/* =============================================================================
   ABDALLAH ALSAMMANI — ACADEMIC WEBSITE · style.css · v7.0 (September 2026)
   One stylesheet for every page. Tokens in §1 control the whole site.
   §1 tokens · §2 base · §3 layout · §4 header/nav · §5 buttons/links · §6 hero
   §7 home sections · §8 research · §9 publications · §10 group · §11 teaching
   §12 cv · §13 contact · §14 footer · §15 motion · §16 responsive
   ============================================================================= */

/* §1 TOKENS ------------------------------------------------------------------ */
:root {
  --primary-blue:       #294766;
  --primary-blue-light: #315574;
  --primary-blue-deep:  #1F3750;
  --accent:             #2E7D86;   /* muted teal */
  --accent-soft:        #E4EFF0;
  --accent-burgundy:    var(--accent);      /* legacy alias */
  --text-primary:       #1F2933;
  --text-secondary:     #4B5866;
  --text-muted:         #5F6C7A;
  --background:         #FFFFFF;
  --background-off:     #F8F9FB;
  --surface:            #F1F4F8;
  --border:             #D9DFE7;
  --border-subtle:      #E7EBF0;
  --link:               #294766;

  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-sans:  'Source Sans 3', 'Segoe UI', Helvetica, Arial, sans-serif;

  --fs-body: 1.0625rem;   /* 17px */
  --fs-sm:   0.9375rem;   /* 15px */
  --fs-xs:   0.8125rem;   /* 13px */
  --fs-h3:   1.375rem;    /* 22px */
  --fs-h2:   2.125rem;    /* 34px */
  --fs-h1:   2.75rem;     /* 44px */
  --fs-hero: 3.25rem;     /* 52px */
  --lh: 1.6;

  --s1: .25rem; --s2: .5rem; --s3: .75rem; --s4: 1rem; --s5: 1.5rem;
  --s6: 2rem; --s7: 3rem; --s8: 4rem; --s9: 5.5rem;

  --container: 1080px;
  --measure: 68ch;
  --radius: 4px;
  --header-h: 64px;
  --t: 160ms ease;
}

/* §2 BASE -------------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);font-size:var(--fs-body);line-height:var(--lh);color:var(--text-primary);background:var(--background);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{display:block;max-width:100%}
img{height:auto}
a{color:var(--link);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.16em;text-decoration-color:rgba(41,71,102,.35);transition:color var(--t),text-decoration-color var(--t)}
a:hover{color:var(--accent-burgundy);text-decoration-color:currentColor}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;line-height:1.2;color:var(--text-primary);letter-spacing:-.005em}
h1{font-size:clamp(2rem,4vw,var(--fs-h1))}
h2{font-size:clamp(1.6rem,3vw,var(--fs-h2))}
h3{font-size:var(--fs-h3)}
h4{font-family:var(--font-sans);font-size:var(--fs-body);font-weight:600}
p{max-width:var(--measure)}
p+p{margin-top:var(--s4)}
strong{font-weight:600}
.muted{color:var(--text-muted)}
.small{font-size:var(--fs-sm)}
.serif{font-family:var(--font-serif)}
:focus-visible{outline:2px solid var(--accent-burgundy);outline-offset:3px;border-radius:2px}
.skip-link{position:absolute;left:var(--s4);top:-100px;background:var(--primary-blue);color:#fff;padding:var(--s2) var(--s4);border-radius:var(--radius);z-index:1000;font-weight:600;text-decoration:none}
.skip-link:focus{top:var(--s4)}
.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}

/* §3 LAYOUT ------------------------------------------------------------------ */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--s5)}
.container--narrow{max-width:820px}
.section{padding-block:var(--s8)}
.section--first{padding-top:var(--s7)}
.section--off{background:var(--background-off);border-top:1px solid var(--border-subtle);border-bottom:1px solid var(--border-subtle)}
.section-head{margin-bottom:var(--s6);max-width:720px}
.section-head h2{margin-bottom:var(--s3)}
.section-head p{color:var(--text-secondary);font-size:1.0625rem}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--s5);max-width:none}
.section-head--row>div{max-width:720px}
.rule{border:0;border-top:1px solid var(--border);margin:var(--s7) 0}
.grid{display:grid;gap:var(--s6)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.prose>*+*{margin-top:var(--s4)}
.prose ul,.prose ol{padding-left:1.25em;max-width:var(--measure)}
.prose li+li{margin-top:var(--s2)}
.kicker{display:block;font-size:var(--fs-sm);font-weight:600;color:var(--accent-burgundy);letter-spacing:.01em;margin-bottom:var(--s2)}
.tags{display:flex;flex-wrap:wrap;gap:.4rem}
.tag{display:inline-block;font-size:var(--fs-xs);color:var(--text-secondary);padding:.15rem .55rem;border:1px solid var(--border);border-radius:999px;background:#fff}
.label{display:inline-block;font-size:var(--fs-xs);font-weight:600;color:var(--text-muted)}
.label--preprint{color:var(--accent-burgundy)}
.on-page{display:flex;flex-wrap:wrap;gap:var(--s2) var(--s5);margin-top:var(--s5);font-size:var(--fs-sm)}
.on-page a{text-decoration:none;font-weight:600;color:var(--text-secondary)}
.on-page a:hover{color:var(--accent-burgundy)}

/* §4 HEADER & NAV ------------------------------------------------------------ */
.site-header{position:sticky;top:0;z-index:100;height:var(--header-h);background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--border-subtle)}
.site-header .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--s5)}
.brand{font-family:var(--font-serif);font-size:1.2rem;font-weight:600;color:var(--primary-blue);text-decoration:none;white-space:nowrap}
.brand:hover{color:var(--primary-blue);text-decoration:none}
.nav{display:flex;gap:var(--s1);list-style:none}
.nav a{display:inline-block;padding:.4rem .7rem;font-size:var(--fs-sm);font-weight:500;color:var(--text-secondary);text-decoration:none;border-bottom:2px solid transparent;transition:color var(--t),border-color var(--t)}
.nav a:hover{color:var(--primary-blue)}
.nav a[aria-current=page]{color:var(--primary-blue);font-weight:600;border-bottom-color:var(--accent-burgundy)}
.nav-toggle{display:none;background:none;border:1px solid var(--border);border-radius:var(--radius);width:42px;height:38px;cursor:pointer;align-items:center;justify-content:center;color:var(--primary-blue)}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative;transition:transform var(--t)}
.nav-toggle span::before,.nav-toggle span::after{content:'';position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform var(--t)}
.nav-toggle span::before{top:-6px}.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded=true] span{background:transparent}
.nav-toggle[aria-expanded=true] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded=true] span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-nav{display:block;position:sticky;top:var(--header-h);z-index:99;background:#fff;border-bottom:1px solid var(--border);padding:var(--s2) var(--s5) var(--s4)}
.mobile-nav[hidden]{display:none}
.mobile-nav a{display:block;padding:.65rem 0;text-decoration:none;color:var(--text-primary);font-weight:500;border-bottom:1px solid var(--border-subtle)}
.mobile-nav a[aria-current=page]{color:var(--accent-burgundy);font-weight:600}

/* §5 BUTTONS & ICON LINKS ---------------------------------------------------- */
.btn{display:inline-flex;align-items:center;gap:.45rem;padding:.65rem 1.15rem;font-family:var(--font-sans);font-size:var(--fs-sm);font-weight:600;line-height:1.2;border-radius:var(--radius);border:1.5px solid var(--primary-blue);text-decoration:none;cursor:pointer;transition:background var(--t),color var(--t),border-color var(--t)}
.btn svg{width:14px;height:14px}
.btn--primary{background:var(--primary-blue);color:#fff}
.btn--primary:hover{background:var(--primary-blue-deep);border-color:var(--primary-blue-deep);color:#fff}
.btn--outline{background:transparent;color:var(--primary-blue)}
.btn--outline:hover{background:var(--surface);color:var(--primary-blue)}
.btn--on-dark{background:#fff;color:var(--primary-blue);border-color:#fff}
.btn--on-dark:hover{background:var(--surface);color:var(--primary-blue-deep)}
.btn--on-dark-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn--on-dark-outline:hover{border-color:#fff;color:#fff}
.btn-row{display:flex;flex-wrap:wrap;gap:var(--s3)}
.link-arrow{font-weight:600;font-size:var(--fs-sm);text-decoration:none;display:inline-flex;align-items:center;gap:.3rem}
.link-arrow svg{width:13px;height:13px;transition:transform var(--t)}
.link-arrow:hover svg{transform:translateX(3px)}
.icon-links{display:flex;flex-wrap:wrap;gap:var(--s2);align-items:center}
.icon-links a{display:inline-flex;align-items:center;gap:.35rem;font-size:var(--fs-sm);color:var(--text-secondary);text-decoration:none;padding:.3rem .55rem;border:1px solid var(--border);border-radius:var(--radius);transition:color var(--t),border-color var(--t)}
.icon-links a:hover{color:var(--primary-blue);border-color:var(--primary-blue)}
.icon-links svg{width:15px;height:15px}

/* §6 HERO -------------------------------------------------------------------- */
.hero{background:var(--background-off) linear-gradient(to right,rgba(41,71,102,.045) 1px,transparent 1px) 0 0/48px 48px,linear-gradient(to bottom,rgba(41,71,102,.045) 1px,transparent 1px) 0 0/48px 48px;background-color:var(--background-off);border-bottom:1px solid var(--border-subtle)}
.hero .container{max-width:1180px}

.hero__grid {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr) 290px;
    gap: var(--s6) var(--s7);
    align-items: center;
    padding-block: var(--s7);
}

.hero__portrait {
    width: 260px;
    height: 260px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid #ffffff;
    box-shadow:
        0 0 0 1px var(--border),
        0 0 0 8px var(--accent-soft);
    justify-self: center;
    flex-shrink: 0;
}

.hero__portrait img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 35%;
    display: block;
}
.hero__kicker{font-size:var(--fs-sm);font-weight:600;color:var(--accent);margin-bottom:var(--s2)}
.hero__name{font-size:clamp(1.85rem,2.9vw,2.45rem);white-space:nowrap;margin-bottom:var(--s2);letter-spacing:-.01em}
.hero__role{font-size:1.0625rem;color:var(--text-secondary)}
.hero__inst{font-size:1rem;color:var(--text-muted);margin-bottom:var(--s4)}
.hero__identity{font-family:var(--font-serif);font-size:1.2rem;font-weight:600;color:var(--primary-blue);margin-bottom:var(--s3);line-height:1.3}
.hero__statement{color:var(--text-secondary);max-width:60ch;margin-bottom:var(--s5)}
.hero .btn-row{margin-bottom:var(--s5)}
.hero__visual svg{width:100%;height:auto}

/* §7 HOME SECTIONS ----------------------------------------------------------- */
.progression{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s3) var(--s4);margin:var(--s6) 0;font-family:var(--font-serif);font-size:1.15rem;color:var(--primary-blue)}
.progression span{white-space:nowrap}
.progression svg{width:20px;height:20px;color:var(--accent-burgundy);flex-shrink:0}
.themes{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s6)}
.theme{border-top:2px solid var(--primary-blue);padding-top:var(--s4)}
.theme h3{font-size:1.2rem;margin-bottom:var(--s2)}
.theme p{font-size:var(--fs-sm);color:var(--text-secondary)}
.theme ul{list-style:none;margin-top:var(--s3);font-size:var(--fs-xs);color:var(--text-muted)}
.theme li{padding:.15rem 0}
.domains{display:flex;flex-wrap:wrap;gap:var(--s3);margin-top:var(--s6)}
.domains span{font-size:var(--fs-sm);color:var(--text-secondary);padding:.35rem .8rem;border:1px solid var(--border);border-radius:999px;background:#fff}

.featured{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s7) var(--s6)}
.project__figure{background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius);aspect-ratio:3/2;overflow:hidden;margin-bottom:var(--s4)}
.project__figure svg,.project__figure img{width:100%;height:100%;object-fit:cover}
.project h3{font-size:1.2rem;margin-bottom:var(--s2)}
.project p{font-size:var(--fs-sm);color:var(--text-secondary);margin-bottom:var(--s3)}
.project .tags{margin-bottom:var(--s3)}
.project__links{display:flex;gap:var(--s4);font-size:var(--fs-sm);font-weight:600}
.project__links a{text-decoration:none}

.news{list-style:none;border-top:1px solid var(--border)}
.news li{display:grid;grid-template-columns:72px minmax(0,1fr);gap:var(--s4);padding:var(--s4) 0;border-bottom:1px solid var(--border-subtle)}
.news__date{font-size:var(--fs-sm);font-weight:600;color:var(--text-muted)}
.news__title{font-weight:600}
.news__title a{text-decoration:none}
.news__text{font-size:var(--fs-sm);color:var(--text-secondary);max-width:none;margin-top:.1rem}

.cta{background:var(--primary-blue-light);color:#fff;border-radius:var(--radius);padding:var(--s7);display:grid;grid-template-columns:minmax(0,1.6fr) auto;gap:var(--s6);align-items:center}
.cta h2{color:#fff;font-size:1.7rem;margin-bottom:var(--s3)}
.cta p{color:rgba(255,255,255,.85)}

/* §8 RESEARCH ---------------------------------------------------------------- */
.page-header{padding-block:var(--s7) var(--s6);border-bottom:1px solid var(--border-subtle);background:var(--background-off)}
.page-header h1{margin-bottom:var(--s3)}
.page-header__lede{font-size:1.125rem;color:var(--text-secondary);max-width:64ch}
.area{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:var(--s7);padding:var(--s7) 0;border-top:1px solid var(--border)}
.area:first-of-type{border-top:0;padding-top:0}
.area h3{font-size:1.5rem;margin-bottom:var(--s3)}
.area__lead{color:var(--text-secondary);margin-bottom:var(--s4)}
.area__side h4{font-size:var(--fs-xs);font-weight:600;color:var(--text-muted);margin-bottom:var(--s2);text-transform:none}
.area__side .tags{margin-bottom:var(--s5)}
.area__side ul{list-style:none}
.area__side li{font-size:var(--fs-sm);padding:.4rem 0;border-top:1px solid var(--border-subtle)}
.area__side li a{text-decoration:none;font-weight:500}
.area__side li .muted{display:block;font-size:var(--fs-xs)}
.grants{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--s7)}
.grants h3{font-family:var(--font-sans);font-size:var(--fs-sm);color:var(--text-muted);margin-bottom:var(--s3)}
.grant{padding:var(--s3) 0;border-top:1px solid var(--border-subtle)}
.grant__title{font-weight:600}
.grant__org{font-size:var(--fs-sm);color:var(--text-secondary)}
.grant__meta{font-size:var(--fs-xs);color:var(--text-muted)}
.resources{list-style:none;border-top:1px solid var(--border)}
.resources li{display:grid;grid-template-columns:140px minmax(0,1fr) auto;gap:var(--s5);padding:var(--s4) 0;border-bottom:1px solid var(--border-subtle);align-items:baseline}
.resources .kind{font-size:var(--fs-xs);font-weight:600;color:var(--text-muted)}
.resources h3{font-family:var(--font-sans);font-size:var(--fs-body);margin-bottom:.15rem}
.resources p{font-size:var(--fs-sm);color:var(--text-secondary);max-width:none}
.resources .links{display:flex;gap:var(--s3);font-size:var(--fs-sm);font-weight:600;white-space:nowrap}
.resources .links a{text-decoration:none}

/* §9 PUBLICATIONS ------------------------------------------------------------ */
.pub-filters{display:flex;flex-wrap:wrap;gap:var(--s2);align-items:center;margin-bottom:var(--s6)}
.pub-filters .lbl{font-size:var(--fs-sm);color:var(--text-muted);margin-right:var(--s2)}
.filter-btn{font-family:var(--font-sans);font-size:var(--fs-sm);font-weight:500;padding:.3rem .8rem;border-radius:999px;border:1px solid var(--border);background:#fff;color:var(--text-secondary);cursor:pointer;transition:background var(--t),color var(--t),border-color var(--t)}
.filter-btn:hover{border-color:var(--primary-blue);color:var(--primary-blue)}
.filter-btn[aria-pressed=true]{background:var(--primary-blue);color:#fff;border-color:var(--primary-blue)}
.pub-year{margin-bottom:var(--s7)}
.pub-year[hidden]{display:none}
.pub-year__label{font-size:1.5rem;padding-bottom:var(--s2);border-bottom:2px solid var(--primary-blue);margin-bottom:var(--s2)}
.pub-group{font-family:var(--font-sans);font-size:var(--fs-xs);font-weight:600;color:var(--text-muted);margin:var(--s5) 0 var(--s2)}
.pub-group[hidden]{display:none}
.pub{display:grid;grid-template-columns:minmax(0,1fr) 140px;gap:var(--s5);padding:var(--s4) 0;border-bottom:1px solid var(--border-subtle)}
.pub[hidden]{display:none}
.pub__title{font-family:var(--font-serif);font-size:1.2rem;font-weight:600;line-height:1.3;margin-bottom:.3rem}
.pub__authors{font-size:var(--fs-sm);color:var(--text-secondary);max-width:none;margin:0 0 .15rem}
.pub__authors .me{font-weight:700;color:var(--text-primary)}
.pub__venue{font-size:var(--fs-sm);color:var(--text-muted);max-width:none;margin:0}
.pub__side{display:flex;flex-direction:column;align-items:flex-end;gap:var(--s2);text-align:right}
.pub__links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:var(--s2)}
.pub__links a{font-size:var(--fs-xs);font-weight:600;padding:.15rem .5rem;border:1px solid var(--border);border-radius:var(--radius);text-decoration:none}
.pub__links a:hover{border-color:var(--primary-blue)}
.pub-empty{padding:var(--s6);text-align:center;color:var(--text-muted);border:1px dashed var(--border);border-radius:var(--radius)}
.pub-empty[hidden]{display:none}

/* §10 GROUP ------------------------------------------------------------------ */
.pi{display:grid;grid-template-columns:140px minmax(0,1fr);gap:var(--s6);align-items:start}
.pi__photo{width:140px;height:140px;border-radius:50%;overflow:hidden;box-shadow:0 0 0 1px var(--border)}
.pi__photo img{width:100%;height:100%;object-fit:cover}
.pi h3{font-size:1.4rem;margin-bottom:.15rem}
.pi__role{color:var(--text-secondary);margin-bottom:var(--s3)}
.people{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s5)}
.people li{border-top:2px solid var(--primary-blue);padding-top:var(--s3)}
.people h3{font-family:var(--font-sans);font-size:1.05rem;margin-bottom:.1rem}
.people .role{font-size:var(--fs-sm);color:var(--text-secondary)}
.people .topic{font-size:var(--fs-sm);color:var(--text-muted);margin-top:.2rem}
.projects{list-style:none;counter-reset:proj}
.projects li{display:grid;grid-template-columns:48px minmax(0,1fr);gap:var(--s4);padding:var(--s4) 0;border-top:1px solid var(--border-subtle);counter-increment:proj}
.projects li::before{content:counter(proj,decimal-leading-zero);font-family:var(--font-serif);font-size:1.2rem;color:var(--accent-burgundy);padding-top:.1rem}
.projects h3{font-family:var(--font-sans);font-size:1.05rem;margin-bottom:.15rem}
.projects p{font-size:var(--fs-sm);color:var(--text-secondary)}
.mentees h3{font-family:var(--font-sans);font-size:var(--fs-sm);color:var(--text-muted);margin:var(--s6) 0 var(--s3)}
.mentees h3:first-of-type{margin-top:0}
.mentee-table{width:100%;border-collapse:collapse;font-size:var(--fs-sm)}
.mentee-table th{text-align:left;font-size:var(--fs-xs);color:var(--text-muted);padding:.5rem .6rem;border-bottom:1px solid var(--border)}
.mentee-table td{padding:.65rem .6rem;border-bottom:1px solid var(--border-subtle);vertical-align:top}
.mentee-table td:first-child{font-weight:600;white-space:nowrap}
.mentee-table td:last-child{color:var(--text-muted);white-space:nowrap}
.mentee-table .pub-ref{font-style:italic}
.steps{list-style:none;counter-reset:step}
.steps li{position:relative;padding-left:2.4rem;margin-bottom:var(--s4);counter-increment:step}
.steps li::before{content:counter(step);position:absolute;left:0;top:.05rem;width:1.7rem;height:1.7rem;border-radius:50%;background:var(--surface);color:var(--primary-blue);font-weight:600;font-size:var(--fs-sm);display:flex;align-items:center;justify-content:center}
.steps strong{display:block}
.steps span{font-size:var(--fs-sm);color:var(--text-secondary)}

/* §11 TEACHING --------------------------------------------------------------- */
.principles{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--s6) var(--s7)}
.principle{border-top:2px solid var(--primary-blue);padding-top:var(--s4)}
.principle h3{font-size:1.2rem;margin-bottom:var(--s2)}
.principle h3 span{font-family:var(--font-sans);font-size:var(--fs-sm);color:var(--accent-burgundy);margin-right:.6rem}
.principle p{font-size:var(--fs-sm);color:var(--text-secondary)}
.courses{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--s7)}
.course-block h3{font-size:1.2rem;margin-bottom:.1rem}
.course-block__meta{font-size:var(--fs-sm);color:var(--text-muted);margin-bottom:var(--s3)}
.course-list{list-style:none}
.course-list li{display:grid;grid-template-columns:92px minmax(0,1fr) auto;gap:var(--s3);padding:.4rem 0;border-top:1px solid var(--border-subtle);font-size:var(--fs-sm)}
.course-list .code{font-weight:600;color:var(--primary-blue);font-variant-numeric:tabular-nums}
.course-list .lvl{font-size:var(--fs-xs);color:var(--text-muted)}
.course-block__note{font-size:var(--fs-sm);color:var(--text-secondary);margin-top:var(--s3)}
.framework{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s6)}
.framework div{border-top:2px solid var(--primary-blue);padding-top:var(--s3)}
.framework h3{font-family:var(--font-sans);font-size:1.05rem;margin-bottom:.2rem}
.framework em{display:block;font-size:var(--fs-sm);color:var(--text-secondary);margin-bottom:var(--s3)}
.framework ul{list-style:none;font-size:var(--fs-sm);color:var(--text-secondary)}
.framework li{padding:.15rem 0 .15rem 1rem;position:relative}
.framework li::before{content:'';position:absolute;left:0;top:.7em;width:5px;height:5px;border-radius:50%;background:var(--accent-burgundy)}
.resource-panel{border:1px solid var(--border);border-left:4px solid var(--accent-burgundy);border-radius:var(--radius);padding:var(--s5) var(--s6);display:grid;grid-template-columns:minmax(0,1fr) auto;gap:var(--s6);align-items:center;margin-top:var(--s6);background:#fff}
.resource-panel h3{font-size:1.25rem;margin-bottom:.2rem}
.resource-panel .sub{font-weight:600;color:var(--text-secondary);margin-bottom:var(--s3)}
.resource-panel p{font-size:var(--fs-sm);color:var(--text-secondary)}

/* §12 CV --------------------------------------------------------------------- */
.cv-layout{display:grid;grid-template-columns:190px minmax(0,1fr);gap:var(--s8);align-items:start}
.cv-toc{position:sticky;top:calc(var(--header-h) + var(--s5))}
.cv-toc ul{list-style:none;border-left:1px solid var(--border)}
.cv-toc ul a{display:block;padding:.3rem 0 .3rem var(--s4);font-size:var(--fs-sm);color:var(--text-secondary);text-decoration:none;margin-left:-1px;border-left:2px solid transparent}
.cv-toc ul a:hover{color:var(--primary-blue);border-left-color:var(--primary-blue)}
.cv-toc .btn{margin-top:var(--s5);width:100%;justify-content:center}
.cv-section{padding-bottom:var(--s6);margin-bottom:var(--s6);border-bottom:1px solid var(--border-subtle);scroll-margin-top:calc(var(--header-h) + var(--s5))}
.cv-section:last-child{border-bottom:0}
.cv-section h2{font-size:1.5rem;margin-bottom:var(--s4)}
.cv-entry{display:grid;grid-template-columns:130px minmax(0,1fr);gap:var(--s4);padding:var(--s3) 0;border-top:1px solid var(--border-subtle)}
.cv-entry:first-of-type{border-top:0}
.cv-entry__when{font-size:var(--fs-sm);font-weight:600;color:var(--primary-blue)}
.cv-entry__what{font-weight:600}
.cv-entry__where{font-size:var(--fs-sm);color:var(--text-secondary)}
.cv-entry__note{font-size:var(--fs-sm);color:var(--text-muted);margin-top:.15rem}
.cv-list{list-style:none;columns:2;column-gap:var(--s6)}
.cv-list li{font-size:var(--fs-sm);color:var(--text-secondary);padding:.2rem 0;break-inside:avoid}
.cv-list strong{color:var(--text-primary)}

/* §13 CONTACT ---------------------------------------------------------------- */
.contact{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:var(--s8);align-items:start}
.contact-list{list-style:none}
.contact-list li{padding:var(--s4) 0;border-top:1px solid var(--border-subtle)}
.contact-list li:first-child{border-top:0;padding-top:0}
.contact-list h3{font-family:var(--font-sans);font-size:var(--fs-xs);font-weight:600;color:var(--text-muted);margin-bottom:.15rem}
.contact-list a{text-decoration:none}
.audience{list-style:none}
.audience li{padding:var(--s4) 0;border-top:1px solid var(--border-subtle)}
.audience li:first-child{border-top:0;padding-top:0}
.audience strong{display:block;margin-bottom:.15rem}
.audience span{font-size:var(--fs-sm);color:var(--text-secondary)}

/* §14 FOOTER ----------------------------------------------------------------- */
.site-footer{background:var(--primary-blue);color:rgba(255,255,255,.8);padding-block:var(--s6);font-size:var(--fs-sm);margin-top:var(--s6)}
.site-footer .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:var(--s5)}
.site-footer strong{color:#fff;font-family:var(--font-serif);font-size:1.05rem;display:block;margin-bottom:.2rem}
.site-footer a{color:rgba(255,255,255,.9);text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer .links{display:flex;flex-wrap:wrap;gap:var(--s4);align-items:center}
.site-footer .copy{width:100%;font-size:var(--fs-xs);color:rgba(255,255,255,.55);border-top:1px solid rgba(255,255,255,.15);padding-top:var(--s3)}

/* §15 MOTION ----------------------------------------------------------------- */
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important}}

/* §16 RESPONSIVE ------------------------------------------------------------- */
@media (max-width:1024px){
  .hero__grid{grid-template-columns:170px minmax(0,1fr);gap:var(--s6)}
  .hero__portrait{width:170px;height:170px}
  .hero__name{white-space:normal}
  .hero__visual{display:none}
  .themes,.featured,.framework{grid-template-columns:1fr 1fr}
  .people{grid-template-columns:1fr 1fr}
  .area{grid-template-columns:1fr;gap:var(--s5)}
  .cv-layout{grid-template-columns:1fr}
  .cv-toc{position:static}
  .cv-toc ul{display:flex;flex-wrap:wrap;gap:var(--s2);border:0}
  .cv-toc ul a{border:1px solid var(--border);border-radius:999px;padding:.25rem .7rem;margin:0}
  .cv-toc .btn{width:auto}
}
@media (max-width:768px){
  :root{--fs-body:1rem}
  .nav{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding-block:var(--s7)}
  .hero__grid{grid-template-columns:1fr;text-align:center;justify-items:center;padding-block:var(--s6)}
  .hero__name{white-space:normal;font-size:1.9rem}
  .hero__portrait{width:140px;height:140px}
  .hero__statement{text-align:left}
  .hero .btn-row,.hero .icon-links{justify-content:center}
  .themes,.featured,.framework,.principles,.courses,.grants,.contact,.people,.grid--2,.grid--3{grid-template-columns:1fr}
  .section-head--row{flex-direction:column;align-items:flex-start}
  .cta{grid-template-columns:1fr;padding:var(--s6)}
  .pub{grid-template-columns:1fr;gap:var(--s3)}
  .pub__side{flex-direction:row;align-items:center;justify-content:space-between;text-align:left}
  .pub__links{justify-content:flex-start}
  .resources li{grid-template-columns:1fr;gap:var(--s2)}
  .resource-panel{grid-template-columns:1fr}
  .pi{grid-template-columns:1fr}
  .cv-entry{grid-template-columns:1fr;gap:.1rem}
  .cv-list{columns:1}
  .news li{grid-template-columns:1fr;gap:.1rem}
  .mentee-table td:first-child,.mentee-table td:last-child{white-space:normal}
  .mentee-table th:nth-child(3),.mentee-table td:nth-child(3){width:5.5rem}
  .progression{font-size:1rem}
}
@media (max-width:480px){
  .container{padding-inline:var(--s4)}
  .btn-row .btn{flex:1 1 auto;justify-content:center}
  .course-list li{grid-template-columns:80px minmax(0,1fr)}
  .course-list .lvl{grid-column:2}
}
@media print{.site-header,.mobile-nav,.site-footer,.nav-toggle,.cta,.skip-link{display:none!important}a{color:#000}}

/* §17 INTERACTIVE EXPLORERS (v6) ------------------------------------------- */
.explorer{border:1px solid var(--border);border-radius:var(--radius);background:#fff;padding:var(--s5);margin:var(--s5) 0}
.explorer__title{font-family:var(--font-sans);font-size:var(--fs-body);font-weight:600;margin-bottom:.2rem}
.explorer__note{font-size:var(--fs-xs);color:var(--text-muted);margin-bottom:var(--s4)}
.explorer svg{width:100%;height:auto;display:block}
.explorer canvas{width:100%;height:auto;display:block;border-radius:var(--radius)}
.explorer__controls{display:flex;flex-wrap:wrap;gap:var(--s4) var(--s6);margin-top:var(--s4);align-items:center}
.explorer__controls label{font-size:var(--fs-sm);color:var(--text-secondary);display:flex;align-items:center;gap:.5rem}
.explorer__controls input[type=range]{width:150px;accent-color:var(--accent)}
.explorer__controls input[type=checkbox]{accent-color:var(--accent);width:16px;height:16px}
.explorer__controls output{font-variant-numeric:tabular-nums;font-weight:600;color:var(--text-primary);min-width:2.6em}
.explorer__out{display:flex;flex-wrap:wrap;gap:var(--s2) var(--s5);margin-top:var(--s3);font-size:var(--fs-sm);color:var(--text-secondary)}
.explorer .btn{padding:.4rem .9rem}
.figure{margin:var(--s5) 0}
.figure svg{width:100%;max-width:420px;height:auto;border:1px solid var(--border-subtle);border-radius:var(--radius);background:#fff}
.figure figcaption{font-size:var(--fs-xs);color:var(--text-muted);margin-top:var(--s2)}
math{font-size:1.05em}
.hero__visual .traj{stroke-dasharray:1;stroke-dashoffset:1;animation:draw 4.5s cubic-bezier(.4,0,.2,1) forwards}
.hero__visual .traj:nth-of-type(2){animation-delay:.4s}.hero__visual .traj:nth-of-type(3){animation-delay:.8s}.hero__visual .traj:nth-of-type(4){animation-delay:1.2s}
@keyframes draw{to{stroke-dashoffset:0}}
@media (prefers-reduced-motion:reduce){.hero__visual .traj{animation:none;stroke-dashoffset:0}}
@media (max-width:768px){.explorer__controls input[type=range]{width:120px}}

/* §18 RESEARCH DIAGRAM + PILLARS (v7) --------------------------------------- */
.rdiag{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;align-items:center;gap:var(--s2);margin:var(--s5) 0 var(--s7)}
.rdiag__node{display:block;text-decoration:none;border:1px solid var(--border);border-radius:var(--radius);padding:var(--s3) var(--s4);background:#fff;transition:border-color var(--t),box-shadow var(--t),transform var(--t)}
.rdiag__node:hover,.rdiag__node:focus-visible{border-color:var(--accent);transform:translateY(-2px);text-decoration:none}
.rdiag__node.is-active{border-color:var(--accent);box-shadow:inset 3px 0 0 var(--accent)}
.rdiag__num,.rdiag__title,.rdiag__sub{display:block}
.rdiag__num{font-size:var(--fs-xs);font-weight:600;color:var(--accent)}
.rdiag__title{font-family:var(--font-serif);font-size:1.02rem;font-weight:600;color:var(--primary-blue);line-height:1.25}
.rdiag__sub{font-size:var(--fs-xs);color:var(--text-muted);margin-top:.15rem}
.rdiag__arrow{width:34px;height:2px;position:relative;background:repeating-linear-gradient(90deg,var(--accent) 0 6px,transparent 6px 11px);background-size:22px 2px;animation:march 1.4s linear infinite}
.rdiag__arrow::after{content:'';position:absolute;right:-1px;top:-4px;border:5px solid transparent;border-left:7px solid var(--accent)}
@keyframes march{to{background-position:22px 0}}
.rdiag__caption{font-size:var(--fs-sm);color:var(--text-secondary);max-width:70ch;margin-top:calc(-1*var(--s5));margin-bottom:var(--s6)}
.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s6) var(--s5)}
.pillar{border-top:2px solid var(--primary-blue);padding-top:var(--s4);display:flex;flex-direction:column;scroll-margin-top:calc(var(--header-h) + var(--s5))}
.pillar.is-active{border-top-color:var(--accent)}
.pillar__anim{background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius);overflow:hidden;aspect-ratio:3/2;margin-bottom:var(--s3)}
.pillar__anim svg{width:100%;height:100%;display:block}
.pillar__num{font-size:var(--fs-xs);font-weight:600;color:var(--accent);margin-bottom:.1rem}
.pillar h3{font-size:1.15rem;margin-bottom:var(--s2)}
.pillar>p{font-size:var(--fs-sm);color:var(--text-secondary);margin-bottom:var(--s3)}
.pillar__toggle{align-self:flex-start;margin-top:auto;background:none;border:1px solid var(--border);border-radius:var(--radius);padding:.35rem .75rem;font-family:var(--font-sans);font-size:var(--fs-xs);font-weight:600;color:var(--primary-blue);cursor:pointer;transition:border-color var(--t),background var(--t)}
.pillar__toggle:hover{border-color:var(--accent);background:var(--accent-soft)}
.pillar__toggle[aria-expanded=true]{background:var(--accent-soft);border-color:var(--accent)}
.pillar__detail{margin-top:var(--s3);padding-top:var(--s3);border-top:1px solid var(--border-subtle);font-size:var(--fs-sm)}
.pillar__detail[hidden]{display:none}
.pillar__detail h4{font-size:var(--fs-xs);color:var(--text-muted);margin:var(--s3) 0 .2rem}
.pillar__detail h4:first-child{margin-top:0}
.pillar__detail ul{list-style:none}
.pillar__detail li{padding:.15rem 0;color:var(--text-secondary)}
.pillar__detail li a{text-decoration:none;font-weight:500}
.pillar__detail .tags{margin-bottom:var(--s2)}
.pillar__detail .link-arrow{margin-top:var(--s3)}
/* pillar animations (all CSS; disabled under reduced motion) */
.pa-draw{stroke-dasharray:1;stroke-dashoffset:1;animation:pdraw 6s ease-in-out infinite}
.pa-draw:nth-of-type(2){animation-delay:.5s}.pa-draw:nth-of-type(3){animation-delay:1s}
.pa-late{animation:pdraw2 7s ease-in-out infinite}.pa-later{animation:pdraw3 7s ease-in-out infinite}
@keyframes pdraw{0%{stroke-dashoffset:1}55%{stroke-dashoffset:0}85%{stroke-dashoffset:0}100%{stroke-dashoffset:1}}
@keyframes pdraw2{0%,45%{stroke-dashoffset:1}65%{stroke-dashoffset:0}100%{stroke-dashoffset:0}}
@keyframes pdraw3{0%,70%{stroke-dashoffset:1}90%,100%{stroke-dashoffset:0}}
.pa-pop{opacity:0;animation:ppop 7s ease-out infinite}
@keyframes ppop{0%{opacity:0;transform:translateY(-4px)}6%,100%{opacity:1;transform:none}}
.pa-flow{offset-distance:0%;offset-rotate:0deg;animation:pflow 8s linear infinite}
@keyframes pflow{to{offset-distance:100%}}
.pa-scroll{animation:pscroll 9s linear infinite}
@keyframes pscroll{to{transform:translateX(-300px)}}
@media (prefers-reduced-motion:reduce){.pa-draw,.pa-late,.pa-later{animation:none;stroke-dashoffset:0}.pa-pop{animation:none;opacity:1}.pa-flow{animation:none;offset-distance:40%}.pa-scroll{animation:none}.rdiag__arrow{animation:none}}
@media (max-width:1024px){.pillars{grid-template-columns:1fr 1fr}.rdiag{grid-template-columns:1fr;gap:var(--s2)}.rdiag__arrow{width:2px;height:22px;margin-left:var(--s5);background:repeating-linear-gradient(180deg,var(--accent) 0 6px,transparent 6px 11px);background-size:2px 22px;animation-name:marchv}.rdiag__arrow::after{right:-4px;top:auto;bottom:-3px;border:5px solid transparent;border-top:7px solid var(--accent)}@keyframes marchv{to{background-position:0 22px}}}
@media (max-width:768px){.pillars{grid-template-columns:1fr}}