/*
 * KVA STUDIOS
 * Public Experience System V2
 *
 * P29-R3A Foundation
 *
 * This file establishes the canonical visual primitives for the
 * next KVA public experience. During the migration it remains isolated
 * until an individual surface explicitly adopts it.
 */

/* =========================================================
   01. TOKENS
   ========================================================= */

:root {
  /* Core surfaces */
  --kva-v2-ink: #0a0a0a;
  --kva-v2-ink-soft: #111111;
  --kva-v2-graphite: #181818;
  --kva-v2-graphite-soft: #222222;

  --kva-v2-paper: #f4f2ec;
  --kva-v2-paper-soft: #ebe8e0;
  --kva-v2-white: #ffffff;

  /* Text */
  --kva-v2-text-on-dark: #f5f5f2;
  --kva-v2-text-on-dark-muted: #aaa9a4;
  --kva-v2-text-on-light: #161616;
  --kva-v2-text-on-light-muted: #5f5d57;

  /* Lines */
  --kva-v2-line-dark: rgba(255, 255, 255, 0.13);
  --kva-v2-line-dark-strong: rgba(255, 255, 255, 0.22);
  --kva-v2-line-light: rgba(10, 10, 10, 0.14);
  --kva-v2-line-light-strong: rgba(10, 10, 10, 0.24);

  /* Controlled interaction accent */
  --kva-v2-accent: #d8ff45;
  --kva-v2-accent-ink: #111407;

  /* Layout */
  --kva-v2-page-max: 1440px;
  --kva-v2-content-max: 1180px;
  --kva-v2-reading-max: 760px;

  --kva-v2-gutter:
    clamp(20px, 4vw, 64px);

  --kva-v2-section-space:
    clamp(72px, 10vw, 152px);

  --kva-v2-section-space-compact:
    clamp(52px, 7vw, 104px);

  /* Spacing scale */
  --kva-v2-space-1: 4px;
  --kva-v2-space-2: 8px;
  --kva-v2-space-3: 12px;
  --kva-v2-space-4: 16px;
  --kva-v2-space-5: 24px;
  --kva-v2-space-6: 32px;
  --kva-v2-space-7: 48px;
  --kva-v2-space-8: 64px;
  --kva-v2-space-9: 96px;

  /* Radius */
  --kva-v2-radius-sm: 10px;
  --kva-v2-radius-md: 18px;
  --kva-v2-radius-lg: 28px;
  --kva-v2-radius-pill: 999px;

  /* Type */
  --kva-v2-font:
    Inter,
    ui-sans-serif,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  --kva-v2-display-xl:
    clamp(3.25rem, 8vw, 8rem);

  --kva-v2-display-lg:
    clamp(2.7rem, 6.4vw, 6rem);

  --kva-v2-display-md:
    clamp(2.15rem, 4.5vw, 4.25rem);

  --kva-v2-heading:
    clamp(1.75rem, 3vw, 3rem);

  --kva-v2-body-lg:
    clamp(1.0625rem, 1.4vw, 1.3rem);

  --kva-v2-body:
    clamp(1rem, 1vw, 1.125rem);

  --kva-v2-small:
    clamp(0.8125rem, 0.8vw, 0.9375rem);

  /* Motion */
  --kva-v2-ease:
    cubic-bezier(0.22, 1, 0.36, 1);

  --kva-v2-duration-fast: 180ms;
  --kva-v2-duration: 320ms;
  --kva-v2-duration-slow: 650ms;
}


/* =========================================================
   02. EXPERIENCE ROOT
   ========================================================= */

.kva-v2 {
  min-height: 100%;
  font-family: var(--kva-v2-font);
  background: var(--kva-v2-ink);
  color: var(--kva-v2-text-on-dark);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.kva-v2 *,
.kva-v2 *::before,
.kva-v2 *::after {
  box-sizing: border-box;
}

.kva-v2 img,
.kva-v2 svg {
  display: block;
  max-width: 100%;
}

.kva-v2 a {
  color: inherit;
}


/* =========================================================
   03. LAYOUT
   ========================================================= */

.kva-v2-shell {
  width: min(
    calc(100% - (var(--kva-v2-gutter) * 2)),
    var(--kva-v2-page-max)
  );
  margin-inline: auto;
}

.kva-v2-container {
  width: min(
    calc(100% - (var(--kva-v2-gutter) * 2)),
    var(--kva-v2-content-max)
  );
  margin-inline: auto;
}

.kva-v2-reading {
  width: min(100%, var(--kva-v2-reading-max));
}

.kva-v2-section {
  position: relative;
  padding-block: var(--kva-v2-section-space);
}

.kva-v2-section--compact {
  padding-block: var(--kva-v2-section-space-compact);
}

.kva-v2-grid {
  display: grid;
  gap: clamp(24px, 3vw, 48px);
}

.kva-v2-grid--2 {
  grid-template-columns:
    repeat(2, minmax(0, 1fr));
}

.kva-v2-grid--3 {
  grid-template-columns:
    repeat(3, minmax(0, 1fr));
}


/* =========================================================
   04. SURFACES
   ========================================================= */

.kva-v2-surface--ink {
  background: var(--kva-v2-ink);
  color: var(--kva-v2-text-on-dark);
}

.kva-v2-surface--graphite {
  background: var(--kva-v2-graphite);
  color: var(--kva-v2-text-on-dark);
}

.kva-v2-surface--paper {
  background: var(--kva-v2-paper);
  color: var(--kva-v2-text-on-light);
}

.kva-v2-surface--white {
  background: var(--kva-v2-white);
  color: var(--kva-v2-text-on-light);
}


/* =========================================================
   05. TYPOGRAPHY
   ========================================================= */

.kva-v2-display-xl,
.kva-v2-display-lg,
.kva-v2-display-md,
.kva-v2-heading {
  margin: 0;
  font-weight: 520;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.kva-v2-display-xl {
  font-size: var(--kva-v2-display-xl);
  line-height: 0.91;
}

.kva-v2-display-lg {
  font-size: var(--kva-v2-display-lg);
  line-height: 0.94;
}

.kva-v2-display-md {
  font-size: var(--kva-v2-display-md);
  line-height: 0.98;
}

.kva-v2-heading {
  font-size: var(--kva-v2-heading);
  line-height: 1.04;
}

.kva-v2-body-lg,
.kva-v2-body {
  margin: 0;
  text-wrap: pretty;
}

.kva-v2-body-lg {
  max-width: 64ch;
  font-size: var(--kva-v2-body-lg);
  line-height: 1.58;
}

.kva-v2-body {
  max-width: 68ch;
  font-size: var(--kva-v2-body);
  line-height: 1.65;
}

.kva-v2-muted {
  color: var(--kva-v2-text-on-dark-muted);
}

.kva-v2-surface--paper .kva-v2-muted,
.kva-v2-surface--white .kva-v2-muted {
  color: var(--kva-v2-text-on-light-muted);
}

.kva-v2-eyebrow {
  margin: 0;
  font-size: var(--kva-v2-small);
  line-height: 1.2;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}


/* =========================================================
   06. ACTIONS
   ========================================================= */

.kva-v2-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.kva-v2-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  padding: 12px 18px;

  border: 1px solid var(--kva-v2-line-dark-strong);
  border-radius: var(--kva-v2-radius-pill);

  background: transparent;
  color: inherit;

  font: inherit;
  font-size: 0.9375rem;
  font-weight: 620;
  line-height: 1;

  text-decoration: none;
  cursor: pointer;

  transition:
    transform var(--kva-v2-duration-fast) var(--kva-v2-ease),
    background-color var(--kva-v2-duration-fast) var(--kva-v2-ease),
    color var(--kva-v2-duration-fast) var(--kva-v2-ease),
    border-color var(--kva-v2-duration-fast) var(--kva-v2-ease);
}

.kva-v2-button:hover {
  transform: translateY(-2px);
}

.kva-v2-button--primary {
  border-color: var(--kva-v2-text-on-dark);
  background: var(--kva-v2-text-on-dark);
  color: var(--kva-v2-ink);
}

.kva-v2-button--accent {
  border-color: var(--kva-v2-accent);
  background: var(--kva-v2-accent);
  color: var(--kva-v2-accent-ink);
}

.kva-v2-surface--paper .kva-v2-button,
.kva-v2-surface--white .kva-v2-button {
  border-color: var(--kva-v2-line-light-strong);
}

.kva-v2-surface--paper .kva-v2-button--primary,
.kva-v2-surface--white .kva-v2-button--primary {
  border-color: var(--kva-v2-ink);
  background: var(--kva-v2-ink);
  color: var(--kva-v2-white);
}


/* =========================================================
   07. CARDS
   ========================================================= */

.kva-v2-card {
  position: relative;
  min-width: 0;

  padding: clamp(22px, 3vw, 36px);

  border: 1px solid var(--kva-v2-line-dark);
  border-radius: var(--kva-v2-radius-md);

  background: rgba(255, 255, 255, 0.035);
}

.kva-v2-surface--paper .kva-v2-card,
.kva-v2-surface--white .kva-v2-card {
  border-color: var(--kva-v2-line-light);
  background: rgba(255, 255, 255, 0.46);
}


/* =========================================================
   08. TECHNICAL / PRODUCT SURFACE
   ========================================================= */

.kva-v2-product-frame {
  position: relative;
  overflow: hidden;

  border: 1px solid var(--kva-v2-line-dark);
  border-radius: var(--kva-v2-radius-lg);

  background:
    linear-gradient(
      145deg,
      #1d1d1d 0%,
      #101010 55%,
      #090909 100%
    );
}

.kva-v2-product-frame::before {
  content: "";
  position: absolute;
  inset: 0;

  pointer-events: none;

  background-image:
    linear-gradient(
      rgba(255, 255, 255, 0.025) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.025) 1px,
      transparent 1px
    );

  background-size: 32px 32px;

  mask-image:
    linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.85),
      transparent 85%
    );
}


/* =========================================================
   09. DIVIDERS
   ========================================================= */

.kva-v2-rule {
  width: 100%;
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--kva-v2-line-dark);
}

.kva-v2-surface--paper .kva-v2-rule,
.kva-v2-surface--white .kva-v2-rule {
  background: var(--kva-v2-line-light);
}


/* =========================================================
   10. ACCESSIBILITY
   ========================================================= */

.kva-v2 :focus-visible {
  outline: 2px solid var(--kva-v2-accent);
  outline-offset: 4px;
}

.kva-v2 [id] {
  scroll-margin-top: 96px;
}


/* =========================================================
   11. RESPONSIVE FOUNDATION
   ========================================================= */

@media (max-width: 900px) {
  .kva-v2-grid--3 {
    grid-template-columns:
      repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  :root {
    --kva-v2-gutter: 20px;

    --kva-v2-section-space:
      clamp(58px, 15vw, 84px);

    --kva-v2-section-space-compact:
      clamp(44px, 11vw, 64px);
  }

  .kva-v2-grid--2,
  .kva-v2-grid--3 {
    grid-template-columns: 1fr;
  }

  .kva-v2-actions {
    align-items: stretch;
  }

  .kva-v2-button {
    min-height: 50px;
  }
}

@media (max-width: 420px) {
  :root {
    --kva-v2-gutter: 18px;
  }

  .kva-v2-actions {
    flex-direction: column;
  }

  .kva-v2-button {
    width: 100%;
  }
}


/* =========================================================
   12. REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
  .kva-v2 *,
  .kva-v2 *::before,
  .kva-v2 *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}