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

:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #1f2a42;
  --bg-input: #0f1629;
  --border: #2a3555;
  --border-focus: #6366f1;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --success: #22c55e;
  --success-glow: rgba(34, 197, 94, 0.2);
  --warning: #f59e0b;
  --danger: #ef4444;
  --morning: #f59e0b;
  --morning-bg: rgba(245, 158, 11, 0.1);
  --afternoon: #3b82f6;
  --afternoon-bg: rgba(59, 130, 246, 0.1);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(59, 130, 246, 0.08), transparent);
}

/* ========== Layout ========== */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.header {
  padding: 32px 0 24px;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-icon {
  font-size: 2.2rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff, #c7d2fe);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 2px;
}

.main-content {
  display: grid;
  grid-template-columns: 340px 1fr 320px;
  gap: 24px;
  align-items: start;
}

/* ========== Panel ========== */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
  animation: panelIn 0.5s ease both;
}

.panel:nth-child(2) { animation-delay: 0.1s; }
.panel:nth-child(3) { animation-delay: 0.2s; }

@keyframes panelIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.panel-header h2 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ========== Calendar ========== */
.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}

.nav-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.nav-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.month-title {
  font-size: 1.05rem;
  font-weight: 600;
}

.calendar-grid {
  padding: 0 20px 16px;
}

.weekday-headers {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  margin-bottom: 8px;
}

.weekday-headers span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 8px 0;
}

.days-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.day-cell {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  border: 1px solid transparent;
}

.day-cell:not(.disabled):not(.empty):hover {
  background: var(--bg-card-hover);
  border-color: var(--border);
  transform: scale(1.08);
}

.day-cell.today {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.1);
}

.day-cell.selected {
  background: linear-gradient(135deg, var(--accent), #8b5cf6) !important;
  border-color: transparent !important;
  color: #fff !important;
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: scale(1.08);
}

.day-cell.disabled {
  color: var(--text-muted);
  opacity: 0.35;
  cursor: not-allowed;
}

.day-cell.empty {
  cursor: default;
}

.day-dot-container {
  display: flex;
  gap: 3px;
  margin-top: 2px;
  height: 5px;
}

.day-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
}

.day-dot.morning { background: var(--morning); }
.day-dot.afternoon { background: var(--afternoon); }
.day-dot.booked { opacity: 0.3; }

.calendar-legend {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 12px 20px 20px;
  border-top: 1px solid var(--border);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-dot.available { background: var(--success); }
.legend-dot.partial { background: var(--warning); }
.legend-dot.full { background: var(--danger); }

/* ========== Booking Form ========== */
.booking-panel {
  min-height: 500px;
}

.selected-date-display {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.placeholder-text {
  color: var(--text-muted);
  font-size: 1rem;
  animation: pulse 2s ease-in-out infinite;
}

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

.booking-form {
  padding: 24px;
  animation: formIn 0.4s ease;
}

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

.date-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.time-slots h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.slot-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.slot-card {
  position: relative;
  cursor: pointer;
}

.slot-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.slot-content {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-secondary);
  transition: var(--transition);
}

.slot-card:hover .slot-content {
  border-color: var(--accent-light);
  background: var(--bg-card-hover);
}

.slot-card input:checked + .slot-content {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.08);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.slot-card.disabled-slot {
  pointer-events: none;
  opacity: 0.45;
}

.slot-card.disabled-slot .slot-content {
  background: rgba(239, 68, 68, 0.05);
  border-color: rgba(239, 68, 68, 0.2);
}

.slot-icon {
  font-size: 1.6rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
}

#slot-morning .slot-icon {
  background: var(--morning-bg);
}

#slot-afternoon .slot-icon {
  background: var(--afternoon-bg);
}

.slot-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.slot-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.slot-time {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.slot-status {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
}

.slot-status.available {
  color: var(--success);
  background: var(--success-glow);
}

.slot-status.full {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.15);
}

/* ========== Form Inputs ========== */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* ========== Submit Button ========== */
.submit-btn {
  width: 100%;
  padding: 14px 24px;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  color: #fff;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
  margin-top: 8px;
  position: relative;
  overflow: hidden;
}

.submit-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transition: 0.5s;
}

.submit-btn:not(:disabled):hover::before {
  left: 100%;
}

.submit-btn:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.submit-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

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

.btn-icon {
  transition: var(--transition);
}

.submit-btn:not(:disabled):hover .btn-icon {
  transform: translateX(4px);
}

/* ========== Records Panel ========== */
.records-panel {
  max-height: 700px;
  display: flex;
  flex-direction: column;
}

.records-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  max-height: 540px;
}

.records-list::-webkit-scrollbar {
  width: 4px;
}

.records-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.empty-state span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.record-card {
  padding: 14px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  animation: recordIn 0.35s ease;
  transition: var(--transition);
  position: relative;
}

.record-card:hover {
  border-color: var(--accent-light);
  transform: translateX(4px);
}

@keyframes recordIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.record-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.record-date {
  font-weight: 600;
  font-size: 0.9rem;
}

.record-slot-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.record-slot-badge.morning {
  background: var(--morning-bg);
  color: var(--morning);
}

.record-slot-badge.afternoon {
  background: var(--afternoon-bg);
  color: var(--afternoon);
}

.record-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.record-delete {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 6px;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.record-card:hover .record-delete {
  opacity: 1;
}

.record-delete:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

.records-stats {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  background: rgba(255, 255, 255, 0.02);
}

.clear-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
  border-radius: 6px;
  transition: var(--transition);
}

.clear-btn:hover {
  background: rgba(239, 68, 68, 0.15);
  transform: scale(1.1);
}

/* ========== Toast ========== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 0.35s ease;
  min-width: 280px;
  backdrop-filter: blur(12px);
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateX(40px);
  }
}

/* ========== Modal ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 48px;
  text-align: center;
  max-width: 400px;
  transform: scale(0.9);
  transition: 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.modal h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.modal p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 24px;
}

.modal-btn {
  padding: 10px 32px;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  color: #fff;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.modal-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

/* ========== Responsive ========== */
@media (max-width: 1100px) {
  .main-content {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
}

@media (max-width: 600px) {
  .app-container {
    padding: 0 12px 24px;
  }

  .header {
    padding: 20px 0 16px;
  }

  .logo-icon {
    width: 44px;
    height: 44px;
    font-size: 1.6rem;
  }

  .logo h1 {
    font-size: 1.2rem;
  }

  .panel-header {
    padding: 16px 18px;
  }

  .booking-form {
    padding: 18px;
  }

  .calendar-grid {
    padding: 0 12px 12px;
  }
}