:root {
  --primary: #ff9fb4; /* Warm pastel pink */
  --primary-dark: #f08ca1;
  --secondary: #b5e8e0; /* Mint green */
  --accent: #d4c4fb; /* Lavender */
  --bg-color: #fff5f7;
  --surface: #ffffff;
  --text-dark: #4a4a4a;
  --text-light: #8a8a8a;
  --danger: #ff8b8b;
  --border: #f0e6e8;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow: 0 8px 24px rgba(255, 159, 180, 0.15);
  --shadow-sm: 0 4px 12px rgba(255, 159, 180, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Nunito', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-dark);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Auth View */
.auth-view {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  text-align: center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: var(--bg-color);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.auth-view.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-20px);
}

.auth-mascot {
  width: 150px;
  margin-bottom: 1.5rem;
  animation: bounce 2s infinite ease-in-out;
}

.auth-card {
  background: var(--surface);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 400px;
}

.auth-card h1 {
  font-size: 1.8rem;
  color: var(--primary-dark);
  margin-bottom: 0.5rem;
}

.auth-card p {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.auth-input-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Prevent display:flex from overriding the HTML hidden attribute */
.auth-input-group[hidden] {
  display: none;
}

.auth-input {
  width: 100%;
  padding: 1rem 1.25rem;
  border: 2px solid var(--primary);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  font-family: inherit;
  outline: none;
  transition: box-shadow 0.2s;
}

.auth-input:focus {
  box-shadow: 0 0 0 4px rgba(255, 159, 180, 0.2);
}

.auth-btn {
  width: 100%;
  padding: 1rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s, background-color 0.2s;
  box-shadow: var(--shadow-sm);
}

.auth-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.auth-btn:active {
  transform: translateY(0);
}

/* Loading state shown before auth resolves */
.auth-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem;
  color: var(--text-light);
  font-weight: 600;
  font-size: 0.95rem;
}

.auth-loading[hidden] {
  display: none;
}

.auth-spinner {
  width: 22px;
  height: 22px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}


/* App View */
.app-view {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
}

.app-view.visible {
  opacity: 1;
  pointer-events: auto;
  position: relative;
}

/* Bubbles Background */
.bubbles-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.bubble {
  position: absolute;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.8), rgba(181,232,224,0.4));
  border-radius: 50%;
  box-shadow: inset 0 0 20px rgba(255,255,255,0.5);
  animation: rise 15s infinite ease-in-out, wobble 4s infinite ease-in-out;
  opacity: 0.6;
}

.bubble:nth-child(1) { width: 40px; height: 40px; left: 10%; bottom: -40px; animation-duration: 12s; }
.bubble:nth-child(2) { width: 60px; height: 60px; left: 30%; bottom: -60px; animation-duration: 18s; animation-delay: 2s; }
.bubble:nth-child(3) { width: 30px; height: 30px; left: 50%; bottom: -30px; animation-duration: 10s; animation-delay: 4s; }
.bubble:nth-child(4) { width: 80px; height: 80px; left: 70%; bottom: -80px; animation-duration: 22s; animation-delay: 1s; }
.bubble:nth-child(5) { width: 50px; height: 50px; left: 85%; bottom: -50px; animation-duration: 15s; animation-delay: 3s; }
.bubble:nth-child(6) { width: 35px; height: 35px; left: 20%; bottom: -35px; animation-duration: 14s; animation-delay: 5s; }
.bubble:nth-child(7) { width: 45px; height: 45px; left: 60%; bottom: -45px; animation-duration: 16s; animation-delay: 0.5s; }
.bubble:nth-child(8) { width: 70px; height: 70px; left: 95%; bottom: -70px; animation-duration: 20s; animation-delay: 6s; }

@keyframes rise {
  0% { bottom: -100px; transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { bottom: 100vh; transform: scale(1); }
}

@keyframes wobble {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(20px); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.auth-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

/* Header */
.header {
  background: var(--surface);
  padding: 1.5rem 1rem 1rem;
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 600px;
  margin: 0 auto 1rem;
  justify-content: space-between;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mascot {
  width: 60px;
  height: 60px;
  object-fit: contain;
  animation: bounce 3s infinite ease-in-out;
}

.header-text h1 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin: 0;
}

.tagline {
  font-size: 0.85rem;
  color: var(--text-light);
  margin: 0;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-color);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-lg);
  font-weight: 700;
  color: var(--primary-dark);
}

.logout-btn {
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 0.8rem;
  cursor: pointer;
  text-decoration: underline;
  font-family: inherit;
}

.week-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-color);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  max-width: 600px;
  margin: 0 auto;
}

.week-btn {
  background: var(--surface);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.2rem;
  color: var(--primary-dark);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.1s, background-color 0.2s;
}

.week-btn:hover { background: var(--primary); color: white; transform: scale(1.05); }
.week-btn:active { transform: scale(0.95); }
.week-label { font-weight: 700; color: var(--text-dark); font-size: 1.1rem; }

/* Main Content */
.main-content {
  flex: 1;
  padding: 1.5rem 1rem;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.day-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s;
}

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

.day-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px dashed var(--border);
}

.day-name { font-size: 1.2rem; font-weight: 800; color: var(--text-dark); }
.day-date { font-size: 0.9rem; color: var(--text-light); font-weight: 600; }

.slots-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.slot {
  display: flex;
  align-items: center;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-color);
  position: relative;
  transition: background-color 0.2s;
}

.slot-icon {
  font-size: 1.5rem;
  margin-right: 1rem;
  background: var(--surface);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

.slot-details { flex: 1; display: flex; flex-direction: column; }
.slot-name { font-weight: 700; color: var(--text-dark); font-size: 1rem; margin-bottom: 0.2rem; }
.slot-time { font-size: 0.8rem; color: var(--text-light); }
.slot-note { font-size: 0.85rem; color: var(--primary-dark); font-style: italic; margin-top: 0.2rem; }

.slot-action {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  font-family: inherit;
}

.slot.available { border: 2px solid transparent; }
.slot.available .slot-name { color: var(--text-light); }
.slot.available .slot-action { background: var(--primary); color: white; box-shadow: var(--shadow-sm); }
.slot.available .slot-action:hover { background: var(--primary-dark); transform: translateY(-1px); }
.slot.available .slot-action:active { transform: translateY(1px); }

.slot.unavailable {
  opacity: 0.72;
  background: #f3f1f2;
}

.slot.unavailable .slot-icon {
  background: #ebe6e8;
  box-shadow: none;
}

.slot.unavailable .slot-name,
.slot.unavailable .slot-time,
.slot.unavailable .slot-note {
  color: #8d7f85;
}

.slot.unavailable .slot-action {
  background: #ddd5d8;
  color: #7c6e74;
  box-shadow: none;
  cursor: not-allowed;
  pointer-events: none;
}

.slot.booked { background: var(--accent); border: 2px solid transparent; }
.slot.booked .slot-icon { background: rgba(255,255,255,0.5); }
.slot.booked .slot-name { color: #5a4b86; }
.slot.booked .slot-time { color: #7a6b9e; }
.slot.booked.booked-by-me { background: var(--secondary); }
.slot.booked.booked-by-me .slot-name { color: #3b6b62; }
.slot.booked.booked-by-me .slot-time { color: #5b8a81; }

.btn-cancel-slot {
  background: rgba(255,255,255,0.6);
  color: #3b6b62;
}
.btn-cancel-slot:hover { background: white; color: var(--danger); }

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.modal-overlay[hidden] {
  opacity: 0;
  pointer-events: none;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 100%;
  max-width: 400px;
  position: relative;
  box-shadow: var(--shadow);
  transform: translateY(0) scale(1);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay[hidden] .modal { transform: translateY(20px) scale(0.95); }

.modal-sm { max-width: 320px; text-align: center; }

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--bg-color);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 1rem;
  color: var(--text-light);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
}
.modal-close:hover { background: var(--border); color: var(--text-dark); }

.modal-mascot { font-size: 3rem; text-align: center; margin-bottom: 0.5rem; line-height: 1; }

.modal h2 { text-align: center; color: var(--primary-dark); font-size: 1.5rem; margin-bottom: 0.25rem; }
.modal-subtitle { text-align: center; color: var(--text-light); font-size: 0.9rem; margin-bottom: 1.5rem; }

.modal-note-section { margin-bottom: 1.5rem; display: flex; flex-direction: column; gap: 0.5rem; }
.modal-note-section label { font-size: 0.9rem; font-weight: 700; color: var(--text-dark); }
.modal-note-section input {
  width: 100%;
  padding: 0.8rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}
.modal-note-section input:focus { border-color: var(--primary); }

.modal-actions { display: flex; flex-direction: column; gap: 0.75rem; }

.btn {
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  font-family: inherit;
  width: 100%;
}

.btn-confirm { background: var(--primary); color: white; box-shadow: var(--shadow-sm); }
.btn-confirm:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-confirm:active { transform: translateY(0); }

.btn-cancel { background: var(--bg-color); color: var(--text-dark); }
.btn-cancel:hover { background: var(--border); }

.btn-danger { background: var(--danger); color: white; box-shadow: var(--shadow-sm); }
.btn-danger:hover { background: #ff7070; transform: translateY(-2px); }
.btn-danger:active { transform: translateY(0); }

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--surface);
  color: var(--primary-dark);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  font-weight: 700;
  z-index: 1000;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: 2px solid var(--primary);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

@media (max-width: 480px) {
  .header { padding: 1rem; }
  .header-text h1 { font-size: 1.2rem; }
  .day-card { padding: 1rem; }
  .slot { padding: 0.6rem; }
}