/* ============================================================
   AALAC Workshop · Cybersecurity & Privacy in the Age of AI
   Single-page static site. No framework. GitHub Pages ready.
   ============================================================ */

:root {
  /* Palette — Swarthmore-inspired garnet on warm parchment */
  --bg:        #F8F5F0;        /* warm off-white */
  --bg-muted:  #F0EBE3;        /* slightly darker section */
  --bg-dark:   #1B1612;        /* deep ink */
  --ink:       #1B1612;
  --ink-soft:  #4A4039;
  --ink-mute:  #847B72;
  --line:      #E0D8CC;
  --line-soft: #EBE4D9;

  --accent:        #8B1A1A;    /* garnet */
  --accent-deep:   #6B1212;
  --accent-soft:   #B14545;

  /* Type */
  --serif: "Fraunces", ui-serif, Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Sizing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --container-max: 1180px;
  --radius: 6px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 18px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-family: var(--serif); font-weight: 500; letter-spacing: -0.01em; }
p { margin: 0; }

::selection { background: var(--accent); color: var(--bg); }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.section {
  padding: clamp(3rem, 6vw, 5rem) 0;
}
.section--bordered { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section--muted { background: var(--bg-muted); }
.section--tight { padding: clamp(3rem, 6vw, 5rem) 0; }
.section-title--tight { margin-bottom: var(--space-8); }

.section-label {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-4);
}
.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.15;
  color: var(--ink);
  max-width: 28ch;
}
.section-title--center {
  margin-left: auto; margin-right: auto;
  text-align: center;
  margin-bottom: var(--space-8);
  max-width: none;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 245, 240, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-6);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--ink);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.brand-logo {
  height: 44px;
  width: auto;
  display: block;
}
.brand-divider-vert {
  display: inline-block;
  width: 1px;
  height: 22px;
  background: var(--line);
}
.brand-text { color: var(--ink); white-space: nowrap; }
.brand-text-soft { color: var(--ink-mute); }
@media (max-width: 720px) {
  .brand-divider-vert, .brand-text { display: none; }
  .brand-logo { height: 36px; }
}
.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
  font-size: 14px;
}
.site-nav a {
  color: var(--ink-soft);
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}
.site-nav a:hover { color: var(--accent); }
.site-nav a::after {
  content: ""; position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.25s ease;
}
.site-nav a:hover::after { transform: scaleX(1); }

/* Regular nav links */
.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 3px;
  font-weight: 500;
  line-height: 1;
  color: inherit;
  text-decoration: none;
}

.nav-cta {
  background: var(--accent);
  color: var(--bg) !important;
  padding: 8px 14px;
  border-radius: 3px;
  font-weight: 500;
  transition: background 0.2s;
}
.nav-cta:hover { background: var(--accent-deep); }
.nav-cta::after { display: none; }

@media (max-width: 720px) {
  .site-nav a:not(.nav-cta) { display: none; }
}
@media (max-width: 480px) {
  .nav-cta { padding: 6px 10px; font-size: 13px; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 0 0 clamp(2.5rem, 6vw, 4.5rem);
  overflow: hidden;
  isolation: isolate;
}
.hero-image {
  width: 100%;
  height: clamp(280px, 42vw, 480px);
  background-image:
    linear-gradient(180deg, rgba(0,0,0,0.0) 60%, rgba(248, 245, 240, 1) 100%),
    url('assets/amphitheater.jpg');
  background-size: cover, cover;
  background-position: center 45%, center 45%;
  background-repeat: no-repeat;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}
.hero-inner {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  text-align: center;
}
.eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-4);
}
.hero-title {
  font-size: clamp(2rem, 4.2vw, 3.25rem);
  line-height: 1;
  letter-spacing: -0.03em;
  font-weight: 500;
  margin-bottom: var(--space-3);
}
.hero-accent {
  color: var(--accent);
  font-weight: 500;
}
.hero-expansion {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 1.8vw, 1.5rem);
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--ink);
  max-width: none;
  width: 100%;
  margin: 0 auto var(--space-5);
  padding: 0 1rem var(--space-5);
  border-bottom: 1px solid var(--line);
  text-align: center;
  text-wrap: balance;
  display: block;
}
.hero-expansion em {
  font-style: italic;
  color: var(--accent);
}
.hero-lede {
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 64ch;
  margin: 0 auto var(--space-6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  justify-content: center;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-top: var(--space-5);
  border-top: 1px solid var(--line);
  justify-content: center;
}
.meta-item { display: flex; flex-direction: column; gap: 4px; align-items: center; text-align: center; }
.meta-label {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-mute);
}
.meta-value {
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--ink);
}

/* ---------- About / Two-column ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}
@media (max-width: 820px) {
  .two-col { grid-template-columns: 1fr; }
}
.col-narrow .section-title { margin-bottom: 0; }
.prose {
  max-width: 80ch;
}
.prose p {
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 80ch;
}
.prose p + p { margin-top: var(--space-4); }
.prose--center { margin-left: auto; margin-right: auto; text-align: center; }
.prose--center p { max-width: none; }

/* ---------- Goals ---------- */
.goals-list {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 78ch;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.goals-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
}
.goals-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- Schedule meta strip ---------- */
.schedule-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(2rem, 6vw, 5rem);
  padding: var(--space-8) clamp(1.5rem, 4vw, 3rem);
  margin-bottom: clamp(3rem, 6vw, 5rem);
  background: var(--bg-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
}
.schedule-meta-item { display: flex; flex-direction: column; gap: 4px; }
.meta-tba {
  font-style: italic;
  color: var(--accent);
}

/* ---------- Schedule CTA below schedule ---------- */
.schedule-cta {
  margin-top: clamp(3rem, 6vw, 5rem);
  padding: clamp(2rem, 5vw, 3rem);
  background: var(--bg-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
}
.schedule-cta p {
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--ink);
  margin-bottom: var(--space-6);
}

/* ---------- Agenda / Schedule ---------- */
.day-jump {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin: calc(-1 * var(--space-6)) 0 var(--space-10);
}
.day-jump a {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.day-jump a:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
html { scroll-behavior: smooth; }
#day-1, #day-2 { scroll-margin-top: 80px; }

.day {
  border-top: 1px solid var(--line);
  padding-top: clamp(1.25rem, 3vw, 2rem);
  margin-top: clamp(1.25rem, 3vw, 2rem);
}
.day:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.day-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.day-tag {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
}
.day-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--ink);
}
.schedule {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.schedule li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
  transition: background-color 0.15s ease;
}
.schedule li:nth-child(even) {
  background: rgba(139, 26, 26, 0.025);
}
.schedule li:hover {
  background: rgba(139, 26, 26, 0.06);
}
.schedule li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--accent);
  transition: width 0.15s ease;
}
.schedule li:hover::before {
  width: 3px;
}
.schedule li:last-child { border-bottom: none; }
.time {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--accent);
  padding-top: 1px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.block h4 {
  font-family: var(--sans);
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 1px;
  letter-spacing: -0.005em;
}
.optional-tag {
  display: inline-block;
  margin-left: var(--space-2);
  padding: 2px 8px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(139, 26, 26, 0.08);
  border-radius: 3px;
  vertical-align: middle;
}
.block p {
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 65ch;
  margin: 0;
}
@media (max-width: 640px) {
  .schedule li { grid-template-columns: 1fr; gap: 6px; }
  .time { padding-top: 0; }
}

/* ---------- Organizers ---------- */
.organizers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.25rem, 2.5vw, 2rem);
}
@media (max-width: 900px) { .organizers { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .organizers { grid-template-columns: 1fr; } }
.organizers li {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.organizer-photo {
  width: 150px;
  height: 150px;
  max-width: 150px;
  min-width: 150px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin: 0 auto var(--space-5);
  border: 1px solid var(--line);
  background: var(--bg-muted, #f0ece4);
  flex-shrink: 0;
}
.organizers h3 {
  font-size: 1.25rem;
  color: var(--ink);
  margin-bottom: 4px;
}
.organizers h3 a {
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 100% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-image: linear-gradient(var(--line), var(--line));
  transition: background-image 0.2s, color 0.2s;
}
.organizers h3 a:hover {
  color: var(--accent);
  background-image: linear-gradient(var(--accent), var(--accent));
}
.organizers .role {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 4px;
}
.organizers .affil {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 0;
}
.email-link {
  font-size: 13px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
  word-break: break-all;
}
.email-link:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Contact ---------- */
.contact-block {
  text-align: center;
  max-width: 720px;
}
.contact-block .section-label { display: block; }
.contact-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: var(--space-4) 0 var(--space-6);
}
.contact-text {
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: var(--space-12);
}
.cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.01em;
  padding: 14px 26px;
  border-radius: 3px;
  transition: background 0.2s, transform 0.2s, color 0.2s, border-color 0.2s;
  border: 1px solid transparent;
}
.cta--primary {
  background: var(--accent);
  color: var(--bg);
}
.cta--primary:hover { background: var(--accent-deep); transform: translateY(-1px); }
.cta--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.cta--ghost:hover { border-color: var(--accent); color: var(--accent); }
.cta svg { transition: transform 0.2s; }
.cta:hover svg { transform: translateX(3px); }

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-dark);
  color: rgba(248, 245, 240, 0.75);
  padding: var(--space-16) 0 var(--space-12);
  margin-top: 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.footer-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--bg);
  margin: 0;
}
.footer-sub {
  font-size: 14px;
  color: rgba(248, 245, 240, 0.55);
  margin: 0;
}
.footer-host {
  font-size: 13px;
  color: rgba(248, 245, 240, 0.55);
  margin: 0;
}
.footer-right {
  text-align: right;
  font-size: 13px;
  color: rgba(248, 245, 240, 0.55);
  line-height: 1.7;
}
.footer-build {
  margin: 0;
  font-family: var(--serif);
  font-style: italic;
  color: rgba(248, 245, 240, 0.45);
}
@media (max-width: 600px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-right { text-align: left; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}