/**
 * Cuya Design System
 * Based on Apple.com design language — clean, minimal, typography-led.
 *
 * Tokens, typography, spacing, and component primitives.
 * Import this in every HTML surface for visual consistency.
 */

:root {
  /* ─── Color ─────────────────────────────────────────────────────────── */

  /* Primary accent — used sparingly, only for CTAs and interactive elements */
  --cuya-accent: #0071e3;
  --cuya-accent-hover: #0077ed;
  --cuya-accent-active: #0066cc;
  --cuya-accent-text: #2997ff;
  --cuya-accent-text-hover: #0066cc;

  /* Secondary accent — vivid pink for highlights, metrics, emphasis */
  --cuya-pink: #f43f5e;
  --cuya-pink-soft: #fff1f2;
  --cuya-pink-muted: #be123c;
  --cuya-pink-glow: rgba(244, 63, 94, 0.15);

  /* Neutral scale */
  --cuya-text: #1d1d1f;
  --cuya-text-muted: #6e6e73;
  --cuya-text-faint: #86868b;
  --cuya-bg: #f5f5f7;
  --cuya-bg-alt: #ffffff;
  --cuya-surface: #fafafc;
  --cuya-border: #d2d2d7;
  --cuya-border-strong: #b9bbc6;

  /* Dark surfaces */
  --cuya-dark: #000000;
  --cuya-dark-surface: #1d1d1f;
  --cuya-text-inverse: #f5f5f7;

  /* Semantic */
  --cuya-success: #16833a;
  --cuya-warning: #9a6700;
  --cuya-error: #c02f2f;

  /* ─── Typography ────────────────────────────────────────────────────── */

  --cuya-font: "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --cuya-font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --cuya-font-mono: "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Scale */
  --cuya-text-display: 56px;
  --cuya-text-h1: 44px;
  --cuya-text-h2: 28px;
  --cuya-text-h3: 21px;
  --cuya-text-body: 17px;
  --cuya-text-small: 14px;
  --cuya-text-caption: 12px;

  /* ─── Spacing (4px base) ────────────────────────────────────────────── */

  --cuya-space-1: 4px;
  --cuya-space-2: 8px;
  --cuya-space-3: 12px;
  --cuya-space-4: 16px;
  --cuya-space-5: 20px;
  --cuya-space-6: 24px;
  --cuya-space-8: 32px;
  --cuya-space-12: 48px;
  --cuya-space-16: 64px;
  --cuya-space-20: 80px;
  --cuya-space-32: 128px;

  /* ─── Layout ────────────────────────────────────────────────────────── */

  --cuya-max-width: 980px;
  --cuya-max-width-wide: 1068px;

  /* ─── Radius ────────────────────────────────────────────────────────── */

  --cuya-radius-sm: 8px;
  --cuya-radius-md: 11px;
  --cuya-radius-full: 9999px;

  /* ─── Motion ────────────────────────────────────────────────────────── */

  --cuya-ease: cubic-bezier(0.4, 0, 0.6, 1);
  --cuya-duration: 320ms;

  /* ─── Shadow (used sparingly) ───────────────────────────────────────── */

  --cuya-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --cuya-shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.12);
}

/* ─── Reset ───────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--cuya-font);
  font-size: var(--cuya-text-body);
  line-height: 1.4;
  color: var(--cuya-text);
  background: var(--cuya-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--cuya-accent-text);
  text-decoration: none;
  transition: color var(--cuya-duration) var(--cuya-ease);
}
a:hover {
  color: var(--cuya-accent-text-hover);
  text-decoration: underline;
}

/* ─── Typography ──────────────────────────────────────────────────────── */

.cuya-display {
  font-family: var(--cuya-font-display);
  font-size: var(--cuya-text-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.cuya-h1 {
  font-family: var(--cuya-font);
  font-size: var(--cuya-text-h1);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.cuya-h2 {
  font-family: var(--cuya-font);
  font-size: var(--cuya-text-h2);
  font-weight: 600;
  line-height: 1.2;
}

.cuya-h3 {
  font-family: var(--cuya-font);
  font-size: var(--cuya-text-h3);
  font-weight: 600;
  line-height: 1.3;
}

.cuya-body {
  font-size: var(--cuya-text-body);
  font-weight: 400;
  line-height: 1.4;
}

.cuya-small {
  font-size: var(--cuya-text-small);
  font-weight: 400;
  line-height: 1.5;
  color: var(--cuya-text-muted);
}

.cuya-caption {
  font-size: var(--cuya-text-caption);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--cuya-text-muted);
}

/* ─── Buttons ─────────────────────────────────────────────────────────── */

.cuya-btn {
  display: inline-block;
  font-family: var(--cuya-font);
  font-size: var(--cuya-text-body);
  font-weight: 400;
  line-height: 1;
  text-align: center;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--cuya-radius-full);
  cursor: pointer;
  transition: background-color 0.2s ease-out, color 0.2s ease-out, border-color 0.2s ease-out;
  text-decoration: none;
}

.cuya-btn:hover { text-decoration: none; }

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

.cuya-btn--secondary {
  background-color: transparent;
  color: var(--cuya-accent-text);
  border-color: var(--cuya-accent-text);
}
.cuya-btn--secondary:hover {
  background-color: var(--cuya-accent-text);
  color: #ffffff;
}
.cuya-btn--secondary:active {
  background-color: var(--cuya-accent-text-hover);
  border-color: var(--cuya-accent-text-hover);
}

.cuya-btn--ghost {
  background-color: transparent;
  color: var(--cuya-accent-text);
  padding: 0;
  border: none;
  border-radius: 0;
}
.cuya-btn--ghost:hover {
  color: var(--cuya-accent-text-hover);
  text-decoration: underline;
}

.cuya-btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

/* ─── Forms ───────────────────────────────────────────────────────────── */

.cuya-label {
  display: block;
  font-size: var(--cuya-text-small);
  font-weight: 400;
  color: var(--cuya-text-muted);
  margin-bottom: var(--cuya-space-2);
}

.cuya-input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--cuya-font);
  font-size: var(--cuya-text-body);
  color: var(--cuya-text);
  background-color: var(--cuya-bg-alt);
  border: 1px solid var(--cuya-border);
  border-radius: var(--cuya-radius-sm);
  transition: border-color 0.2s ease-out, box-shadow 0.2s ease-out;
}

.cuya-input:focus,
.cuya-input:focus-visible {
  border-color: var(--cuya-accent);
  outline: 2px solid var(--cuya-accent);
  outline-offset: 3px;
}

.cuya-input::placeholder {
  color: var(--cuya-text-faint);
}

/* ─── Cards ───────────────────────────────────────────────────────────── */

.cuya-card {
  background-color: var(--cuya-bg-alt);
  border-radius: var(--cuya-radius-md);
  padding: var(--cuya-space-12);
  overflow: hidden;
}

/* ─── Navigation ──────────────────────────────────────────────────────── */

.cuya-nav {
  position: sticky;
  top: 0;
  width: 100%;
  height: 44px;
  background-color: rgba(250, 250, 252, 0.7);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  z-index: 9999;
  display: flex;
  align-items: center;
  padding: 0 clamp(18px, 4vw, 56px);
  gap: var(--cuya-space-6);
}

.cuya-nav__link {
  font-size: var(--cuya-text-caption);
  font-weight: 400;
  color: var(--cuya-text);
  text-decoration: none;
  padding: 0 var(--cuya-space-2);
  transition: opacity 0.2s ease-out;
}

.cuya-nav__link:hover {
  opacity: 0.7;
  text-decoration: none;
}

/* ─── Animation ───────────────────────────────────────────────────────── */

@keyframes cuya-fade-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes cuya-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes cuya-pulse-soft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes cuya-glow-pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--cuya-pink-glow); }
  50% { box-shadow: 0 0 20px 4px var(--cuya-pink-glow); }
}

@keyframes cuya-slide-right {
  from {
    opacity: 0;
    transform: translateX(-16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes cuya-count-up {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes cuya-flow {
  0% { opacity: 0.3; }
  50% { opacity: 1; }
  100% { opacity: 0.3; }
}

.cuya-animate-in {
  animation: cuya-fade-up 0.6s var(--cuya-ease) both;
}

.cuya-animate-in--delay-1 { animation-delay: 0.1s; }
.cuya-animate-in--delay-2 { animation-delay: 0.2s; }
.cuya-animate-in--delay-3 { animation-delay: 0.3s; }
.cuya-animate-in--delay-4 { animation-delay: 0.4s; }

.cuya-animate-fade {
  animation: cuya-fade-in 0.5s var(--cuya-ease) both;
}

/* Scroll-triggered reveal (add via IntersectionObserver) */
.cuya-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--cuya-ease), transform 0.6s var(--cuya-ease);
}

.cuya-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Utility ─────────────────────────────────────────────────────────── */

.cuya-container {
  max-width: var(--cuya-max-width);
  margin: 0 auto;
  padding: 0 var(--cuya-space-6);
}

.cuya-container--wide {
  max-width: var(--cuya-max-width-wide);
}

.cuya-section {
  padding: var(--cuya-space-32) 0;
}

.cuya-text-muted { color: var(--cuya-text-muted); }
.cuya-text-center { text-align: center; }
.cuya-hidden { display: none !important; }