/* =============================================================================
   GAUCHOGRID — SHARED COMPONENTS
   Version 1.2 - Unified Mobile Menu + Fixed Footer Grid
   ============================================================================= */

/* =============================================================================
   BUTTONS
   ============================================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-slow);
  white-space: nowrap;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Primary Button - Green CTA */
.btn--primary {
  background: var(--color-primary);
  color: #000000;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: var(--shadow-glow-strong);
  transform: translateY(-2px);
}

.btn--primary:active {
  transform: translateY(0);
}

/* Secondary Button - Outline */
.btn--secondary {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border-default);
}

.btn--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(34, 197, 94, 0.05);
}

/* Ghost Button - Minimal */
.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border-neutral);
}

.btn--ghost:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(34, 197, 94, 0.05);
}

/* Size Variants */
.btn--small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn--large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

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

@media (max-width: 479px) {
  .btn--large {
    width: 100%;
  }
}

/* =============================================================================
   CARDS
   ============================================================================= */
.card {
  background: linear-gradient(135deg, 
    rgba(20, 20, 20, 0.9), 
    rgba(30, 30, 30, 0.8)
  );
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-slow);
}

.card:hover {
  border-color: var(--color-border-emphasis);
  transform: translateY(-2px);
}

.card--clickable {
  cursor: pointer;
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-success-bg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.card__icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.card__description {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  line-height: var(--leading-relaxed);
}

/* Featured Card */
.card--featured {
  border: 2px solid var(--color-primary);
  background: linear-gradient(135deg, 
    rgba(34, 197, 94, 0.05), 
    rgba(20, 20, 20, 0.95)
  );
  position: relative;
}

.card--featured::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* =============================================================================
   HEADER
   ============================================================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-neutral);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.header__logo svg {
  width: 32px;
  height: 32px;
}

.header__nav {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .header__nav {
    display: flex;
  }
}

.header__link {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  transition: color var(--transition-base);
}

.header__link:hover,
.header__link--active {
  color: var(--color-primary);
}

.header__actions {
  display: none;
  align-items: center;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .header__actions {
    display: flex;
  }
}

/* Mobile Menu Toggle */
.header__mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.header__mobile-toggle:hover {
  background: var(--color-surface-1);
  color: var(--color-text-primary);
}

.header__mobile-toggle svg {
  width: 24px;
  height: 24px;
}

@media (min-width: 768px) {
  .header__mobile-toggle {
    display: none;
  }
}

/* =============================================================================
   MOBILE MENU — UNIFIED (Left-to-right, full-width, solid background)
   ============================================================================= */
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: #0a0a0a;
  padding: var(--space-6);
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
}

.mobile-menu__link {
  display: block;
  padding: var(--space-4) var(--space-4);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.mobile-menu__link:hover,
.mobile-menu__link:focus {
  background: var(--color-surface-1);
  color: var(--color-primary);
}

.mobile-menu__link--active {
  background: var(--color-success-bg);
  color: var(--color-primary);
}

.mobile-menu__divider {
  height: 1px;
  background: var(--color-border-neutral);
  margin: var(--space-4) 0;
}

.mobile-menu__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-neutral);
}

/* Mobile Menu Overlay */
.mobile-overlay {
  position: fixed;
  inset: 0;
  top: 64px;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 98;
}

.mobile-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

@media (min-width: 768px) {
  .mobile-menu,
  .mobile-overlay {
    display: none !important;
  }
}

/* =============================================================================
   FOOTER — FIXED MOBILE GRID
   ============================================================================= */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-neutral);
  padding: var(--space-12) 0 var(--space-8);
}

@media (min-width: 768px) {
  .footer {
    padding: var(--space-16) 0 var(--space-8);
  }
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8) var(--space-6);
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
    margin-bottom: var(--space-12);
  }
}

.footer__brand {
  grid-column: 1 / -1;
}

@media (min-width: 768px) {
  .footer__brand {
    grid-column: auto;
    max-width: 280px;
  }
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

@media (min-width: 768px) {
  .footer__logo {
    margin-bottom: var(--space-4);
  }
}

.footer__logo svg {
  width: 28px;
  height: 28px;
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

.footer__column-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-quaternary);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (min-width: 768px) {
  .footer__column-title {
    font-size: var(--text-sm);
    margin-bottom: var(--space-4);
  }
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .footer__links {
    gap: var(--space-3);
  }
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  transition: color var(--transition-base);
}

.footer__link:hover {
  color: var(--color-primary);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-neutral);
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
  }
}

.footer__copyright {
  font-size: var(--text-sm);
  color: var(--color-text-quaternary);
}

.footer__social {
  display: flex;
  gap: var(--space-4);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--color-text-tertiary);
  transition: color var(--transition-base);
}

.footer__social-link:hover {
  color: var(--color-primary);
}

.footer__social-link svg {
  width: 20px;
  height: 20px;
}

/* =============================================================================
   BADGES
   ============================================================================= */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid;
}

.badge--success {
  background: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success);
}

.badge--info {
  background: var(--color-info-bg);
  border-color: var(--color-info);
  color: var(--color-info);
}

.badge--warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.badge--pro {
  background: var(--color-success-bg);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* =============================================================================
   PILLS (Feature indicators)
   ============================================================================= */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-1);
  border: 1px solid var(--color-border-neutral);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.pill svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

/* =============================================================================
   SECTION HEADERS
   ============================================================================= */
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header__label {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.section-header__title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.section-header__description {
  font-size: var(--text-lg);
  color: var(--color-text-tertiary);
  max-width: 640px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .section-header__title {
    font-size: var(--text-4xl);
  }
}

/* =============================================================================
   BREADCRUMBS
   ============================================================================= */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.breadcrumb__link {
  color: var(--color-text-tertiary);
  transition: color var(--transition-base);
}

.breadcrumb__link:hover {
  color: var(--color-primary);
}

.breadcrumb__separator {
  color: var(--color-text-quaternary);
}

.breadcrumb__current {
  color: var(--color-text-secondary);
}

/* =============================================================================
   FORM ELEMENTS
   ============================================================================= */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-1);
  border: 1px solid var(--color-border-neutral);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  transition: border-color var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-quaternary);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* =============================================================================
   ALERTS
   ============================================================================= */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid;
}

.alert--success {
  background: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert--info {
  background: var(--color-info-bg);
  border-color: var(--color-info);
  color: var(--color-info);
}

.alert--warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert--error {
  background: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-error);
}

.alert svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* =============================================================================
   DIVIDERS
   ============================================================================= */
.divider {
  height: 1px;
  background: var(--color-border-neutral);
  margin: var(--space-8) 0;
}

.divider--accent {
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-border-default),
    transparent
  );
}

/* =============================================================================
   LOADING STATES
   ============================================================================= */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border-default);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* =============================================================================
   ANIMATIONS
   ============================================================================= */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}