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

:root {
  --primary: #1a1a6e;
  --primary-dark: #0e0e4a;
  --primary-light: #2d2d9e;
  --accent: #c8a951;
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --danger: #dc2626;
  --success: #16a34a;
  --google-blue: #4285f4;
  --facebook-blue: #1877f2;
  --twitter-black: #000000;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 960px;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 1.15rem;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

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

.btn-large {
  padding: 16px 36px;
  font-size: 1.2rem;
  width: 100%;
}

.btn-donate-header {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
  padding: 10px 24px;
  font-size: 1.05rem;
}

.btn-donate-header:hover {
  background: #b8993f;
  border-color: #b8993f;
}

/* ===== Top Bar ===== */
.top-bar {
  background: var(--primary);
  color: var(--white);
  padding: 10px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.top-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.top-bar-logo {
  height: 80px;
  width: auto;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.social-icons {
  display: flex;
  gap: 16px;
}

.social-icon {
  color: var(--white);
  opacity: 0.85;
  transition: opacity 0.2s;
  display: flex;
  align-items: center;
}

.social-icon svg {
  width: 28px;
  height: 28px;
}

.social-icon:hover {
  opacity: 1;
}

/* ===== Hero Section ===== */
.hero {
  background: var(--gray-50);
  padding: 40px 20px;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

/* Carousel */
.carousel {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16 / 10;
  background: var(--primary-dark);
}

.carousel-track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.5s ease-in-out;
}

.carousel-slide .placeholder-content {
  color: var(--white);
  text-align: center;
  padding: 20px;
}

.placeholder-content h2 {
  font-size: 2.4rem;
  margin-bottom: 8px;
  font-weight: 700;
}

.placeholder-content p {
  font-size: 1.3rem;
  opacity: 0.9;
}

.placeholder-content .year-range {
  font-size: 2.1rem;
  font-weight: 700;
  margin: 8px 0;
  color: var(--accent);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.4);
  color: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-btn:hover {
  background: rgba(0, 0, 0, 0.6);
}

.carousel-prev {
  left: 10px;
}

.carousel-next {
  right: 10px;
}

.carousel-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid white;
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: background 0.2s;
}

.dot.active {
  background: white;
}

/* Hero Right */
.hero-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: center;
}

.total-raised {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.total-raised .amount {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
}

.total-raised .label {
  font-size: 1.05rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* ===== Carousel Slide Backgrounds ===== */
.carousel-slide {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-slide-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.carousel-slide-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 60, 0.55);
  z-index: 1;
}

.carousel-slide .placeholder-content {
  position: relative;
  z-index: 2;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

/* ===== Photo Filmstrip ===== */
.filmstrip-section {
  padding: 32px 0 0;
  background: var(--white);
  overflow: hidden;
}

.filmstrip-title {
  font-size: 1.6rem;
  color: var(--gray-900);
  text-align: center;
  margin-bottom: 20px;
}

.filmstrip-track {
  display: flex;
  width: max-content;
  animation: filmstrip-scroll 40s linear infinite;
}

.filmstrip-track:hover {
  animation-play-state: paused;
}

.filmstrip-scroll {
  display: flex;
  gap: 10px;
  padding-right: 10px;
}

.filmstrip-frame {
  flex-shrink: 0;
  width: 220px;
  height: 150px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.filmstrip-frame:hover {
  transform: scale(1.06);
  box-shadow: var(--shadow-lg);
  z-index: 1;
}

.filmstrip-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@keyframes filmstrip-scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* ===== Tabs ===== */
.tabs-section {
  padding: 0 20px;
}

.tabs-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.tab-nav {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tab-nav::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  background: none;
  border: none;
  padding: 16px 24px;
  font-family: var(--font-family);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  white-space: nowrap;
}

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

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.tab-panels {
  padding: 32px 0 48px;
}

.tab-panel {
  display: none;
}

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

.tab-panel h2 {
  font-size: 1.7rem;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.tab-panel > p {
  color: var(--gray-600);
  margin-bottom: 16px;
  max-width: 640px;
}

/* About Tab */
.about-cta {
  margin: 24px 0;
}

.share-section {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-200);
}

.share-section h3 {
  font-size: 1.2rem;
  color: var(--gray-700);
  margin-bottom: 12px;
}

.share-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  background: var(--white);
  font-family: var(--font-family);
  font-size: 1.05rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--gray-700);
}

.share-btn:hover {
  border-color: var(--gray-400);
  box-shadow: var(--shadow);
}

.share-facebook:hover {
  color: #1877f2;
  border-color: #1877f2;
}

.share-twitter:hover {
  color: #000;
  border-color: #000;
}

.share-email:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.share-btn svg {
  width: 22px;
  height: 22px;
}

/* Student Search */
.student-search {
  margin-top: 16px;
}

.search-input-wrap {
  position: relative;
  max-width: 480px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  pointer-events: none;
}

.search-input-wrap input {
  width: 100%;
  padding: 14px 16px 14px 44px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1.1rem;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color 0.2s;
}

.search-input-wrap input::placeholder {
  color: var(--gray-400);
}

.search-input-wrap input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 26, 110, 0.1);
}

.student-results {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

.search-loading {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px;
  color: var(--gray-500);
  font-size: 1rem;
}

.student-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: box-shadow 0.2s;
}

.student-card:hover {
  box-shadow: var(--shadow);
}

.student-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.student-info h4 {
  font-size: 1.1rem;
  color: var(--gray-900);
}

.student-info p {
  font-size: 0.95rem;
  color: var(--gray-500);
  margin-top: 2px;
}

/* Fundraisers */
.fundraisers-list {
  display: grid;
  gap: 16px;
}

.fundraiser-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: box-shadow 0.2s;
}

.fundraiser-card:hover {
  box-shadow: var(--shadow);
}

.fundraiser-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.fundraiser-info h4 {
  font-size: 1.15rem;
  color: var(--gray-900);
}

.fundraiser-info p {
  font-size: 1rem;
  color: var(--gray-500);
}

/* Donors */
.donors-controls {
  margin-bottom: 16px;
}

.sort-select {
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1.05rem;
  color: var(--gray-700);
  background: var(--white);
  cursor: pointer;
}

.donors-list {
  display: grid;
  gap: 12px;
}

.donor-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: box-shadow 0.2s;
}

.donor-card:hover {
  box-shadow: var(--shadow);
}

.donor-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.donor-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.donor-details h4 {
  font-size: 1.1rem;
  color: var(--gray-900);
}

.donor-details p {
  font-size: 0.95rem;
  color: var(--gray-500);
}

.donor-amount {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--success);
}

/* Comments */
.comment-form-area {
  margin-bottom: 24px;
}

.auth-prompt {
  text-align: center;
  padding: 24px;
  background: var(--gray-50);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}

.auth-prompt p {
  font-size: 1.15rem;
  color: var(--gray-600);
  margin-bottom: 16px;
}

.auth-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 360px;
  margin: 0 auto;
}

.btn-auth {
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 1.05rem;
  font-weight: 500;
  border: 1px solid var(--gray-300);
  justify-content: flex-start;
}

.btn-auth svg {
  width: 22px;
  height: 22px;
}

.btn-google {
  background: var(--white);
  color: var(--gray-700);
}

.btn-google:hover {
  background: var(--gray-50);
  border-color: var(--google-blue);
}

.btn-facebook {
  background: var(--facebook-blue);
  color: var(--white);
  border-color: var(--facebook-blue);
}

.btn-facebook:hover {
  background: #1565c0;
}

.btn-twitter {
  background: var(--twitter-black);
  color: var(--white);
  border-color: var(--twitter-black);
}

.btn-twitter:hover {
  background: #333;
}

.comment-form {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 16px;
}

.comment-user {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.user-name {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--gray-800);
}

.btn-signout {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--gray-500);
  font-size: 0.95rem;
  cursor: pointer;
  font-family: var(--font-family);
}

.btn-signout:hover {
  color: var(--danger);
}

.comment-form textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1.05rem;
  resize: vertical;
  min-height: 80px;
}

.comment-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 26, 110, 0.1);
}

.comment-form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}

.char-count {
  font-size: 0.95rem;
  color: var(--gray-400);
}

.comments-list {
  display: grid;
  gap: 16px;
}

.comment-card {
  display: flex;
  gap: 12px;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
}

.comment-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.comment-avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.comment-body {
  flex: 1;
  min-width: 0;
}

.comment-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.comment-author {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--gray-900);
}

.comment-time {
  font-size: 0.9rem;
  color: var(--gray-400);
}

.comment-text {
  font-size: 1.05rem;
  color: var(--gray-700);
  line-height: 1.5;
  word-wrap: break-word;
}

.comment-delete {
  background: none;
  border: none;
  color: var(--gray-400);
  font-size: 0.9rem;
  cursor: pointer;
  margin-top: 6px;
  font-family: var(--font-family);
}

.comment-delete:hover {
  color: var(--danger);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--gray-500);
}

.empty-state p {
  margin-bottom: 16px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 40px 20px 0;
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 40px;
  align-items: center;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--gray-700);
}

.footer-logo {
  height: 120px;
  width: auto;
}

.footer-center h3 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-400);
  margin-bottom: 12px;
}

.newsletter-form {
  display: flex;
  gap: 8px;
  max-width: 400px;
}

.newsletter-form input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--gray-600);
  border-radius: var(--radius);
  background: var(--gray-800);
  color: var(--white);
  font-family: var(--font-family);
  font-size: 1.05rem;
}

.newsletter-form input::placeholder {
  color: var(--gray-500);
}

.newsletter-form input:focus {
  outline: none;
  border-color: var(--primary-light);
}

.newsletter-note {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-top: 8px;
}

.footer-right .social-icons {
  gap: 20px;
}

.footer-right .social-icon svg {
  width: 28px;
  height: 28px;
}

.footer-right .social-icon {
  color: var(--gray-400);
}

.footer-right .social-icon:hover {
  color: var(--white);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  color: var(--gray-500);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal {
  background: var(--white);
  border-radius: 8px;
  padding: 32px;
  max-width: 480px;
  width: 90%;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--gray-400);
  cursor: pointer;
}

.modal-close:hover {
  color: var(--gray-700);
}

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

.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-300);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* Toast notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  background: var(--gray-900);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 1.05rem;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  animation: slideUp 0.3s ease;
}

.toast.error {
  background: var(--danger);
}

.toast.success {
  background: var(--success);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-right {
    order: -1;
  }

  .total-raised .amount {
    font-size: 2.4rem;
  }

  .btn-large {
    padding: 14px 28px;
    font-size: 1.1rem;
  }

  .tab-btn {
    padding: 12px 16px;
    font-size: 1rem;
  }

  .filmstrip-frame {
    width: 180px;
    height: 120px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 24px;
  }

  .footer-left {
    display: flex;
    justify-content: center;
  }

  .footer-right {
    display: flex;
    justify-content: center;
  }

  .footer-center .newsletter-form {
    margin: 0 auto;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }

  .auth-buttons {
    max-width: 100%;
  }

  .share-buttons {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .top-bar-inner {
    height: 56px;
  }

  .top-bar-logo {
    height: 56px;
  }

  .filmstrip-frame {
    width: 150px;
    height: 100px;
  }

  .carousel {
    aspect-ratio: 4 / 3;
  }

  .placeholder-content h2 {
    font-size: 1.7rem;
  }

  .placeholder-content p {
    font-size: 1.1rem;
  }

  .placeholder-content .year-range {
    font-size: 1.5rem;
  }
}
