/* ===========================================
   IDS Hackathon 2026 Participants
   Color Scheme:
   - Dark Green: #011400 (background)
   - Neon Green: #4AFF7A (accent, buttons)
   - White: #FFFFFF (text)
   - Neon Yellow: #FFFF00 (focus indicators)
   =========================================== */

/* Import Atkinson Hyperlegible font */
@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:ital,wght@0,400;0,700;1,400;1,700&display=swap');

/* CSS Custom Properties */
:root {
  --color-dark-green: #011400;
  --color-neon-green: #4AFF7A;
  --color-white: #FFFFFF;
  --color-neon-yellow: #FFFF00;
  
  /* Derived colors */
  --color-dark-green-light: rgba(74, 255, 122, 0.05);
  --color-neon-green-dark: #18c93e;
  --color-overlay: rgba(3, 29, 0, 0.9);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Grid layout - default values (overridden by media queries) */
  --grid-cols: 4;
  --grid-rows: 3;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Ensure buttons, inputs, and other form elements inherit the font */
button,
input,
select,
textarea {
  font-family: inherit;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: #011400; /* dark green - full page */
}

body {
  font-family: 'Atkinson Hyperlegible', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-weight: 400;
  background-color: #011400; /* dark green - matches var(--color-dark-green) */
  color: var(--color-white);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Focus Styles - Neon Yellow */
:focus-visible {
  outline: 3px solid var(--color-neon-yellow);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-neon-green);
  color: var(--color-dark-green);
  font-weight: 400;
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--spacing-md);
}

/* Visually Hidden (for screen readers) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
header {
  padding: var(--spacing-md) var(--spacing-md);
  border-bottom: 1px solid var(--color-dark-green-light);
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  position: relative;
}

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

/* Header Back Link */
.header-back-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--color-white);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
  margin-right: var(--spacing-md);
}

.header-back-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}

.header-back-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

header h1 {
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.subtitle {
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
  color: var(--color-white);
  opacity: 0.85;
  margin-top: var(--spacing-xs);
  font-weight: 400;
}

.subtitle a {
  color: var(--color-neon-green);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.subtitle a:hover {
  color: var(--color-neon-green-dark);
}

/* Main Content */
main {
  flex: 1;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Card Grid - Fills the screen with fixed columns/rows based on breakpoint */
.card-grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols, 4), 1fr);
  grid-template-rows: repeat(var(--grid-rows, 3), 1fr);
  gap: var(--spacing-md);
  width: 100%;
  height: 100%;
  flex: 1;
}

/* Card Base Styles - All cards are the same size */
.card {
  background-color: var(--color-dark-green-light);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 0;
  height: 100%;
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  border: 1px solid var(--color-neon-green);
  transform: translateY(-4px);
  box-shadow: none;
}

/* Card as interactive element - focus shows whole card as button */
.card:focus-visible {
  outline: 3px solid var(--color-neon-yellow);
  outline-offset: 2px;
  border-color: var(--color-neon-green);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(31, 237, 77, 0.25);
}

/* Card Avatar */
.card-avatar {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  overflow: hidden;
  background-color: var(--color-dark-green);
  flex-shrink: 0;
}

.card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Card Name */
.card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0;
  letter-spacing: 0.02em;
}

/* Card Links */
.card-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: center;
  margin-top: var(--spacing-xs);
}

.card-links a {
  color: var(--color-neon-green);
  text-decoration: underline;
  font-size: 0.875rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.card-links a:hover {
  background-color: var(--color-neon-green);
  color: var(--color-dark-green);
  text-decoration: none;
}

/* Empty Card - Subtle dashed border for empty state */
.card--empty {
  border: 1px dashed rgba(255, 255, 255, 0.2);
  justify-content: center;
  cursor: pointer;
  background-color: transparent;
}

.card--empty:hover {
  border: 1px solid var(--color-neon-green);
  transform: translateY(-2px);
  box-shadow: none;
  background-color: rgba(255, 255, 255, 0.02);
}

.card--empty:focus-visible {
  outline: 3px solid var(--color-neon-yellow);
  outline-offset: 2px;
  border-color: var(--color-neon-green);
}

.empty-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Placeholder avatar for empty state */
.empty-placeholder {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.3);
}

.empty-placeholder svg {
  width: 32px;
  height: 32px;
}

.empty-text {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  font-weight: 400;
}

/* Secondary button style for add button */
.add-btn {
  background-color: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-size: 0.85rem;
  font-weight: 400;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
}

.add-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  transform: scale(1.02);
}

/* Remove focus from inner button since card is the interactive element */
.card--empty .add-btn {
  pointer-events: none;
}

.card--empty .add-btn:focus {
  outline: none;
}

/* Center Card - Slightly more prominent than other empty cards */
.card--center {
  border-color: rgba(255, 255, 255, 0.25);
}

.card--center .empty-placeholder {
  background-color: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.4);
}

.card--center .empty-text {
  color: rgba(255, 255, 255, 0.6);
}

/* Center banner card - hackathon thumbnail image only, same borders as other cards */
.card--banner {
  padding: 0;
  border: 1px solid transparent;
  background: linear-gradient(to bottom, #041D01, #063F01);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.card--banner:hover {
  border-color: var(--color-neon-green);
  transform: translateY(-4px);
}

.card-banner-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  min-height: 0;
  text-decoration: none;
  border-radius: inherit;
  transition: box-shadow var(--transition-fast);
}

.card-banner-link:hover {
  box-shadow: none;
}

/* Same focus style as other cards: neon yellow outline, 3px, 2px offset */
.card-banner-link:focus {
  outline: none;
}

.card-banner-link:focus-visible {
  outline: 3px solid var(--color-neon-yellow);
  outline-offset: 2px;
}

.card-banner-link:focus:not(:focus-visible) {
  outline: none;
}

.card-banner-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* Registration closed empty cards - not interactive */
.card--registration-closed {
  cursor: default;
}

.card--registration-closed:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background-color: transparent;
}

/* Secondary Button (used in headers) */
.btn-secondary {
  position: absolute;
  top: 50%;
  right: var(--spacing-md);
  transform: translateY(-50%);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-lg);
  color: var(--color-white);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 400;
  text-decoration: none;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-50%) scale(1.02);
}

.btn-secondary:active {
  transform: translateY(-50%) scale(0.98);
}

/* Refresh Button in Header */
.refresh-btn {
  position: absolute;
  top: 50%;
  right: var(--spacing-md);
  transform: translateY(-50%);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  background-color: var(--color-neon-green);
  color: var(--color-dark-green);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: 400;
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  z-index: 100;
}

.refresh-btn:hover {
  background-color: var(--color-neon-green-dark);
  transform: translateY(-50%) scale(1.02);
  box-shadow: 0 4px 12px rgba(31, 237, 77, 0.3);
}

.refresh-btn:active {
  transform: translateY(-50%) scale(0.98);
}

.refresh-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.refresh-btn-text {
  white-space: nowrap;
}

/* Refresh animation */
.refresh-btn.refreshing svg {
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Full Screen Form Page */
.form-page {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-dark-green);
  z-index: 1000;
  display: block;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
  overflow-y: auto;
}

.form-page:not([hidden]) {
  opacity: 1;
  visibility: visible;
}

.form-page[hidden] {
  display: block;
}

/* Prevent body scroll when form is open */
body:has(.form-page:not([hidden])) {
  overflow: hidden;
}

/* Form Page Header */
.form-page-header {
  display: flex;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  gap: var(--spacing-md);
}

.form-page-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  flex: 1;
  letter-spacing: 0.02em;
}

/* Back Button */
.back-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--color-white);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 400;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.back-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}

.back-btn svg {
  width: 20px;
  height: 20px;
}

/* Form View Container */
.form-view-container {
  display: flex;
  justify-content: center;
  padding: var(--spacing-xl);
  padding-bottom: 4rem;
}

/* Form Styles */
#participant-form {
  width: 100%;
  max-width: 560px;
  padding: var(--spacing-lg);
}

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

.field label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--color-white);
}

/* Optional label indicator - italic style */
.optional-label {
  font-style: italic;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.6);
  margin-left: var(--spacing-xs);
}

/* Required indicator asterisk */
.required-indicator {
  color: var(--color-neon-green);
  margin-left: var(--spacing-xs);
}

.field input[type="text"],
.field input[type="url"],
.field input[type="email"] {
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-dark-green);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--color-white);
  font-size: 1rem;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.field input[type="text"]:hover,
.field input[type="url"]:hover,
.field input[type="email"]:hover {
  border-color: rgba(255, 255, 255, 0.4);
}

.field input[type="text"]:focus,
.field input[type="url"]:focus,
.field input[type="email"]:focus {
  border-color: var(--color-neon-green);
  background-color: rgba(31, 237, 77, 0.05);
}

.field input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

/* File Input */
.field input[type="file"] {
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-dark-green);
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--color-white);
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.field input[type="file"]:hover {
  border-color: rgba(255, 255, 255, 0.4);
}

.field input[type="file"]::file-selector-button {
  background-color: var(--color-neon-green);
  color: var(--color-dark-green);
  border: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-weight: 400;
  cursor: pointer;
  margin-right: var(--spacing-md);
  transition: background-color var(--transition-fast);
}

.field input[type="file"]::file-selector-button:hover {
  background-color: var(--color-neon-green-dark);
}

/* Hint Text - positioned below label, before input */
.hint {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
}

/* Error Message */
.error-message {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: 0.85rem;
  color: #ff6b6b;
}

.error-message:not([hidden])::before {
  content: "⚠ ";
}

/* Field Error State */
.field--error input {
  border-color: #ff6b6b !important;
}

/* Form Actions */
.form-actions {
  margin-top: var(--spacing-xl);
}

/* Submit Button */
.submit-btn {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-neon-green);
  color: var(--color-dark-green);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 400;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  position: relative;
}

.submit-btn:hover:not(:disabled) {
  background-color: var(--color-neon-green-dark);
  transform: translateY(-2px);
}

.submit-btn:active:not(:disabled) {
  transform: translateY(0);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}


/* Success View */
.success-view {
  padding: var(--spacing-xl);
  text-align: center;
  display: flex;
  justify-content: center;
}

.success-view[hidden] {
  display: none;
}

.success-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
  width: 100%;
  max-width: 560px;
  padding: 0 var(--spacing-lg);
}

.success-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background-color: var(--color-neon-green);
  color: var(--color-dark-green);
  font-size: 2.5rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pop 0.4s ease;
}

@keyframes pop {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.success-view h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
}

.success-view p {
  color: rgba(255, 255, 255, 0.8);
}

.redirect-message {
  font-size: 0.875rem;
  color: var(--color-neon-green);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Highlighted Card (for newly added participant) */
.card--highlighted {
  animation: highlightPop 0.6s ease-out, highlightGlow 2s ease-in-out 0.6s;
  box-shadow: 0 0 20px rgba(31, 237, 77, 0.4), 0 0 40px rgba(31, 237, 77, 0.2);
  border: 1px solid var(--color-neon-green);
}

@keyframes highlightPop {
  0% { 
    transform: scale(0.8);
    opacity: 0;
  }
  50% { 
    transform: scale(1.05);
  }
  100% { 
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes highlightGlow {
  0%, 100% { 
    box-shadow: 0 0 20px rgba(31, 237, 77, 0.4), 0 0 40px rgba(31, 237, 77, 0.2);
  }
  50% { 
    box-shadow: 0 0 30px rgba(31, 237, 77, 0.6), 0 0 60px rgba(31, 237, 77, 0.3);
  }
}

/* Footer */
footer {
  padding: var(--spacing-sm) var(--spacing-md);
  border-top: 1px solid var(--color-dark-green-light);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-dark-green);
}

/* Desktop layout: fit everything in viewport (screens 700px and wider) */
@media (min-width: 700px) {
  body {
    height: 100vh;
    overflow: hidden;
  }
  
  main {
    min-height: 0;
    overflow: hidden;
  }
}

footer p {
  text-align: center;
  flex: 1;
}

.footer-link {
  color: var(--color-neon-green);
  text-decoration: underline;
  font-size: 0.75rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.footer-link:hover {
  background-color: var(--color-neon-green);
  color: var(--color-dark-green);
  text-decoration: none;
}

.footer-link--left {
  margin-right: auto;
}

.footer-link--right {
  margin-left: auto;
}

/* Loading State for Cards */
.card--loading {
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Card Entry Animation */
.card {
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =============================================
   Responsive Grid Breakpoints
   Cards always fill the screen at each breakpoint
   ============================================= */

/* Extra large screens (1400px+): 5 columns x 3 rows = 15 cards */
@media (min-width: 1400px) {
  :root {
    --grid-cols: 5;
    --grid-rows: 3;
  }
}

/* Large screens (1200px - 1399px): 4 columns x 3 rows = 12 cards */
@media (min-width: 1200px) and (max-width: 1399px) {
  :root {
    --grid-cols: 4;
    --grid-rows: 3;
  }
}

/* Medium-large screens (900px - 1199px): 4 columns x 3 rows = 12 cards */
@media (min-width: 900px) and (max-width: 1199px) {
  :root {
    --grid-cols: 4;
    --grid-rows: 3;
  }
}

/* Medium screens (700px - 899px): 3 columns x 3 rows = 9 cards */
@media (min-width: 700px) and (max-width: 899px) {
  :root {
    --grid-cols: 3;
    --grid-rows: 3;
  }
}

/* Small screens (500px - 699px): 2 columns x 4 rows = 8 cards */
@media (min-width: 500px) and (max-width: 699px) {
  :root {
    --grid-cols: 2;
    --grid-rows: 4;
  }
}

/* Extra small screens (<500px): 2 columns x 4 rows = 8 cards */
@media (max-width: 499px) {
  :root {
    --grid-cols: 2;
    --grid-rows: 4;
  }
  
  header {
    padding: var(--spacing-sm) var(--spacing-sm);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }
  
  header h1 {
    font-size: 1.1rem;
  }
  
  .subtitle {
    font-size: 0.7rem;
    text-align: left;
    margin-top: var(--spacing-xs);
  }
  
  .refresh-btn,
  .btn-secondary {
    position: static;
    transform: none;
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    align-self: flex-start;
    margin-top: var(--spacing-xs);
  }
  
  .header-back-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
    margin-right: var(--spacing-sm);
  }
  
  .header-back-link svg {
    width: 16px;
    height: 16px;
  }
  
  .refresh-btn:hover,
  .btn-secondary:hover {
    transform: scale(1.02);
  }
  
  .refresh-btn:active,
  .btn-secondary:active {
    transform: scale(0.98);
  }
  
  .refresh-btn svg {
    width: 16px;
    height: 16px;
  }
  
  main {
    padding: var(--spacing-sm);
  }
  
  .card-grid {
    gap: var(--spacing-sm);
  }
  
  .card {
    padding: var(--spacing-sm);
  }
  
  .card-avatar {
    width: 56px;
    height: 56px;
    font-size: 1.75rem;
  }
  
  .card-name {
    font-size: 0.85rem;
  }
  
  .card-links a {
    font-size: 0.75rem;
    padding: 2px var(--spacing-xs);
  }
  
  .empty-placeholder {
    width: 48px;
    height: 48px;
  }
  
  .empty-placeholder svg {
    width: 24px;
    height: 24px;
  }
  
  .empty-text {
    font-size: 0.7rem;
  }
  
  .add-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.7rem;
  }
  
  .form-page-header {
    padding: var(--spacing-md);
  }
  
  .form-page-header h2 {
    font-size: 1.1rem;
  }
  
  .back-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
  }
  
  .back-btn svg {
    width: 16px;
    height: 16px;
  }
  
  .form-view-container {
    padding: var(--spacing-md);
  }
  
  #participant-form {
    padding: var(--spacing-sm);
  }
  
  footer {
    padding: var(--spacing-sm);
    font-size: 0.7rem;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  footer p {
    order: 1;
    text-align: left;
    margin-top: var(--spacing-xs);
  }
  
  .footer-link {
    font-size: 0.65rem;
    padding: 2px var(--spacing-xs);
  }
  
  .footer-link--right {
    margin-left: 0;
  }
}

/* Tablet portrait adjustments */
@media (min-width: 500px) and (max-width: 899px) {
  .card-avatar {
    width: 72px;
    height: 72px;
    font-size: 2.25rem;
  }
  
  .empty-placeholder {
    width: 56px;
    height: 56px;
  }
  
  .empty-placeholder svg {
    width: 28px;
    height: 28px;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .card {
    border: 1px solid var(--color-white);
  }
  
  .card--empty {
    border-style: dashed;
    border-color: var(--color-white);
  }
  
  .field input {
    border-width: 3px;
  }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* =============================================
   All Participants Page Styles
   ============================================= */

/* Simple scrollable page - let body scroll naturally */
body:has(.all-participants-main) {
  height: auto !important;
  min-height: 100vh;
  overflow: auto !important;
}

.all-participants-main {
  flex: 1 0 auto;
  overflow: visible;
  min-height: auto;
  padding-bottom: 4rem;
}

/* Grid without fixed height - flows naturally */
.card-grid--all {
  grid-template-rows: auto;
  height: auto;
  flex: none;
}

/* Fixed card height for all-participants page */
.card-grid--all .card {
  height: auto;
  min-height: 200px;
  padding: var(--spacing-lg);
}

@media (max-width: 499px) {
  .card-grid--all .card {
    min-height: 160px;
    padding: var(--spacing-md);
  }
}

/* =============================================
   All Projects Page Styles
   ============================================= */

/* Simple scrollable page - let body scroll naturally */
body:has(.all-projects-main) {
  height: auto !important;
  min-height: 100vh;
  overflow: auto !important;
}

.all-projects-main {
  flex: 1 0 auto;
  overflow: visible;
  min-height: auto;
  padding: var(--spacing-lg);
  padding-bottom: 4rem;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

/* Projects list */
.projects-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Project card - contains title and links */
.project-card {
  background-color: var(--color-dark-green-light);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  animation: fadeIn 0.3s ease-out forwards;
  opacity: 0;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.project-card:hover {
  border: 1px solid var(--color-neon-green);
  box-shadow: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Project card title */
.project-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  margin: 0 0 var(--spacing-md) 0;
  letter-spacing: 0.02em;
}

/* Links list within each card */
.project-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.project-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: 0.95rem;
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
}

.project-url {
  color: var(--color-neon-green);
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.project-link:hover {
  border-color: var(--color-neon-green);
  background-color: rgba(74, 255, 122, 0.08);
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(31, 237, 77, 0.15);
}

.project-link:focus-visible {
  outline: 3px solid var(--color-neon-yellow);
  outline-offset: 2px;
  border-color: var(--color-neon-green);
  background-color: rgba(74, 255, 122, 0.08);
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(31, 237, 77, 0.25);
}

.projects-list .empty-message,
.projects-list .error-message {
  text-align: center;
  padding: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.6);
}

.projects-list .error-message {
  color: #ff6b6b;
}

@media (max-width: 499px) {
  .all-projects-main {
    padding: var(--spacing-md);
  }
  
  .project-card {
    padding: var(--spacing-md);
  }
  
  .project-card-title {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
  }
  
  .project-link {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
  }
  
  .project-url {
    width: 100%;
    max-width: 100%;
  }
}