:root {
  color-scheme: light;
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: #f5f7fa;
  color: #111827;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: #f5f7fa;
  color: #1f2937;
  display: flex;
  flex-direction: column;
}

.app-header {
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  padding: 2rem 2.5rem;
}

.header-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.header-text {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: 640px;
}

.header-kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 600;
  font-size: 0.78rem;
  color: #94a3b8;
}

.header-text h1 {
  margin: 0;
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #0f172a;
}

.header-subtitle {
  margin: 0.35rem 0 0;
  color: #475569;
  font-size: 1rem;
  max-width: 560px;
  line-height: 1.5;
}

.app-disclaimer {
  margin: 0.75rem 0 0;
  padding: 0.85rem 1rem;
  border-radius: 0.9rem;
  border: 1px solid #fed7aa;
  background: #fff7ed;
  color: #9a3412;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.45;
}

@media (min-width: 900px) {
  .header-content {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
  }
}

.content {
  flex: 1;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 2rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.panel {
  background: #ffffff;
  border-radius: 1.25rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.04);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.section-header h2 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.range-toggle {
  display: inline-flex;
  padding: 0.25rem;
  border-radius: 999px;
  background: #f3f4f6;
  border: 1px solid #e5e7eb;
  gap: 0.25rem;
}

.toggle-button {
  border: none;
  background: transparent;
  color: #4b5563;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, box-shadow 120ms ease;
}

.toggle-button--active {
  background: #ffffff;
  color: #1f2937;
  box-shadow: 0 6px 16px rgba(148, 163, 184, 0.25);
}

.refresh-button {
  cursor: pointer;
  background: #111827;
  color: #ffffff;
  border: none;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(17, 24, 39, 0.18);
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.refresh-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 35px rgba(17, 24, 39, 0.2);
}

.refresh-button:disabled {
  opacity: 0.6;
  cursor: wait;
  transform: none;
  box-shadow: none;
}

.status {
  padding: 0.85rem 1rem;
  border-radius: 0.9rem;
  background: #f1f5f9;
  color: #475569;
  font-size: 0.95rem;
  min-height: 2.4rem;
  display: flex;
  align-items: center;
}

.status--inline {
  min-height: auto;
  padding: 0.6rem 0.85rem;
  width: fit-content;
}

.status--error {
  background: #fee2e2;
  color: #b91c1c;
}

.status--success {
  background: #dcfce7;
  color: #166534;
}

.summary-cards {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.summary-card {
  border: 1px solid #e5e7eb;
  border-radius: 1.1rem;
  padding: 1.25rem;
  background: #ffffff;
  box-shadow: inset 0 0 0 1px rgba(248, 250, 252, 0.6);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.summary-card h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.summary-card__value {
  font-size: 1.65rem;
  font-weight: 700;
  color: #111827;
  letter-spacing: -0.02em;
}

.summary-card__caption {
  margin: 0;
  color: #6b7280;
  font-size: 0.9rem;
}

.summary-card .activity-link {
  align-self: flex-start;
  margin-top: 0.35rem;
  padding: 0.35rem 0.8rem;
  font-size: 0.9rem;
}

.summary-card--highlight {
  grid-column: span 2;
  background: #fff9db;
  border-color: #fde68a;
}

.summary-card--highlight .summary-card__value {
  color: #b45309;
}

.activities {
  display: grid;
  gap: 1.5rem;
}

.activity-card {
  background: #ffffff;
  border-radius: 1.25rem;
  border: 1px solid #e2e8f0;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.04);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: box-shadow 180ms ease, transform 180ms ease;
}

.activity-card--run.activity-card--expanded {
  box-shadow: 0 16px 38px rgba(37, 99, 235, 0.18);
  transform: translateY(-2px);
}

.activity-card--workout {
  border-color: #fecaca;
}

.activity-card h2 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  color: #0f172a;
}

.activity-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.25rem;
}

.activity-card__title-block {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.activity-card__date {
  margin: 0;
  color: #64748b;
  font-size: 0.95rem;
}

.activity-card__sport {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: #eef2ff;
  border: 1px solid #dbeafe;
  color: #3730a3;
  font-weight: 600;
  font-size: 0.9rem;
}

.activity-card__sport--workout {
  background: #fef2f2;
  border-color: #fecaca;
  color: #b91c1c;
}

.activity-summary {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.9rem;
}

.activity-summary__item {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 0.9rem;
  padding: 0.75rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.activity-summary__label {
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: #94a3b8;
  font-weight: 600;
}

.activity-summary__value {
  font-size: 1.05rem;
  font-weight: 600;
  color: #0f172a;
}

.activity-card--workout .activity-summary__item {
  background: #fff7ed;
  border-color: #fed7aa;
}

.activity-card--workout .activity-summary__value {
  color: #9a3412;
}

.activity-card__toggle {
  align-self: flex-start;
  border: none;
  background: #fc4c02;
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 12px 26px rgba(252, 76, 2, 0.22);
  transition: background 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.activity-card__toggle:hover,
.activity-card__toggle:focus-visible {
  background: #d84302;
  box-shadow: 0 16px 34px rgba(216, 67, 2, 0.3);
  transform: translateY(-1px);
}

.activity-card--expanded .activity-card__toggle {
  background: #d84302;
}

.activity-card__details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.activity-card__details[hidden] {
  display: none;
}

.activity-notes {
  margin: 0;
  font-size: 0.95rem;
  color: #374151;
  background: #f9fafb;
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  border: 1px solid #edeff2;
}

.activity-visuals {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.visual-block {
  background: #f9fafb;
  border-radius: 1rem;
  border: 1px solid #e5e7eb;
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.visual-block h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: #1f2937;
}

.visual-block__body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.route-canvas,
.heart-rate-canvas {
  width: 100%;
  border-radius: 0.9rem;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
}

.visual-empty {
  padding: 0.75rem 0.85rem;
  border-radius: 0.75rem;
  background: #f3f4f6;
  color: #6b7280;
  font-size: 0.9rem;
  text-align: center;
}

.heart-rate-summary {
  margin: 0;
  font-size: 0.9rem;
  color: #0f172a;
  font-weight: 500;
}

.activity-footer {
  display: flex;
  justify-content: flex-end;
}

.activity-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  border: 1px solid #fed7aa;
  background: #fff7ed;
  color: #c2410c;
  font-weight: 600;
  text-decoration: none;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.activity-link:hover {
  background: #ffedd5;
  border-color: #f97316;
  transform: translateY(-1px);
}


@media (max-width: 768px) {
  .app-header {
    padding: 1.75rem 1.75rem 2rem;
  }

  .header-content {
    gap: 1.25rem;
  }

  .content {
    padding: 2rem 1.25rem 2.5rem;
  }

  .panel {
    padding: 1.5rem;
  }
}

@media (max-width: 640px) {
  .content {
    padding: 1.75rem 1rem 2.25rem;
  }

  .section-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.75rem;
  }

  .section-header h2 {
    font-size: 1.2rem;
  }

  .range-toggle {
    width: 100%;
    justify-content: space-between;
  }

  .toggle-button {
    flex: 1;
    text-align: center;
  }

  .panel,
  .activity-card {
    padding: 1.25rem;
  }

  .activity-card__header {
    flex-direction: column;
    gap: 0.6rem;
  }

  .activity-summary {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }

  .activity-visuals {
    grid-template-columns: 1fr;
  }

  .visual-block {
    padding: 0.9rem;
  }

  .status {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .header-text h1 {
    font-size: 1.75rem;
  }

  .summary-card--highlight {
    grid-column: span 1;
  }
}