/* CSS Variables for easy theme customization */
:root {
  /* Colors - Blue Theme */
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary-color: #0ea5e9;
  --secondary-dark: #0284c7;

  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;

  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --bg-tag: #dbeafe;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  --border-color: #e8e8e8;
  --border-radius: 8px;
  --border-radius-sm: 4px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  line-height: 1.6;
}

/* Navigation */
.nav {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-link.active {
  color: var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
}

/* Hamburger Menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 101;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background-color: var(--primary-color);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Container */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.container-narrow {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

/* Typography */
h1 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

h2 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

/* Sections */
.section {
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--primary-color);
  border-bottom: 2px solid var(--primary-light);
  padding-bottom: var(--spacing-sm);
}

/* Profile Photo and Bio */
.bio-header {
  display: flex;
  gap: var(--spacing-xl);
  align-items: flex-start;
  margin-bottom: var(--spacing-lg);
}

.profile-photo {
  width: 180px;
  height: 180px;
  border-radius: 24px;
  object-fit: cover;
  object-position: center 20%;  /* Move image down - show more of the top */
  flex-shrink: 0;
}

.bio-content {
  flex: 1;
  min-width: 0;  /* Allows text to wrap properly */
}

.bio-content h1 {
  margin-top: 0;
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-meta {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.card-authors {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.card-description {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.card-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  font-family: var(--font-family);
}

.btn:active {
  transform: scale(0.98);
}

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

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

.btn-secondary {
  background-color: white;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

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

.btn-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--font-size-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: color 0.2s;
  margin-top: var(--spacing-sm);
}

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

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-pill {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
  border-radius: 999px;
  background-color: var(--bg-tag);
  color: var(--text-primary);
  border: 1px solid transparent;
  transition: all 0.2s;
}

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

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

.btn-pill-award {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: 999px;
  background-color: #fef3c7;
  color: #78350f;
  border: 1px solid #fbbf24;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-family);
}

.btn-pill-award:hover {
  background-color: #fde68a;
}

.btn-pill-award.active {
  background-color: #f59e0b;
  color: white;
  border-color: #b45309;
}

/* Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  background-color: var(--bg-tag);
  color: var(--text-primary);
  border-radius: 999px;
}

/* Under Submission Badge */
.badge-under-submission {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  background-color: #fef3c7;
  color: #92400e;
  border: 1px solid #fbbf24;
  border-radius: var(--border-radius-sm);
  margin-right: 4px;
}

/* Awards */
.awards {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.award-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  color: #78350f;
  border: 1px solid #fbbf24;
  border-radius: var(--border-radius-sm);
  box-shadow: 0 1px 3px rgba(251, 191, 36, 0.3);
}

/* Search Bar */
.search-bar {
  margin-bottom: var(--spacing-lg);
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: var(--spacing-md);
  color: var(--text-secondary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 2.5rem;
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input::placeholder {
  color: var(--text-light);
}

.search-clear {
  position: absolute;
  right: var(--spacing-md);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  transition: background-color 0.2s, color 0.2s;
}

.search-clear:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

/* Filter Section */
.filter-section {
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.filter-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-lg);
}

.modal, .modal-content {
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.modal-header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  background-color: var(--bg-primary);
  z-index: 10;
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  padding-right: var(--spacing-2xl);
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1;
  padding: var(--spacing-xs);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  transition: background-color 0.2s;
}

.modal-close:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-xl);
}

.modal-section {
  margin-bottom: var(--spacing-lg);
}

.modal-section-title {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.modal-list {
  list-style: disc;
  margin-left: var(--spacing-xl);
  color: var(--text-primary);
}

.modal-list li {
  margin-bottom: var(--spacing-sm);
}

/* Project Cards */
.project-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.project-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.project-description {
  color: var(--text-primary);
  line-height: 1.5;
}

/* Links */
.link-list {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.link-item a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.link-item a:hover {
  color: var(--secondary-dark);
  text-decoration: underline;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

/* Responsive */
@media (max-width: 768px) {
  /* Navigation */
  .nav-container {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
    order: 2;
  }

  .nav-brand {
    order: 1;
    font-size: var(--font-size-lg);
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    order: 3;
    gap: 0;
    margin-top: var(--spacing-md);
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-link {
    display: block;
    padding: var(--spacing-md);
    border-bottom: none !important;
  }

  .nav-link.active {
    background-color: var(--bg-secondary);
  }

  /* Typography */
  h1 {
    font-size: var(--font-size-2xl);
  }

  h2 {
    font-size: var(--font-size-xl);
  }

  h3 {
    font-size: var(--font-size-lg);
  }

  /* Containers */
  .container, .container-narrow {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .section {
    padding: var(--spacing-lg);
  }

  /* Links */
  .link-list {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  /* Cards */
  .card {
    padding: var(--spacing-md);
  }

  .card-actions {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .card-actions .btn {
    width: 100%;
    text-align: center;
  }

  /* Tags and Filters */
  .filter-section {
    padding: var(--spacing-md);
  }

  .filter-tags {
    gap: var(--spacing-xs);
  }

  .btn-pill, .btn-pill-award {
    font-size: 0.8rem;
    padding: 4px 10px;
  }

  .tags {
    gap: var(--spacing-xs);
  }

  .tag {
    font-size: 0.7rem;
    padding: 2px 6px;
  }

  /* Modals - Full Screen */
  .modal-overlay {
    padding: 0;
    align-items: stretch;
    justify-content: stretch;
  }

  .modal, .modal-content {
    max-width: 100%;
    width: 100%;
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
    margin: 0;
  }

  .modal-header {
    padding: var(--spacing-md);
  }

  .modal-body {
    padding: var(--spacing-md);
  }

  .modal-title {
    font-size: var(--font-size-lg);
    padding-right: var(--spacing-xl);
  }

  /* Chat Modal - Full Screen */
  .modal-content.chat-modal {
    width: 100vw !important;
    max-width: 100vw !important;
    /* Use dvh (dynamic viewport height) instead of vh for iOS Safari */
    /* This accounts for the dynamic browser chrome (address bar, etc.) */
    height: 100dvh !important;
    max-height: 100dvh !important;
    border-radius: 0 !important;
    margin: 0 !important;
  }

  .chat-header {
    padding: var(--spacing-sm) var(--spacing-md) 6px var(--spacing-md) !important;
    flex-shrink: 0;
    gap: var(--spacing-sm) !important;
  }

  .chat-header h2 {
    font-size: var(--font-size-base) !important;
    margin-bottom: 0 !important;
  }

  .chat-paper-title {
    font-size: 0.75rem !important;
    line-height: 1.2 !important;
    margin-top: 2px !important;
  }

  .chat-status-bar {
    flex-shrink: 0;
    padding: 4px var(--spacing-md);
    font-size: 0.75rem;
  }

  .chat-messages {
    flex: 1;
    min-height: 0;
    max-height: none;
    padding: var(--spacing-md);
  }

  .chat-input-container {
    padding: var(--spacing-md);
    flex-shrink: 0;
  }

  .chat-input {
    min-height: 50px;
    max-height: 100px;
    font-size: var(--font-size-sm);
  }

  .chat-send-btn {
    padding: var(--spacing-sm);
    min-width: 40px;  /* Smaller width for icon-only button */
  }

  .chat-send-btn-text {
    display: none;  /* Hide "Send" text on mobile, show only icon */
  }

  .chat-message {
    gap: var(--spacing-sm);
  }

  .chat-message-icon {
    width: 28px;
    height: 28px;
    font-size: 9px;
  }

  .chat-message-content {
    padding: var(--spacing-sm);
    font-size: var(--font-size-sm);
  }

  .canned-questions-container {
    padding: 4px var(--spacing-md) !important;
    flex-shrink: 0;
  }

  .canned-questions-select {
    font-size: 0.75rem !important;
    padding: 4px var(--spacing-sm) !important;
  }

  .chat-error {
    flex-shrink: 0;
  }

  /* Search Bar */
  .search-input {
    font-size: var(--font-size-sm);
  }

  /* Profile Photo - Mobile */
  .bio-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-photo {
    width: 120px;
    height: 120px;
    margin-bottom: var(--spacing-md);
  }

  .bio-content {
    width: 100%;
  }
}

/* Tablet Responsive (768px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  .container {
    max-width: 900px;
  }

  .card-actions {
    flex-wrap: wrap;
  }

  .chat-modal {
    width: 90%;
  }
}

/* ============================================================================
   Chat Modal Styles
   ============================================================================ */

.chat-modal {
  width: 700px;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  /* Use CSS variable set by useVirtualKeyboardHeight hook */
  padding-bottom: var(--keyboard-height, 0);
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.chat-header h2 {
  margin: 0;
  color: var(--primary-color);
}

.chat-paper-title {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  line-height: 1.4;
}

.btn-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: var(--text-secondary);
  transition: color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  line-height: 1;
}

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

.chat-status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-height: 60vh;
  /* Momentum scrolling for better iOS experience */
  -webkit-overflow-scrolling: touch;
}

.chat-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-2xl);
  color: var(--text-secondary);
  text-align: center;
}

.canned-questions-container {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.canned-questions-select {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  cursor: pointer;
  transition: border-color 0.2s;
}

.canned-questions-select:hover {
  border-color: var(--primary-color);
}

.canned-questions-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}


.chat-message {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

.chat-message-user {
  flex-direction: row-reverse;
}

.chat-message-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 600;
}

.chat-message-user .chat-message-icon {
  background-color: var(--primary-color);
  color: white;
}

.chat-message-assistant .chat-message-icon {
  background-color: var(--bg-card);
  color: var(--primary-color);
  border: 1px solid var(--border-color);
}

.chat-message-content {
  flex: 1;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  line-height: 1.6;
}

.chat-message-user .chat-message-content {
  background-color: #bfdbfe;
  color: white;
}

.chat-message-assistant .chat-message-content {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

/* Markdown rendering in chat messages */
.chat-message-content h1,
.chat-message-content h2,
.chat-message-content h3,
.chat-message-content h4,
.chat-message-content h5,
.chat-message-content h6 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.chat-message-content h1:first-child,
.chat-message-content h2:first-child,
.chat-message-content h3:first-child,
.chat-message-content h4:first-child,
.chat-message-content h5:first-child,
.chat-message-content h6:first-child {
  margin-top: 0;
}

.chat-message-content p {
  margin-bottom: var(--spacing-sm);
}

.chat-message-content p:last-child {
  margin-bottom: 0;
}

.chat-message-content ul,
.chat-message-content ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.chat-message-content li {
  margin-bottom: var(--spacing-xs);
}

.chat-message-content code {
  background-color: rgba(0, 0, 0, 0.1);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
}

.chat-message-user .chat-message-content code {
  background-color: rgba(255, 255, 255, 0.2);
}

.chat-message-content pre {
  background-color: rgba(0, 0, 0, 0.05);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin-bottom: var(--spacing-sm);
}

.chat-message-content pre code {
  background-color: transparent;
  padding: 0;
}

.chat-message-content blockquote {
  border-left: 3px solid var(--primary-color);
  padding-left: var(--spacing-md);
  margin-left: 0;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

.chat-typing-indicator {
  display: flex;
  gap: 4px;
  padding: var(--spacing-sm) 0;
}

.chat-typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-light);
  animation: typing 1.4s infinite;
}

.chat-typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.chat-typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    opacity: 0.3;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-8px);
  }
}

.chat-error {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: #fee;
  color: #c33;
  border-top: 1px solid #fcc;
  font-size: var(--font-size-sm);
}

.chat-input-container {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  /* Respect iPhone home bar area */
  padding-bottom: max(var(--spacing-lg), env(safe-area-inset-bottom));
}

.chat-input {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  resize: vertical;
  min-height: 60px;
  max-height: 150px;
}

.chat-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.chat-input:disabled {
  background-color: var(--bg-secondary);
  cursor: not-allowed;
}

.chat-send-btn {
  align-self: flex-end;
  min-width: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}