/* =========================== BASE =========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { min-height: 100%; font-family: 'DM Sans', sans-serif; background: #fff; color: #3d3558; }
h1, h2, h3 { font-family: 'Quicksand', sans-serif; }
button { cursor: pointer; font-family: inherit; }

/* =========================== HOME PAGE =========================== */
.page-wrap { min-height: 100vh; position: relative; overflow: hidden; background: #fff; }
.bg-watercolor {
  position: absolute; inset: 0;
  background-image: url('https://d2xsxph8kpxj0f.cloudfront.net/310519663392424189/H5iSaioCjgbnNDeZvbC7R5/hero-watercolor-bg-4XctfvaiA4BQoe42WqUp8Q.webp');
  background-size: cover; background-position: center; opacity: 0.55; pointer-events: none;
}
.content { position: relative; z-index: 10; display: flex; flex-direction: column; min-height: 100vh; }
.home-header { padding: 2.5rem 1rem 1rem; text-align: center; }
.home-title { font-weight: 700; font-size: clamp(1.8rem, 5vw, 3rem); color: #3d3558; letter-spacing: -0.01em; line-height: 1.2; }
.home-subtitle { font-size: clamp(0.95rem, 2vw, 1.1rem); color: #6b6585; margin-top: 0.5rem; }

/* =========================== BUBBLE GRID =========================== */
.bubble-grid {
  flex: 1; display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1.5rem; max-width: 900px; width: 100%; margin: 0 auto;
  padding: 1.5rem 1.5rem 2rem; align-content: start;
}
.bubble-btn {
  aspect-ratio: 1 / 1; border: none; display: flex; align-items: center; justify-content: center;
  padding: 0.75rem; transition: transform 0.15s ease, box-shadow 0.2s ease; outline: none;
  position: relative; overflow: hidden;
}
.bubble-btn.shape-circle { border-radius: 50%; }
.bubble-btn.shape-square { border-radius: 1rem; aspect-ratio: 1 / 1; }
.bubble-btn.shape-rectangle { border-radius: 1rem; aspect-ratio: 4 / 3; }
.bubble-btn.shape-triangle { border-radius: 0; clip-path: polygon(50% 0%, 0% 100%, 100% 100%); }
.bubble-btn:hover { transform: scale(1.07); }
.bubble-btn:active { transform: scale(0.93); }
.bubble-name {
  font-family: 'Quicksand', sans-serif; font-weight: 700; font-size: clamp(1rem, 3.5vw, 1.4rem);
  text-align: center; line-height: 1.25; word-break: break-word; hyphens: auto; padding: 0 0.25rem;
}
.bubble-btn.shape-triangle .bubble-name { margin-top: 40%; }

/* Class chooser cards */
.class-grid {
  flex: 1; display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem; max-width: 900px; width: 100%; margin: 0 auto;
  padding: 1.5rem 1.5rem 2rem; align-content: start;
}
.class-card {
  border-radius: 1.25rem; border: none; display: flex; flex-direction: column;
  align-items: center; justify-content: center; padding: 2rem 1rem;
  min-height: 140px; transition: transform 0.15s ease, box-shadow 0.2s ease;
  outline: none; cursor: pointer; box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.class-card:hover { transform: scale(1.04); }
.class-card:active { transform: scale(0.96); }
.class-card-name {
  font-family: 'Quicksand', sans-serif; font-weight: 700;
  font-size: clamp(1.2rem, 4vw, 1.8rem); text-align: center; line-height: 1.2;
}
.class-card-count { font-size: 0.85rem; margin-top: 0.4rem; opacity: 0.7; }

/* =========================== ANIMATIONS =========================== */
@keyframes floatIn { from { opacity: 0; transform: translateY(24px) scale(0.92); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes fadeZoomIn { from { opacity: 0; transform: scale(0.94); } to { opacity: 1; transform: scale(1); } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.bubble-float-in { animation: floatIn 0.5s ease-out both; }
.gallery-fade-in { animation: fadeZoomIn 0.35s ease-out both; }
.photo-slide-up { animation: slideUp 0.4s ease-out both; }

/* =========================== FOOTER (shared) =========================== */
.home-footer { text-align: center; padding: 1.5rem 1rem 2rem; display: flex; flex-direction: column; align-items: center; gap: 0.75rem; }
.footer-text { font-size: 0.78rem; color: #9b97b0; }
.teacher-zone-btn {
  font-size: 0.8rem; font-family: 'DM Sans', sans-serif; font-weight: 500;
  color: #9b97b0; background: rgba(155,151,176,0.12);
  border: 1px solid rgba(155,151,176,0.3); border-radius: 999px;
  padding: 0.35rem 0.9rem; transition: background 0.2s;
}
.teacher-zone-btn:hover { background: rgba(155,151,176,0.22); }

/* =========================== GALLERY PAGE =========================== */
.gallery-page { min-height: 100vh; display: flex; flex-direction: column; }
.gallery-header { padding: 1.5rem 1rem 1.25rem; border-bottom: 1.5px solid rgba(0,0,0,0.06); }
.back-btn {
  display: inline-flex; align-items: center; gap: 0.4rem; margin-bottom: 0.9rem;
  font-size: 0.9rem; font-weight: 500; border: none; padding: 0.4rem 0.75rem;
  border-radius: 999px; background: rgba(0,0,0,0.07); color: inherit; text-decoration: none;
}
.gallery-header-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.gallery-title { font-weight: 700; font-size: clamp(1.6rem, 5vw, 2.4rem); line-height: 1.1; }
.gallery-count { font-size: 0.9rem; opacity: 0.6; margin-top: 0.3rem; }
.teacher-btn {
  flex-shrink: 0; padding: 0.45rem 0.9rem; border-radius: 999px;
  border: 1.5px solid rgba(0,0,0,0.15); background: rgba(0,0,0,0.06);
  font-size: 0.82rem; font-weight: 500; font-family: 'DM Sans', sans-serif; transition: background 0.2s;
}
.teacher-btn.active { background: rgba(0,0,0,0.15); }

/* =========================== PHOTO GRID =========================== */
.photo-grid-wrap { flex: 1; padding: 1.5rem 1rem; }
.photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; max-width: 700px; margin: 0 auto; }
.photo-cell {
  position: relative; aspect-ratio: 1 / 1; border-radius: 1rem; overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1); cursor: pointer; border: 2px solid rgba(0,0,0,0.08);
}
.photo-cell img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.25s ease; }
.photo-cell:hover img { transform: scale(1.05); }
.delete-overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,0.45); display: flex;
  flex-direction: column; align-items: center; justify-content: center; gap: 0.4rem;
  border: none; cursor: pointer; color: white; font-size: 0.78rem; font-weight: 600; font-family: 'DM Sans', sans-serif;
}
.empty-state { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 3rem 1rem; gap: 0.75rem; text-align: center; grid-column: 1 / -1; }
.empty-state p { font-family: 'Quicksand', sans-serif; font-weight: 600; font-size: 1.1rem; opacity: 0.6; }
.empty-state small { font-size: 0.9rem; opacity: 0.45; }

/* =========================== ADD PHOTO BUTTON =========================== */
.add-photo-wrap { padding: 0.5rem 1rem 1rem; }
.add-photo-btn {
  display: flex; align-items: center; justify-content: center; gap: 0.6rem;
  width: 100%; max-width: 700px; margin: 0 auto; padding: 1.1rem;
  border-radius: 1rem; border: 2px dashed rgba(0,0,0,0.2);
  font-family: 'Quicksand', sans-serif; font-weight: 700; font-size: 1.05rem;
  cursor: pointer; transition: transform 0.15s, opacity 0.2s;
}
.add-photo-btn:hover { transform: scale(1.01); }
.add-photo-btn.disabled { opacity: 0.45; pointer-events: none; cursor: not-allowed; }
.gallery-footer { padding: 0.75rem 1rem 1.5rem; text-align: center; }

/* =========================== LIGHTBOX =========================== */
.lightbox { position: fixed; inset: 0; background: rgba(0,0,0,0.88); z-index: 100; display: flex; align-items: center; justify-content: center; }
.lightbox-close { position: absolute; top: 1rem; right: 1rem; background: rgba(255,255,255,0.15); border: none; border-radius: 50%; width: 2.5rem; height: 2.5rem; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; color: white; z-index: 101; }
.lightbox-prev, .lightbox-next { position: absolute; background: rgba(255,255,255,0.15); border: none; border-radius: 50%; width: 2.8rem; height: 2.8rem; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; color: white; z-index: 101; }
.lightbox-prev { left: 0.75rem; }
.lightbox-next { right: 0.75rem; }
.lightbox-img { max-width: 90vw; max-height: 85vh; object-fit: contain; border-radius: 0.75rem; box-shadow: 0 8px 48px rgba(0,0,0,0.6); }
.lightbox-counter { position: absolute; bottom: 1.25rem; left: 50%; transform: translateX(-50%); background: rgba(255,255,255,0.15); border-radius: 999px; padding: 0.3rem 0.9rem; font-size: 0.85rem; font-weight: 500; color: white; }

/* =========================== DIALOGS =========================== */
.dialog-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 200; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.dialog-box { background: white; border-radius: 1.25rem; padding: 2rem; width: 100%; max-width: 360px; box-shadow: 0 8px 40px rgba(0,0,0,0.2); }
.dialog-title { font-family: 'Quicksand', sans-serif; font-weight: 700; font-size: 1.3rem; color: #3d3558; margin-bottom: 0.5rem; }
.dialog-body { font-size: 0.88rem; color: #6b6585; margin-bottom: 1.25rem; }
.dialog-input { width: 100%; padding: 0.7rem 1rem; border-radius: 0.75rem; border: 1.5px solid #e2e0ec; font-family: 'DM Sans', sans-serif; font-size: 1rem; outline: none; margin-bottom: 0.5rem; background: #fafafa; }
.dialog-input:focus { border-color: #a89fc8; }
.dialog-error { font-size: 0.82rem; color: #ef4444; margin-bottom: 0.75rem; }
.dialog-buttons { display: flex; gap: 0.75rem; margin-top: 0.75rem; }
.btn-cancel { flex: 1; padding: 0.7rem; border-radius: 0.75rem; border: 1.5px solid #e2e0ec; background: white; font-family: 'DM Sans', sans-serif; font-weight: 500; font-size: 0.9rem; color: #6b6585; }
.btn-confirm { flex: 1; padding: 0.7rem; border-radius: 0.75rem; border: none; background: #a89fc8; font-family: 'Quicksand', sans-serif; font-weight: 700; font-size: 0.9rem; color: #3d3558; transition: background 0.2s; }
.btn-confirm:hover { background: #9589bc; }
.btn-confirm:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-danger { flex: 1; padding: 0.7rem; border-radius: 0.75rem; border: none; background: #ef4444; font-family: 'Quicksand', sans-serif; font-weight: 700; font-size: 0.9rem; color: white; }
.full-width { width: 100%; margin-top: 0.5rem; }

/* =========================== TEACHER / ADMIN PAGE =========================== */
.admin-login { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1.5rem; background: linear-gradient(160deg, #f5f3ff 0%, #ede9fe 100%); }
.admin-login-box { background: white; border-radius: 1.5rem; padding: 2.5rem; width: 100%; max-width: 380px; box-shadow: 0 8px 40px rgba(100,80,180,0.12); display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
.admin-lock { font-size: 3rem; margin-bottom: 0.5rem; }
.admin-login-title { font-weight: 700; font-size: 1.6rem; color: #3d3558; }
.admin-login-sub { font-size: 0.9rem; color: #6b6585; margin-bottom: 0.75rem; }
.admin-login-box .dialog-input { margin-top: 0.5rem; }
.back-link { font-size: 0.85rem; color: #9b97b0; text-decoration: none; margin-top: 0.75rem; }
.back-link:hover { text-decoration: underline; }
.admin-panel { max-width: 720px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.admin-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 2rem; flex-wrap: wrap; }
.admin-title { font-weight: 700; font-size: 1.8rem; color: #3d3558; }
.admin-sub { font-size: 0.9rem; color: #6b6585; margin-top: 0.2rem; }
.admin-section { background: white; border: 1.5px solid #ede9fe; border-radius: 1.25rem; padding: 1.5rem; margin-bottom: 1.5rem; box-shadow: 0 2px 12px rgba(100,80,180,0.06); }
.admin-section-title { font-weight: 700; font-size: 1.1rem; color: #3d3558; margin-bottom: 1.25rem; }
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.setting-label { font-weight: 500; font-size: 0.95rem; color: #3d3558; }
.btn-group { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.shape-group { gap: 0.4rem; }
.btn-toggle { padding: 0.45rem 0.9rem; border-radius: 999px; border: 1.5px solid #e2e0ec; background: white; font-family: 'DM Sans', sans-serif; font-size: 0.85rem; font-weight: 500; color: #6b6585; transition: all 0.15s; }
.btn-toggle.active { background: #a89fc8; border-color: #a89fc8; color: #3d3558; font-weight: 700; }
.save-feedback { font-size: 0.85rem; color: #22c55e; margin-top: 0.5rem; font-weight: 600; }
.student-list { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1rem; }
.student-row { display: flex; align-items: center; gap: 0.75rem; padding: 0.6rem 0.75rem; border-radius: 0.75rem; background: #fafafa; border: 1px solid #e2e0ec; }
.student-row-name { flex: 1; font-size: 0.95rem; font-weight: 500; color: #3d3558; }
.student-row input { flex: 1; border: none; background: transparent; font-family: 'DM Sans', sans-serif; font-size: 0.95rem; font-weight: 500; color: #3d3558; outline: none; }
.btn-small { padding: 0.3rem 0.6rem; border-radius: 0.5rem; border: 1px solid #e2e0ec; background: white; font-size: 0.78rem; font-weight: 500; font-family: 'DM Sans', sans-serif; color: #6b6585; transition: background 0.15s; }
.btn-small:hover { background: #f0eeff; }
.btn-small.danger { color: #ef4444; border-color: #fca5a5; }
.btn-small.danger:hover { background: #fef2f2; }
.add-student-row { display: flex; gap: 0.75rem; align-items: center; margin-top: 0.5rem; }
.add-student-row .dialog-input { margin-bottom: 0; flex: 1; }
.add-student-row .btn-confirm { flex: none; padding: 0.7rem 1.2rem; }
.admin-hint { font-size: 0.88rem; color: #6b6585; margin-bottom: 0.75rem; }
.admin-photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; margin-top: 1rem; }
.admin-photo-cell { position: relative; aspect-ratio: 1 / 1; border-radius: 0.75rem; overflow: hidden; border: 1.5px solid #e2e0ec; }
.admin-photo-cell img { width: 100%; height: 100%; object-fit: cover; display: block; }
.admin-photo-del { position: absolute; top: 0.3rem; right: 0.3rem; background: rgba(239,68,68,0.85); border: none; border-radius: 50%; width: 1.8rem; height: 1.8rem; display: flex; align-items: center; justify-content: center; color: white; font-size: 0.9rem; cursor: pointer; }

/* Colour picker row */
.color-swatch { width: 2rem; height: 2rem; border-radius: 0.4rem; border: 2px solid rgba(0,0,0,0.15); cursor: pointer; appearance: none; padding: 0; }

/* Admin dashboard class list */
.class-list { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 1rem; }
.class-row { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 1rem; border-radius: 0.75rem; background: #fafafa; border: 1px solid #e2e0ec; }
.class-row-color { width: 1.2rem; height: 1.2rem; border-radius: 0.3rem; flex-shrink: 0; }
.class-row-name { flex: 1; font-size: 0.95rem; font-weight: 600; color: #3d3558; }
.class-row-count { font-size: 0.82rem; color: #9b97b0; }
.add-class-row { display: flex; gap: 0.75rem; align-items: center; margin-top: 0.5rem; flex-wrap: wrap; }
.add-class-row .dialog-input { margin-bottom: 0; flex: 1; min-width: 160px; }

/* =========================== LOADING SPINNER =========================== */
.spinner { display: inline-block; width: 1.5rem; height: 1.5rem; border: 3px solid rgba(0,0,0,0.1); border-top-color: #a89fc8; border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-wrap { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 3rem; gap: 0.75rem; grid-column: 1 / -1; opacity: 0.6; }

/* =========================== RESPONSIVE =========================== */
@media (max-width: 480px) {
  .bubble-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 1rem; padding: 1rem; }
  .class-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1rem; padding: 1rem; }
  .admin-header { flex-direction: column; }
  .setting-row { flex-direction: column; align-items: flex-start; }
}