/* ═══════════════════════════════════════════════════════════
   atr-btn — Unified button component
   Usage:  <button class="atr-btn atr-btn--primary">Label</button>
   Sizes:  (default md) · --sm · --lg
   Variants: --primary · --outline · --ghost · --danger · --link
   Special: --full (100% width) · --icon (square) · --loading
   Demo:   /static/components-demo.html#btn
   ═══════════════════════════════════════════════════════════ */

/* ── Base ─────────────────────────────────────────────────── */
.atr-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 18px;
  height: 40px;
  border-radius: var(--ds-radius-md, 12px);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease,
    opacity 0.15s ease,
    transform 0.1s ease,
    box-shadow 0.15s ease;
}
.atr-btn:active:not(:disabled) { transform: scale(0.97); }
.atr-btn:disabled               { opacity: 0.45; cursor: not-allowed; }
.atr-btn:focus-visible          { outline: 2px solid var(--atr-accent, #e8622a); outline-offset: 3px; }
.atr-btn i, .atr-btn svg        { font-size: 13px; flex-shrink: 0; }

/* ── Sizes ────────────────────────────────────────────────── */
.atr-btn--sm { height: 32px; padding: 0 12px; font-size: 12.5px; border-radius: var(--ds-radius-sm, 10px); }
.atr-btn--lg { height: 48px; padding: 0 24px; font-size: 15px;   border-radius: 14px; }

/* Full-width */
.atr-btn--full { width: 100%; }

/* Icon-only (square) */
.atr-btn--icon               { width: 40px; padding: 0; border-radius: 10px; }
.atr-btn--icon.atr-btn--sm  { width: 32px; border-radius: 8px; }
.atr-btn--icon.atr-btn--lg  { width: 48px; border-radius: 12px; }

/* ── Variants ─────────────────────────────────────────────── */

/* Primary */
.atr-btn--primary {
  background: var(--atr-accent, #e8622a);
  color: #fff;
  border-color: var(--atr-accent, #e8622a);
}
.atr-btn--primary:hover:not(:disabled) {
  background: var(--atr-accent-strong, #c95522);
  border-color: var(--atr-accent-strong, #c95522);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--atr-accent, #e8622a) 30%, transparent);
}

/* Outline */
.atr-btn--outline {
  background: transparent;
  color: var(--atr-accent, #e8622a);
  border-color: var(--atr-accent, #e8622a);
}
.atr-btn--outline:hover:not(:disabled) {
  background: color-mix(in srgb, var(--atr-accent, #e8622a) 6%, transparent);
}

/* Ghost */
.atr-btn--ghost {
  background: transparent;
  color: var(--ds-text-secondary, #6b7280);
  border-color: var(--atr-border, #e5e7eb);
}
.atr-btn--ghost:hover:not(:disabled) {
  background: var(--ds-surface-muted, #f7f7f8);
  color: var(--ds-text, #1a1a1a);
  border-color: var(--atr-border-strong, #d9d9d9);
}

/* Danger */
.atr-btn--danger {
  background: var(--atr-danger, #d14343);
  color: #fff;
  border-color: var(--atr-danger, #d14343);
}
.atr-btn--danger:hover:not(:disabled) {
  background: color-mix(in srgb, var(--atr-danger, #d14343) 85%, #000);
}

/* Link */
.atr-btn--link {
  background: none;
  border: none;
  color: var(--atr-accent, #e8622a);
  padding: 0;
  height: auto;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.atr-btn--link:hover:not(:disabled) { color: var(--atr-accent-strong, #c95522); }

/* ── Loading spinner state ────────────────────────────────── */
.atr-btn--loading { pointer-events: none; opacity: 0.8; }
.atr-btn--loading::after {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: atr-btn-spin 0.65s linear infinite;
  flex-shrink: 0;
  margin-inline-start: 4px;
}
@keyframes atr-btn-spin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════════════════════════════
   ALIASES — existing class names → atr-btn styles
   These let legacy HTML adopt the new system without markup changes.
   ═══════════════════════════════════════════════════════════ */

/* ── Login pages ──────────────────────────────────────────── */
.submit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--ds-radius-md, 12px);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--atr-accent, #e8622a);
  background: var(--atr-accent, #e8622a);
  color: #fff;
  transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease, transform 0.1s ease;
  -webkit-tap-highlight-color: transparent;
}
.submit-btn:hover:not(:disabled) {
  background: var(--atr-accent-strong, #c95522);
  border-color: var(--atr-accent-strong, #c95522);
}
.submit-btn:active:not(:disabled) { transform: scale(0.98); }
.submit-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.employee-login-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--ds-radius-md, 12px);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: var(--atr-accent, #d4521e);
  color: #fff;
  transition: background 0.15s ease, transform 0.1s ease;
  -webkit-tap-highlight-color: transparent;
}
.employee-login-btn:hover:not(:disabled) { background: var(--atr-accent-strong, #b8421a); }
.employee-login-btn:active:not(:disabled) { transform: scale(0.98); }
.employee-login-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Admin panel action buttons ───────────────────────────── */
.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  border-radius: 9px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid #d9d9d9;
  background: transparent;
  color: #6b7280;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, opacity 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}
.action-btn:hover:not(:disabled) {
  background: #f7f7f8;
  color: #1a1a1a;
  border-color: #c0c0c0;
}
.action-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.action-btn.primary {
  background: var(--atr-accent, #e8622a);
  color: #fff;
  border-color: var(--atr-accent, #e8622a);
}
.action-btn.primary:hover:not(:disabled) {
  background: var(--atr-accent-strong, #c95522);
  border-color: var(--atr-accent-strong, #c95522);
}

.action-btn.danger {
  background: #d14343;
  color: #fff;
  border-color: #d14343;
}
.action-btn.danger:hover:not(:disabled) {
  background: #b83636;
  border-color: #b83636;
}