@import url('https://fonts.googleapis.com/css2?family=Libre+Franklin:wght@400;600;700&family=Source+Sans+3:wght@400;500;600&display=swap');

:root {
  --primary: #395542;
  --primary-hover: #2d4435;
  --primary-light: #eef4f0;
  --bg: #f2f2f2;
  --card-bg: #ffffff;
  --text: #414141;
  --text-muted: #767676;
  --border: #d4d4d4;
  --success: #395542;
  --success-bg: #eef4f0;
  --error: #c53030;
  --error-bg: #fff5f5;
  --radius: 8px;
}

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

body {
  font-family: 'Source Sans 3', Arial, sans-serif;
  background: #faf9f7;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  padding-top: 56px;
}

/* ========== Top Navigation Bar ========== */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: #2d4435;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.top-nav__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #ffffff;
}

.top-nav__logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.top-nav__title {
  font-family: 'Libre Franklin', Arial, sans-serif;
  font-weight: 600;
  font-size: 1rem;
}

.top-nav__links {
  display: flex;
  gap: 0;
  list-style: none;
  height: 100%;
}

.top-nav__links a {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 1rem;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 400;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.top-nav__links a:hover {
  color: #ffffff;
}

.top-nav__links a.active {
  color: #8cc5e0;
  border-bottom-color: #8cc5e0;
}

/* Nav notification badge */
.nav-badge {
  position: absolute;
  top: 8px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 9px;
  background: #dc2626;
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
  pointer-events: none;
  animation: badgePop 0.3s ease;
}
.nav-badge[hidden] { display: none; }

@keyframes badgePop {
  0% { transform: scale(0); }
  70% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* Nav link pulse when new message arrives */
.nav-link--notify {
  animation: navPulse 0.4s ease 3;
}
@keyframes navPulse {
  0%, 100% { color: var(--primary); }
  50% { color: #dc2626; }
}

/* ========== Layout ========== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.container--wide {
  max-width: 1100px;
}

/* ========== Page Header ========== */
.page-header {
  text-align: left;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-family: 'Libre Franklin', Arial, sans-serif;
  font-size: 1.375rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.125rem;
}

.page-header p {
  color: rgba(255,255,255,0.7);
  font-size: 0.9375rem;
}

.page-header a {
  color: #8cc5e0;
  text-decoration: none;
}

.page-header a:hover {
  text-decoration: underline;
}

/* ========== Card ========== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border-left: 3px solid var(--primary);
  padding: 1.5rem 2rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

/* ========== Form ========== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.375rem;
  font-size: 0.875rem;
  color: var(--text);
}

.form-group .required::after {
  content: " *";
  color: var(--error);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="tel"],
.form-group input[type="date"],
.form-group select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--card-bg);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(57, 85, 66, 0.15);
}

.form-group--error input,
.form-group--error select {
  border-color: var(--error);
}

.field-error {
  display: block;
  color: var(--error);
  font-size: 0.8125rem;
  margin-top: 0.25rem;
}

/* ========== Checkbox Group ========== */
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 400;
  font-size: 0.875rem;
  flex: 1 1 calc(50% - 0.25rem);
  min-width: 200px;
  transition: border-color 0.15s, background 0.15s;
}

.checkbox-group label:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.checkbox-group input[type="checkbox"]:checked + span {
  color: var(--primary);
  font-weight: 500;
}

.checkbox-group input[type="checkbox"]:checked ~ span {
  color: var(--primary);
  font-weight: 500;
}

.checkbox-group label:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  transition: background 0.15s, opacity 0.15s;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 1.33px solid var(--primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--primary-light);
}

.btn-block {
  width: 100%;
}

/* ========== Messages ========== */
.message {
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  margin-top: 1rem;
  font-size: 0.9375rem;
}

.message--success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #c6e0cc;
}

.message--error {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid #fecaca;
}

/* ========== Admin Toolbar ========== */
.toolbar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

.toolbar input[type="text"] {
  flex: 1;
  min-width: 200px;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 9999px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--text);
  background: var(--card-bg);
}

.toolbar input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(57, 85, 66, 0.15);
}

.badge {
  padding: 2px 8px;
  background: var(--primary);
  color: #fff;
  border-radius: 9999px;
  font-size: 0.6875rem;
  font-weight: 600;
  white-space: nowrap;
  text-transform: uppercase;
}

.badge--count {
  background: var(--bg);
  color: var(--text-muted);
  font-size: 0.8125rem;
  padding: 0.375rem 0.75rem;
  text-transform: none;
}

/* ========== Table ========== */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  background: var(--bg);
  font-weight: 600;
  text-align: left;
  padding: 0.75rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  white-space: nowrap;
}

td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
  vertical-align: top;
}

tr:hover td {
  background: var(--primary-light);
}

/* ========== Empty State ========== */
.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem;
  font-size: 0.9375rem;
}

/* ========== Footer Link ========== */
.admin-link {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.875rem;
}

.admin-link a {
  color: var(--text-muted);
  text-decoration: none;
}

.admin-link a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* ========== Day Selector ========== */
.day-selector {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.day-btn {
  padding: 0.5rem 1.25rem;
  border: 1.33px solid var(--primary);
  border-radius: 9999px;
  background: transparent;
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.day-btn:hover {
  background: var(--primary-light);
}

.day-btn.active {
  background: var(--primary);
  color: #fff;
}

/* ========== Schedule Timeline ========== */
.schedule-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.schedule-list[hidden] {
  display: none;
}

.schedule-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: box-shadow 0.15s, border-color 0.15s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.schedule-item:hover {
  border-color: #b0b0b0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.schedule-item__time {
  flex-shrink: 0;
  width: 80px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  padding-top: 2px;
}

.schedule-item__content {
  flex: 1;
  min-width: 0;
}

.schedule-item__title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.schedule-item__location {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.schedule-item__end {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

.schedule-item__chevron {
  flex-shrink: 0;
  font-size: 1.25rem;
  color: var(--text-muted);
  align-self: center;
  line-height: 1;
}

/* ========== Category Badges ========== */
.category-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 9999px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.category-badge--meal {
  background: #fef3c7;
  color: #92400e;
}

.category-badge--keynote {
  background: var(--primary);
  color: #fff;
}

.category-badge--breakout {
  background: #dbeafe;
  color: #1e40af;
}

.category-badge--social {
  background: #ede9fe;
  color: #5b21b6;
}

/* ========== Info Highlights ========== */
.info-highlights {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  background: var(--primary-light);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}

.info-highlight {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9375rem;
}

.info-highlight__icon {
  flex-shrink: 0;
  font-size: 1.125rem;
  line-height: 1.6;
}

.info-highlight strong {
  color: var(--primary);
}

/* ========== Accordion ========== */
.accordion {
  display: flex;
  flex-direction: column;
}

.accordion-item {
  border-bottom: 1px solid var(--border);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 0;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--text);
  text-align: left;
}

.accordion-header:hover {
  color: var(--primary);
}

.accordion-chevron {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.accordion-item--open .accordion-chevron {
  transform: rotate(90deg);
}

.accordion-body {
  display: none;
  padding: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text);
}

.accordion-item--open .accordion-body {
  display: block;
}

.accordion-body p {
  margin-bottom: 0.75rem;
}

.accordion-body p:last-child {
  margin-bottom: 0;
}

.accordion-body strong {
  color: var(--primary);
}

/* ========== Session Cards ========== */
.session-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.session-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  padding: 1.25rem 1.5rem;
  transition: box-shadow 0.15s, border-color 0.15s;
  position: relative;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.session-card:hover {
  border-color: #b0b0b0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.session-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.session-card__header-content {
  flex: 1;
  min-width: 0;
}

.session-card__chevron {
  flex-shrink: 0;
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-left: 1rem;
  transition: transform 0.2s;
  line-height: 1;
}

.session-card--open .session-card__chevron {
  transform: rotate(180deg);
}

.session-card__meta {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.125rem;
}

.session-card__location {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.session-card__title {
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--text);
  margin-bottom: 0.5rem;
  font-family: 'Libre Franklin', Arial, sans-serif;
}

.session-card__speakers {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.session-card__avatars {
  display: flex;
  gap: -4px;
}

.speaker-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.speaker-avatar--db { background: #2563eb; }
.speaker-avatar--sm { background: #7c3aed; }
.speaker-avatar--mt { background: #059669; }
.speaker-avatar--jp { background: #dc2626; }
.speaker-avatar--ar { background: #d97706; }

.session-card__speaker-names {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.session-card__detail {
  display: none;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text);
}

.session-card--open .session-card__detail {
  display: block;
}

.session-card__detail p {
  margin-bottom: 0.75rem;
}

.session-card__speaker-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.session-card__bio {
  background: var(--bg);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: normal;
}

.session-card__bio strong {
  color: var(--text);
  font-style: normal;
}

.session-card__bio p {
  margin-bottom: 0.25rem;
}

/* ========== Admin Gate ========== */
.admin-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 56px);
}

.admin-gate[hidden] {
  display: none;
}

.admin-gate__card {
  max-width: 380px;
  margin: 0 auto;
  text-align: center;
}

.admin-gate__card h2 {
  font-family: 'Libre Franklin', Arial, sans-serif;
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.admin-gate__card > p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.admin-gate__form .form-group {
  margin-bottom: 1rem;
}

.admin-gate__form input[type="password"] {
  text-align: center;
  font-size: 1rem;
}

/* Admin Modal */
.admin-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}
.admin-modal-overlay[hidden] {
  display: none;
}
.admin-modal {
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

/* Admin table action buttons */
.btn-action {
  padding: 0.25rem 0.625rem;
  font-size: 0.8125rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  background: var(--card-bg);
  color: var(--text);
}
.btn-action:hover {
  background: var(--bg);
}
.btn-action--danger {
  color: #dc2626;
  border-color: #fca5a5;
}
.btn-action--danger:hover {
  background: #fef2f2;
}

/* ========== People Grid ========== */
.people-toolbar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.people-toolbar input[type="text"] {
  flex: 1;
  min-width: 200px;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 9999px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--text);
  background: var(--card-bg);
}

.people-toolbar input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(57, 85, 66, 0.15);
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.person-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border-left: 3px solid var(--primary);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.person-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
}

.person-card__name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.person-card__org {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.person-card__arrival {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.375rem;
}

.person-card__chat {
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 600;
  margin-top: 0.5rem;
  opacity: 0;
  transition: opacity 0.15s;
}

.person-card:hover .person-card__chat {
  opacity: 1;
}

.person-card:hover {
  border-color: var(--primary);
  cursor: pointer;
}

/* ========== Responsive ========== */
@media (max-width: 640px) {
  .container {
    padding: 1rem 0.75rem;
  }

  .card {
    padding: 1.25rem;
  }

  .page-header h1 {
    font-size: 1.25rem;
  }

  .checkbox-group label {
    flex: 1 1 100%;
    min-width: 0;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar input[type="text"] {
    min-width: 0;
  }

  td, th {
    padding: 0.5rem;
    font-size: 0.8125rem;
  }

  .top-nav {
    padding: 0 0.75rem;
  }

  .top-nav__title {
    font-size: 0.875rem;
  }

  .top-nav__links a {
    padding: 0 0.5rem;
    font-size: 0.75rem;
  }

  .day-selector {
    flex-wrap: wrap;
  }

  .day-btn {
    flex: 1;
    text-align: center;
    padding: 0.5rem 0.75rem;
    font-size: 0.8125rem;
  }

  .schedule-item {
    padding: 1rem;
    gap: 0.75rem;
  }

  .schedule-item__time {
    width: 70px;
    font-size: 0.8125rem;
  }

  .people-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .people-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .people-toolbar input[type="text"] {
    min-width: 0;
  }

  .session-card {
    padding: 1rem;
  }

  .session-card__bio {
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (max-width: 420px) {
  .people-grid {
    grid-template-columns: 1fr;
  }

  .top-nav__title {
    display: none;
  }
}