */
.content-sec {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.content-sec h2 {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.02em;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.content-sec h2::before {
  content: '//';
  color: var(--accent);
  opacity: .65;
  font-size: .9em;
}

.content-sec p,
.prose p { color: var(--text-muted); line-height: 1.75; margin-bottom: 14px; }

.content-sec ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.content-sec ul li {
  color: var(--text-muted);
  line-height: 1.65;
  padding-left: 20px;
  position: relative;
}

.content-sec ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .85em;
}

/* Screenshots placeholder grid */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
}

.screenshot-ph {
  aspect-ratio: 9/16;
  background: var(--bg-subtle);
  border: 2px dashed var(--border);
  border-radius: var(--r);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-subtle);
  font-family: var(--mono);
  font-size: .68rem;
  text-align: center;
  padding: 12px;
}

.screenshot-ph svg {
  width: 22px;
  height: 22px;
  opacity: .35;
}

/* ============================================================
   Privacy Policy Page
   ============================================================ */

.policy-wrap { max-width: 740px; padding: 56px 0 80px; }

.policy-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: .72rem;
  padding: 3px 10px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: var(--r);
  margin-bottom: 16px;
}

.policy-title {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -.025em;
  color: var(--text);
  margin-bottom: 12px;
}

.policy-meta {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--text-subtle);
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.policy-sec { margin-bottom: 36px; }

.policy-sec h2 {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-sub);
}

.policy-sec h3 {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-muted);
  margin: 16px 0 8px;
}

.policy-sec p,
.policy-sec li {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 10px;
}

.policy-sec ul { padding-left: 24px; margin-bottom: 12px; }

.policy-sec a { color: var(--accent); }
.policy-sec a:hover { text-decoration: underline; }

.policy-highlight {
  background: var(--accent-sub);
  border-left: 3px solid var(--accent);
  padding: 14px 18px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  margin: 16px 0;
}

.policy-highlight p { margin: 0; font-size: .875rem; color: var(--text); }

/* ============================================================
   Utilities
   ============================================================ */

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 768px) {
  .hero { padding: 64px 0 56px; }
  .section { padding: 56px 0; }

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

  .app-hero-row { flex-direction: column; gap: 16px; }

  .contact-card { padding: 24px; }

  .screenshots-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .wrap { padding: 0 16px; }

  .screenshots-grid { grid-template-columns: repeat(2, 1fr); }

  .policy-meta { flex-direction: column; gap: 6px; }
}

/* ============================================================
   Award Highlight Card
   ============================================================ */

.award-card {
  background: #fffbeb;
  border: 1.5px solid #f59e0b;
  border-radius: var(--r-lg);
  padding: 28px 32px;
  margin-bottom: 32px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: start;
}

[data-theme="dark"] .award-card {
  background: #1d1700;
  border-color: #92400e;
}

.award-meta { flex: 1; }

.award-eyebrow {
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: #b45309;
  text-transform: uppercase;
  margin-bottom: 6px;
}

[data-theme="dark"] .award-eyebrow { color: #fbbf24; }

.award-name {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: #92400e;
  letter-spacing: -.02em;
  line-height: 1.3;
  margin-bottom: 6px;
}

[data-theme="dark"] .award-name { color: #fcd34d; }

.award-paper-title {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 10px;
}

.award-details {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--text-subtle);
  line-height: 1.7;
}

.award-details strong {
  color: var(--text-muted);
  font-weight: 600;
}

/* Certificate thumbnail */
.cert-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.cert-thumb {
  width: 110px;
  border-radius: var(--r);
  border: 1px solid var(--border);
  display: block;
  cursor: zoom-in;
  transition: transform var(--t), box-shadow var(--t);
  flex-shrink: 0;
}

.cert-thumb:hover {
  transform: scale(1.04);
  box-shadow: var(--shadow-md);
}

.cert-caption {
  font-family: var(--mono);
  font-size: .62rem;
  color: var(--text-subtle);
  text-align: center;
  line-height: 1.4;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(0,0,0,.88);
  align-items: center;
  justify-content: center;
  padding: 24px;
  cursor: zoom-out;
}

.lightbox.open { display: flex; }

.lightbox-img {
  max-width: min(90vw, 700px);
  max-height: 90vh;
  border-radius: var(--r);
  box-shadow: 0 16px 64px rgba(0,0,0,.6);
  cursor: default;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.25);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--t);
  line-height: 1;
}

.lightbox-close:hover { background: rgba(255,255,255,.2); }

/* ============================================================
   Research Paper List
   ============================================================ */

.research-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.paper-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  align-items: start;
  transition: border-color var(--t);
}

.paper-item:hover { border-color: var(--accent); }

.paper-num {
  font-family: var(--mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent);
  padding-top: 3px;
}

.paper-title {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 5px;
}

.paper-authors {
  font-size: .8rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 10px;
  line-height: 1.5;
}

.paper-authors strong {
  font-style: normal;
  color: var(--text);
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
}

/* Status badges */
.sbadge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: .67rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: var(--r-sm);
  letter-spacing: .03em;
  white-space: nowrap;
}

.sbadge-award {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #f59e0b;
}

[data-theme="dark"] .sbadge-award {
  background: #2d1e00;
  color: #fcd34d;
  border-color: #92400e;
}

.sbadge-ongoing {
  background: var(--accent-sub);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.sbadge-review {
  background: transparent;
  color: var(--text-subtle);
  border: 1px solid var(--border);
}

/* Research interests block */
.interests-block {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px 24px;
  margin-top: 12px;
}

.interests-label {
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--text-subtle);
  letter-spacing: .08em;
  margin-bottom: 12px;
  display: block;
}

.interests-label::before { content: '// '; opacity: .6; }

.interests-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.itag {
  font-family: var(--mono);
  font-size: .75rem;
  padding: 4px 12px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: var(--r);
}

/* Grad school note */
.grad-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--accent-sub);
  border: 1px solid var(--accent);
  border-radius: var(--r);
  padding: 12px 16px;
  margin-top: 10px;
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.grad-note strong { color: var(--text); }

/* ============================================================
   Experience Section
   ============================================================ */

.exp-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.exp-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  transition: border-color var(--t);
}

.exp-item:hover { border-color: var(--accent); }

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 3px;
  flex-wrap: wrap;
}

.exp-role {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.01em;
}

.exp-dates {
  font-family: var(--mono);
  font-size: .73rem;
  color: var(--text-subtle);
  white-space: nowrap;
  padding-top: 2px;
}

.exp-company {
  font-size: .85rem;
  color: var(--accent);
  margin-bottom: 14px;
}

.exp-select-note {
  background: var(--accent-sub);
  border-left: 3px solid var(--accent);
  padding: 9px 14px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}

.exp-bullets {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.exp-bullets li {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.65;
  padding-left: 20px;
  position: relative;
}

.exp-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .82em;
  top: 1px;
}

.exp-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--accent);
  margin-top: 10px;
  transition: color var(--t);
}

.exp-link:hover { color: var(--accent-h); text-decoration: underline; }

/* ============================================================
   Responsive additions
   ============================================================ */

@media (max-width: 600px) {
  .award-card {
    grid-template-columns: 1fr;
  }

  .cert-col {
    flex-direction: row;
    align-items: center;
    gap: 14px;
  }

  .cert-thumb { width: 80px; }

  .exp-header { flex-direction: column; gap: 4px; }

  .paper-item { grid-template-columns: 1fr; }
  .paper-num { display: none; }
}