/* ============================================================
   AI Conference Deadlines — Main Stylesheet
   ============================================================ */

/* ---------- Base / Reset ---------- */
body {
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  color: #2d3748;
  -webkit-font-smoothing: antialiased;
  background: #f7f8fa;
}

body *::selection,
body *::-webkit-selection {
  background: #e74c3c;
  color: #fff;
}

.container {
  max-width: 1000px;
}

/* ---------- Typography ---------- */
h1, h2, h3 {
  font-weight: 600;
  color: #1a202c;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
  line-height: 1.2;
}

h2 {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.3;
}

h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.3;
}

p {
  text-align: left;
}

a {
  text-decoration: none;
  color: #2563eb;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s, color 0.15s;
}

a:hover,
a:focus {
  color: #1d4ed8;
  border-bottom-color: #1d4ed8;
  text-decoration: none;
}

/* ---------- Top strip ---------- */
.top-strip {
  background: linear-gradient(90deg, #2563eb 0%, #7c3aed 100%);
  height: 4px;
  width: 100%;
}

/* ---------- Navbar ---------- */
.navbar.bg-dark {
  background: #1a202c !important;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.navbar-brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #fff !important;
  border-bottom: none !important;
}

/* ---------- Page header area ---------- */
.page-header {
  margin-top: 24px;
  margin-bottom: 16px;
  padding: 20px 24px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
}

#conf-title.page-header {
  border-bottom: none;
}

#conf-full-name {
  margin-bottom: 5px;
}

.meta {
  font-size: 13px;
  color: #718096;
}

/* ---------- Filter row ---------- */
.filter-label {
  text-align: right;
  font-weight: 500;
  color: #4a5568;
}

/* ---------- Conference list container ---------- */
#confs {
  margin-top: 16px;
}

/* ---------- Individual conference card ---------- */
.ConfItem {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.07);
  padding: 14px 18px 10px;
  margin-bottom: 10px;
  border-left: 4px solid #e2e8f0;
  transition: box-shadow 0.15s, border-color 0.15s;
}

.ConfItem:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.10);
  border-left-color: #2563eb;
}

.ConfItem.past {
  opacity: 0.72;
  border-left-color: #e2e8f0;
  background: #fafafa;
}

.ConfItem.past:hover {
  opacity: 0.88;
  border-left-color: #a0aec0;
}

/* urgency colour coding on the left border */
.ConfItem[diff="-0"],
.ConfItem[diff="0"],
.ConfItem[diff="1"],
.ConfItem[diff="2"],
.ConfItem[diff="3"],
.ConfItem[diff="4"],
.ConfItem[diff="5"],
.ConfItem[diff="6"],
.ConfItem[diff="7"] {
  border-left-color: #e53e3e; /* < 1 week — red */
}

/* We use JS-set diff attribute, so handle via CSS attribute selectors is limited;
   the red / orange / green fallback is handled by JavaScript below via classes */

.ConfItem.deadline-critical { border-left-color: #e53e3e; }  /* ≤ 7 days  */
.ConfItem.deadline-soon     { border-left-color: #dd6b20; }  /* 8–30 days */
.ConfItem.deadline-ok       { border-left-color: #38a169; }  /* > 30 days */

/* ---------- Conference title & icons ---------- */
.conf-row {
  margin-bottom: 4px;
  align-items: center;
}

.conf-title,
.conf-title-small,
.conf-title-icon {
  font-size: 18px;
  font-weight: 600;
}

.conf-title a,
.conf-title-small a {
  color: #1a202c;
  border-bottom: none;
}

.conf-title a:hover,
.conf-title-small a:hover {
  color: #2563eb;
}

.conf-title-small {
  display: none;
}

.conf-title-icon {
  white-space: nowrap;
  font-size: 18px;
  margin-left: 4px;
}

.badge-link {
  vertical-align: middle;
  margin-bottom: 3px;
  margin-left: 3px;
  margin-right: 3px;
  opacity: 0.7;
  transition: opacity 0.15s;
}

.badge-link:hover {
  opacity: 1;
}

/* ---------- Countdown timer ---------- */
.timer,
.timer-small {
  font-size: 18px;
  font-weight: 600;
  color: #2563eb;
  text-align: right;
  white-space: nowrap;
}

.timer-small {
  display: none;
}

/* ---------- Deadline & meta ---------- */
.deadline,
.meta {
  font-size: 13px;
}

.conf-date,
.conf-place {
  font-size: 13px;
  color: #4a5568;
}

.conf-place a {
  color: #4a5568;
  border-bottom: none;
}

.conf-place a:hover {
  color: #2563eb;
}

/* ---------- Notes ---------- */
.note {
  font-size: 12px;
  color: #718096;
  margin-top: 4px;
  margin-bottom: 4px;
}

.note.predicted {
  background: #fff5f5;
  color: #c53030;
  padding: 5px 10px;
  border-radius: 4px;
  border-left: 3px solid #fc8181;
}

/* ---------- Subject tag badges ---------- */
.conf-sub {
  display: inline-block;
  color: #2563eb;
  background: #ebf4ff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  margin-right: 5px;
  margin-top: 6px;
  border-radius: 3px;
  cursor: pointer;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  transition: background 0.15s, color 0.15s;
}

.conf-sub:hover {
  background: #2563eb;
  color: #fff;
}

/* ---------- Past events section ---------- */
#past-events-title {
  padding-bottom: 12px;
  border-bottom: 2px solid #e53e3e;
  color: #e53e3e;
  margin-top: 28px;
}

/* ---------- Potential calls section ---------- */
#potential-calls-title {
  padding-bottom: 12px;
  border-bottom: 2px solid #dd6b20;
  color: #dd6b20;
  margin-top: 30px;
}

.potential-call {
  opacity: 0.92;
  border-left: 3px solid #dd6b20;
  padding-left: 10px;
  margin-left: -10px;
}

/* ---------- Sort order checkbox ---------- */
#sort-order-checkbox {
  text-align: right;
  font-size: 13px;
  padding-top: 6px;
  color: #718096;
}

/* ---------- Calendar button ---------- */
.calendar {
  font-size: 12px;
  margin-top: 4px;
}

.calendar img {
  height: 18px;
  margin-right: 4px;
}

.ind-cal {
  margin: 0 4px;
}

/* ---------- PaperswithCode icon ---------- */
.pwc-link {
  text-decoration: none;
  border: none;
}

.pwc-link:hover {
  border-bottom: 1px solid #1198b2;
}

.icon-inner {
  width: 0.95em;
  height: 0.95em;
  display: inline-block;
  vertical-align: middle;
  position: relative;
  fill: currentColor;
}

.pwc-icon {
  color: #1198b2;
}

/* ---------- Footer ---------- */
footer {
  font-size: 13px;
  color: #718096;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid #e2e8f0;
}

footer a {
  color: #4a5568;
  border-bottom: none;
}

footer a:hover {
  color: #2563eb;
}

.footer-links a {
  margin-right: 12px;
}

.twitter-github-icons {
  line-height: 16px;
}

/* ---------- Conference detail page ---------- */
#conf-timer {
  font-size: 64px;
  color: #2563eb;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 0.5em;
}

#conf-key-facts {
  margin-bottom: 10px;
}

p.authors {
  margin-bottom: 5px;
  color: #718096;
  font-size: 18px;
}

.badge-danger {
  background-color: #e53e3e;
}

/* ---------- Images ---------- */
img {
  max-width: 100%;
}

.thumb {
  margin: 20px 0;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
}

/* ---------- Code ---------- */
pre {
  color: #2d3748;
  font-size: 12px;
  line-height: 1.5;
  background: #f7fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 12px;
}

/* ---------- Checkbox styles ---------- */
.checkbox {
  font-size: 12px;
}

.checkbox input[type="checkbox"]:checked:after,
#sort-order-checkbox input[type="checkbox"]:checked:after {
  background-color: #2563eb;
  border-color: #2563eb;
}

.checkbox input[type="checkbox"]:after,
.checkbox input[type="checkbox"]:focus:after,
#sort-order-checkbox input[type="checkbox"]:after,
#sort-order-checkbox input[type="checkbox"]:focus:after {
  border-color: #2563eb;
}

/* ============================================================
   Responsive overrides
   ============================================================ */

@media only screen and (max-width: 768px) {
  #conf-timer {
    font-size: 52px;
  }
  .calendar {
    margin-bottom: 8px;
  }
  .filter-label {
    text-align: left;
  }
  .page-header {
    padding: 14px 16px;
  }
}

@media only screen and (max-width: 576px) {
  #conf-timer {
    font-size: 36px;
  }
  .conf-place {
    display: none;
  }
  .conf-date {
    display: none;
  }
  .note {
    display: none;
  }
  .conf-row {
    margin-bottom: 6px;
  }
  .timer {
    display: none;
  }
  .timer-small {
    display: block;
    text-align: right;
  }
  .conf-title {
    display: none;
  }
  .conf-title-small {
    display: inline;
  }
  .ConfItem {
    padding: 10px 12px 8px;
    margin-bottom: 8px;
  }
}

@media only screen and (max-width: 375px) {
  #conf-timer {
    font-size: 28px;
  }
}