/* ==========================================================================
   AtlasKeys — Buttons, badges, chips, inputs
   ========================================================================== */

.btn {
  --btn-bg: var(--color-surface-2);
  --btn-fg: var(--color-text);
  --btn-bd: var(--color-border-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.7rem 1.25rem;
  min-height: 44px;            /* touch target */
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.01em;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--t-fast) var(--ease),
              background-color var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease),
              box-shadow var(--t-base) var(--ease),
              opacity var(--t-base) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled,
.btn[aria-disabled="true"],
.btn.is-loading { opacity: 0.55; pointer-events: none; }

.btn svg { width: 18px; height: 18px; flex: none; }

/* Variants */
.btn--primary {
  --btn-fg: var(--color-text-on-accent);
  --btn-bd: transparent;
  background: var(--grad-primary);
  box-shadow: 0 6px 20px rgba(124,58,237,0.30);
}
.btn--primary:hover { box-shadow: 0 10px 30px rgba(124,58,237,0.45); }

.btn--ghost { --btn-bg: transparent; --btn-bd: var(--color-border-strong); }
.btn--ghost:hover { --btn-bg: var(--color-surface-2); border-color: var(--color-border-primary); }

.btn--subtle { --btn-bg: var(--color-primary-soft); --btn-fg: var(--color-primary-300); --btn-bd: transparent; }
.btn--subtle:hover { --btn-bg: rgba(124,58,237,0.26); }

.btn--danger { --btn-bg: var(--color-danger-soft); --btn-fg: var(--color-danger); --btn-bd: transparent; }
.btn--danger:hover { --btn-bg: rgba(242,84,91,0.24); }

.btn--success { --btn-bg: var(--color-success-soft); --btn-fg: var(--color-success); --btn-bd: transparent; }

/* Theme toggle: show sun in dark mode (switch to light), moon in light mode */
.theme-ico { width: 20px; height: 20px; }
.theme-ico--moon { display: none; }
[data-theme="light"] .theme-ico--sun { display: none; }
[data-theme="light"] .theme-ico--moon { display: block; }

.btn--link { --btn-bg: transparent; --btn-bd: transparent; min-height: auto; padding: 0.25rem 0.25rem; color: var(--color-primary-300); }
.btn--link:hover { color: var(--color-primary-400); text-decoration: underline; transform: none; }

/* Sizes */
.btn--sm { padding: 0.45rem 0.85rem; min-height: 36px; font-size: var(--fs-xs); }
.btn--lg { padding: 0.95rem 1.75rem; min-height: 52px; font-size: var(--fs-base); }
.btn--block { display: flex; width: 100%; }
.btn--icon { padding: 0; width: 44px; height: 44px; min-height: 44px; }
.btn--icon.btn--sm { width: 36px; height: 36px; }

/* Loading spinner injected via ::after when .is-loading */
.btn.is-loading { position: relative; color: transparent !important; }
.btn.is-loading::after {
  content: "";
  position: absolute;
  width: 18px; height: 18px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  color: var(--color-text);
  animation: btn-spin 0.7s linear infinite;
}
.btn--primary.is-loading::after { color: #fff; }
@keyframes btn-spin { to { transform: rotate(360deg); } }

/* ---------- Badges & chips ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.28em 0.7em;
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  border-radius: var(--radius-pill);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.badge--primary { background: var(--color-primary-soft); color: var(--color-primary-300); border-color: transparent; }
.badge--success { background: var(--color-success-soft); color: var(--color-success); border-color: transparent; }
.badge--warning { background: var(--color-warning-soft); color: var(--color-warning); border-color: transparent; }
.badge--danger  { background: var(--color-danger-soft); color: var(--color-danger); border-color: transparent; }
.badge--info    { background: var(--color-info-soft); color: var(--color-info); border-color: transparent; }
.badge--dot::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem 0.9rem;
  min-height: 40px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease),
              background-color var(--t-base) var(--ease);
}
.chip:hover { color: var(--color-text); border-color: var(--color-border-primary); }
.chip[aria-pressed="true"], .chip.is-active {
  color: var(--color-text-on-accent);
  background: var(--color-primary-soft);
  border-color: var(--color-border-primary);
  color: var(--color-primary-300);
}

/* ---------- Form controls ---------- */
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field label, .label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
}
.input, .select, .textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  min-height: 48px;
  font-size: var(--fs-base);
  color: var(--color-text);
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}
.textarea { min-height: 120px; resize: vertical; line-height: var(--lh-base); }
.input::placeholder, .textarea::placeholder { color: var(--color-text-dim); }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}
.input:disabled, .select:disabled, .textarea:disabled { opacity: 0.5; cursor: not-allowed; }
.field--error .input,
.field--error .select,
.field--error .textarea { border-color: var(--color-danger); }
.field__error { font-size: var(--fs-sm); color: var(--color-danger); }
.field__hint  { font-size: var(--fs-sm); color: var(--color-text-dim); }

/* Input with leading icon */
.input-group { position: relative; display: flex; align-items: center; }
.input-group .input { padding-left: 2.85rem; }
.input-group__icon {
  position: absolute;
  left: 1rem;
  width: 18px; height: 18px;
  color: var(--color-text-dim);
  pointer-events: none;
}

/* Checkbox / toggle */
.switch { position: relative; display: inline-flex; align-items: center; gap: var(--space-3); cursor: pointer; }
.switch input { position: absolute; opacity: 0; }
.switch__track {
  width: 44px; height: 26px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-strong);
  transition: background-color var(--t-base) var(--ease);
  flex: none;
}
.switch__track::after {
  content: "";
  position: absolute;
  top: 4px; left: 4px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--color-text);
  transition: transform var(--t-base) var(--ease-spring);
}
.switch input:checked + .switch__track { background: var(--color-primary); border-color: transparent; }
.switch input:checked + .switch__track::after { transform: translateX(18px); }
.switch input:focus-visible + .switch__track { box-shadow: var(--shadow-focus); }