/* ============================================================
   Asadbek Sultonov — Portfolio
   ============================================================ */

:root{
  color-scheme: light;

  /* palette */
  --ink:        #0c1524;
  --ink-2:      #142338;
  --ink-3:      #1c2f4a;
  --paper:      #f7f5f0;
  --paper-2:    #efece1;
  --card:       #ffffff;
  --gold:       #b9852f;
  --gold-light: #e3bd72;
  --gold-dim:   #c8973f;
  --teal:       #2f6f66;
  --text:       #1b2230;
  --text-muted: #626a7a;
  --text-on-dark: #eef1f6;
  --text-on-dark-muted: #a6b0c3;
  --line: rgba(12,21,36,0.10);
  --line-dark: rgba(238,241,246,0.12);

  --radius: 22px;
  --radius-sm: 14px;
  --shadow-soft: 0 20px 50px -25px rgba(12,21,36,0.35);
  --shadow-card: 0 10px 30px -15px rgba(12,21,36,0.25);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);

  /* liquid glass material */
  --glass-blur: 22px;
  --glass-sat: 180%;
  --glass-light-bg: rgba(255,255,255,0.5);
  --glass-light-bg-strong: rgba(255,255,255,0.68);
  --glass-light-border: rgba(255,255,255,0.65);
  --glass-dark-bg: rgba(22,39,63,0.42);
  --glass-dark-bg-strong: rgba(22,39,63,0.6);
  --glass-dark-border: rgba(255,255,255,0.16);
  --glass-shine-light: linear-gradient(128deg, rgba(255,255,255,0.65) 0%, rgba(255,255,255,0.06) 32%, rgba(255,255,255,0) 55%);
  --glass-shine-dark: linear-gradient(128deg, rgba(255,255,255,0.22) 0%, rgba(255,255,255,0.03) 32%, rgba(255,255,255,0) 55%);
  --glass-shadow: 0 20px 44px -22px rgba(12,21,36,0.4), inset 0 1px 0 rgba(255,255,255,0.55);
  --glass-shadow-dark: 0 20px 44px -18px rgba(0,0,0,0.55), inset 0 1px 0 rgba(255,255,255,0.14);
}

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

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width: 100%; display: block; }

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

.wrap{
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

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

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  margin: 0 0 .5em;
  color: inherit;
}

p{ margin: 0 0 1em; }

/* -------------------- Reveal-on-scroll -------------------- */
.reveal{
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay: var(--delay, 0s);
}
.reveal.visible{
  opacity: 1;
  transform: translateY(0);
}

/* -------------------- Progress bar -------------------- */
.progress-bar{
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  z-index: 1000;
  transition: width .1s linear;
}

/* -------------------- Header (floating liquid glass) -------------------- */
.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  padding: 16px 20px 0;
  color: var(--text-on-dark);
  transition: color .35s var(--ease);
}
.site-header.scrolled{ color: var(--ink); }
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 11px 14px 11px 22px;
  border-radius: 999px;
  position: relative;
  isolation: isolate;
  background: var(--glass-dark-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-dark-border);
  box-shadow: var(--glass-shadow-dark);
  transition: background .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.header-inner::before{
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--glass-shine-dark);
  pointer-events: none;
  z-index: -1;
}
.site-header.scrolled .header-inner{
  background: var(--glass-light-bg-strong);
  border-color: rgba(12,21,36,0.1);
  box-shadow: var(--glass-shadow);
}
.site-header.scrolled .header-inner::before{ background: var(--glass-shine-light); }
.brand{
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}
.brand-mark{
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: var(--ink);
  color: var(--gold-light);
  font-family: var(--font-display);
  font-size: 15px;
  border-radius: 10px;
}
.brand-name{
  font-family: var(--font-display);
  font-size: 17px;
  color: currentColor;
}
.main-nav{
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14.5px;
  font-weight: 500;
}
.main-nav a{
  color: currentColor;
  opacity: .8;
  position: relative;
  padding: 4px 0;
}
.main-nav a:hover{ opacity: 1; }
.main-nav a::after{
  content: "";
  position: absolute; left: 0; right: 100%; bottom: -2px;
  height: 1.5px;
  background: var(--gold);
  transition: right .3s var(--ease);
}
.main-nav a:hover::after{ right: 0; }
.nav-cta{
  background: var(--gold);
  color: #fff !important;
  padding: 9px 18px !important;
  border-radius: 100px;
  opacity: 1 !important;
  transition: background .25s var(--ease), transform .25s var(--ease);
}
.nav-cta:hover{ background: var(--gold-light); transform: translateY(-1px); }
.nav-cta::after{ display: none; }
.nav-toggle{
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span{
  width: 22px; height: 2px;
  background: currentColor;
  transition: transform .3s var(--ease), opacity .3s var(--ease), background .35s var(--ease);
}

/* -------------------- Buttons -------------------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 26px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 15px;
  border: 1.5px solid transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: transform .25s var(--ease), background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.btn::before{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 20%, rgba(255,255,255,0.55) 45%, transparent 70%);
  transform: translateX(-120%);
  transition: transform .6s var(--ease);
  z-index: 1;
  pointer-events: none;
}
.btn:hover::before{ transform: translateX(120%); }
.btn:hover{ transform: translateY(-2px); }
.btn-primary{
  background: var(--gold);
  color: #fff;
  box-shadow: 0 12px 28px -12px rgba(185,133,47,0.55);
}
.btn-primary:hover{ background: var(--gold-light); box-shadow: 0 16px 34px -14px rgba(185,133,47,0.65); }
.btn-ghost{
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border-color: rgba(255,255,255,0.35);
  color: var(--ink);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.35);
}
.btn-ghost:hover{ background: rgba(255,255,255,0.55); color: var(--ink); border-color: rgba(255,255,255,0.6); }

/* -------------------- Hero -------------------- */
.hero{
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background: radial-gradient(120% 90% at 80% 0%, #16273f 0%, var(--ink) 55%, #08101c 100%);
  color: var(--text-on-dark);
  overflow: hidden;
  padding-top: 100px;
}
.hero-bg{ position: absolute; inset: 0; }
.hero-cross{
  position: absolute;
  right: -6%;
  top: 50%;
  transform: translateY(-50%);
  width: 620px;
  height: 620px;
  fill: rgba(201,151,63,0.07);
}
.hero-orb{
  position: absolute;
  border-radius: 50%;
  filter: blur(6px);
}
.hero-orb-gold{
  width: 460px; height: 460px;
  right: 4%; top: -8%;
  background: radial-gradient(circle, rgba(227,189,114,0.5) 0%, rgba(227,189,114,0) 70%);
}
.hero-orb-teal{
  width: 520px; height: 520px;
  left: -10%; bottom: -18%;
  background: radial-gradient(circle, rgba(47,111,102,0.55) 0%, rgba(47,111,102,0) 70%);
}
.hero-grain{
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 3px 3px;
  mix-blend-mode: overlay;
}
.hero-inner{
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 40px;
  align-items: center;
  padding-top: 30px;
  padding-bottom: 70px;
}
.eyebrow{
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gold-light);
  margin-bottom: 18px;
}
.hero h1{
  font-size: clamp(48px, 6.4vw, 84px);
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}
.hero h1 span{ color: var(--gold-light); font-style: italic; }
.hero-role{
  font-size: clamp(16px, 1.7vw, 19px);
  color: var(--text-on-dark-muted);
  max-width: 540px;
  margin-bottom: 34px;
}
.hero-actions{
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 34px;
}
.hero .btn-ghost{
  border-color: rgba(238,241,246,0.4);
  color: var(--text-on-dark);
}
.hero .btn-ghost:hover{ background: #fff; color: var(--ink); border-color: #fff; }
.hero-meta{
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-on-dark-muted);
}

.hero-portrait{
  position: relative;
  justify-self: center;
}
.portrait-frame{
  width: min(340px, 80vw);
  aspect-ratio: 1/1;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid rgba(238,241,246,0.18);
  box-shadow: var(--shadow-soft);
  background: linear-gradient(160deg, #1c2f4a, #0c1524);
  position: relative;
}
.portrait-frame::before{
  content: "";
  position: absolute; inset: -3px;
  border-radius: 50%;
  border: 1.5px dashed rgba(201,151,63,0.5);
  animation: spin 40s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }
.portrait-frame img{
  width: 100%; height: 100%; object-fit: cover;
}
.portrait-badge{
  position: absolute;
  bottom: 6%;
  left: -8%;
  background: var(--glass-light-bg-strong);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-light-border);
  color: var(--ink);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  overflow: hidden;
}
.portrait-badge::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-light);
  pointer-events: none;
}
.portrait-badge strong, .portrait-badge span{ position: relative; }
.portrait-badge strong{ font-size: 14px; }
.portrait-badge span{ font-size: 12px; color: var(--text-muted); }

.scroll-cue{
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1.5px solid rgba(238,241,246,0.4);
  border-radius: 100px;
}
.scroll-cue span{
  position: absolute;
  top: 7px; left: 50%;
  width: 4px; height: 8px;
  margin-left: -2px;
  border-radius: 4px;
  background: var(--gold-light);
  animation: cue 1.8s ease-in-out infinite;
}
@keyframes cue{
  0%{ opacity: 1; transform: translateY(0); }
  70%{ opacity: 0; transform: translateY(14px); }
  100%{ opacity: 0; }
}

/* -------------------- Stats strip -------------------- */
.stats-strip{
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
  position: relative;
}
.stats-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 40px 28px;
}
.stat{
  position: relative;
  text-align: center;
  padding: 20px 12px;
  border-radius: var(--radius-sm);
  background: var(--glass-light-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-light-border);
  box-shadow: var(--glass-shadow);
  overflow: hidden;
}
.stat::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-light);
  pointer-events: none;
}
.stat-num, .stat-label{ position: relative; }
.stat-num{
  display: block;
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 44px);
  color: var(--ink);
  font-weight: 600;
}
.stat-label{
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}

/* -------------------- Sections -------------------- */
.section{
  padding: 110px 0;
  position: relative;
  overflow: hidden;
}
/* first section on a secondary page (no full hero above it) needs
   extra clearance so the floating header doesn't sit on top of it */
.gallery-hero{ padding-top: 168px; }
.section::before, .section::after{
  content: "";
  position: absolute;
  z-index: 0;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  pointer-events: none;
}
.section::before{
  top: -220px;
  left: -160px;
  background: radial-gradient(circle, rgba(227,189,114,0.32) 0%, rgba(227,189,114,0) 70%);
}
.section::after{
  bottom: -240px;
  right: -180px;
  background: radial-gradient(circle, rgba(47,111,102,0.26) 0%, rgba(47,111,102,0) 70%);
}
.section-dark{
  background: var(--ink);
  color: var(--text-on-dark);
}
.section-dark::before{ background: radial-gradient(circle, rgba(227,189,114,0.16) 0%, rgba(227,189,114,0) 70%); }
.section-dark::after{ background: radial-gradient(circle, rgba(47,111,102,0.2) 0%, rgba(47,111,102,0) 70%); }
.section-dark .muted{ color: var(--text-on-dark-muted); }

.kicker{
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}
.section-dark .kicker{ color: var(--gold-light); }
.section-head h2{
  font-size: clamp(30px, 4vw, 46px);
  max-width: 620px;
}
.section-head{ margin-bottom: 56px; }

/* -------------------- About -------------------- */
.about-grid{
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 60px;
}
.lede{ font-size: 19px; color: var(--text); }
.interest-tags{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 40px;
}
.interest-tags span{
  padding: 9px 16px;
  border-radius: 100px;
  background: var(--glass-light-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-light-border);
  box-shadow: 0 1px 0 rgba(255,255,255,0.5) inset;
  font-size: 13.5px;
  font-weight: 500;
}
.about-cards{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.mini-card{
  position: relative;
  overflow: hidden;
  background: var(--glass-light-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-light-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
  padding: 26px;
}
.mini-card::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-light);
  pointer-events: none;
}
.mini-card > *{ position: relative; }
.mini-card h3{
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--gold);
  font-family: var(--font-body);
  font-weight: 700;
  margin-bottom: 16px;
}
.mini-card p{ font-size: 14.5px; }
.lang-list{ list-style: none; margin: 0; padding: 0; }
.lang-list li{
  display: grid;
  grid-template-columns: 70px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-size: 13.5px;
}
.lang-list b{ font-weight: 500; color: var(--text-muted); }
.dots{
  display: flex;
  gap: 4px;
}
.dots::before{
  content: "";
  display: flex;
}
.lang-list .dots{ position: relative; height: 8px; }
.lang-list .dots{
  background-image: radial-gradient(circle, var(--line) 3px, transparent 3px);
  background-size: 14px 8px;
  background-repeat: repeat-x;
  background-position: left center;
}
.lang-list li[data-level] .dots{}
.lang-list li em.dots{
  --n: 5;
  position: relative;
}
.lang-list li em.dots::after{
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: calc(var(--fill, 0) * 14px);
  background-image: radial-gradient(circle, var(--gold) 3px, transparent 3px);
  background-size: 14px 8px;
  background-repeat: repeat-x;
}
.lang-list li:nth-child(1) em{ --fill: 5; }
.lang-list li:nth-child(2) em{ --fill: 4; }
.lang-list li:nth-child(3) em{ --fill: 4; }
.lang-list li:nth-child(4) em{ --fill: 2; }

/* -------------------- Chart card -------------------- */
.chart-card{
  position: relative;
  overflow: hidden;
  margin-top: 56px;
  background: var(--glass-light-bg-strong);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-light-border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--glass-shadow);

  color-scheme: light;
  --surface-1: #ffffff;
  --text-primary: #1b2230;
  --text-secondary: #626a7a;
  --grid-line: #e7e4da;
  --series-1: #b9852f;
  --series-1-fill: rgba(185,133,47,0.14);
}
.chart-card::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-light);
  pointer-events: none;
}
.chart-card > *{ position: relative; }
.chart-head h3{ font-size: 20px; margin-bottom: 8px; }
.chart-head p{ font-size: 14px; margin-bottom: 26px; }
.gpa-chart{ width: 100%; height: auto; overflow: visible; }
.gpa-grid-line{ stroke: var(--grid-line); stroke-width: 1; }
.gpa-grid-label{ fill: var(--text-secondary); font-size: 11px; font-family: var(--font-body); }
.gpa-area{ fill: var(--series-1-fill); stroke: none; }
.gpa-line{ fill: none; stroke: var(--series-1); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.gpa-dot{ fill: var(--surface-1); stroke: var(--series-1); stroke-width: 2.5; cursor: pointer; }
.gpa-dot:hover, .gpa-dot.active{ fill: var(--series-1); }
.gpa-axis-labels text{ fill: var(--text-secondary); font-size: 11px; font-family: var(--font-body); }
.gpa-peak-label{ fill: var(--text-primary); font-weight: 600; font-size: 12px; font-family: var(--font-body); }
.chart-tooltip{
  position: relative;
  min-height: 20px;
  text-align: center;
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 600;
  margin-top: 6px;
}
.chart-table{ margin-top: 22px; font-size: 13.5px; }
.chart-table summary{
  cursor: pointer;
  color: var(--gold);
  font-weight: 600;
  outline: none;
}
.chart-table table{
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
}
.chart-table th, .chart-table td{
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  font-variant-numeric: tabular-nums;
}
.chart-table th{ color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }

/* -------------------- Timeline -------------------- */
.timeline{
  list-style: none;
  margin: 0; padding: 0;
  position: relative;
  max-width: 820px;
}
.timeline::before{
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 1px;
  background: var(--line-dark);
}
.timeline-item{
  position: relative;
  padding-left: 40px;
  margin-bottom: 44px;
}
.timeline-item:last-child{ margin-bottom: 0; }
.timeline-dot{
  position: absolute;
  left: 0; top: 6px;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--gold-light);
}
.timeline-date{
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--gold-light);
  margin-bottom: 8px;
}
.timeline-card{
  position: relative;
  overflow: hidden;
  background: var(--glass-dark-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-dark-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow-dark);
  padding: 26px 28px;
}
.timeline-card::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-dark);
  pointer-events: none;
}
.timeline-card > *{ position: relative; }
.timeline-card h3{
  font-size: 21px;
  color: #fff;
  margin-bottom: 4px;
}
.timeline-org{
  font-size: 14px;
  color: var(--text-on-dark-muted);
  margin-bottom: 14px;
  font-style: italic;
}
.timeline-card ul{
  margin: 0; padding-left: 20px;
  color: var(--text-on-dark-muted);
  font-size: 15px;
}
.timeline-card li{ margin-bottom: 6px; }

/* -------------------- Research -------------------- */
.research-group + .research-group{
  margin-top: 50px;
  padding-top: 50px;
  border-top: 1px solid var(--line);
}
.group-title{
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--gold);
  margin: 0 0 22px;
}
.research-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-bottom: 0;
}
.research-group:last-of-type{ margin-bottom: 70px; }
.research-card{
  position: relative;
  overflow: hidden;
  background: var(--glass-light-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-light-border);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--glass-shadow);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
}
.research-card::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-light);
  pointer-events: none;
}
.research-card > *{ position: relative; }
.research-card:hover{
  transform: translateY(-4px);
  background: var(--glass-light-bg-strong);
  box-shadow: var(--shadow-soft);
}
.research-card.featured{
  grid-column: span 2;
  background: var(--glass-dark-bg-strong);
  border: 1px solid var(--glass-dark-border);
  box-shadow: var(--glass-shadow-dark);
  color: #fff;
}
.research-card.featured::before{ background: var(--glass-shine-dark); }
.research-card.featured:hover{ background: var(--glass-dark-bg-strong); }
.research-card.featured .research-tag{ background: rgba(255,255,255,0.12); color: var(--gold-light); }
.research-card.featured p{ color: var(--text-on-dark-muted); }
.research-tag{
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  background: rgba(255,255,255,0.55);
  color: var(--teal);
  padding: 6px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.research-card h3{ font-size: 19px; margin-bottom: 10px; }
.research-card a{ color: var(--gold); text-decoration: underline; text-underline-offset: 2px; }
.research-card.featured a{ color: var(--gold-light); }
.research-card p.muted + p.muted{ margin-top: -6px; }

.extra-block h3{
  font-size: 22px;
  margin-bottom: 26px;
}
.pill-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.pill-item{
  position: relative;
  overflow: hidden;
  padding: 22px 24px;
  border-left: 3px solid var(--gold);
  background: var(--glass-light-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border-top: 1px solid var(--glass-light-border);
  border-right: 1px solid var(--glass-light-border);
  border-bottom: 1px solid var(--glass-light-border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.pill-item::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-light);
  pointer-events: none;
}
.pill-item > *{ position: relative; }
.pill-item strong{ display: block; margin-bottom: 6px; font-size: 15.5px; }
.pill-item span{ font-size: 13.5px; color: var(--text-muted); }

/* -------------------- Achievements -------------------- */
.achieve-list{
  display: grid;
  gap: 18px;
  margin-bottom: 60px;
}
.achieve-row{
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 24px;
  background: var(--glass-dark-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-dark-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--glass-shadow-dark);
}
.achieve-row::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-dark);
  pointer-events: none;
}
.achieve-row > *{ position: relative; }
.achieve-rank{ font-size: 26px; line-height: 1; }
.achieve-row h3{ font-size: 18px; color: #fff; margin-bottom: 4px; }

.gallery-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 40px;
}
/* the gallery page's own grid: denser, and its photos run mostly
   portrait rather than the achievements section's landscape scans */
.gallery-grid-large{ grid-template-columns: repeat(4, 1fr); }
.gallery-grid-large .gallery-item{ aspect-ratio: 3/4; }
.gallery-item{
  position: relative;
  border: none;
  padding: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
  background: var(--ink-2);
}
.gallery-item-video::after{
  content: "▶";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 56px; height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: 4px;
  border-radius: 50%;
  background: rgba(12,21,36,0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: #fff;
  font-size: 19px;
  pointer-events: none;
  transition: transform .3s var(--ease), background .3s var(--ease);
}
.gallery-item-video:hover::after{ background: var(--gold); transform: translate(-50%, -50%) scale(1.08); }
.gallery-item img{
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s var(--ease), filter .5s var(--ease);
  filter: saturate(0.92);
}
.gallery-item:hover img{ transform: scale(1.06); filter: saturate(1.05); }
.gallery-item span{
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 14px 16px 12px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(0deg, rgba(8,13,22,0.68), rgba(8,13,22,0.1) 80%, transparent);
  backdrop-filter: blur(8px) saturate(140%);
  -webkit-backdrop-filter: blur(8px) saturate(140%);
  text-align: left;
}
.cred-list{
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line-dark);
  font-size: 14px;
  color: var(--text-on-dark-muted);
}
.cred-list li::before{ content: "✓ "; color: var(--gold-light); }

/* -------------------- Skills -------------------- */
.skills-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.skill-card{
  position: relative;
  overflow: hidden;
  background: var(--glass-light-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-light-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
  padding: 30px;
  transition: transform .3s var(--ease), background .3s var(--ease);
}
.skill-card:hover{ transform: translateY(-4px); background: var(--glass-light-bg-strong); }
.skill-card::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-light);
  pointer-events: none;
}
.skill-card > *{ position: relative; }
.skill-card h3{
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-family: var(--font-body);
  color: var(--gold);
  margin-bottom: 18px;
}
.tag-list{ list-style: none; margin: 0; padding: 0; }
.tag-list li{
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
}
.tag-list li:first-child{ border-top: none; }

/* -------------------- Contact -------------------- */
.section-contact{
  background: var(--paper-2);
}
.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}
.contact-grid h2{ font-size: clamp(32px, 4.5vw, 50px); }
.contact-cards{
  display: grid;
  gap: 14px;
}
/* only the email card remains — give it a bit more presence than a
   leftover row from a taller stack */
.contact-cards-single .contact-card{
  padding: 28px 26px;
}
.contact-cards-single .contact-icon{ font-size: 28px; }
.contact-cards-single strong{ font-size: 17px; }
.contact-cards-single em{ font-size: 14.5px; }
.contact-card{
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--glass-light-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-light-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--glass-shadow);
  padding: 20px 22px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}
.contact-card::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--glass-shine-light);
  pointer-events: none;
}
.contact-card > *{ position: relative; }
a.contact-card:hover{
  transform: translateX(6px);
  background: var(--glass-light-bg-strong);
  box-shadow: var(--shadow-soft);
}
.contact-icon{ font-size: 22px; }
.contact-card strong{ display: block; font-size: 15px; }
.contact-card em{ font-style: normal; font-size: 13.5px; color: var(--text-muted); }

/* -------------------- Footer -------------------- */
.site-footer{
  background: var(--ink);
  color: var(--text-on-dark-muted);
  padding: 26px 0;
  font-size: 13.5px;
}
.footer-inner{
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-inner a:hover{ color: #fff; }

/* -------------------- Lightbox -------------------- */
.lightbox{
  position: fixed;
  inset: 0;
  background: rgba(8,13,22,0.78);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s var(--ease);
}
.lightbox.open{ opacity: 1; visibility: visible; }
.lightbox figure{
  margin: 0;
  max-width: 900px;
  max-height: 88vh;
  padding: 14px;
  border-radius: var(--radius);
  background: var(--glass-dark-bg);
  border: 1px solid var(--glass-dark-border);
  box-shadow: var(--glass-shadow-dark);
}
.lightbox img,
.lightbox video{
  max-height: 74vh;
  max-width: 100%;
  width: auto;
  margin: 0 auto;
  display: block;
  border-radius: calc(var(--radius) - 8px);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}
/* our own `display: block` above outranks the browser's default
   [hidden]{display:none} UA rule, so the hidden media element was
   still rendering underneath the visible one — restore it explicitly */
.lightbox img[hidden],
.lightbox video[hidden]{ display: none; }
.lightbox figcaption{
  color: var(--text-on-dark-muted);
  text-align: center;
  margin-top: 16px;
  padding: 0 8px;
  font-size: 14px;
}
.lightbox-close{
  position: absolute;
  top: 26px; right: 32px;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  background: var(--glass-dark-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-dark-border);
  border-radius: 50%;
  color: #fff;
  font-size: 26px;
  cursor: pointer;
  line-height: 1;
  transition: background .25s var(--ease), transform .25s var(--ease);
}
.lightbox-close:hover{ background: rgba(255,255,255,0.18); transform: rotate(90deg); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1240px){
  .gallery-grid-large{ grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-portrait{ order: -1; margin-bottom: 0; }
  .portrait-frame{ width: 220px; margin: 0 auto; }
  /* Once the portrait stacks above the copy the badge has nothing to
     anchor against — floating it just covers the photo. Sit it below. */
  .portrait-badge{
    position: static;
    transform: none;
    margin: 16px auto 0;
    width: max-content;
    flex-direction: row;
    align-items: baseline;
    gap: 8px;
    padding: 9px 16px;
  }
  .about-grid{ grid-template-columns: 1fr; gap: 34px; }
  .about-cards{ grid-template-columns: 1fr; }
  .research-card.featured{ grid-column: span 1; }
  .research-grid{ grid-template-columns: 1fr; }
  .pill-grid{ grid-template-columns: 1fr; }
  .skills-grid{ grid-template-columns: 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }
  .gallery-grid{ grid-template-columns: repeat(2, 1fr); }
}

/* The inline nav needs room for the brand, six links and the CTA. Below
   ~900px they collide, so the hamburger has to take over here — not at
   the phone breakpoint. */
@media (max-width: 900px){
  .main-nav{
    position: fixed;
    top: calc(74px + env(safe-area-inset-top));
    left: 20px; right: 20px;
    /* dropdown overlays the hero portrait; keep it near-opaque so the
       photo can't read through the link text */
    background: rgba(252,251,249,0.97);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
    border: 1px solid rgba(12,21,36,0.1);
    border-radius: var(--radius);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 16px;
    gap: 2px;
    box-shadow: var(--glass-shadow);
    transform: translateY(-14px);
    opacity: 0;
    visibility: hidden;
    color: var(--ink);
    transition: transform .3s var(--ease), opacity .3s var(--ease), visibility .3s var(--ease);
  }
  .main-nav.open{ transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav a{ font-size: 16px; padding: 12px 0; width: 100%; }
  .main-nav a::after{ display: none; }
  .nav-toggle{ display: flex; }
  .nav-cta{ width: 100%; text-align: center; margin-top: 8px; padding: 14px 18px !important; }
}

@media (max-width: 760px){
  .stats-grid{ grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .section{ padding: 76px 0; }
  .gallery-hero{ padding-top: 128px; }
  .gallery-grid-large{ grid-template-columns: repeat(2, 1fr); }
  .gallery-grid{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px){
  .gallery-grid{ grid-template-columns: 1fr; }
  .hero-meta{ flex-direction: column; gap: 8px; }
}

/* ============================================================
   Mobile experience
   ============================================================ */

/* Kill the 300ms tap delay artefacts and grey flash on touch */
@media (hover: none){
  a, button, summary, .gallery-item{ -webkit-tap-highlight-color: transparent; }
  /* hover styling shouldn't stick after a tap on touch devices */
  .research-card:hover, .skill-card:hover{ transform: none; }
  .btn:hover{ transform: none; }
  a.contact-card:hover{ transform: none; }
  .gallery-item:hover img{ transform: none; }
  .btn:hover::before{ transform: translateX(-120%); }
}

/* Anchor links must not land under the fixed header */
:where(#about, #experience, #research, #achievements, #skills, #contact){
  scroll-margin-top: 92px;
}

/* ---- Performance -------------------------------------------
   A blurred backdrop layer is one of the most expensive things a
   mobile GPU can composite, and the glass design puts ~50 of them
   on screen at once. Below the desktop breakpoint (phones and
   tablets alike) keep the effect only where an element genuinely
   floats over moving content — the nav, the menu, the lightbox and
   the gallery captions — and swap everything else for a more opaque
   background that reads the same but costs nothing to paint. */
@media (max-width: 1024px){
  .stat,
  .mini-card,
  .chart-card,
  .research-card,
  .skill-card,
  .contact-card,
  .pill-item,
  .interest-tags span,
  .btn-ghost{
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(255,255,255,0.9);
  }
  .timeline-card,
  .achieve-row,
  .research-card.featured{
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(24,40,64,0.92);
  }
  .btn-ghost{ background: rgba(255,255,255,0.14); }
  .hero .btn-ghost{ color: var(--text-on-dark); border-color: rgba(255,255,255,0.4); }
}

/* Touch ergonomics follow the pointer, not the viewport — a 768px
   tablet is still a finger. 44px is the Apple/WCAG minimum. */
@media (pointer: coarse){
  .nav-toggle{ width: 44px; height: 44px; align-items: center; justify-content: center; padding: 0; }
  .chart-table summary{ padding: 12px 0; }
  .footer-inner a{ padding: 12px 16px; }
  .research-card a{ display: inline-block; padding: 11px 0; }
  .brand{ padding: 5px 0; }
  .main-nav a{ padding: 10px 0; }
  .nav-cta{ padding: 13px 18px !important; }
  .gallery-item{ min-height: 44px; }
}

@media (max-width: 760px){

  /* Decorative glows are large blurred paint regions — shrink them */
  .section::before, .section::after{ width: 300px; height: 300px; }
  .hero-orb-gold{ width: 300px; height: 300px; }
  .hero-orb-teal{ width: 320px; height: 320px; }
  .hero-cross{ width: 380px; height: 380px; }

  /* ---- Hero ---- */
  .hero{ padding-top: 92px; }
  .hero-inner{ padding-top: 8px; padding-bottom: 48px; gap: 26px; }
  .portrait-frame{ width: 180px; }
  .hero h1{ margin-bottom: 14px; }
  .hero-role{ margin-bottom: 26px; }
  .hero-actions{ margin-bottom: 26px; gap: 12px; }
  .hero-actions .btn{ flex: 1 1 auto; min-height: 50px; }
  .scroll-cue{ display: none; }

  .nav-toggle{ margin-right: -4px; }

  /* ---- GPA chart: the SVG scales down ~2.6x on a phone, so
     type set for desktop lands at ~4px. Scale it back up in
     viewBox units and thin the axis so labels don't collide. ---- */
  .gpa-grid-label{ font-size: 25px; }
  .gpa-axis-labels text{ font-size: 25px; }
  .gpa-peak-label{ font-size: 27px; }
  /* push the x-axis clear of the lowest y-tick so "3.4" and "F19" don't collide.
     Only the x labels carry data-idx, so the peak callout stays put. */
  .gpa-axis-labels text[data-idx]{ transform: translateY(16px); }
  .gpa-axis-labels text[data-idx="2"],
  .gpa-axis-labels text[data-idx="6"],
  .gpa-axis-labels text[data-idx="10"]{ display: none; }
  .gpa-line{ stroke-width: 5; }
  .gpa-dot{ r: 9; stroke-width: 5; }
  .gpa-grid-line{ stroke-width: 2; }
  .chart-card{ padding: 24px 20px; }
  .chart-head h3{ font-size: 19px; }
  .chart-table{ overflow-x: auto; }

  /* ---- Spacing & type ---- */
  .section-head{ margin-bottom: 36px; }
  .lede{ font-size: 17px; }
  .research-card{ padding: 24px 22px; }
  .timeline-card{ padding: 22px 20px; }
  .timeline-item{ padding-left: 30px; margin-bottom: 30px; }
  .research-group + .research-group{ margin-top: 34px; padding-top: 34px; }
  .achieve-list{ gap: 12px; margin-bottom: 40px; }
  .achieve-row{ padding: 18px 18px; gap: 14px; }
  .about-cards{ gap: 16px; }
  .contact-grid{ gap: 30px; }
  .cred-list{ gap: 10px 20px; }

  /* ---- Lightbox: full-bleed on a phone ---- */
  .lightbox{ padding: 16px; overscroll-behavior: contain; }
  .lightbox figure{ padding: 10px; max-height: 92vh; }
  .lightbox img, .lightbox video{ max-height: 66vh; }
  .lightbox figcaption{ font-size: 13px; margin-top: 12px; }
  .lightbox-close{
    top: max(14px, env(safe-area-inset-top));
    right: 14px;
    width: 46px; height: 46px;
  }

  /* ---- Notch / home-indicator safe areas ---- */
  .site-header{
    padding-top: max(12px, env(safe-area-inset-top));
    padding-left: max(14px, env(safe-area-inset-left));
    padding-right: max(14px, env(safe-area-inset-right));
  }
  /* .header-inner is also a .wrap, but it's a pill with its own padding */
  .wrap:not(.header-inner){
    padding-left: max(22px, env(safe-area-inset-left));
    padding-right: max(22px, env(safe-area-inset-right));
  }
  .site-footer{ padding-bottom: max(26px, env(safe-area-inset-bottom)); }
  .footer-inner{ flex-direction: column; gap: 4px; text-align: center; }
}

@media (max-width: 400px){
  .header-inner{ padding-left: 14px; }
  .brand-name{ font-size: 15px; }
  .brand-mark{ width: 34px; height: 34px; font-size: 13px; }
  .hero-actions{ flex-direction: column; }
  .hero-actions .btn{ width: 100%; }
  .stats-grid{ grid-template-columns: 1fr 1fr; }
}

/* -------------------- Reduced motion -------------------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .reveal{ transition: none; opacity: 1; transform: none; }
  .portrait-frame::before{ animation: none; }
  .scroll-cue span{ animation: none; }
}