/* ============================================
   COMPONENTS — Reusable UI Patterns
   ============================================ */

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-full);
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-accent);
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-hover);
}

.btn-secondary:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

.btn-text {
  padding: 0;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  border-radius: 0;
}

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

.btn-text .arrow {
  display: inline-block;
  transition: transform var(--duration-base) var(--ease-out);
}

.btn-text:hover .arrow {
  transform: translateX(4px);
}

/* ---- Section Label (small uppercase) ---- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-6);
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-accent);
}

/* ---- Section Heading ---- */
.section-heading {
  font-family: var(--font-serif);
  font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
  font-weight: var(--weight-regular);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
}

.section-heading em {
  font-style: italic;
  color: var(--color-accent);
}

.section-subheading {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 560px;
  margin-top: var(--space-4);
}

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--duration-base) var(--ease-out);
}

.card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface-hover);
}

/* ---- Tags ---- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  background: var(--color-accent-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  letter-spacing: var(--tracking-wide);
}

/* ---- Divider ---- */
.divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  border: none;
  margin: var(--space-16) 0;
}

/* ---- Reveal Animations ---- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.stagger-children.revealed > *:nth-child(1)  { transition-delay: 0ms; }
.stagger-children.revealed > *:nth-child(2)  { transition-delay: 80ms; }
.stagger-children.revealed > *:nth-child(3)  { transition-delay: 160ms; }
.stagger-children.revealed > *:nth-child(4)  { transition-delay: 240ms; }
.stagger-children.revealed > *:nth-child(5)  { transition-delay: 320ms; }
.stagger-children.revealed > *:nth-child(6)  { transition-delay: 400ms; }
.stagger-children.revealed > *:nth-child(7)  { transition-delay: 480ms; }
.stagger-children.revealed > *:nth-child(8)  { transition-delay: 560ms; }

.stagger-children.revealed > * {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Text Gradient ---- */
.text-gradient {
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Metric Number ---- */
.metric-number {
  font-family: var(--font-sans);
  font-size: var(--text-4xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  line-height: var(--leading-none);
}

.metric-label {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  letter-spacing: var(--tracking-wide);
  margin-top: var(--space-2);
}

/* ---- Image Container ---- */
.img-reveal {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.img-reveal img {
  transition: transform var(--duration-slow) var(--ease-out);
}

.img-reveal:hover img {
  transform: scale(1.03);
}