/* ========================================================
   ICIMSP 2027 - Conference Website Responsive CSS
======================================================== */

/* ---------- Reset & Base Styles ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #f5f7fa;
  color: #222;
  line-height: 1.6;
  font-size: 16px;
}

/* Full width containers for main sections */
body > header, .hero, body > footer {
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
}

/* ---------- Utility Container ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 22px;
  box-sizing: border-box;
}

/* ---------- Header & Navigation ---------- */
header {
  background: #062a57;
  color: #ffffff;
  padding: 24px 0 0 0;
  border-bottom: 1px solid #0d3d79;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  text-align: center;
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 22px;
}
.logo-left img.logo-large { height: 92px; margin-left: 2px; }
.logo-right img.logo-large { height: 92px; margin-left: 2px; }
.header-center { flex: 2 1 340px; min-width: 330px; padding: 8px 0; }
.header-center h1 {
  margin: 0 0 2px 0;
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: #ffffff;
}
.header-center p {
  font-size: 1.23rem;
  font-weight: 500;
  margin: 4px 0;
  opacity: 1;
  color: #e6eef8;
}
/* Normalize home header inline font override */
.header-center p:first-child {
  font-size: 1.23rem !important;
  font-weight: 500 !important;
}

/* ---------- Navigation Menu ---------- */
nav[aria-label="Main navigation"] { margin-top: 15px; }
.main-nav {
  display: flex;
  justify-content: center;
  list-style: none;
  gap: 13px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.main-nav a {
  color: #ffffff;
  background: rgba(255,255,255,0.08);
  text-decoration: none;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 6px;
  display: inline-block;
  border: 1px solid rgba(255,255,255,0.22);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.main-nav a.active, .main-nav a:hover, .main-nav a:focus {
  background: #0b3f7a;
  color: #ffffff;
  border-color: #2f66a4;
  outline: none;
}

/* ---------- Dropdown / Submenu Styles (for Committee menu) ---------- */
/* Mark dropdown parent */
.main-nav .dropdown { position: relative; }

/* Add caret indicator for dropdown parents */
.main-nav .dropdown > a::after {
  content: " ▼";
  font-size: 0.9em;
  margin-left: 0.25rem;
}

/* Submenu container */
.main-nav .submenu {
  display: none;
  position: absolute;
  left: 0;
  top: calc(100% + 0.2rem);
  background: #ffffff;
  border: 1px solid #ddd;
  list-style: none;
  padding: 0.25rem 0;
  min-width: 220px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
  z-index: 10;
  border-radius: 6px;
}

/* Submenu items */
.main-nav .submenu li { margin: 0; }
.main-nav .submenu li a {
  display: block;
  padding: 0.45rem 0.8rem;
  white-space: nowrap;
  color: #003366;
  font-weight: 600;
  background: transparent;
  text-decoration: none;
}

/* Hover / focus states for submenu links */
.main-nav .submenu li a:hover,
.main-nav .submenu li a:focus {
  background: #f1f7ff;
  outline: none;
}

/* Show submenu on hover/focus for desktop */
.main-nav .dropdown:hover .submenu,
.main-nav .dropdown:focus-within .submenu {
  display: block;
}

/* Ensure keyboard users can see focus */
.main-nav .dropdown:focus-within > a {
  background: #0b3f7a;
  color: #ffffff;
  border-color: #2f66a4;
}

/* Mobile / narrow screens: let submenu flow in-document */
@media (max-width: 700px) {
  .main-nav { flex-direction: column; align-items: stretch; }
  .main-nav .submenu {
    position: static;
    border: none;
    box-shadow: none;
    display: none; /* keep collapsed by default on small screen */
    padding-left: 1rem;
  }
  /* Simple reveal when parent has .open (JS can toggle this), fallback for keyboard: show on focus-within */
  .main-nav .dropdown.open .submenu,
  .main-nav .dropdown:focus-within .submenu {
    display: block;
  }
  /* make submenu links match nav style on mobile */
  .main-nav .submenu li a {
    color: #ffffff;
    padding-left: 1.6rem;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.22);
    font-weight: 600;
  }
  .main-nav .submenu li a:hover,
  .main-nav .submenu li a:focus {
    background: #0b3f7a;
  }
}

/* ---------- Hero Section ---------- */
.hero {
  background: #e1eaf8;
  padding: 44px 0 38px 0;
}
.hero .container {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
}
.hero-text { flex: 1 1 410px; min-width: 300px; }
.hero-text h2 {
  font-size: 2.22rem;
  color: #003366;
  margin: 0 0 14px 0;
  font-weight: 700;
}
.hero-text p { font-size: 1.10rem; color: #444; margin-bottom: 0.9rem; }
.hero-buttons { display: flex; gap: 15px; margin-top: 10px; }
.btn {
  background: #003366;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.65rem 1.3rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background 0.2s;
}
.btn.secondary { background: #fff; color: #003366; border: 2px solid #003366; }
.btn.tertiary { background: transparent; color: #003366; border: none; text-decoration: underline; font-size: 1rem; padding: 0.56rem 1rem; }

/* ---------- Hero Image ---------- */
.hero-image {
  flex: 1 1 250px;
  min-width: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-image img {
  max-width: 340px;
  border-radius: 9px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.09);
  background: #fff;
  padding: 0;
}

/* ---------- Section Grids ---------- */
.grid-two-columns, .key-dates .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 29px;
}
.grid-three-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 24px;
  margin-top: 26px;
}
.grid-four-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 17px;
  margin: 1.4rem 0;
}

/* ---------- Cards & Info Blocks ---------- */
.card, .info-card {
  background: #fff;
  border-radius: 8px;
  padding: 1rem 1.1rem;
  box-shadow: 0 3px 8px rgba(0,0,0,0.05);
  text-align: center;
}
.info-card i { font-size: 2rem; color: #003366; margin-bottom: 0.5rem; }
.card h3, .info-card h3 { margin: 0.45rem 0 0.34rem 0; color: #003366; font-weight: 700; }
.card p, .info-card p { margin: 0.32rem 0 0.32rem 0; font-size: 1rem; color: #555; }
.card a { color: #003366; font-weight: 600; text-decoration: none; margin-top: 14px; display: inline-block; transition: color 0.2s; }
.card a:hover, .card a:focus { text-decoration: underline; outline: none; }

/* ---------- Schedule Table ---------- */
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}
.schedule-table th, .schedule-table td {
  padding: 8px 10px;
  border-bottom: 1px solid #eee;
  vertical-align: top;
  text-align: left;
}
.schedule-table th { background: #f7fafc; color: #003057; font-weight: 700; }

/* ---------- Schedule Tabs ---------- */
.schedule-controls {
  display: flex;
  gap: 13px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 11px;
}
.tab-btn {
  background: #fff;
  border: 1px solid #d7dbe0;
  padding: 7px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s, border-color 0.2s;
}
.tab-btn[aria-selected="true"] {
  background: #003366;
  color: #fff;
  border-color: #003366;
}

/* ---------- About Page Layout ---------- */
.about-layout {
  display: grid;
  grid-template-columns: 155px 1fr;
  gap: 15px;
  margin: 1.3rem 0;
  align-items: start;
}
@media (max-width: 700px) {
  .about-layout { grid-template-columns: 1fr; gap: 12px; }
}
.about-aside {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 7px rgba(0,0,0,0.07);
  padding: 0.55rem 0.36rem;
  text-align: center;
}
.about-aside img {
  width: 68px;
  height: auto;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.quick-facts h3 { font-size: 1.05rem; margin-bottom: 0.43rem; }
.quick-facts ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}
.quick-facts ul li { margin: 0.05em 0; font-size: 0.96rem; }
.about-aside figure img {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 0.46rem;
}
.about-aside figcaption {
  font-size: 0.81rem;
  color: #555;
  margin-bottom: 0.33rem;
}
.about-main section, .about-main h2, .about-main h3 {
  margin-bottom: 0.8rem;
}
.conference-topics { margin-top: 0.95rem; }

/* ---------- Forms ---------- */
form { display: flex; flex-direction: column; gap: 1rem; }
label { font-weight: 600; }
input[type="text"], input[type="email"], textarea {
  font-size: 1rem; padding: 7px 10px; border: 1px solid #bbb; border-radius: 6px; resize: vertical;
}
textarea { min-height: 90px; }
input[type="text"]:focus, input[type="email"]:focus, textarea:focus {
  outline: none; border-color: #003366; box-shadow: 0 0 5px rgba(0,51,102,0.21);
}
button[type="submit"] { max-width: 160px; cursor: pointer; }

/* ---------- Footer ---------- */
footer {
  text-align: center;
  padding: 1rem 7px;
  font-size: 0.95rem;
  color: #e6eef8;
  background: #062a57;
  border-top: 1px solid #0d3d79;
  margin-top: 2.1rem;
}

/* ---------- Responsive Adjustments ---------- */
@media (max-width: 1250px) {
  .header-inner, .container { padding-left: 8px; padding-right: 8px; }
  .about-layout { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .header-inner { flex-direction: column; text-align: center; gap: 11px; }
  .hero .container { flex-direction: column; align-items: stretch; gap: 14px; }
  .main-nav { gap: 5px; }
  .about-layout, .grid-two-columns, .grid-three-cards, .grid-four-cards {
    grid-template-columns: 1fr; gap: 12px;
  }
}
@media (max-width: 480px) {
  .main-nav a { padding: 5px 7px; font-size: 0.89rem; }
  .header-center h1 { font-size: 1.09rem; }
}

/* ---------- committee-grid ---------- */

.committee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 2rem 0;
}
.committee-col ul {
  margin: 0 0 2rem 0;
  padding-left: 1.2em;
}
.committee-col h2 {
  font-size: 1.07rem;
  color: #004a99;
  margin: 1.2em 0 0.5em 0;
}
@media (max-width: 900px) {
  .committee-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* ---------- contact-grid  ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 2rem 0;
}
.contact-col {
  background: #fff;
  border-radius: 8px;
  padding: 1.2rem 1rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.contact-col ul {
  padding-left: 1em;
  margin-bottom: 1.2rem;
}
.contact-col h2 {
  font-size: 1.1rem;
  color: #003366;
  margin: 1.2em 0 0.7em 0;
}
@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; gap: 16px; }
}
.map-responsive iframe {
  width: 100%;
  min-height: 160px;
  border: 0;
  border-radius: 8px;
}


 /* ---------- speaker grid ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) {
  .card-grid { grid-template-columns: 1fr; gap: 18px; }
}
.card img {
  width: 100%;
  max-height: 210px;
  object-fit: cover;
  border-radius: 8px;
}

/* ---------- Conference Tracks grid ---------- */
.cfp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 2.3rem;
}
.cfp-col {
  min-width: 0;
  background: #fff;
  border-radius: 8px;
  padding: 0.9rem 0.7rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.cfp-col .card, .cfp-col .form-card {
  margin-bottom: 18px;
}
.cfp-col details {
  margin-bottom: 9px;
}
@media (max-width: 900px) {
  .cfp-grid { grid-template-columns: 1fr; gap: 20px; }
}
/* Committee photo cards */
.committee-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.committee-card img {
  width: 85px;
  height: 95px;
  object-fit: cover;
  border-radius: 6px;
  background: #ddd;
}

.committee-card .info {
  flex: 1;
  font-size: 0.97rem;
}

.committee-card .info strong {
  color: #003366;
  font-size: 1rem;
}

/* ---------- Home consistency overrides ---------- */
.hero {
  background: #edf3fa;
}
.hero-text h2 {
  color: #0a2f5d;
}
.hero-buttons .btn.secondary,
.hero-buttons .btn.tertiary {
  border: 1px solid #2f66a4;
  background: #0b3f7a;
  color: #ffffff;
  text-decoration: none;
}
.info-card-custom {
  border-radius: 8px !important;
  box-shadow: 0 3px 8px rgba(0,0,0,0.05) !important;
}
.info-card-custom h2 {
  color: #0a2f5d !important;
  border-bottom: 2px solid #2f66a4 !important;
}
.countdown-container {
  background: linear-gradient(135deg, #0a2f5d, #0b3f7a) !important;
}

/* ---------- Committee page layout fix ---------- */
.committee-hero {
  background: #edf3fa;
  border: 1px solid #d4e1ef;
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 1rem 0 1.6rem;
  text-align: center;
  color: #0a2f5d;
}
.section-title {
  color: #0a2f5d;
  margin: 1.8rem 0 1rem;
}
.grid-3cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  align-items: start;
  margin-bottom: 1rem;
}
.grid-2cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  align-items: start;
}
.committee-card-item,
.advisory-card {
  background: #ffffff;
  border: 1px solid #dbe6f2;
  border-radius: 8px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.05);
  overflow: hidden;
}
.committee-card-header,
.advisory-card-header {
  background: #f2f7fd;
  border-bottom: 1px solid #dbe6f2;
  padding: 0.7rem 0.9rem;
}
.committee-card-header h2,
.advisory-card-header h3 {
  margin: 0;
  font-size: 1rem;
  color: #0a2f5d;
}
.committee-card-body,
.advisory-card-body {
  padding: 0.85rem 0.95rem;
}
.committee-list {
  margin: 0;
  padding-left: 1.2rem;
}
.committee-list li {
  margin-bottom: 0.42rem;
}
.person-card {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 0.65rem;
  align-items: start;
  margin-bottom: 0.65rem;
}
.person-photo {
  width: 75px;
  height: 85px;
  object-fit: cover;
  border-radius: 6px;
  background: #dde6f0;
}
.person-info {
  font-size: 0.95rem;
  line-height: 1.45;
}
.update-note,
.footer-note {
  background: #edf3fa;
  border: 1px solid #d4e1ef;
  color: #2c4560;
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  margin-top: 0.8rem;
}
@media (max-width: 1024px) {
  .grid-3cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 760px) {
  .grid-3cols,
  .grid-2cols {
    grid-template-columns: 1fr;
  }
}