/**
 * INKEGG Design System - Buttons
 * Brutalist button components with terminal aesthetic
 */

/* ===== BASE BUTTON ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border: var(--border-width-md) solid var(--color-terminal-green);
  border-radius: var(--btn-border-radius);
  background-color: var(--color-bg-dark);
  color: var(--color-terminal-green);
  font-size: var(--btn-font-size);
  font-weight: var(--btn-font-weight);
  font-family: var(--font-primary);
  text-align: center;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: var(--btn-transition);
  box-shadow: var(--shadow-brutal);
  position: relative;
  white-space: nowrap;
}

.btn:hover:not(:disabled) {
  transform: translate(3px, 3px);
  box-shadow: none;
  text-shadow: var(--glow-green);
}

.btn:active:not(:disabled) {
  transform: translate(4px, 4px);
}

.btn:focus-visible {
  outline: 2px solid var(--color-cyberpunk-pink);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== BUTTON SIZES ===== */
.btn--sm {
  padding: var(--btn-padding-sm-y) var(--btn-padding-sm-x);
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-brutal-sm);
}

.btn--lg {
  padding: var(--btn-padding-lg-y) var(--btn-padding-lg-x);
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-brutal-lg);
}

.btn--full {
  width: 100%;
}

/* ===== BUTTON VARIANTS ===== */

/* Primary (Green Terminal) */
.btn--primary {
  border-color: var(--color-terminal-green);
  color: var(--color-terminal-green);
  box-shadow: var(--shadow-brutal);
}

.btn--primary:hover:not(:disabled) {
  background-color: rgba(51, 255, 51, 0.1);
  text-shadow: var(--glow-green);
}

/* Secondary (Cyberpunk Pink) */
.btn--secondary {
  border-color: var(--color-cyberpunk-pink);
  color: var(--color-cyberpunk-pink);
  box-shadow: var(--shadow-brutal-pink);
}

.btn--secondary:hover:not(:disabled) {
  background-color: var(--color-pink-transparent);
  text-shadow: var(--glow-pink);
  border-color: var(--color-pink-light);
}

/* Solid (Filled) */
.btn--solid {
  background-color: var(--color-terminal-green);
  color: var(--color-bg-black);
  border-color: var(--color-terminal-green);
}

.btn--solid:hover:not(:disabled) {
  background-color: #00ff00;
  box-shadow: var(--glow-green-lg);
}

.btn--solid-pink {
  background-color: var(--color-cyberpunk-pink);
  color: var(--color-bg-black);
  border-color: var(--color-cyberpunk-pink);
  box-shadow: var(--shadow-brutal-pink);
}

.btn--solid-pink:hover:not(:disabled) {
  background-color: var(--color-pink-light);
  box-shadow: var(--glow-pink-lg);
}

/* Ghost (Outline only, no background) */
.btn--ghost {
  background-color: transparent;
  box-shadow: none;
}

.btn--ghost:hover:not(:disabled) {
  background-color: rgba(51, 255, 51, 0.05);
  transform: none;
  box-shadow: var(--glow-green);
}

/* Link Style (Underlined, no border) */
.btn--link {
  border: none;
  background: transparent;
  box-shadow: none;
  text-decoration: underline;
  padding: var(--space-xs) var(--space-sm);
}

.btn--link:hover:not(:disabled) {
  transform: none;
  text-decoration: none;
  text-shadow: var(--glow-green);
}

/* Danger (Red) */
.btn--danger {
  border-color: var(--color-text-error);
  color: var(--color-text-error);
  box-shadow: 4px 4px 0 0 var(--color-text-error);
}

.btn--danger:hover:not(:disabled) {
  background-color: rgba(255, 97, 136, 0.1);
}

/* Success (Lime Green) */
.btn--success {
  border-color: var(--color-text-success);
  color: var(--color-text-success);
  box-shadow: 4px 4px 0 0 var(--color-text-success);
}

/* ===== BUTTON GROUPS ===== */
.btn-group {
  display: inline-flex;
  gap: var(--space-sm);
}

.btn-group--attached {
  gap: 0;
}

.btn-group--attached .btn {
  border-radius: 0;
  margin-left: -2px;
}

.btn-group--attached .btn:first-child {
  border-top-left-radius: var(--btn-border-radius);
  border-bottom-left-radius: var(--btn-border-radius);
  margin-left: 0;
}

.btn-group--attached .btn:last-child {
  border-top-right-radius: var(--btn-border-radius);
  border-bottom-right-radius: var(--btn-border-radius);
}

/* ===== ICON BUTTONS ===== */
.btn--icon {
  padding: var(--space-sm);
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
}

.btn--icon-sm {
  padding: var(--space-xs);
  width: 32px;
  height: 32px;
}

.btn--icon-lg {
  padding: var(--space-md);
  width: 48px;
  height: 48px;
}

/* Icon with text */
.btn svg,
.btn img {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.btn--icon-left svg,
.btn--icon-left img {
  margin-right: var(--space-sm);
}

.btn--icon-right svg,
.btn--icon-right img {
  margin-left: var(--space-sm);
}

/* ===== LOADING STATE ===== */
.btn--loading {
  position: relative;
  pointer-events: none;
  color: transparent;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* ===== CLOSE BUTTON ===== */
.btn--close {
  padding: 0;
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-cyberpunk-pink);
  background: transparent;
  border-radius: 50%;
  font-size: var(--font-size-xl);
  line-height: 1;
  color: var(--color-cyberpunk-pink);
  box-shadow: none;
}

.btn--close:hover:not(:disabled) {
  background-color: var(--color-cyberpunk-pink);
  color: var(--color-bg-black);
  transform: none;
  box-shadow: var(--glow-pink);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .btn {
    padding: 10px 20px;
    font-size: var(--font-size-sm);
  }

  .btn--full-mobile {
    width: 100%;
  }

  .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-group .btn {
    width: 100%;
  }
}

/* ===== LEGACY SUPPORT (for gradual migration) ===== */
.basic-button,
.custom-button {
  /* Map to new button system */
  @extend .btn;
  @extend .btn--primary;
}

.basic-pink-button {
  /* Map to pink variant */
  @extend .btn;
  @extend .btn--secondary;
}