:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --primary: #15803d;
  --primary-dark: #0f172a;
  --paid-bg: #22c55e;
  --paid-bg-dark: #16a34a;
  --paid-text: #052e16;
  --radius: 14px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  padding-bottom: calc(24px + var(--safe-bottom));
}

.app-header {
  background: var(--primary-dark);
  color: #fff;
  padding: calc(16px + var(--safe-top)) 20px 16px;
  text-align: center;
}

.app-header h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.date-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 12px 4px;
  max-width: 480px;
  margin: 0 auto;
}

.nav-btn {
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: var(--surface);
  color: var(--primary-dark);
  font-size: 1.6rem;
  line-height: 1;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

.nav-btn:active {
  background: var(--border);
}

.date-display {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

#datePicker {
  border: none;
  background: transparent;
  font-size: 1rem;
  color: var(--text-muted);
  text-align: center;
  padding: 6px;
}

.date-label {
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
  color: var(--text);
}

.today-row {
  display: flex;
  justify-content: center;
  padding: 6px 0 10px;
}

.today-btn {
  border: none;
  background: var(--surface);
  color: var(--primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 20px;
  border-radius: 999px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.today-btn:active {
  background: var(--border);
}

.appointment-list {
  max-width: 480px;
  margin: 0 auto;
  padding: 4px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.appointment-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  min-height: 64px;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  cursor: pointer;
}

.appointment-row.paid {
  background: var(--paid-bg);
  border-color: var(--paid-bg-dark);
}

.appointment-row .time {
  flex: 0 0 auto;
  width: 64px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.appointment-row.paid .time {
  color: var(--paid-text);
}

.appointment-row .patient-input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  font-size: 1.05rem;
  color: var(--text);
  padding: 10px 4px;
  font-family: inherit;
}

.appointment-row.paid .patient-input {
  color: var(--paid-text);
}

.appointment-row .patient-input::placeholder {
  color: var(--text-muted);
  font-style: italic;
}

.appointment-row.paid .patient-input::placeholder {
  color: rgba(5, 46, 22, 0.55);
}

.appointment-row .patient-input:focus {
  outline: none;
  border-bottom: 2px solid var(--primary);
}

.paid-indicator {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  color: transparent;
  font-size: 1rem;
  font-weight: 900;
}

.appointment-row.paid .paid-indicator {
  border-color: var(--paid-text);
  background: var(--paid-text);
  color: var(--paid-bg);
}

.closed-message {
  max-width: 480px;
  margin: 40px auto;
  text-align: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  font-weight: 600;
}

.legend {
  max-width: 480px;
  margin: 20px auto 0;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.legend-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--border);
  margin-left: 12px;
}

.legend-dot.legend-paid {
  background: var(--paid-bg);
  border-color: var(--paid-bg-dark);
}

@media (min-width: 480px) {
  .app-header h1 { font-size: 1.5rem; }
}