/* ==========================================================================
   Reusable Components — Buttons, Cards, Badges, Icons
   Anthropic-inspired: clean, warm, refined
   ========================================================================== */

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.8125rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  border: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.btn--primary {
  background-color: var(--color-accent-green);
  color: #ffffff;
}

.btn--primary:hover {
  background-color: var(--color-accent-green-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(45, 106, 79, 0.25);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-accent-green);
  border: 1.5px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-accent-green);
  background-color: var(--color-accent-green-pale);
  transform: translateY(-1px);
}

.btn--ghost {
  background: none;
  color: var(--color-text-heading);
  padding: 0.5rem 0;
  font-weight: 500;
}

.btn--ghost:hover {
  color: var(--color-accent-green);
}

.btn--ghost .btn-arrow {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  margin-left: var(--space-xs);
}

.btn--ghost:hover .btn-arrow {
  transform: translateX(5px);
}

/* Button ripple container */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: scale(0);
  pointer-events: none;
}

/* ---- Cards ---- */
.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-green-pale);
}

.card__icon {
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-xl);
  color: var(--color-accent-green);
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.card:hover .card__icon {
  opacity: 1;
}

.card__title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
}

.card__description {
  font-size: var(--text-sm);
  color: var(--color-text-body);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-xl);
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent-green);
  transition: gap 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.card__link:hover {
  gap: 10px;
}

.card__link-arrow {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  font-size: 0.85em;
}

.card__link:hover .card__link-arrow {
  transform: translateX(2px);
}

@media (max-width: 768px) {
  .card {
    padding: var(--space-xl);
  }
}

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--radius-full);
  background-color: var(--color-accent-green-pale);
  color: var(--color-accent-green);
}

.badge--popular {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  background-color: var(--color-accent-terracotta);
  color: #ffffff;
  font-size: 0.6875rem;
  padding: 0.25rem 0.625rem;
  letter-spacing: 0.06em;
}

.badge--cert {
  background-color: transparent;
  color: var(--color-text-heading);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 0.375rem 1rem;
  letter-spacing: 0.06em;
  transition: all 0.2s ease;
}

.badge--cert:hover {
  border-color: var(--color-accent-green);
  color: var(--color-accent-green);
}

/* ---- Section Headers ---- */
.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-green);
  margin-bottom: var(--space-lg);
}

.section-heading {
  font-size: var(--text-4xl);
  font-weight: 400;
  color: var(--color-text-heading);
  margin-bottom: var(--space-lg);
  letter-spacing: var(--tracking-tight);
  max-width: 680px;
}

.section-subheading {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 540px;
  line-height: var(--leading-relaxed);
}

/* ---- Divider ---- */
.divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-border);
  border: none;
}

/* ---- Icon Wrapper ---- */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.icon svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---- Dark Mode Toggle ---- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--color-text-muted);
}

.theme-toggle:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-heading);
  border-color: var(--color-border);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease, opacity 0.2s ease;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-moon,
:root:not([data-theme]) .theme-toggle .icon-moon {
  display: none;
}