/* ==========================================================================
   MindScapeS Frontier Talk Series on Cognition - University of Delhi
   Comprehensive Responsive Academic Design System
   ========================================================================== */

/* ===== 1. COLORS & CSS VARIABLES ===== */
:root {
  --bg-color: #fdfcfb;
  --bg-surface: #ffffff;
  --text-color: #1a1917;
  --text-muted: #57534e;
  --text-light: #78716c;
  --accent-color: #0c2340; /* Oxford / Deep Academic Navy */
  --accent-hover: #17365d;
  --accent-gold: #b45309;  /* Terracotta / Amber accent */
  --accent-gold-hover: #92400e;
  --border-color: #e5e0d8;
  --border-dark: #b8b2a7;
  --card-bg: #f9f8f5;
  --badge-bg: #eef3f8;
  --badge-border: #ccd8e4;
  --comment-bg: #f5efe6;
  --comment-border: #d8c7af;
  --zoom-bg: #f2f7fc;
  --zoom-border: #1c528a;
  --font-serif: "Georgia", "Times New Roman", "Newsreader", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --line-height: 1.62;
  --content-width: 820px;
  --wide-width: 1120px;
}

/* ===== 2. RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: clamp(16px, 0.35vw + 15px, 18px);
  background-color: var(--bg-color);
  color: var(--text-color);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-serif);
  line-height: var(--line-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow-x: hidden;
  width: 100%;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: normal;
  color: var(--text-color);
  line-height: 1.25;
  margin: 1.8rem 0 0.8rem;
}

h1 {
  font-size: clamp(1.8rem, 3.2vw + 1rem, 2.45rem);
  letter-spacing: -0.015em;
}

h2 {
  font-size: clamp(1.35rem, 1.8vw + 0.8rem, 1.65rem);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.45rem;
}

h3 {
  font-size: clamp(1.15rem, 1.2vw + 0.75rem, 1.3rem);
}

p, ul, ol, dl, blockquote {
  margin: 0 0 1.25rem;
}

a {
  color: var(--accent-color);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease, opacity 0.15s ease;
}

a:hover {
  color: var(--accent-gold);
}

.subtext {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  line-height: 1.5;
}

.lead {
  font-size: clamp(1.06rem, 1.1vw + 0.88rem, 1.22rem);
  line-height: 1.6;
  color: #2b2926;
  margin-bottom: 1.35rem;
}

.skip-link {
  position: absolute;
  top: -999px;
  left: 1rem;
  background: var(--text-color);
  color: #ffffff;
  padding: 0.5rem 1rem;
  z-index: 3000;
  font-family: var(--font-sans);
  border-radius: 2px;
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

/* ===== 3. LAYOUT & CONTAINERS ===== */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-wide {
  width: 100%;
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main {
  padding: 2.25rem 0 4.5rem;
}

/* ===== 4. SITE HEADER & NAVIGATION ===== */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background: #ffffff;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
}

.header-top {
  padding: 0.95rem 0 0.8rem;
  border-bottom: 1px solid #f0ece5;
}

.header-top-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.site-title {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 1.4vw + 0.85rem, 1.38rem);
  margin: 0;
  line-height: 1.25;
}

.site-title a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: normal;
}

.site-title strong {
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #081729;
}

.host-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 0.28rem 0.65rem;
  border-radius: 3px;
  font-weight: 500;
  white-space: nowrap;
}

.nav-bar {
  padding: 0.45rem 0;
  background: #ffffff;
}

.nav-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
}

.main-nav li a {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
  text-decoration: none;
  padding: 0.45rem 0.85rem;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.main-nav li a:hover {
  color: var(--accent-color);
  background: var(--card-bg);
}

.main-nav li a.active {
  color: var(--accent-color);
  background: #eef3f8;
  font-weight: 700;
}

.header-cta {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.btn-register-header {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: var(--accent-gold);
  color: #ffffff !important;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none !important;
  padding: 0.45rem 1rem;
  border-radius: 4px;
  letter-spacing: 0.02em;
  box-shadow: 0 1px 4px rgba(180, 83, 9, 0.2);
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.btn-register-header:hover {
  background-color: var(--accent-gold-hover);
  color: #ffffff !important;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  color: var(--text-color);
}

/* ===== 5. PAGE HEADERS & HEROES ===== */
.page-hero {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.page-hero-badge {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  color: var(--accent-color);
  padding: 0.25rem 0.65rem;
  border-radius: 3px;
  margin-bottom: 0.6rem;
}

.page-hero-title {
  margin: 0.25rem 0 0.65rem;
  font-size: clamp(2rem, 3.5vw + 1rem, 2.65rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: #0a1b2e;
}

.page-hero-lead {
  font-size: clamp(1.05rem, 1.1vw + 0.88rem, 1.2rem);
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

/* Home Spotlight Hero */
.spotlight-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-left: 5px solid var(--accent-gold);
  border-radius: 6px;
  padding: 2rem 2.25rem;
  margin: 2.25rem 0 3rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.spotlight-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.spotlight-badge {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
  padding: 0.25rem 0.65rem;
  border-radius: 3px;
}

.spotlight-time {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-color);
}

.spotlight-title {
  font-size: clamp(1.45rem, 2vw + 1rem, 1.95rem);
  margin: 0.2rem 0 0.75rem;
  font-weight: 700;
  line-height: 1.3;
}

.spotlight-title a {
  color: var(--text-color);
  text-decoration: none;
}

.spotlight-title a:hover {
  color: var(--accent-color);
}

.spotlight-speaker {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 0.4rem;
}

.spotlight-affil {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.spotlight-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

/* ===== 6. CARDS & GRIDS ===== */
.session-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.85rem 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.session-card.completed {
  background: #fafaf8;
  border-color: #e5e2da;
}

.session-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.status-badge {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
}

.status-badge.upcoming {
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #bae6fd;
}

.status-badge.completed {
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #e2e8f0;
}

.session-title {
  font-size: clamp(1.3rem, 1.8vw + 0.8rem, 1.6rem);
  margin: 0.25rem 0 0.65rem;
  font-weight: 700;
  line-height: 1.32;
}

.session-speaker-line {
  font-family: var(--font-sans);
  font-size: 0.98rem;
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.session-commentator-line {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: #5c4217;
  font-weight: 500;
  margin-bottom: 0.85rem;
}

/* Speaker Grid & Profile Cards */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 350px));
  gap: 2rem;
  margin: 2rem 0 3.5rem;
}

.speaker-profile-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 350px;
}

.speaker-avatar-wrap {
  width: 100%;
  height: 270px;
  max-height: 270px;
  background: #f3f0e9;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.speaker-avatar-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
}

.speaker-monogram {
  font-family: var(--font-serif);
  font-size: 3.25rem;
  font-weight: 700;
  color: var(--accent-color);
  letter-spacing: -0.02em;
  background: #eef3f8;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #ccd8e4;
}

.speaker-card-body {
  padding: 1.4rem 1.6rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.speaker-role-pill {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--badge-bg);
  color: var(--accent-color);
  border: 1px solid var(--badge-border);
  padding: 0.22rem 0.55rem;
  border-radius: 3px;
  margin-bottom: 0.65rem;
}

.speaker-role-pill.commentator {
  background: var(--comment-bg);
  color: #5c4217;
  border-color: var(--comment-border);
}

.speaker-name {
  font-size: 1.35rem;
  margin: 0 0 0.3rem;
  font-weight: 700;
  color: #0c1a2e;
}

.speaker-affiliation {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.45;
}

.speaker-talk-topic {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: #1e293b;
  background: var(--card-bg);
  border-left: 3px solid var(--accent-color);
  padding: 0.5rem 0.75rem;
  margin-top: auto;
  border-radius: 0 3px 3px 0;
}

/* ===== 7. READING LIST & CITATION CARDS ===== */
.reading-module {
  margin-bottom: 3rem;
}

.reading-module-header {
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

.reading-module-header h3 {
  margin: 0 0 0.3rem;
  font-size: 1.35rem;
}

.reading-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.4rem 1.75rem;
  margin-bottom: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.02);
}

.reading-details {
  flex: 1;
  min-width: 280px;
}

.reading-citation {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  line-height: 1.5;
  color: var(--text-color);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.reading-context {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 0;
}

/* ===== 8. BUTTONS & UI CONTROLS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background-color: var(--accent-color);
  color: #ffffff !important;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 0.7rem 1.45rem;
  text-decoration: none !important;
  border: 1px solid var(--accent-color);
  border-radius: 4px;
  cursor: pointer;
  line-height: 1.3;
  font-weight: 600;
  min-height: 44px;
  transition: all 0.15s ease;
}

.btn:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-gold {
  background-color: var(--accent-gold);
  border-color: var(--accent-gold);
}

.btn-gold:hover {
  background-color: var(--accent-gold-hover);
  border-color: var(--accent-gold-hover);
}

.btn-zoom {
  background-color: #1e5a96;
  border-color: #1e5a96;
  color: #ffffff !important;
}

.btn-zoom:hover {
  background-color: #154270;
  border-color: #154270;
  color: #ffffff !important;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background-color: transparent;
  color: var(--text-color) !important;
  border: 1px solid var(--border-dark);
  padding: 0.65rem 1.25rem;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  text-decoration: none !important;
  border-radius: 4px;
  min-height: 44px;
  font-weight: 500;
  transition: all 0.15s ease;
}

.btn-secondary:hover {
  background-color: var(--card-bg);
  border-color: var(--text-color);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
  min-height: 38px;
}

/* ===== 9. FORMS & REGISTRATION BOX ===== */
.reg-card {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: 6px;
  padding: 2.25rem 2.5rem;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.04);
}

.form-group {
  margin-bottom: 1.35rem;
}

label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
  color: var(--text-color);
  font-weight: 600;
}

input[type="text"], input[type="email"], select, textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-family: var(--font-serif);
  font-size: 16px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  background: #ffffff;
  color: var(--text-color);
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent-gold);
  outline: 2px solid var(--accent-gold);
  outline-offset: 1px;
}

.reg-confirm-box {
  background: #f0f7f3;
  border: 1px solid #c2dfcf;
  padding: 1.75rem 2rem;
  font-family: var(--font-sans);
  font-size: 0.96rem;
  border-radius: 6px;
}

.reg-confirm-box h3 {
  font-family: var(--font-sans);
  font-size: 1.35rem;
  color: #1e5631;
  margin-top: 0;
  font-weight: 700;
}

/* ===== 10. CALLOUTS & INFO BOXES ===== */
.info-box {
  background: var(--card-bg);
  border-left: 4px solid var(--accent-color);
  padding: 1.4rem 1.75rem;
  margin: 2rem 0;
  border-radius: 0 4px 4px 0;
}

.mailing-callout {
  background: #fbf8f2;
  border: 1px solid #e9dfcf;
  border-left: 4px solid var(--accent-gold);
  padding: 1.4rem 1.75rem;
  margin: 2.75rem 0;
  border-radius: 0 4px 4px 0;
}

/* FAQ Accordion / Cards */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 2rem 0;
}

.faq-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.4rem 1.75rem;
}

.faq-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--accent-color);
}

.faq-card p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.94rem;
  color: var(--text-color);
  line-height: 1.6;
}

/* ===== 11. FOOTER ===== */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 3.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-muted);
  background: #ffffff;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-col {
  flex: 1;
  min-width: 240px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent-color);
  text-decoration: underline;
}

/* ==========================================================================
   12. COMPREHENSIVE RESPONSIVE DESIGN (Phone, iPad, Laptop, Desktop)
   ========================================================================== */

/* --- A. Tablets & iPads (Portrait & Landscape <= 1024px) --- */
@media (max-width: 1024px) {
  .container-wide {
    max-width: 100%;
    padding: 0 1.5rem;
  }

  .speakers-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 340px));
    justify-content: center;
    gap: 1.5rem;
  }
}

/* --- B. Tablets & Small Laptops (<= 860px) --- */
@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.85rem;
    font-size: 0.95rem;
    cursor: pointer;
  }

  .nav-bar-inner {
    flex-wrap: wrap;
    align-items: center;
  }

  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    padding: 0.85rem 0 0.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: 0.65rem;
  }

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

  .main-nav li a {
    padding: 0.75rem 1rem;
    width: 100%;
    border-radius: 4px;
    background: #faf8f5;
  }

  .main-nav li a:hover,
  .main-nav li a.active {
    background: #f0eade;
  }

  .header-cta {
    margin-left: auto;
  }
}

/* --- C. Phones & Phablets (<= 640px) --- */
@media (max-width: 640px) {
  html {
    font-size: 16px;
  }

  /* Prevent automatic unwanted zoom in iOS Safari */
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="url"],
  input[type="number"],
  select,
  textarea {
    font-size: 16px !important;
  }

  .container, .container-wide {
    padding: 0 1rem;
  }

  /* Header adjustments */
  .site-header {
    padding-bottom: 0.25rem;
  }

  .header-top-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    padding: 0.85rem 0 0.65rem;
  }

  .site-title {
    font-size: 1.45rem;
    line-height: 1.22;
  }

  .host-tag {
    font-size: 0.8rem;
  }

  .btn-register-header {
    padding: 0.4rem 0.75rem;
    font-size: 0.82rem;
  }

  /* Hero */
  .page-hero {
    padding: 1.75rem 0 1.25rem;
  }

  .page-hero-title {
    font-size: 1.65rem;
    line-height: 1.25;
  }

  .page-hero-lead {
    font-size: 0.95rem;
    line-height: 1.55;
  }

  /* Cards */
  .spotlight-card {
    padding: 1.25rem 1.15rem;
  }

  .spotlight-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
  }

  .spotlight-actions .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .mailing-callout {
    padding: 1.15rem 1.15rem;
    margin: 2rem 0;
  }

  .reg-card {
    padding: 1.4rem 1.15rem;
  }

  .reading-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 1.25rem 1.15rem;
  }

  /* Speakers Grid single column centered */
  .speakers-grid {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 1.75rem;
    margin: 1.5rem 0 2.5rem;
  }

  .speaker-profile-card {
    max-width: 100%;
    width: 100%;
  }

  .speaker-avatar-wrap {
    height: 250px;
    max-height: 250px;
  }

  /* Footer stack */
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.75rem;
  }

  .footer-col {
    text-align: left !important;
    width: 100%;
  }

  .footer-links {
    justify-content: flex-start !important;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
  }
}

/* --- D. Compact Phones (<= 420px: iPhone SE, etc.) --- */
@media (max-width: 420px) {
  .site-title {
    font-size: 1.3rem;
  }

  .programme-title {
    font-size: 1.6rem;
  }

  .btn-table-outline,
  .btn-table-primary,
  .btn-table-zoom {
    max-width: 95px;
    padding: 6px 6px;
    font-size: 0.78rem;
  }

  .abstract-modal {
    padding: 1.4rem 1rem !important;
  }
}

/* ===== PROGRAMME TABLE & SCHEDULE ALIGNMENT ===== */
.programme-section {
  margin-bottom: 4rem;
}

.programme-header {
  margin-bottom: 1.5rem;
}

.programme-title {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 2.8vw, 2.4rem);
  font-weight: 500;
  color: #1a1917;
  margin: 0 0 0.5rem 0;
  border-bottom: none;
  padding-bottom: 0;
  letter-spacing: -0.01em;
}

.programme-subtitle {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: #57534e;
  line-height: 1.55;
  margin: 0;
  max-width: 960px;
}

.programme-table-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: #ffffff;
  border: 1px solid #dcd7ce;
  border-radius: 4px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
  margin-top: 1.25rem;
}

.programme-table {
  width: 100%;
  min-width: 960px;
  border-collapse: collapse;
  text-align: left;
  font-family: var(--font-serif);
}

.programme-table thead th {
  padding: 14px 18px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 700;
  color: #1a2a3a;
  border-bottom: 1px solid #d0c9bd;
  border-right: 1px solid #dcd7ce;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.programme-table thead th:last-child {
  border-right: none;
}

/* Header Pastel Tinting matching the reference demo */
.programme-table thead th.col-date {
  background-color: #dce5ee; /* Soft slate/blue */
  width: 18%;
}

.programme-table thead th.col-speaker {
  background-color: #f4ecdd; /* Soft warm sand/beige */
  width: 21%;
}

.programme-table thead th.col-title {
  background-color: #eee7dd; /* Soft light cream/khaki */
  width: 26%;
}

.programme-table thead th.col-format {
  background-color: #e3ece3; /* Soft sage green */
  width: 23%;
}

.programme-table thead th.col-actions {
  background-color: #dce5ee; /* Soft slate/blue */
  width: 12%;
  text-align: center;
}

.programme-table tbody tr {
  border-bottom: 1px solid #e7e2d8;
  transition: background-color 0.15s ease;
}

.programme-table tbody tr:last-child {
  border-bottom: none;
}

.programme-table tbody tr:hover {
  background-color: #faf8f5;
}

.programme-table tbody td {
  padding: 16px 18px;
  vertical-align: top;
  border-right: 1px solid #ece6dc;
  font-size: 0.94rem;
  line-height: 1.5;
  color: var(--text-color);
  background-color: inherit;
}

.programme-table tbody td:last-child {
  border-right: none;
}

/* Column Specific Typography & Alignment */
.sched-date {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.94rem;
  color: #1a202c;
  line-height: 1.35;
}

.sched-time {
  font-family: var(--font-sans);
  font-size: 0.84rem;
  color: #57534e;
  margin-top: 4px;
  line-height: 1.35;
}

.sched-tz {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: #78716c;
}

.sched-speaker-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.06rem;
  color: #0c1a2e;
  line-height: 1.35;
  display: block;
}

.sched-affiliation {
  font-family: var(--font-sans);
  font-size: 0.83rem;
  color: #64748b;
  margin-top: 4px;
  display: block;
  line-height: 1.35;
}

.sched-talk-title {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.02rem;
  color: #1a1917;
  line-height: 1.45;
}

.sched-talk-note {
  font-family: var(--font-sans);
  font-style: normal;
  font-size: 0.82rem;
  color: #64748b;
  margin-top: 4px;
  display: block;
}

.sched-format-list {
  margin: 0;
  padding-left: 1.15rem;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  line-height: 1.55;
  color: #334155;
}

.sched-format-list li {
  margin-bottom: 0.2rem;
}

.sched-format-list li:last-child {
  margin-bottom: 0;
}

.sched-actions {
  display: flex;
  flex-direction: column;
  gap: 7px;
  align-items: center;
  justify-content: center;
}

.btn-table-outline {
  display: block;
  width: 100%;
  max-width: 105px;
  padding: 6px 8px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  color: #1e293b;
  background-color: #ffffff;
  border: 1px solid #334155;
  border-radius: 2px;
  text-decoration: none;
  text-align: center;
  line-height: 1.25;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-table-outline:hover {
  background-color: #f1f5f9;
  color: #0f172a;
  text-decoration: none;
}

.btn-table-primary {
  display: block;
  width: 100%;
  max-width: 105px;
  padding: 6px 8px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffffff;
  background-color: #162b40;
  border: 1px solid #162b40;
  border-radius: 2px;
  text-decoration: none;
  text-align: center;
  line-height: 1.25;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-table-primary:hover {
  background-color: #0a1827;
  border-color: #0a1827;
  color: #ffffff;
  text-decoration: none;
}

.btn-table-zoom {
  display: block;
  width: 100%;
  max-width: 105px;
  padding: 6px 8px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffffff !important;
  background-color: #1e5a96;
  border: 1px solid #1e5a96;
  border-radius: 2px;
  text-decoration: none !important;
  text-align: center;
  line-height: 1.25;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-table-zoom:hover {
  background-color: #154270;
  border-color: #154270;
  color: #ffffff !important;
}

.sched-empty-action {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  color: #94a3b8;
  display: block;
  text-align: center;
}

/* Modal styling for Abstract */
.abstract-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(12, 35, 64, 0.5);
  backdrop-filter: blur(2px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.25rem;
}

.abstract-modal-backdrop.open {
  display: flex;
}

.abstract-modal {
  background: #ffffff;
  max-width: 680px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  border-radius: 6px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.22);
  border: 1px solid var(--border-color);
  padding: 2.2rem;
  position: relative;
  animation: modalFadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close-btn {
  position: absolute;
  top: 1.1rem;
  right: 1.25rem;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  color: #475569;
  line-height: 1;
  transition: all 0.15s ease;
}

.modal-close-btn:hover {
  background: #e2e8f0;
  color: #0f172a;
}

/* Scroll hint for mobile & tablet table browsing */
.table-scroll-hint {
  display: none;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: #64748b;
  margin: 0.4rem 0 0.85rem;
  align-items: center;
  gap: 0.45rem;
}

@media (max-width: 980px) {
  .table-scroll-hint {
    display: flex;
  }
}

@media (max-width: 640px) {
  .abstract-modal {
    width: 95%;
    max-height: 90vh;
    padding: 1.6rem 1.25rem 1.35rem;
    border-radius: 8px;
  }

  .modal-close-btn {
    top: 0.75rem;
    right: 0.75rem;
    width: 36px;
    height: 36px;
  }
}