/* ========== CSS VARIABLES ========== */
:root {
  --color-primary: #0D7377;
  --color-primary-dark: #095B5E;
  --color-primary-light: #E0F2F2;
  --color-accent: #E8A838;
  --color-accent-dark: #C88C20;
  --color-bg: #F7F9FC;
  --color-surface: #FFFFFF;
  --color-text: #1A2B3C;
  --color-text-secondary: #5A6B7C;
  --color-border: #E2E8F0;
  --color-success: #16A34A;
  --color-danger: #DC2626;
  --color-danger-light: #FEE2E2;
  --color-success-light: #DCFCE7;
  /* Subfield colors */
  --color-computational: #0D7377;
  --color-computational-light: #E0F2F2;
  --color-computational-dark: #095B5E;
  --color-systems: #7C3AED;
  --color-systems-light: #EDE9FE;
  --color-systems-dark: #5B21B6;
  --color-human: #D97706;
  --color-human-light: #FEF3C7;
  --color-human-dark: #92400E;
  --color-institutes: #374151;
  --color-institutes-light: #F3F4F6;
  --color-institutes-dark: #111827;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1200px;
}

/* ========== RESET & BASE ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* ========== HEADER ========== */
.site-header {
  background: white url('../assets/banner.png') center/cover no-repeat;
  color: var(--color-text);
  padding: 12rem 0;
  position: relative;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
}

/* ========== NAV BAR ========== */
.nav-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.6rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: flex-end;
}

.header-title {
  display: inline-block;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: 1rem 2rem;
  border-radius: var(--radius-lg);
}

.header-title h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-title .subtitle {
  font-size: 1.1rem;
}

.subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.admin-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.admin-email {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

#btn-admin-panel {
  position: relative;
}

.admin-notification-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  background: #dc3545;
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  line-height: 18px;
  text-align: center;
  border-radius: 9px;
  padding: 0 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

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

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

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

.btn-outline {
  background: rgba(255, 255, 255, 0.7);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.9);
  border-color: var(--color-text-secondary);
}

.btn-text {
  background: transparent;
  color: var(--color-primary);
  padding: 0.3rem 0.6rem;
}

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

.btn-success {
  background: var(--color-success);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: #15803D;
}

.btn-danger {
  background: var(--color-danger);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: #B91C1C;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.btn-full {
  width: 100%;
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-outline-dark:hover:not(:disabled) {
  background: var(--color-bg);
  border-color: var(--color-text-secondary);
}

/* ========== SEARCH SECTION ========== */
.search-section {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 0;
}

.search-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.search-bar {
  position: relative;
  margin-bottom: 0.75rem;
}

.search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  pointer-events: none;
}

#search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color 0.2s;
  background: var(--color-bg);
}

#search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 115, 119, 0.1);
}

.keyword-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.keyword-btn {
  padding: 0.3rem 0.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  font-family: var(--font);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.keyword-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.keyword-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* ========== GROUPS GRID ========== */
.groups-section {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

.groups-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

/* ========== SUBFIELD SECTIONS ========== */
.subfield-section {
  margin-bottom: 1rem;
}

.subfield-section:last-child {
  margin-bottom: 0;
}

.subfield-section.section-hidden {
  display: none;
}

.subfield-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  background: none;
  border: none;
  border-bottom: 2px solid var(--sf-color, var(--color-border));
  padding: 0.75rem 0.5rem;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.2s;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.subfield-header:hover {
  background: var(--sf-color-light, var(--color-primary-light));
}

.subfield-header h2 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--sf-color, var(--color-text));
  margin: 0;
}

.subfield-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 0.4rem;
  border-radius: 999px;
  background: var(--sf-color-light, var(--color-primary-light));
  color: var(--sf-color-dark, var(--color-primary-dark));
  font-size: 0.75rem;
  font-weight: 600;
}

/* Per-subfield colors */
.subfield-section[data-subfield="computational"] {
  --sf-color: var(--color-computational);
  --sf-color-light: var(--color-computational-light);
  --sf-color-dark: var(--color-computational-dark);
}

.subfield-section[data-subfield="systems"] {
  --sf-color: var(--color-systems);
  --sf-color-light: var(--color-systems-light);
  --sf-color-dark: var(--color-systems-dark);
}

.subfield-section[data-subfield="human"] {
  --sf-color: var(--color-human);
  --sf-color-light: var(--color-human-light);
  --sf-color-dark: var(--color-human-dark);
}

.subfield-section[data-subfield="institutes"] {
  --sf-color: var(--color-institutes);
  --sf-color-light: var(--color-institutes-light);
  --sf-color-dark: var(--color-institutes-dark);
}

.subfield-arrow {
  margin-left: auto;
  color: var(--sf-color, var(--color-text-secondary));
  transition: transform 0.2s;
}

.subfield-section.collapsed .subfield-arrow {
  transform: rotate(-90deg);
}

.subfield-section.collapsed .subfield-content {
  display: none;
}

.subfield-content {
  padding-top: 1.5rem;
}

/* ========== INSTITUTE PICKER ========== */
.institute-picker {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.institute-new-fields.hidden {
  display: none;
}

.institute-new-fields {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.institute-new-fields input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
}

.institute-new-fields input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.institute-display {
  padding: 0.65rem 0.85rem;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  min-height: 2.4rem;
}

.institute-warning {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  background: #FEF3C7;
  color: #92400E;
  border: 1px solid #F59E0B;
  margin-bottom: 1rem;
}

.institutes-approved-section {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.institutes-approved-section h4 {
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

/* ========== FORM SELECT ========== */
.form-group select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  transition: border-color 0.2s;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
}

.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 115, 119, 0.1);
}

/* ========== INSTITUTES GRID ========== */
.institutes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

/* Rich institute card (reuses group-card) */
.institute-card-rich {
  border-left: 3px solid var(--color-institutes);
}

.keyword-pill-institute {
  background: var(--color-institutes-light);
  color: var(--color-institutes-dark);
}

/* Active institute filter banner */
.institute-filter-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  margin-bottom: 1rem;
  background: var(--color-institutes-light);
  border: 1.5px solid var(--color-institutes);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-institutes-dark);
}

.institute-filter-banner strong {
  font-weight: 600;
}

.institute-filter-clear {
  margin-left: auto;
  background: none;
  border: none;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-institutes);
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.institute-filter-clear:hover {
  background: rgba(99, 102, 241, 0.15);
}

/* ========== GROUP CARD ========== */
.group-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.group-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.group-card[data-subfield="computational"] {
  border-left: 3px solid var(--color-computational);
}

.group-card[data-subfield="systems"] {
  border-left: 3px solid var(--color-systems);
}

.group-card[data-subfield="human"] {
  border-left: 3px solid var(--color-human);
}

.card-photo {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--color-primary-light);
}

.card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.card-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.keyword-pill {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 500;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.card-name-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.card-name-row .card-name {
  margin-bottom: 0;
}

.card-managed-badge {
  font-size: 0.65rem;
  font-weight: 500;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  background: var(--color-success-light);
  color: var(--color-success);
  white-space: nowrap;
  flex-shrink: 0;
}

.card-unclaimed-badge {
  font-size: 0.65rem;
  font-weight: 500;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  background: #FEF3C7;
  color: #92400E;
  white-space: nowrap;
  flex-shrink: 0;
}

.card-institute {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
  font-style: italic;
}

.card-summary {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 0.75rem;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-link {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.card-link:hover {
  color: var(--color-primary-dark);
}

.card-link::before {
  content: '\2192';
}

/* ========== SUBMISSION AUTH ========== */
.submission-auth {
  background: var(--color-primary-light);
  border: 1.5px solid rgba(13, 115, 119, 0.2);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.auth-toggle {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* ========== CARD EDIT BUTTON ========== */
.card-edit-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 0.75rem;
  margin-top: 0.75rem;
  background: transparent;
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  transition: all 0.2s;
  align-self: flex-start;
}

.card-edit-btn:hover {
  background: var(--color-primary);
  color: white;
}

/* ========== REVIEW META ========== */
.review-meta {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.review-meta p {
  margin-bottom: 0.25rem;
}

/* ========== SUBMIT SECTION ========== */
.submit-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 3rem 0;
}

.submit-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.submit-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-add-group {
  font-size: 1rem;
  padding: 0.75rem 2rem;
}

.submit-inner h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.submit-description {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

/* ========== FORMS ========== */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
}

.required {
  color: var(--color-danger);
}

.hint {
  font-weight: 400;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 115, 119, 0.1);
}

.form-group input[type="file"] {
  font-family: var(--font);
  font-size: 0.85rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.link-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.link-row input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
}

.link-row input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.photo-preview {
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.photo-preview img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.form-message {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.form-message.success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.form-message.error {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.form-message.info {
  background: #1a2a3a;
  color: #6cb4ee;
}

.signup-tip {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 0 0 0.5rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.signup-login-hint {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
}

.signup-login-hint .btn-text {
  font-size: 0.85rem;
  padding: 0;
  text-decoration: underline;
}

.verify-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: #332b00;
  color: #f5c842;
  font-size: 0.85rem;
}

.verify-banner .btn-resend-verify {
  white-space: nowrap;
  background: transparent;
  border: 1px solid #f5c842;
  color: #f5c842;
  cursor: pointer;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.verify-banner .btn-resend-verify:hover {
  background: rgba(245, 200, 66, 0.15);
}

.global-verify-banner {
  margin: 0;
  border-radius: 0;
  padding: 0.6rem 2rem;
  justify-content: center;
}

/* ========== FOOTER ========== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.25rem 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-inner p {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.footer-inner a {
  color: var(--color-text-secondary);
}

.footer-inner a:hover {
  color: var(--color-primary);
}

/* ========== MODALS ========== */
.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;
  overflow-y: auto;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modal-in 0.2s ease;
}

.modal-lg {
  max-width: 700px;
}

@keyframes modal-in {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

.btn-share {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-light);
  cursor: pointer;
  padding: 4px 6px;
  margin-left: auto;
  margin-right: 8px;
  display: flex;
  align-items: center;
  transition: color 0.15s, border-color 0.15s;
}
.btn-share:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-share-copied {
  color: var(--color-success);
  border-color: var(--color-success);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
}

.modal-close:hover {
  color: var(--color-text);
}

.modal-body {
  padding: 1.5rem;
}

/* ========== TABS ========== */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 1.25rem;
}

.tab {
  padding: 0.6rem 1rem;
  border: none;
  background: none;
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  position: relative;
}

.tab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #dc3545;
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  min-width: 16px;
  height: 16px;
  line-height: 16px;
  border-radius: 8px;
  padding: 0 4px;
  margin-left: 4px;
  vertical-align: top;
}

.tab:hover {
  color: var(--color-text);
}

.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* ========== ADMIN LIST ========== */
.admin-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.admin-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  gap: 0.75rem;
}

.admin-item-info {
  flex: 1;
  min-width: 0;
}

.admin-item-name {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-item-meta {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
}

.admin-item-actions {
  display: flex;
  gap: 0.4rem;
  flex-shrink: 0;
}

.add-admin-form {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.add-admin-form h4 {
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.submission-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.submission-detail-field {
  margin-bottom: 0.75rem;
}

.submission-detail-field strong {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.15rem;
}

/* ========== LOADING & EMPTY STATES ========== */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1rem;
  color: var(--color-text-secondary);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-bottom: 0.75rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-secondary);
}

/* ========== UTILITY ========== */
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ========== PI DETAIL MODAL ========== */
.pi-detail-content {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.pi-detail-photo-wrap {
  flex-shrink: 0;
}

.pi-detail-photo {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
}

.pi-detail-info {
  flex: 1;
  min-width: 0;
}

.pi-detail-institute {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 0.35rem;
}

.pi-detail-subfield-badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
}

.pi-detail-subfield-badge[data-subfield="computational"] {
  background: var(--color-computational-light);
  color: var(--color-computational-dark);
}

.pi-detail-subfield-badge[data-subfield="systems"] {
  background: var(--color-systems-light);
  color: var(--color-systems-dark);
}

.pi-detail-subfield-badge[data-subfield="human"] {
  background: var(--color-human-light);
  color: var(--color-human-dark);
}

.pi-detail-summary {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}

.pi-detail-edit-section {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.pi-detail-claim-section {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.pi-detail-claim-hint {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  flex: 1;
  min-width: 200px;
}

.btn-accent {
  background: var(--color-accent);
  color: white;
  padding: 0.5rem 1.2rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-accent:hover:not(:disabled) {
  background: var(--color-accent-dark);
}

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

.pi-detail-claim-pending {
  margin-top: 1.25rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: #FEF3C7;
  color: #92400E;
  font-size: 0.85rem;
  border: 1px solid #F59E0B;
}

.pi-detail-claimed {
  margin-top: 1.25rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-success-light);
  color: var(--color-success);
  font-size: 0.85rem;
  border: 1px solid var(--color-success);
}

/* ========== CLAIM MODAL ========== */
.claim-step {
  margin-bottom: 1.25rem;
}

.claim-step:last-child {
  margin-bottom: 0;
}

.claim-step-label {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

#claim-step-auth {
  background: var(--color-primary-light);
  border: 1.5px solid rgba(13, 115, 119, 0.2);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

/* ========== INSTITUTE DETAIL MODAL ========== */
.inst-detail-content {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.inst-detail-logo-wrap {
  flex-shrink: 0;
}

.inst-detail-logo {
  width: 160px;
  height: 160px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: var(--color-institutes-light);
}

.inst-detail-info {
  flex: 1;
  min-width: 0;
}

.inst-detail-website {
  margin-bottom: 0.35rem;
}

.inst-detail-website a {
  font-size: 0.9rem;
  word-break: break-all;
}

.inst-detail-summary {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}

.inst-detail-view-pis {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

/* ========== CLAIM TYPE BADGE ========== */
.admin-item-type-badge {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  margin-right: 0.25rem;
  vertical-align: middle;
}

.admin-item-type-badge--pi {
  background: var(--color-computational-light);
  color: var(--color-computational-dark);
}

.admin-item-type-badge--institute {
  background: var(--color-institutes-light);
  color: var(--color-institutes-dark);
}

/* ========== SUBFIELD PICKER (dropdown + checkboxes) ========== */
.secondary-subfields {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.secondary-label {
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

.subfield-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--color-text);
}

.subfield-checkbox input[type="checkbox"] {
  accent-color: var(--color-primary);
  width: 0.95rem;
  height: 0.95rem;
  cursor: pointer;
}

/* ========== INSTITUTE PILLS ========== */
.institute-picker-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.institute-picker-row select {
  flex: 1;
}

.institute-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.institute-pills:empty {
  display: none;
}

.institute-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  background: var(--color-institutes-light);
  color: var(--color-institutes-dark);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
}

.institute-pill-remove {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  color: var(--color-institutes-dark);
  padding: 0;
  opacity: 0.7;
}

.institute-pill-remove:hover {
  opacity: 1;
}

/* ========== MULTIPLE SUBFIELD BADGES ========== */
.pi-detail-subfields {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* ========== MANAGED-BY & REPORT ========== */
.managed-by-badge {
  margin-top: 1.25rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-success-light);
  color: var(--color-success);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--color-success);
}

.managed-by-email {
  font-weight: 400;
  opacity: 0.8;
}

.btn-revoke-claim {
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 0.75rem;
  background: transparent;
  color: #dc3545;
  border: 1px solid #dc3545;
  border-radius: 4px;
  cursor: pointer;
  vertical-align: middle;
}
.btn-revoke-claim:hover {
  background: #dc3545;
  color: #fff;
}
.btn-revoke-claim:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.unclaimed-warning {
  margin-top: 1.25rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: #FEF3C7;
  color: #92400E;
  font-size: 0.85rem;
  border: 1px solid #F59E0B;
}

.report-section {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.report-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: none;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0.35rem 0.75rem;
  transition: all 0.2s;
}

.report-toggle-btn:hover {
  color: var(--color-danger);
  border-color: var(--color-danger);
}

.report-form {
  margin-top: 0.75rem;
}

.report-textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  resize: vertical;
  margin-bottom: 0.5rem;
}

.report-textarea:focus {
  outline: none;
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .site-header {
    padding: 5rem 0;
  }

  .header-title h1 {
    font-size: 1.75rem;
  }

  .groups-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .link-row {
    grid-template-columns: 1fr;
  }

  .admin-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .admin-item-actions {
    width: 100%;
  }

  .submission-actions {
    flex-direction: column;
  }

  .pi-detail-content {
    flex-direction: column;
  }

  .pi-detail-photo {
    width: 100%;
    max-width: 200px;
    height: auto;
    aspect-ratio: 1;
  }

  .inst-detail-content {
    flex-direction: column;
  }

  .inst-detail-logo {
    width: 100%;
    max-width: 160px;
    height: auto;
    aspect-ratio: 1;
  }

  .institutes-grid {
    grid-template-columns: 1fr;
  }
}