/* ============================================================
   Button Components
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: 1;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--t-base);
  white-space: nowrap;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform var(--t-base);
}

.btn:hover svg { transform: translateX(3px); }

/* ── Primary (Red) ────────────────────────────────────────── */
.btn-primary {
  background: linear-gradient(135deg, var(--navy-600) 0%, var(--navy-700) 100%);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(30,64,175,0.35), 0 1px 3px rgba(0,0,0,0.12);
}

/* Shimmer sweep */
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.25) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.55s ease;
}

.btn-primary:hover::after {
  transform: translateX(100%);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--navy-500) 0%, var(--navy-600) 100%);
  box-shadow: 0 8px 28px rgba(30,64,175,0.5), 0 2px 8px rgba(0,0,0,0.15);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 3px 10px rgba(30,64,175,0.3);
}

/* ── Secondary (Slate/Dark) ───────────────────────────────── */
.btn-secondary {
  background-color: var(--slate-800);
  color: var(--color-white);
  border-color: var(--slate-800);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--slate-700);
  border-color: var(--slate-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ── Ghost (for dark backgrounds) ────────────────────────── */
.btn-ghost {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.4);
}

.btn-ghost:hover {
  background-color: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.8);
  transform: translateY(-2px);
}

/* ── Outline (for light backgrounds) ─────────────────────── */
.btn-outline {
  background-color: transparent;
  color: var(--navy-600);
  border-color: var(--navy-600);
}

.btn-outline:hover {
  background-color: var(--navy-50);
  transform: translateY(-2px);
}

/* ── Outline White ────────────────────────────────────────── */
.btn-outline-white {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}
.btn-outline-white:hover {
  background-color: var(--color-white);
  color: var(--navy-700);
}

/* ── Sizes ────────────────────────────────────────────────── */
.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-sm);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: var(--text-md);
  border-radius: var(--radius-lg);
}

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

/* ── Icon Only ────────────────────────────────────────────── */
.btn-icon {
  padding: 0.625rem;
  border-radius: var(--radius-md);
}
.btn-icon svg { width: 20px; height: 20px; }
.btn-icon:hover svg { transform: none; }