/* ============================================================
   Kinetics — base.css
   Design tokens, reset, layout primitives, typography
   ============================================================ */

@font-face {
  font-family: "IRANYekanX";
  src: url("IRANYekanXVF.ttf") format("truetype-variations");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  /* Surfaces - Clean white components on light neutral canvas (#f7f7f8) */
  --graphite: #f7f7f8; /* page & canvas background */
  --graphite-2: #ffffff; /* inner main component background */
  --card: #f7f7f8; /* outer card stage */
  --card-2: #ffffff; /* main components, inputs, buttons, sliders */
  --line: #e4e4e7; /* hairline border */

  /* Ink - high contrast dark text */
  --bone: #18181b; /* primary text */
  --bone-dim: #71717a; /* secondary text */
  --bone-faint: #a1a1aa; /* tertiary text */

  /* Signal */
  --amber: #ff0051; /* primary accent */
  --amber-deep: #b30039; /* accent shadow */
  --wire: #5b8def; /* secondary / code accent */
  --danger: #ff5c5c; /* error */
  --ok: #4cd08a; /* success */

  /* Type */
  --font-display: "IRANYekanX", system-ui, sans-serif;
  --font-body: "IRANYekanX", system-ui, sans-serif;
  --font-mono: "IRANYekanX", system-ui, sans-serif;

  /* Metrics */
  --wrap: 1180px;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow-subtle: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);

  /* Motion */
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --glide: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Subtle modern elevation for main demo components */
.demo-spring-card,
.demo-drag-card,
.demo-swipe-item,
.demo-peel-card,
.demo-tilt-card,
.demo-spotlight-zone,
.demo-trail-zone,
.demo-caustics,
.demo-warp-grid {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02) !important;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--graphite);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
input {
  font-family: inherit;
}

::selection {
  background: var(--amber);
  color: var(--graphite);
}

.mono {
  font-family: var(--font-mono);
  font-feature-settings: "ss01";
}
.dim {
  color: var(--bone-dim);
}
.hidden {
  display: none !important;
}

/* ---- Layout ---- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 28px;
}

.section {
  padding-block: clamp(56px, 8vw, 104px);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 28px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
}
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 30px);
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.section-head .count {
  color: var(--bone-faint);
  font-size: 13px;
  letter-spacing: 0.05em;
}

/* ---- Typography helpers ---- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
  text-transform: uppercase;
}
.h-display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 7vw, 74px);
  line-height: 0.96;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}
.h-display .accent {
  color: var(--amber);
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--graphite) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.brand .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--amber) 22%, transparent);
  animation: pulse-dot 2.4s var(--glide) infinite;
}
@keyframes pulse-dot {
  0%,
  100% {
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--amber) 24%, transparent);
  }
  50% {
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--amber) 8%, transparent);
  }
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}
.nav-links a {
  color: var(--bone-dim);
  transition: color 0.2s ease;
  padding: 12px 6px;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
}
.nav-links a:hover {
  color: var(--bone);
}

/* ---- Header dropdown (Colorion network) ---- */
.nav-dropdown {
  position: relative;
}
.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--bone-dim);
  font-size: 14px;
  font-family: var(--font-body);
  padding: 12px 6px;
  min-height: 48px;
  transition: color 0.2s ease;
}
.nav-dropdown-trigger:hover {
  color: var(--bone);
}
.nav-dropdown-trigger .caret {
  font-size: 15px;
  transition: transform 0.3s var(--spring);
}
.nav-dropdown.open .nav-dropdown-trigger .caret {
  transform: rotate(180deg);
}
.nav-dropdown.open .nav-dropdown-trigger {
  color: var(--bone);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 14px);
  right: 0;
  min-width: 220px;
  padding: 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  box-shadow: 0 16px 40px -12px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.98);
  transform-origin: top right;
  transition:
    opacity 0.22s var(--glide),
    transform 0.3s var(--spring),
    visibility 0.22s;
  z-index: 60;
}
.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}
.nav-dropdown-menu a {
  padding: 9px 12px;
  border-radius: 7px;
  font-size: 13px;
  color: var(--bone-dim);
  transition:
    background 0.15s ease,
    color 0.15s ease;
}
.nav-dropdown-menu a:hover {
  background: var(--card-2);
  color: var(--bone);
}

.btn-ghost {
  font-size: 13px;
  color: var(--bone-dim);
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 100px;
  transition:
    border-color 0.2s ease,
    color 0.2s ease;
}
.btn-ghost:hover {
  color: var(--bone);
  border-color: var(--bone-faint);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--bone);
  background: var(--card);
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    transform 0.2s ease;
}
.nav-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition:
    transform 0.25s var(--spring),
    opacity 0.2s ease;
}
.site-header.menu-open .nav-toggle {
  background: var(--card-2);
  border-color: var(--bone-faint);
}
.site-header.menu-open .nav-toggle span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.site-header.menu-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}
.site-header.menu-open .nav-toggle span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-nav {
  display: none;
}

/* ---- Buttons ---- */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 13px 22px;
  border-radius: 100px;
  transition:
    transform 0.3s var(--spring),
    background 0.2s ease,
    border-color 0.2s ease;
}
.btn-primary {
  background: var(--amber);
  color: var(--graphite);
  box-shadow: 0 10px 30px -12px
    color-mix(in srgb, var(--amber) 70%, transparent);
}
.btn-primary:hover {
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: translateY(0) scale(0.98);
}
.btn-secondary {
  background: var(--card);
  color: var(--bone);
  border: 1px solid var(--line);
  font-size: 14px;
}
.btn-secondary:hover {
  border-color: var(--bone-faint);
  transform: translateY(-2px);
}
.btn-secondary:active {
  transform: translateY(0) scale(0.98);
}

@media (max-width: 720px) {
  .site-header .wrap {
    height: auto;
    min-height: 60px;
    padding-block: 8px;
    justify-content: flex-start;
    gap: 10px;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .nav-links {
    display: none;
  }
  .nav-actions {
    display: flex;
    align-items: center;
    margin-left: auto;
    margin-right: 10px;
  }
  .nav-actions .btn-ghost {
    padding: 7px 12px;
    font-size: 12px;
  }
  .nav-toggle {
    flex: 0 0 auto;
  }
  .mobile-nav {
    display: block;
    position: absolute;
    left: 28px;
    right: 28px;
    top: calc(100% + 12px);
    padding: 12px;
    background: var(--graphite-2);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 18px 48px -20px rgba(0, 0, 0, 0.65);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.98);
    transform-origin: top right;
    transition:
      opacity 0.22s var(--glide),
      transform 0.28s var(--spring),
      visibility 0.22s;
    z-index: 60;
  }
  .site-header.menu-open .mobile-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
  }
  .mobile-nav .nav-links {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .mobile-nav .nav-links > a {
    width: 100%;
    justify-content: space-between;
    padding-inline: 12px;
    border-radius: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}