:root {
  --bg: #0e1014;
  --surface: #171a21;
  --surface-muted: #1e222b;
  --border: #272c36;
  --border-strong: #363c49;
  --text: #e8eaed;
  --text-secondary: #9aa3b0;
  --text-muted: #6b7280;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-soft: rgba(99, 102, 241, 0.16);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35), 0 1px 3px rgba(0, 0, 0, 0.3);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: clamp(1.25rem, 4vw, 2.5rem) 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.app-container {
  max-width: 1120px;
  margin: 0 auto;
}

/* ---------- Header ---------- */
.main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-logo {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #fff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.brand-logo svg {
  width: 22px;
  height: 22px;
}

.header-title h1 {
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.header-title p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.trips-count {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.trips-count strong {
  color: var(--accent);
  font-weight: 700;
}

/* ---------- Grid ---------- */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
}

@media (min-width: 960px) {
  .content-grid {
    grid-template-columns: 400px 1fr;
  }
}

/* ---------- Cards ---------- */
.card {
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.card h2 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h2 .card-icon {
  color: var(--accent);
  display: inline-flex;
}

/* ---------- Form ---------- */
.input-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.95rem;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.95rem;
}

@media (min-width: 480px) {
  .input-row {
    grid-template-columns: 1fr 1fr;
  }
}

label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
  letter-spacing: 0.01em;
}

input {
  width: 100%;
  background-color: var(--surface-muted);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s, background-color 0.15s;
}

input::placeholder {
  color: var(--text-muted);
}

input:hover {
  border-color: var(--border-strong);
}

input:focus {
  border-color: var(--accent);
  background-color: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input::-webkit-calendar-picker-indicator {
  cursor: pointer;
  opacity: 0.55;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}

/* ---------- Paradas ---------- */
.stops-section {
  margin: 1.25rem 0;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--border-strong);
}

.stops-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.stops-header label {
  margin-bottom: 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.stops-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.stop-item {
  display: flex;
  gap: 0.55rem;
  animation: slide-in 0.2s ease;
}

.stop-item input {
  flex: 1;
}

@keyframes slide-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Botões ---------- */
.btn-primary,
.btn-secondary,
.btn-danger {
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s, transform 0.1s, box-shadow 0.15s;
}

.btn-primary:active,
.btn-secondary:active,
.btn-danger:active {
  transform: scale(0.98);
}

.btn-primary {
  width: 100%;
  background-color: var(--accent);
  color: #fff;
  padding: 0.75rem;
  font-size: 0.95rem;
  margin-top: 0.35rem;
  box-shadow: 0 1px 2px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: transparent;
  color: var(--accent);
  border: 1px solid var(--border-strong);
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.btn-secondary:hover {
  border-color: var(--accent);
  background-color: var(--accent-soft);
}

.btn-danger {
  background-color: var(--surface);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.35rem 0.45rem;
  font-size: 0.8rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-danger:hover {
  color: var(--danger);
  border-color: rgba(220, 38, 38, 0.4);
  background-color: var(--danger-soft);
}

/* ---------- Lista de Viagens ---------- */
.trips-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.trip-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.25rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.trip-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.trip-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.trip-card-top h3 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.trip-period {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.trip-period svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.trip-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.6rem;
  margin-bottom: 0.85rem;
}

.info-box {
  background-color: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
}

.info-box span {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.info-box strong {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.info-box strong.accent {
  color: var(--accent);
}

.stops-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.35rem;
}

.stop-tag {
  background-color: var(--accent-soft);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}

.empty-state {
  color: var(--text-muted);
  text-align: center;
  padding: 2.5rem 1rem;
  font-size: 0.9rem;
}

.empty-state .empty-icon {
  font-size: 1.6rem;
  display: block;
  margin-bottom: 0.5rem;
  opacity: 0.6;
}

/* ---------- Footer ---------- */
.main-footer {
  margin-top: clamp(2rem, 5vw, 3rem);
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---------- Animação de entrada ---------- */
.card,
.trip-card {
  animation: fade-up 0.3s ease both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Redução de movimento ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}