/* ═══════════════════════════════════════
   ACM India Summer School 2026
   Color scheme: ACM Blue + IITG CLST Navy/Gold/Red
   ═══════════════════════════════════════ */

/* ACM: #0277BD (blue), #01579B (dark blue), #E3F2FD (light blue)
   IITG CLST: #1A3668 (navy), #C8923B (gold/amber), #B5272B (red)  */

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

:root {
  /* Primary palette — ACM Blue + IITG Navy */
  --acm-blue: #0277BD;
  --acm-dark: #01579B;
  --acm-light: #E3F2FD;
  --iitg-navy: #1A3668;
  --iitg-gold: #C8923B;
  --iitg-gold-light: #E8B96A;
  --iitg-red: #B5272B;
  --iitg-red-light: #D44;

  /* Neutrals */
  --ink: #111827;
  --paper: #F8F7F4;
  --cream: #EEE9DF;
  --muted: #6B7280;
  --border: rgba(26, 54, 104, 0.13);
  --white: #ffffff;

  /* Fonts */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-sans: 'Syne', sans-serif;
  --font-mono: 'DM Mono', 'Courier New', monospace;

  --radius: 10px;
  --section-pad: 96px;
}

html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-x: hidden;
}
a { color: var(--acm-blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.mono { font-family: var(--font-mono); }
.container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }
.section { padding: var(--section-pad) 0; }

/* ── Section labels & titles ─────────── */
.section-label {
  display: block; font-size: 0.7rem;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--iitg-red); margin-bottom: 14px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.8vw, 3rem);
  font-weight: 900; line-height: 1.1;
  color: var(--iitg-navy); margin-bottom: 40px;
}
.section-title em { font-style: italic; color: var(--acm-blue); }
.section-title.centered { text-align: center; }
.body-text { font-size: 0.97rem; line-height: 1.8; color: #2d3748; margin-bottom: 18px; }

/* ═══════════════════════════════════════
   NAV
   ═══════════════════════════════════════ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: rgba(248, 247, 244, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 2px 24px rgba(1,87,155,0.09); }
.nav-inner {
  max-width: 1180px; margin: 0 auto;
  display: flex; align-items: center; gap: 16px;
  height: 66px; padding: 0 32px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; flex-shrink: 0;
}
.nav-brand:hover { text-decoration: none; }
.nav-logo { height: 60px; width: auto; object-fit: contain; filter: contrast(1.1) brightness(1.05);}
.nav-brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.nb-main { font-size: 0.85rem; font-weight: 800; color: var(--iitg-navy); }
.nb-sub { font-size: 0.65rem; color: var(--muted); letter-spacing: 0.06em; }

.nav-links {
  display: flex; list-style: none; gap: 2px; margin-left: auto; align-items: center;
}
.nav-links a {
  color: var(--iitg-navy); font-size: 0.83rem; font-weight: 700;
  padding: 6px 11px; border-radius: 6px;
  transition: background 0.18s, color 0.18s;
  text-decoration: none;
}
.nav-links a:hover { background: var(--acm-light); color: var(--acm-dark); }
.nav-cta {
  background: var(--iitg-navy) !important;
  color: var(--white) !important;
  padding: 7px 16px !important;
}
.nav-cta:hover { background: var(--acm-dark) !important; color: var(--white) !important; }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px; margin-left: auto;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--iitg-navy); border-radius: 2px; }

/* ═══════════════════════════════════════
   HERO
   ═══════════════════════════════════════ */
.hero {
  min-height: 100vh; position: relative;
  display: flex; align-items: center;
  overflow: hidden; padding-top: 66px;
  background: var(--iitg-navy);
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 80% 40%, rgba(2,119,189,0.35) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 10% 80%, rgba(200,146,59,0.18) 0%, transparent 60%),
    var(--iitg-navy);
}
.hero-grid-lines {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 52px 52px;
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 1180px; margin: 0 auto;
  padding: 72px 32px 80px; width: 100%;
}

/* Hero logos */
.hero-logos {
  display: flex; align-items: center; gap: 20px;
  margin-bottom: 36px;
  opacity: 0; animation: fadeUp 0.7s ease 0.1s forwards;
}
.hero-logo-img { height: 52px; width: auto; object-fit: contain; filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4)); }
.logo-sep { width: 1px; height: 44px; background: rgba(255,255,255,0.22); }
.acm-badge-hero { display: flex; align-items: center; gap: 12px; }
.acm-diamond {
  width: 48px; height: 48px;
  background: var(--iitg-red);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.acm-diamond span { font-family: var(--font-sans); font-size: 0.65rem; font-weight: 800; color: white; letter-spacing: 0.05em; }
.acm-badge-text { display: flex; flex-direction: column; line-height: 1.2; }
.acm-b1 { font-size: 1rem; font-weight: 800; color: white; }
.acm-b2 { font-size: 0.65rem; color: rgba(255,255,255,0.6); letter-spacing: 0.1em; }

/* Hero tag */
.hero-tag {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(2,119,189,0.2); border: 1px solid rgba(2,119,189,0.45);
  color: rgba(255,255,255,0.85); padding: 6px 14px;
  border-radius: 100px; font-size: 0.75rem; letter-spacing: 0.08em;
  margin-bottom: 28px;
  opacity: 0; animation: fadeUp 0.7s ease 0.25s forwards;
}
.pulse-dot {
  width: 8px; height: 8px; background: var(--iitg-gold);
  border-radius: 50%; flex-shrink: 0;
  animation: pulseDot 2s ease-in-out infinite;
}
@keyframes pulseDot { 0%,100%{transform:scale(1);opacity:1} 50%{transform:scale(1.5);opacity:0.6} }

/* Hero title */
/*.hero-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.8rem, 6.5vw, 6.5rem);
  font-weight: 600; line-height: 1.02;
  color: var(--white); max-width: 800px; margin-bottom: 28px;
}

.hline { display: block; }
.hline.italic { font-style: italic; color: var(--iitg-gold); }
.hline.sm { font-size: 0.6em; color: var(--iitg-gold-light); font-style: italic; }
.rl { opacity: 0; transform: translateY(28px); animation: slideUp 0.65s ease forwards; }
.rl:nth-child(1) { animation-delay: 0.35s; }
.rl:nth-child(2) { animation-delay: 0.5s; }
.rl:nth-child(3) { animation-delay: 0.65s; }
.rl:nth-child(4) { animation-delay: 0.8s; }
*/
.hero-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.6rem, 6vw, 6.2rem);
  font-weight: 600;
	
  line-height: 1.05;              /* slightly more breathing */
  letter-spacing: -0.02em;        /* removes “stretched” feel */
  text-align: center;
  color: var(--white);
  max-width: 780px;              /* tighter width = better composition */
  margin-bottom: 24px;
  margin-left: auto;
  margin-right: auto;
}

.hline {
  display: block;
}

/* Italic lines (gold accent) */
.hline.italic {
  font-style: italic;
  font-weight: 500;              /* lighter than main text */
  color: #7ab3e0;;
  font-size: 0.85em;
}

/* Smaller last line */
.hline.sm {
  font-size: 0.65em;             /* slightly bigger than before */
  color: var(--iitg-gold-light);
  font-style: italic;
  font-weight: 500;
}

/* Animation (refined easing) */
.rl {
  opacity: 0;
  transform: translateY(24px);
  animation: slideUp 0.7s cubic-bezier(0.22,1,0.36,1) forwards;
}

.rl:nth-child(1) { animation-delay: 0.3s; }
.rl:nth-child(2) { animation-delay: 0.45s; }
.rl:nth-child(3) { animation-delay: 0.6s; }
.rl:nth-child(4) { animation-delay: 0.75s; }
/* Hero chips */
.hero-chips {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 36px;
  opacity: 0; animation: fadeUp 0.7s ease 0.95s forwards;
}
.chip { font-family: var(--font-mono); font-size: 0.78rem; color: rgba(255,255,255,0.75); letter-spacing: 0.05em; }
.cdot { color: rgba(200,146,59,0.6); font-size: 1.2rem; }

/* Hero meta */
.hero-meta {
  display: flex; align-items: center; gap: 0;
  margin-bottom: 40px;
  opacity: 0; animation: fadeUp 0.7s ease 1.05s forwards;
}
.hm { display: flex; align-items: center; gap: 10px; padding: 0 28px 0 0; }
.hm-ico { font-size: 1.1rem; }
.hml { display: block; font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.45); }
.hmv { display: block; font-size: 0.95rem; font-weight: 700; color: white; margin-top: 1px; }
.hmsep { width: 1px; height: 36px; background: rgba(255,255,255,0.15); margin-right: 28px; }

/* Hero actions */
.hero-actions {
  display: flex; gap: 14px; align-items: center;
  opacity: 0; animation: fadeUp 0.7s ease 1.15s forwards;
}
.btn-primary {
  background: var(--acm-blue); color: white;
  padding: 13px 30px; font-family: var(--font-sans);
  font-weight: 700; font-size: 0.88rem; border-radius: var(--radius);
  transition: background 0.2s, transform 0.15s; text-decoration: none;
  box-shadow: 0 4px 16px rgba(2,119,189,0.4);
}
.btn-primary:hover { background: var(--acm-dark); transform: translateY(-2px); text-decoration: none; }
.btn-ghost { color: rgba(255,255,255,0.75); font-weight: 600; font-size: 0.88rem; padding: 13px 8px; text-decoration: none; transition: color 0.2s; }
.btn-ghost:hover { color: var(--iitg-gold-light); text-decoration: none; }

/* Hero deco */
.reveal-fade { opacity: 0; animation: fadeUp 0.7s ease forwards; }
.hero-deco-right {
  position: absolute; right: 0; top: 50%;
  transform: translateY(-50%);
  width: 400px; height: 520px;
  pointer-events: none; z-index: 1;
}
.deco-ring {
  position: absolute; border-radius: 50%;
  border: 1px solid rgba(2,119,189,0.2);
}
.deco-ring.r1 { width: 380px; height: 380px; top: 60px; right: -100px; }
.deco-ring.r2 { width: 230px; height: 230px; top: 150px; right: 40px; border-color: rgba(200,146,59,0.25); }
.deco-ring.r3 { width: 120px; height: 120px; top: 200px; right: 100px; border-color: rgba(255,255,255,0.1); }
.deco-label {
  position: absolute; bottom: 50px; right: 20px;
  font-size: 0.65rem; color: rgba(255,255,255,0.2);
  letter-spacing: 0.25em; writing-mode: vertical-rl;
}

/* ═══════════════════════════════════════
   ABOUT
   ═══════════════════════════════════════ */
.about { background: var(--paper); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.about-stats { display: flex; gap: 28px; margin-top: 36px; padding-top: 28px; border-top: 1px solid var(--border); }
.stat-box { display: flex; flex-direction: column; }
.stat-n { font-family: var(--font-display); font-size: 2.8rem; font-weight: 900; color: var(--iitg-navy); line-height: 1; }
.stat-l { font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-top: 3px; }

.about-card { background: var(--iitg-navy); border-radius: 14px; overflow: hidden; }
/*
.about-card-logos {
  background: rgba(255,255,255,0.06);
  padding: 22px 24px;
  display: flex; align-items: center; gap: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}  */
.about-card-logos {
  background: white;                 /* ✅ white top section */
  padding: 14px 16px;
  
  display: flex;
  justify-content: center;           /* ✅ center horizontally */
  align-items: center;               /* ✅ center vertically */
  gap: 18px;

  border-top-left-radius: 14px;      /* match card */
  border-top-right-radius: 14px;

  border-bottom: 1px solid rgba(0,0,0,0.06); /* subtle separator */
}
.ac-logo { height: 44px; width: auto; object-fit: contain; filter: brightness(1.05); }
.ac-acm { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }
.ac-acm-box {
  background: var(--iitg-red); color: white;
  font-family: var(--font-sans); font-weight: 900; font-size: 0.9rem;
  padding: 3px 10px; border-radius: 4px; letter-spacing: 0.06em;
}
.ac-body { padding: 24px; display: flex; flex-direction: column; gap: 20px; }
.ac-row { display: flex; gap: 14px; align-items: flex-start; }
.ac-ico { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.ac-lbl { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--iitg-gold); margin-bottom: 3px; }
.ac-val { font-size: 0.88rem; color: rgba(248,247,244,0.82); line-height: 1.5; }
.ac-val a { color: var(--iitg-gold-light); }

/* ═══════════════════════════════════════
   CLST
   ═══════════════════════════════════════ */
.clst-sec { background: var(--cream); }
.clst-inner { display: grid; grid-template-columns: 320px 1fr; gap: 64px; align-items: start; }
.clst-big-logo {
  width: 100%; max-width: 260px;
  object-fit: contain; margin: 0 auto 24px; display: block;
  filter: drop-shadow(0 4px 16px rgba(26,54,104,0.15));
}
.clst-img-col { display: flex; flex-direction: column; align-items: center; }
.clst-badge-block {
  background: var(--iitg-navy); border-radius: 10px;
  padding: 18px 20px; text-align: center; width: 100%;
  display: flex; flex-direction: column; gap: 4px;
}
.clst-b-top { font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--iitg-gold); }
.clst-b-main { font-size: 0.9rem; font-weight: 700; color: white; line-height: 1.4; margin: 6px 0 4px; }
.clst-b-web { font-size: 0.7rem; color: rgba(200,146,59,0.85); }
.clst-b-web a { color: inherit; }
.clst-pillars {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px; margin-top: 24px;
}
.pillar {
  display: flex; align-items: center; gap: 10px;
  background: white; border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 14px;
  font-size: 0.82rem; font-weight: 600; color: var(--iitg-navy);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.pillar:hover { border-color: var(--acm-blue); box-shadow: 0 2px 12px rgba(2,119,189,0.1); }
.p-ico { font-size: 1.1rem; flex-shrink: 0; }

/* ═══════════════════════════════════════
   TOPICS
   ═══════════════════════════════════════ */
.topics { background: var(--paper); }
.topics-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; }
.tc-head { margin-bottom: 18px; }
.tc-badge {
  display: inline-block;
  font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 5px 12px; border-radius: 4px;
}
.theory-badge { background: var(--iitg-navy); color: white; }
.lab-badge { background: var(--iitg-red); color: white; }
.tlist { list-style: none; display: flex; flex-direction: column; }
.tlist li {
  display: flex; gap: 14px; align-items: baseline;
  padding: 13px 0; border-bottom: 1px solid var(--border);
  font-size: 0.9rem; font-weight: 600; color: var(--ink);
  transition: color 0.2s;
}
.tlist li:hover { color: var(--acm-blue); }
.tn {
  font-family: var(--font-mono); font-size: 0.68rem; flex-shrink: 0;
  background: var(--acm-light); color: var(--acm-dark);
  padding: 2px 7px; border-radius: 4px; letter-spacing: 0.04em;
}
.lab-tn { background: rgba(181,39,43,0.1); color: var(--iitg-red); }
.lab-col .tlist { margin-bottom: 28px; }
.prereq-card {
  background: var(--iitg-navy); border-radius: 10px; padding: 22px 24px;
}
.prereq-title { font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--iitg-gold); margin-bottom: 14px; display: block; }
.prereq-list { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.prereq-list li { font-size: 0.87rem; color: rgba(248,247,244,0.8); padding-left: 16px; position: relative; }
.prereq-list li::before { content: '→'; position: absolute; left: 0; color: var(--iitg-gold); }

/* ═══════════════════════════════════════
   SCHEDULE
   ═══════════════════════════════════════ */
.schedule { background: var(--cream); }
.sched-note {
  text-align: center; font-size: 0.78rem;
  color: var(--muted); margin-bottom: 28px;
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
}
.sn-sep { color: var(--border); }
.sched-wrap {
  overflow-x: auto;
  border-radius: 12px; border: 1px solid var(--border);
  box-shadow: 0 4px 28px rgba(26,54,104,0.08);
}
.sched-table {
  width: 100%; border-collapse: collapse;
  background: white; min-width: 820px; font-size: 0.8rem;
}
.sched-table thead { background: var(--iitg-navy); }
.sched-table thead th {
  padding: 13px 14px; color: rgba(255,255,255,0.85);
  font-family: var(--font-mono); font-size: 0.67rem;
  letter-spacing: 0.08em; text-align: left; font-weight: 400;
}
.sched-table thead .th-day { color: var(--iitg-gold); }
.sched-table tbody tr { border-bottom: 1px solid var(--border); }
.sched-table tbody tr:last-child { border-bottom: none; }
.sched-table tbody tr:hover { background: rgba(227,242,253,0.35); }
.sched-table td { padding: 13px 14px; vertical-align: top; }
.td-day { font-weight: 800; font-size: 0.76rem; color: var(--iitg-navy); white-space: nowrap; }
.td-date { font-size: 0.72rem; color: var(--muted); white-space: nowrap; }
.tt, .tl, .tv {
  display: inline-block; padding: 3px 8px;
  border-radius: 4px; font-size: 0.72rem; font-weight: 700;
  line-height: 1.3; margin-bottom: 3px;
}
.tt { background: var(--acm-light); color: var(--acm-dark); }
.tl { background: rgba(181,39,43,0.09); color: var(--iitg-red); }
.tv { background: rgba(200,146,59,0.15); color: #7a5500; }
.ts { display: block; font-size: 0.7rem; color: var(--muted); margin-top: 3px; font-family: var(--font-mono); }
.day-off-row { background: rgba(248,247,244,0.9); }
.day-off-cell { text-align: center; color: var(--muted); font-weight: 600; padding: 18px; }
.sched-legend {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border);
}
.sl-item { display: flex; align-items: center; }
.sl-note { font-size: 0.7rem; color: var(--muted); margin-left: auto; font-family: var(--font-mono); }

/* ═══════════════════════════════════════
   SPEAKERS
   ═══════════════════════════════════════ */
.speakers { background: var(--paper); }
.spk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.spk-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 14px; overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
  display: flex; flex-direction: column;
  position: relative;
}
.spk-card:hover { transform: translateY(-5px); box-shadow: 0 16px 40px rgba(26,54,104,0.13); }

/* Coordinator highlight */
.coord-highlight { border-top: 3px solid var(--acm-blue); }
.coord-ribbon-tag {
  background: var(--acm-blue);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;

  padding: 5px 14px;
  text-align: center;

  height: 30px;              /* ✅ ADD THIS */
  display: flex;             /* ✅ ADD THIS */
  align-items: center;       /* ✅ ADD THIS */
  justify-content: center;   /* ✅ ADD THIS */
}
/* External card */
.ext-card { border-top: 3px solid var(--iitg-gold); }
.ext-ribbon-tag {
  background: var(--iitg-gold); color: white;
  font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 5px 14px; text-align: center;
}
.ext-badge-sm {
  background: rgba(200,146,59,0.15); color: #7a5500;
  font-size: 0.62rem; padding: 1px 6px; border-radius: 4px;
  vertical-align: middle;
}

/* Avatar */
.spk-photo-wrap {
  padding: 24px 24px 0; display: flex; justify-content: center;
}
.spk-avatar {
  width: 90px; height: 90px; border-radius: 50%;
  overflow: hidden; flex-shrink: 0;
  box-shadow: 0 4px 18px rgba(0,0,0,0.18);
}
.spk-avatar svg { width: 100%; height: 100%; display: block; }

/* Avatar color variants */
.av-blue    { background: linear-gradient(135deg, #0277BD, #01579B); }
.av-teal    { background: linear-gradient(135deg, #00796B, #004D40); }
.av-navy    { background: linear-gradient(135deg, #1A3668, #0d2145); }
.av-indigo  { background: linear-gradient(135deg, #3949AB, #1A237E); }
.av-rust    { background: linear-gradient(135deg, #B5272B, #7f191c); }
.av-gold    { background: linear-gradient(135deg, #C8923B, #8a6020); }

/* Speaker body */
.spk-body { padding: 16px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.spk-name { letter-spacing: 0.02em;font-weight: 600;font-size: 1rem; color: var(--iitg-navy); margin-bottom: 4px; line-height: 1.25; }
.spk-affil { font-size: 0.7rem; color: var(--muted); margin-bottom: 10px; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.spk-topic-badge {
  display: inline-block;
  background: var(--acm-light); color: var(--acm-dark);
  font-size: 0.72rem; font-weight: 700;
  padding: 4px 10px; border-radius: 5px;
  margin-bottom: 12px;
}
.ext-card .spk-topic-badge { background: rgba(200,146,59,0.12); color: #7a5500; }
.spk-bio {
  font-size: 0.84rem; line-height: 1.65;
  color: #3d4a5c; margin-bottom: 14px; flex: 1;
}
.bio-note { font-size: 0.72rem; color: var(--muted); font-style: italic; }
.spk-link {
  font-family: var(--font-mono); font-size: 0.76rem;
  color: var(--acm-blue); font-weight: 500;
  transition: color 0.2s; margin-top: auto;
}
.spk-link:hover { color: var(--iitg-navy); text-decoration: underline; }

/* ═══════════════════════════════════════
   INFO
   ═══════════════════════════════════════ */
.info-sec { background: var(--cream); }
.info-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 22px; }
.info-card {
  border-radius: 12px; padding: 28px 24px;
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.info-card:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(26,54,104,0.1); }
.ic-blue { background: var(--acm-light); border-color: rgba(2,119,189,0.2); }
.ic-red  { background: rgba(181,39,43,0.06); border-color: rgba(181,39,43,0.18); }
.ic-gold { background: rgba(200,146,59,0.08); border-color: rgba(200,146,59,0.25); }
.ic-dark { background: var(--iitg-navy); color: white; }
.ic-ico { font-size: 1.7rem; margin-bottom: 12px; }
.info-card h3 { font-size: 1rem; font-weight: 800; color: var(--iitg-navy); margin-bottom: 12px; }
.ic-dark h3 { color: var(--iitg-gold); }
.info-card ul { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.info-card ul li { font-size: 0.86rem; padding-left: 14px; position: relative; color: #374151; }
.info-card ul li::before { content: '·'; position: absolute; left: 0; color: var(--acm-blue); font-size: 1.1rem; line-height: 1.4; }
.ic-dark ul li { color: rgba(255,255,255,0.8); }
.info-card p { font-size: 0.86rem; line-height: 1.65; color: rgba(255,255,255,0.8); margin-bottom: 14px; }
.clink {
  display: block; font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--iitg-gold-light); margin-bottom: 5px;
  transition: color 0.2s;
}
.clink:hover { color: white; }

/* ═══════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════ */
.footer { background: black/*var(--iitg-navy)*/; color: white; }
.footer-top { max-width: 1180px; margin: 0 auto; padding: 56px 32px 36px; }
.footer-brand-row {
  display: flex; align-items: center; gap: 20px;
  margin-bottom: 16px; padding-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-logo { height: 48px; width: auto; object-fit: contain; filter: brightness(1.05); }
.footer-acm { display: flex; align-items: center; gap: 12px; }
.footer-acm-box {
  background: var(--iitg-red); color: white;
  font-family: var(--font-sans); font-weight: 900; font-size: 1rem;
  padding: 5px 12px; border-radius: 5px; letter-spacing: 0.06em;
}
.footer-acm-t1 { font-size: 0.9rem; font-weight: 700; }
.footer-acm-t2 { font-size: 0.68rem; color: rgba(255,255,255,0.5); }
.footer-tagline {
  font-size: 0.95rem; color: rgba(255,255,255,0.65);
  line-height: 1.6; margin-bottom: 40px;
}
.footer-cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
.fc-h { font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--iitg-gold); margin-bottom: 12px; display: block; }
.fcol p { font-size: 0.86rem; line-height: 1.75; color: rgba(255,255,255,0.65); }
.fcol a { display: block; font-size: 0.86rem; color: rgba(255,255,255,0.6); line-height: 1.85; transition: color 0.2s; }
.fcol a:hover { color: var(--iitg-gold-light); }
.footer-bottom {
  max-width: 1180px; margin: 0 auto;
  padding: 18px 32px 24px;
  border-top: 1px solid rgba(255,255,255,0.07);
  font-size: 0.72rem; color: rgba(255,255,255,0.3);
}

/* ═══════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */
@media (max-width: 960px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: fixed; top: 66px; left: 0; right: 0;
    background: var(--paper); padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 40px rgba(0,0,0,0.1); gap: 2px;
  }
  .hamburger { display: flex; }
  .about-grid { grid-template-columns: 1fr; }
  .clst-inner { grid-template-columns: 1fr; }
  .clst-img-col { flex-direction: row; align-items: center; gap: 24px; flex-wrap: wrap; }
  .clst-big-logo { max-width: 160px; margin: 0; }
  .topics-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .hero-deco-right { display: none; }
}
@media (max-width: 640px) {
  :root { --section-pad: 64px; }
  .container { padding: 0 18px; }
  .nav-inner { padding: 0 18px; }
  .hero-content { padding: 56px 18px 64px; }
  .about-stats { flex-wrap: wrap; gap: 16px; }
  .footer-cols { grid-template-columns: 1fr; gap: 24px; }
  .hero-meta { flex-direction: column; align-items: flex-start; gap: 12px; }
  .hmsep { display: none; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .clst-pillars { grid-template-columns: 1fr; }
  .spk-grid { grid-template-columns: 1fr; }
}
.spk-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  overflow: hidden;

  margin: 15px auto 15px auto;   /* centered + slightly lowered */
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;

  /* optional polish */
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.spk-photo-actual {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.coord-ribbon-tag.invisible {
  visibility: hidden;
  background: transparent !important;
  padding: 0;
}
.acm-logo {
  height: 60px;   /* slightly smaller than CLST */
  width: auto;
  margin-left: 8px;
  border-left: 1px solid var(--border);
  padding-left: 10px;
}





/* === MINIMAL PREMIUM POLISH (SAFE) === */

/* 1. Better easing for existing transitions */
.spk-card,
.info-card,
.btn-primary,
.nav-links a {
  transition: transform 0.3s cubic-bezier(0.22,1,0.36,1),
              box-shadow 0.3s cubic-bezier(0.22,1,0.36,1),
              background 0.2s ease;
}

/* 2. Slightly improved card hover */
.spk-card:hover,
.info-card:hover {
  transform: translateY(-4px); /* was -5px */
  box-shadow: 0 12px 30px rgba(26,54,104,0.14); /* softer */
}

/* 3. Button polish (no shimmer, just cleaner) */
.btn-primary {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(2,119,189,0.25);
}

/* 4. Navbar slight refinement (very subtle) */
.nav {
  background: rgba(248,247,244,0.9); /* was 0.94 */
}

/* 5. Slight text polish */
.body-text {
  color: #2f3a4a; /* softer than current */
}

/* 6. Pillar hover refinement */
.pillar:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(2,119,189,0.1);
}

/* 7. Smooth image rendering */
.nav-logo,
.ac-logo {
  filter: contrast(1.03);
}
/* ═══════════════════════════════
   MOBILE RESPONSIVE (≤768px)
   ═══════════════════════════════ */

@media (max-width: 768px) {

  /* Container padding */
  .container {
    padding: 0 16px;
  }

  /* NAV */
  .nav-inner {
    height: 60px;
  }

  .nav-links {
    position: absolute;
    top: 60px;
    right: 0;
    background: white;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
    display: none;
  }

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

  .hamburger {
    display: block;
  }

  /* HERO */
  .hero-content {
    padding: 80px 16px 40px;
  }
/*
  .hero-title {
	font-family : 'Inter', sans-serif;
	font-weight: 700;
	letter-spacing: -0.02em;
    font-size: 2rem;
    line-height: 1.2;
  }*/
  .hero-title {
  font-family: 'Playfair Display', serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.hero-title .italic {
  font-style: italic;
  font-weight: 500;
}

  .hero-chips {
    flex-wrap: wrap;
    gap: 6px;
  }

  .hero-meta {
    flex-direction: column;
    gap: 12px;
  }

  /* ABOUT SECTION */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  /* SPEAKERS GRID */
  .spk-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* INFO GRID */
  .info-grid {
    grid-template-columns: 1fr;
  }

  /* FOOTER */
  .footer-cols {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-brand-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}
.hline {
  display: block;
}
.ic-divider {
  height: 1px;
  background: rgba(255,255,255,0.1);
  margin: 14px 0;
}
.ic-cta {
  display: block;
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 6px;
  padding: 8px 12px;
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s;
}
.ic-cta:hover {
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.35);
}


.announcement-banner {
  width: 100%;
  /*background: linear-gradient(90deg, #b55600 0%, #c88600 35%, #e6a817 50%, #c88600 65%, #b55600 100%);*/
  background: linear-gradient(90deg, #5c1111 0%, #c88600 35%, #5c1111 50%, #c88600 65%, #5c1111 100%);
  color: #f4d58d;
  font-family: 'DM Mono', 'Courier New', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  overflow: hidden;
  white-space: nowrap;
  padding: 1.5px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(0,0,0,0.25);
  position: sticky;
  top: 60px;
  z-index: 999;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
}

.announcement-track {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  animation: marquee-scroll 38s linear infinite;
  will-change: transform;
}

.announcement-banner:hover .announcement-track {
  animation-play-state: paused;
}

.announcement-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  opacity: 0.95;
  font-weight: 500;
}

.ann-badge {
  background: rgba(0,0,0,0.12);
  border: 1px solid rgba(0,0,0,0.15);
  border-radius: 4px;
  padding: 1px 7px;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
  font-weight: 600;
}

.ann-sep {
  opacity: 0.4;
  font-size: 1rem;
  margin: 0 4px;
}

@keyframes marquee-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}