@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Playfair+Display:wght@600;700&display=swap');
:root{--ink:#132238;--muted:#5e6b7b;--paper:#fbfaf7;--white:#fff;--line:#dfe4ea;--accent:#0b5cad;--accent2:#e8f1fb;--max:1120px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',Arial,sans-serif;line-height:1.7}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{width:min(92%,var(--max));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(251,250,247,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between}.brand{font-weight:700;color:var(--ink)}.nav-links{display:flex;gap:22px}.nav-links a{font-size:.92rem;color:var(--ink)}.menu-toggle{display:none;border:0;background:none;font-size:1.5rem}.hero{padding:54px 0 58px;background:linear-gradient(135deg,#f5f8fc,#fbfaf7)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.32fr) minmax(300px,.62fr);gap:58px;align-items:center;min-height:500px}.eyebrow{font-size:.75rem;font-weight:700;letter-spacing:.16em;color:var(--accent);margin:0 0 12px}h1,h2,h3{line-height:1.15}h1,h2{font-family:'Playfair Display',Georgia,serif}h1{font-size:clamp(2.7rem,4.1vw,4.05rem);line-height:1.04;margin:0 0 16px;letter-spacing:-.025em;white-space:nowrap}h2{font-size:clamp(2rem,4vw,3rem);margin:0 0 28px}h3{font-size:1.2rem;margin-top:0}.hero-role{font-size:1.18rem;font-weight:600;margin:0 0 5px;color:var(--ink)}.institution{font-size:1rem;font-weight:500;margin:0 0 20px;color:var(--accent)}.lead{font-size:1.05rem;color:var(--muted);max-width:620px;margin:0}.hero-actions,.contact-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-block;padding:12px 20px;border:1px solid var(--accent);border-radius:8px;font-weight:600}.btn.primary{background:var(--accent);color:white}.btn.secondary{background:transparent;color:var(--accent)}.profile-card{background:white;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 12px 35px rgba(19,34,56,.07);max-width:390px;width:100%;justify-self:end}.profile-photo{width:100%;height:390px;object-fit:cover;object-position:center 30%;border-radius:12px;display:block}.profile-links{display:flex;flex-wrap:wrap;gap:8px 14px;margin-top:15px}.section{padding:90px 0}.alt{background:#f1f4f7}.two-col{display:grid;grid-template-columns:1.3fr .7fr;gap:60px}.facts{border-left:2px solid var(--line);padding-left:28px}.facts div{margin-bottom:22px}.facts span{display:block;color:var(--muted);font-size:.85rem}.facts strong{display:block}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:white;border:1px solid var(--line);border-radius:14px;padding:26px}.card p{color:var(--muted)}.research-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.research-grid span{background:white;border:1px solid var(--line);border-radius:10px;padding:18px;font-weight:600}.publication-list{display:grid;gap:0}.publication{display:grid;grid-template-columns:80px 1fr;gap:24px;padding:25px 0;border-top:1px solid var(--line)}.publication .year{font-weight:700;color:var(--accent)}.publication h3{margin-bottom:8px}.publication p{color:var(--muted);margin:0 0 8px}.note{color:var(--muted);font-size:.92rem}.resource-list{display:grid;gap:12px}.resource-list a{display:flex;justify-content:space-between;gap:20px;background:white;border:1px solid var(--line);border-radius:10px;padding:18px 20px;color:var(--ink)}.resource-list span{color:var(--muted)}.contact{background:var(--ink);color:white}.contact .eyebrow{color:#9cc7f7}.contact p{max-width:720px;color:#d7e0ea}.contact .btn.secondary{color:white;border-color:white}footer{border-top:1px solid var(--line)}.footer{padding:22px 0;display:flex;justify-content:space-between;color:var(--muted);font-size:.85rem}@media(max-width:800px){.hero-grid{min-height:auto}.profile-card{justify-self:start;max-width:420px}.hero{padding-top:58px}.nav-links{display:none;position:absolute;left:0;right:0;top:72px;background:var(--paper);padding:18px 4%;flex-direction:column;border-bottom:1px solid var(--line)}.nav-links.open{display:flex}.menu-toggle{display:block}.hero{padding-top:65px}.hero-grid,.two-col{grid-template-columns:1fr}.cards{grid-template-columns:1fr}.research-grid{grid-template-columns:1fr}.facts{border-left:0;border-top:2px solid var(--line);padding:24px 0 0}.publication{grid-template-columns:60px 1fr}.resource-list a{flex-direction:column;gap:2px}.footer{flex-direction:column;gap:5px}}

.profile-caption{padding:17px 4px 4px}.profile-caption strong{display:block;font-size:1.05rem}.profile-caption span{display:block;color:var(--muted);font-size:.9rem;margin-top:3px}.hero-highlights{display:flex;gap:20px;flex-wrap:wrap;margin-top:28px;padding-top:18px;border-top:1px solid var(--line)}.hero-highlights span{font-size:.82rem;font-weight:700;color:var(--muted)}.hero-highlights span:not(:last-child)::after{content:"•";margin-left:20px;color:var(--accent)}

.hero-location{font-size:.88rem;color:var(--muted);margin:-1px 0 20px}
.focus-strip{display:flex;gap:10px;flex-wrap:wrap;margin:25px 0 0}
.focus-strip span{border:1px solid var(--line);background:rgba(255,255,255,.72);padding:7px 12px;border-radius:999px;font-size:.78rem;font-weight:700;color:var(--ink)}
.profile-card{max-width:360px;padding:16px}
.profile-photo{height:370px}
.profile-caption{padding:15px 3px 3px}
.profile-caption strong{font-size:1rem}
.profile-caption span{margin-top:2px}
.hero-actions{margin-top:25px}
@media(max-width:800px){
  h1{white-space:normal;font-size:clamp(2.7rem,11vw,4rem)}
  .hero{padding:48px 0 54px}
  .hero-grid{min-height:auto;gap:42px}
  .profile-card{max-width:420px}
}

.about-intro{max-width:900px}
.about-intro p{margin:0 0 18px}
.about-lead{font-size:1.2rem;line-height:1.75;color:var(--ink)}
.about-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:38px}
.about-block{border:1px solid var(--line);border-radius:18px;padding:24px;background:rgba(255,255,255,.6)}
.about-block h3{margin:0 0 16px;font-size:1.08rem}
.tag-list{display:flex;flex-wrap:wrap;gap:9px}
.tag-list span{padding:8px 11px;border:1px solid var(--line);border-radius:999px;font-size:.82rem;font-weight:600;background:#fff}
.timeline{display:grid;gap:17px}
.timeline div{display:grid;gap:4px}
.timeline strong{font-size:.94rem}
.timeline span{font-size:.86rem;color:var(--muted)}
.clean-list{margin:0;padding-left:19px}
.clean-list li{margin:0 0 10px;color:var(--muted)}
.section-lead{max-width:720px;color:var(--muted);font-size:1.05rem}
@media(max-width:800px){
  .about-grid{grid-template-columns:1fr}
  .about-lead{font-size:1.08rem}
}

.research-themes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:34px}
.research-card{border:1px solid var(--line);border-radius:18px;padding:24px;background:#fff;position:relative;min-height:185px}
.research-number{font-size:.75rem;font-weight:800;color:var(--accent);letter-spacing:.08em}
.research-card h3{font-size:1.05rem;margin:28px 0 9px}.research-card p{font-size:.9rem;color:var(--muted);margin:0;line-height:1.65}
.research-feature{display:grid;grid-template-columns:1.3fr .9fr;gap:30px;margin-top:32px;padding:30px;border-radius:20px;background:var(--ink);color:#fff}
.research-feature .eyebrow{color:#b9c9dc}.research-feature h3{font-size:1.55rem;margin:8px 0 12px}.research-feature p{color:#d5dde6;margin:0;line-height:1.7}
.research-stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.research-stat-grid div{border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:18px}
.research-stat-grid strong{display:block;font-size:1.55rem}.research-stat-grid span{display:block;color:#c5cfda;font-size:.8rem;margin-top:3px}
.research-columns{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:24px}
.research-list-card{border:1px solid var(--line);border-radius:18px;padding:24px;background:#fff}.research-list-card h3{margin:0 0 14px}
.research-list{list-style:none;padding:0;margin:0}.research-list li{padding:14px 0;border-top:1px solid var(--line)}
.research-list li:first-child{border-top:0;padding-top:0}.research-list strong{display:block;font-size:.9rem;line-height:1.45}
.research-list span{display:block;font-size:.78rem;color:var(--muted);margin-top:4px}
@media(max-width:900px){.research-themes{grid-template-columns:1fr 1fr}.research-feature{grid-template-columns:1fr}.research-columns{grid-template-columns:1fr}}
@media(max-width:600px){.research-themes{grid-template-columns:1fr}}

.publication-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:28px 0 42px}
.publication-summary div{border:1px solid var(--line);background:#fff;border-radius:16px;padding:18px;text-align:center}
.publication-summary strong{display:block;font-size:1.6rem}.publication-summary span{display:block;color:var(--muted);font-size:.78rem;margin-top:4px}
.pub-group{margin-top:42px}.pub-group-head{margin-bottom:18px}.pub-group-head h3{margin:3px 0 0;font-size:1.45rem}
.publication-list{display:grid;gap:10px}.publication{display:grid;grid-template-columns:68px 1fr;gap:18px;padding:20px;border:1px solid var(--line);border-radius:14px;background:#fff}
.publication .year{font-size:.85rem;font-weight:800;color:var(--accent);padding-top:2px}
.publication h3{font-size:.98rem;line-height:1.45;margin:0 0 7px}.publication p{font-size:.83rem;color:var(--muted);margin:0 0 9px;line-height:1.55}
.publication a,.book-list a{font-size:.78rem;font-weight:700;color:var(--accent);text-decoration:none;margin-right:10px}
.publication-list.compact .publication{padding:16px}.publication-list.compact{gap:8px}
.pub-two-col{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:42px}
.book-list{display:grid;gap:12px}.book-list article{padding:20px;border:1px solid var(--line);border-radius:14px;background:#fff}
.book-list h4{margin:0 0 7px;font-size:.96rem;line-height:1.45}.book-list p{margin:0 0 9px;color:var(--muted);font-size:.82rem;line-height:1.5}
.source-note{margin-top:28px;color:var(--muted);font-size:.76rem}
@media(max-width:800px){.publication-summary{grid-template-columns:1fr 1fr}.pub-two-col{grid-template-columns:1fr}}
@media(max-width:600px){.publication{grid-template-columns:1fr;gap:7px}}
.teaching-feature{display:grid;grid-template-columns:1.35fr .65fr;gap:30px;margin-top:32px;padding:30px;border:1px solid var(--line);border-radius:20px;background:#fff}.teaching-feature h3{font-size:1.5rem;margin:7px 0 12px}.teaching-feature p{color:var(--muted);line-height:1.7}.mentoring-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-content:center}.mentoring-stats div{padding:20px;border-radius:14px;background:var(--ink);color:#fff}.mentoring-stats strong{display:block;font-size:1.75rem}.mentoring-stats span{display:block;font-size:.78rem;color:#c9d3de;margin-top:4px}.teaching-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:24px}.teaching-card{padding:23px;border:1px solid var(--line);border-radius:18px;background:#fff}.teaching-card h3{font-size:1.02rem;margin:0 0 13px}.teaching-card ul{margin:0;padding-left:18px}.teaching-card li{font-size:.86rem;color:var(--muted);margin-bottom:8px}.teaching-resources-preview{display:flex;justify-content:space-between;gap:30px;align-items:center;margin-top:26px;padding:28px;border-radius:18px;background:linear-gradient(135deg,#f5f8fc,#fbfaf7);border:1px solid var(--line)}.teaching-resources-preview p{max-width:720px;color:var(--muted);margin:0}@media(max-width:900px){.teaching-feature{grid-template-columns:1fr}.teaching-grid{grid-template-columns:1fr 1fr}}@media(max-width:650px){.teaching-grid{grid-template-columns:1fr}.teaching-resources-preview{align-items:flex-start;flex-direction:column}}
/* Version 17: consistent Academic Profile typography */
.about-intro p,
.about-intro .about-lead {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
  font-weight: 400;
}

.about-intro strong {
  color: var(--ink);
  font-weight: 700;
}

@media (max-width: 800px) {
  .about-intro p,
  .about-intro .about-lead {
    font-size: 1rem;
  }
}

/* Version 19: Lecture Materials & Downloads */
.resource-course-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  margin-top:32px;
}
.resource-course-card{
  display:flex;
  flex-direction:column;
  min-height:230px;
  padding:24px;
  border:1px solid var(--line);
  border-radius:18px;
  background:#fff;
}
.resource-code{
  font-size:.74rem;
  font-weight:800;
  letter-spacing:.08em;
  color:var(--accent);
}
.resource-course-card h3{
  margin:25px 0 10px;
  font-size:1.05rem;
  line-height:1.4;
}
.resource-course-card p{
  margin:0 0 20px;
  color:var(--muted);
  font-size:.87rem;
  line-height:1.6;
}
.resource-status{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:.76rem;
  font-weight:600;
}
.resource-note{
  display:flex;
  gap:12px;
  align-items:baseline;
  margin-top:24px;
  padding:18px 20px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#f8fafc;
}
.resource-note strong{white-space:nowrap}
.resource-note span{color:var(--muted);font-size:.84rem}
@media(max-width:900px){
  .resource-course-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .resource-course-grid{grid-template-columns:1fr}
  .resource-note{display:block}
  .resource-note span{display:block;margin-top:6px}
}

/* Version 20 — compact section spacing */
.section{padding-top:64px;padding-bottom:64px}
.section + .section{margin-top:0}
.section .eyebrow{margin-bottom:8px}
.section h2{margin-top:0;margin-bottom:18px}
.section-lead{margin-top:0;margin-bottom:26px}
.about-grid,.research-themes,.teaching-feature,.resource-course-grid{margin-top:26px}
.research-feature{margin-top:26px}
.research-columns,.teaching-grid{margin-top:20px}
.pub-group{margin-top:34px}
.pub-two-col{margin-top:34px}
.teaching-resources-preview,.resource-note{margin-top:22px}
@media(max-width:800px){.section{padding-top:48px;padding-bottom:48px}}
@media(max-width:600px){.section{padding-top:40px;padding-bottom:40px}}

/* Version 21 — contact phone links */
.contact-numbers{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.contact-numbers a{display:flex;flex-direction:column;gap:3px;min-width:190px;padding:14px 18px;border:1px solid var(--line);border-radius:14px;background:#fff;text-decoration:none;color:var(--ink)}
.contact-numbers a:hover{transform:translateY(-1px)}
.contact-numbers strong{font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.contact-numbers span{font-size:.95rem;font-weight:700}
.software-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:28px}.software-card{padding:28px;border:1px solid var(--line);border-radius:20px;background:#fff}.software-top{display:flex;justify-content:space-between;gap:15px;align-items:center;color:var(--muted);font-size:.75rem}.software-badge{font-weight:800;letter-spacing:.07em;color:var(--accent)}.software-card h3{font-size:1.65rem;margin:24px 0 3px}.software-fullname{font-weight:700;font-size:.88rem;color:var(--ink)!important;margin:0 0 15px!important}.software-card p{color:var(--muted);font-size:.88rem;line-height:1.65}.software-tags{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0 22px}.software-tags span{padding:6px 9px;border:1px solid var(--line);border-radius:999px;font-size:.72rem;font-weight:600}.software-card .btn{display:inline-block}@media(max-width:750px){.software-grid{grid-template-columns:1fr}.software-top{align-items:flex-start;flex-direction:column;gap:5px}}
/* Version 24 — consolidated Projects & Software section */
.project-subheading{margin:38px 0 18px;font-size:1.25rem}
.software-actions{margin-top:22px}
.featured-software{display:flex;flex-direction:column}
.featured-software .software-actions{margin-top:auto;padding-top:8px}

/* Version 25 — Contact & Academic Profiles */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:22px;margin-top:30px}
.contact-card{padding:28px;border:1px solid var(--line);border-radius:20px;background:#fff}
.contact-card h3{margin:7px 0 14px;font-size:1.35rem}
.contact-card p{color:var(--muted);line-height:1.7}
.contact-primary{background:linear-gradient(135deg,#f8fbff,#fff)}
.contact-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}
.contact-actions a{display:flex;flex-direction:column;gap:4px;padding:15px;border:1px solid var(--line);border-radius:14px;text-decoration:none;color:var(--ink);background:#fff}
.contact-actions strong{font-size:.76rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.contact-actions span{font-size:.94rem;font-weight:700}
.profile-link-list{display:grid}
.profile-link-list a{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:14px 0;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}
.profile-link-list a:first-child{border-top:0}
.profile-link-list span{font-weight:700}
.profile-link-list strong{font-size:.78rem;color:var(--accent)}
.contact-note{display:flex;gap:18px;align-items:baseline;margin-top:22px;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:#f8fafc}
.contact-note strong{white-space:nowrap}
.contact-note span{color:var(--muted);font-size:.84rem}
@media(max-width:800px){.contact-grid{grid-template-columns:1fr}}
@media(max-width:600px){.contact-actions{grid-template-columns:1fr}.profile-link-list a{align-items:flex-start;flex-direction:column;gap:3px}.contact-note{display:block}.contact-note span{display:block;margin-top:6px}}

/* Version 26 — mentoring statistics */
.mentoring-stats{grid-template-columns:repeat(3,1fr)}
@media(max-width:650px){.mentoring-stats{grid-template-columns:1fr}}

/* Version 27 — professional contact emails */
.contact-actions span{overflow-wrap:anywhere}

/* Version 28 — Incompressible Aerodynamics resource library */
.resource-course-active{border-color:rgba(0,94,184,.35);box-shadow:0 10px 28px rgba(15,35,65,.06)}
.resource-status.available{color:var(--accent);background:#eef6ff;border-color:#cfe4fb}
.resource-open{display:inline-block;margin-top:14px;font-weight:800;color:var(--accent);text-decoration:none}
.course-hero h1{font-family:Georgia,'Times New Roman',serif;color:var(--ink);font-size:clamp(2.5rem,6vw,4.8rem);line-height:1.02;margin:8px 0 20px}
.material-groups{display:grid;gap:24px}
.material-group{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px}
.material-group h2{font-size:1.18rem;margin:0 0 14px}
.material-list{display:grid}
.material-row{display:flex;justify-content:space-between;align-items:center;gap:22px;padding:15px 0;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}
.material-row:first-child{border-top:0}
.material-row span{display:flex;flex-direction:column;gap:3px}
.material-row small{color:var(--muted);font-size:.76rem}
.material-row b{color:var(--accent);font-size:.78rem;white-space:nowrap}
.material-row:hover strong{color:var(--accent)}
@media(max-width:650px){.material-row{align-items:flex-start;flex-direction:column;gap:7px}}

/* Version 29 — Aircraft Performance resource page */
.resource-course-active{border-color:rgba(0,94,184,.35);box-shadow:0 10px 28px rgba(15,35,65,.06)}
.resource-status.available{color:var(--accent);background:#eef6ff;border-color:#cfe4fb}
.resource-open{display:inline-block;margin-top:14px;font-weight:800;color:var(--accent);text-decoration:none}
.course-hero h1{font-family:Georgia,'Times New Roman',serif;color:var(--ink);font-size:clamp(2.5rem,6vw,4.8rem);line-height:1.02;margin:8px 0 20px}
.material-groups{display:grid;gap:24px}
.material-group{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px}
.material-group h2{font-size:1.18rem;margin:0 0 14px}
.material-list{display:grid}
.material-row{display:flex;justify-content:space-between;align-items:center;gap:22px;padding:15px 0;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}
.material-row:first-child{border-top:0}
.material-row span{display:flex;flex-direction:column;gap:3px}
.material-row small{color:var(--muted);font-size:.76rem}
.material-row b{color:var(--accent);font-size:.78rem;white-space:nowrap}
.material-row:hover strong{color:var(--accent)}
@media(max-width:650px){.material-row{align-items:flex-start;flex-direction:column;gap:7px}}

/* Version 30 — lightweight Google Drive resource hosting */
.drive-course-btn{margin-left:10px}
@media(max-width:600px){.drive-course-btn{margin-left:0;margin-top:10px}}