/* Base Styles & Typography Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
}

.main-container {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 0 1.25rem;
  flex: 1;
}

@media (max-width: 640px) {
  .main-container {
    padding: 0 0.75rem;
  }
}

/* Button Foundation - Pill Shaped & Tactile */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
  font-family: inherit;
  line-height: 1;
}

.btn:active {
  transform: scale(0.97);
}

.btn-tool {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-tool:hover {
  background: var(--bg-surface-hover);
  border-color: var(--accent);
  color: var(--text-main);
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.25);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  border-color: var(--border-color);
}

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

.btn-danger {
  background: transparent;
  color: var(--danger);
  border-color: var(--border-color);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
}

.btn-outline {
  background: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-color);
  box-shadow: var(--shadow-card);
}

.btn-outline:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--accent);
}