/* ===== Animal Birthdays App - Styles ===== */

:root {
  --primary: #14b8a6;
  --primary-dark: #0d9488;
  --secondary: #7ec8e3;
  --secondary-dark: #5aafcc;
  --accent: #ffd166;
  --accent-dark: #f0bc40;
  --bg: #f0fdfa;
  --card-bg: #ffffff;
  --text: #1a3a38;
  --text-muted: #5f8a84;
  --border: #ccfbf1;
  --success: #6bcb77;
  --danger: #ff6b6b;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.14);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.25s ease;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ===== Header ===== */
.app-header {
  background: linear-gradient(135deg, #14b8a6 0%, #2dd4bf 50%, #99f6e4 100%);
  padding: 2.5rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.app-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
  pointer-events: none;
}

.app-header h1 {
  font-size: clamp(1.8rem, 5vw, 3rem);
  color: white;
  font-weight: 800;
  text-shadow: 0 2px 10px rgba(0,0,0,0.15);
  position: relative;
  letter-spacing: -0.5px;
}

.app-header h1 .emoji {
  display: inline-block;
  animation: bounce 1.5s ease infinite alternate;
}

.app-header p {
  color: rgba(255,255,255,0.9);
  font-size: 1.1rem;
  margin-top: 0.5rem;
  position: relative;
}

@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-6px); }
}

/* ===== Main Layout ===== */
.app-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

/* ===== Cards ===== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

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

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.card-header .header-icon {
  font-size: 1.5rem;
}

.card-body {
  padding: 1.5rem;
}

/* ===== Form ===== */
.form-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: inherit;
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238a6f6f' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.15);
  background: white;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(20, 184, 166, 0.4);
}

.btn-primary:hover {
  filter: brightness(1.05);
  box-shadow: 0 6px 20px rgba(20, 184, 166, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(126, 200, 227, 0.4);
}

.btn-secondary:hover {
  filter: brightness(1.05);
  box-shadow: 0 6px 20px rgba(126, 200, 227, 0.5);
  transform: translateY(-1px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--text);
  box-shadow: 0 4px 15px rgba(255, 209, 102, 0.4);
}

.btn-accent:hover {
  filter: brightness(1.05);
  box-shadow: 0 6px 20px rgba(255, 209, 102, 0.5);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--danger);
  border: 2px solid var(--danger);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
}

.btn-ghost:hover {
  background: var(--danger);
  color: white;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.82rem;
}

.btn-google {
  background: #4285F4;
  color: white;
  box-shadow: 0 4px 12px rgba(66, 133, 244, 0.35);
}

.btn-google:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 18px rgba(66, 133, 244, 0.45);
  transform: translateY(-1px);
}

.btn-apple {
  background: #1d1d1f;
  color: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn-apple:hover {
  background: #333;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
  transform: translateY(-1px);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 4rem;
  display: block;
  margin-bottom: 1rem;
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.empty-state p {
  font-size: 1.05rem;
}

/* ===== Pet Cards ===== */
.pets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.pet-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  border: 2px solid transparent;
}

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

.pet-card.birthday-today {
  border-color: var(--accent);
  animation: glow 2s ease infinite alternate;
}

@keyframes glow {
  from { box-shadow: var(--shadow); }
  to { box-shadow: 0 0 25px rgba(255, 209, 102, 0.6); }
}

.pet-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 2px solid var(--border);
}

.pet-avatar {
  font-size: 2.8rem;
  line-height: 1;
  background: var(--bg);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 2px solid var(--border);
}

.pet-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.pet-species {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

.pet-delete {
  margin-left: auto;
}

.pet-card-body {
  padding: 1rem 1.25rem;
}

.pet-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.stat-item {
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
}

.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.15rem;
}

.stat-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.stat-value.highlight {
  color: var(--primary-dark);
}

.countdown-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, #ffd166, #ffb347);
  color: #7a4f00;
  border-radius: 20px;
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1rem;
  width: 100%;
  justify-content: center;
}

.countdown-badge.today {
  background: linear-gradient(135deg, var(--success), #45b355);
  color: white;
  animation: pulse 1.5s ease infinite;
}

.pet-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

/* ===== Calendar ===== */
.calendar-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
}

.calendar-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.calendar-nav {
  display: flex;
  gap: 0.5rem;
}

.calendar-nav .btn {
  width: 38px;
  height: 38px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  border-radius: 50%;
  background: var(--bg);
  color: var(--text);
  border: 2px solid var(--border);
}

.calendar-nav .btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: none;
}

.calendar-grid {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--border);
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.calendar-weekday {
  padding: 0.7rem 0.5rem;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.calendar-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0;
  background: var(--border);
}

.calendar-day {
  background: white;
  min-height: 80px;
  padding: 0.5rem;
  cursor: default;
  transition: background var(--transition);
  position: relative;
  border: 1px solid transparent;
}

.calendar-day.other-month {
  background: var(--bg);
  opacity: 0.5;
}

.calendar-day.today {
  background: #f0fdfa;
}

.calendar-day.today .day-number {
  background: var(--secondary);
  color: white;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.calendar-day.has-birthday {
  background: #f0fdfa;
  cursor: pointer;
}

.calendar-day.has-birthday:hover {
  background: #ccfbf1;
}

.day-number {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.day-events {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.day-event {
  font-size: 0.7rem;
  padding: 2px 5px;
  border-radius: 4px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.day-event.actual-birthday {
  background: linear-gradient(135deg, #14b8a6, #f97316);
  color: white;
}

.day-event.human-birthday {
  background: linear-gradient(135deg, #7ec8e3, #9b9ef5);
  color: white;
}

.calendar-legend {
  display: flex;
  gap: 1.25rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}

.legend-dot.actual {
  background: linear-gradient(135deg, #14b8a6, #f97316);
}

.legend-dot.human {
  background: linear-gradient(135deg, #7ec8e3, #9b9ef5);
}

/* ===== Human Years Info ===== */
.human-years-info {
  background: linear-gradient(135deg, #f0f8ff, #e8f4fd);
  border: 2px solid var(--secondary);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text);
}

.human-years-info strong {
  color: var(--secondary-dark);
}

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  background: var(--text);
  color: white;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-hover);
  animation: slideInRight 0.3s ease, fadeOut 0.5s ease 2.5s forwards;
  max-width: 320px;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

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

@keyframes slideInRight {
  from { transform: translateX(120%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; pointer-events: none; }
}

/* ===== Section Divider ===== */
.section-divider {
  text-align: center;
  position: relative;
  margin: 0.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.section-divider::before,
.section-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 38%;
  height: 1px;
  background: var(--border);
}
.section-divider::before { left: 0; }
.section-divider::after { right: 0; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .calendar-day {
    min-height: 55px;
    padding: 0.3rem;
  }

  .calendar-weekday {
    font-size: 0.68rem;
    padding: 0.5rem 0.2rem;
  }

  .day-number {
    font-size: 0.78rem;
    width: 22px;
    height: 22px;
  }

  .day-event {
    font-size: 0.6rem;
    padding: 1px 3px;
  }

  .pets-grid {
    grid-template-columns: 1fr;
  }

  .pet-actions {
    flex-direction: column;
  }

  .btn-google,
  .btn-apple {
    width: 100%;
    justify-content: center;
  }

  .toast-container {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
  }
}

/* ===== Paw print decoration ===== */
.paw-bg {
  position: fixed;
  pointer-events: none;
  opacity: 0.04;
  font-size: 8rem;
  z-index: 0;
  user-select: none;
}

.paw-bg:nth-child(1) { top: 5%; left: 5%; transform: rotate(-20deg); }
.paw-bg:nth-child(2) { top: 20%; right: 3%; transform: rotate(15deg); }
.paw-bg:nth-child(3) { bottom: 10%; left: 8%; transform: rotate(10deg); }
.paw-bg:nth-child(4) { bottom: 25%; right: 6%; transform: rotate(-30deg); }

/* ===== Birthday Timeline ===== */
.timeline-pets {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.timeline-pet {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.timeline-pet-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  font-size: 1rem;
}

.timeline-pet-header .timeline-emoji {
  font-size: 1.4rem;
}

.timeline-pet-header .timeline-species {
  font-size: 0.8rem;
  opacity: 0.85;
  margin-left: 0.2rem;
}

.timeline-events {
  display: flex;
  flex-direction: column;
}

.timeline-event {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
  transition: background var(--transition);
}

.timeline-event:last-child {
  border-bottom: none;
}

.timeline-event.past {
  opacity: 0.65;
  background: var(--bg);
}

.timeline-event.past:hover {
  opacity: 1;
  background: #f0fdfa;
}

.timeline-event.today {
  background: linear-gradient(90deg, #f0fdfa, #ccfbf1);
  font-weight: 700;
  border-left: 4px solid var(--primary);
}

.timeline-event.upcoming {
  background: white;
}

.timeline-event.upcoming:hover {
  background: #f0fdfa;
}

.timeline-event-icon {
  font-size: 1rem;
  flex-shrink: 0;
  width: 22px;
  text-align: center;
}

.timeline-date {
  font-weight: 600;
  color: var(--text);
  min-width: 120px;
  flex-shrink: 0;
}

.timeline-age {
  color: var(--primary-dark);
  font-weight: 700;
  flex-shrink: 0;
  min-width: 60px;
}

.timeline-human {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.timeline-badge {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  flex-shrink: 0;
}

.timeline-badge.next {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #7a4f00;
}

.timeline-badge.today-badge {
  background: linear-gradient(135deg, var(--success), #45b355);
  color: white;
}

@media (max-width: 640px) {
  .timeline-date {
    min-width: 90px;
    font-size: 0.8rem;
  }
  .timeline-age {
    min-width: 44px;
    font-size: 0.8rem;
  }
  .timeline-human {
    display: none;
  }
}

.timeline-gap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.2rem 1rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.timeline-gap-dots {
  color: var(--text-muted, #8b9dc3);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  opacity: 0.7;
}