/* Buttons, icon buttons, icons and the logo. */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  /* 2.75rem = 44px: big enough to tap with a finger. */
  min-height: 2.75rem;
  padding: 0.625rem 1.25rem;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary,
.btn-primary:hover {
  background: var(--color-brand);
  color: var(--color-on-brand);
}

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

.btn-secondary,
.btn-secondary:hover {
  border-color: var(--color-border-strong);
  background: var(--color-surface);
  color: var(--color-text);
}

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

/* Less padding and smaller text, but the same height: still easy to tap. */
.btn-small {
  padding: 0.5rem 1rem;
  font-size: var(--text-sm);
}

/* A square button that only shows an icon (menu, theme). */
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text);
}

.icon-btn:hover {
  background: var(--color-bg-alt);
}

/* All icons are line drawings. They take the text color of their parent. */
.icon {
  flex: none;
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Show "menu" when the menu is closed and "close" when it is open. */
.icon-close,
[aria-expanded="true"] > .icon-menu {
  display: none;
}

[aria-expanded="true"] > .icon-close {
  display: block;
}

/* Same idea for the theme button: moon in light mode, sun in dark mode. */
.icon-sun,
[data-theme="dark"] .icon-moon {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: block;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.logo:hover {
  color: var(--color-text);
}

/* The logo has two parts: the square uses "fill", the waves use "stroke". */
.logo-mark {
  width: 2rem;
  height: 2rem;
  fill: var(--color-brand);
  stroke: var(--color-on-brand);
}