/* ==========================================================================
   Button component — reusable .custom-btn
   Palette is inherited from the global theme (2026/assets/css/app.css):
     --primary-dark  #1a365d
     --primary       #2c5282
     --primary-light #4299e1
     --accent        #e53e3e
     --text-light    #f7fafc
   ========================================================================== */

.custom-btn {
  --btn-bg: var(--primary, #2c5282);
  --btn-bg-hover: var(--primary-dark, #1a365d);
  --btn-bg-active: #14304f;
  --btn-color: var(--text-light, #f7fafc);
  --btn-color-hover: var(--text-light, #f7fafc);
  --btn-border: transparent;
  --btn-shadow: 0 2px 6px rgba(26, 54, 93, 0.18);
  --btn-shadow-hover: 0 8px 18px rgba(26, 54, 93, 0.22);
  --btn-padding: 0.8rem 2rem;
  --btn-font-size: 1.05rem;
  --btn-radius: 6px;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-width: 0;
  max-width: 100%;
  padding: var(--btn-padding);
  border: 1px solid var(--btn-border);
  border-radius: var(--btn-radius);
  background-color: var(--btn-bg);
  color: var(--btn-color);
  font-family: inherit;
  font-size: var(--btn-font-size);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.02em;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: var(--btn-shadow);
  transition:
    background-color 0.3s ease,
    color 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease,
    transform 0.2s ease;
}

.custom-btn:hover {
  background-color: var(--btn-bg-hover);
  color: var(--btn-color-hover);
  transform: translateY(-2px);
  box-shadow: var(--btn-shadow-hover);
}

.custom-btn:active {
  background-color: var(--btn-bg-active);
  transform: translateY(0);
  box-shadow: var(--btn-shadow);
}

.custom-btn:focus-visible {
  outline: 2px solid var(--primary-light, #4299e1);
  outline-offset: 2px;
}

/* -------- Variants -------- */

.custom-btn--secondary {
  --btn-bg: var(--primary-light, #4299e1);
  --btn-bg-hover: var(--primary, #2c5282);
}

.custom-btn--outline {
  --btn-bg: transparent;
  --btn-bg-hover: var(--primary, #2c5282);
  --btn-color: var(--primary, #2c5282);
  --btn-color-hover: var(--text-light, #f7fafc);
  --btn-border: var(--primary, #2c5282);
  --btn-shadow: none;
  --btn-shadow-hover: 0 8px 18px rgba(26, 54, 93, 0.18);
}

.custom-btn--ghost {
  --btn-bg: #e7f1fa;
  --btn-bg-hover: #d3e6f7;
  --btn-color: var(--primary, #2c5282);
  --btn-color-hover: var(--primary-dark, #1a365d);
  --btn-shadow: none;
  --btn-shadow-hover: none;
}

.custom-btn--danger {
  --btn-bg: var(--accent, #e53e3e);
  --btn-bg-hover: #c53030;
}

/* -------- Sizes -------- */

.custom-btn--sm {
  --btn-padding: 0.5rem 1.2rem;
  --btn-font-size: 0.9rem;
}

.custom-btn--lg {
  --btn-padding: 0.95rem 2.4rem;
  --btn-font-size: 1.15rem;
}

/* -------- Layout modifiers -------- */

.custom-btn--block {
  display: flex;
  width: 100%;
}

/* -------- Disabled state -------- */

.custom-btn:disabled,
.custom-btn[disabled],
.custom-btn.is-disabled {
  background-color: #a0aec0;
  border-color: transparent;
  color: #ffffff;
  cursor: not-allowed;
  opacity: 0.85;
  transform: none;
  box-shadow: none;
  pointer-events: none;
}

@media (max-width: 480px) {
  .custom-btn {
    white-space: normal;
  }

  .custom-btn--lg {
    --btn-padding: 0.8rem 1.5rem;
    --btn-font-size: 1.05rem;
  }
}