/* FStudio LLC — Design Tokens
   Premium dark, investor-facing, AI venture studio */

@import url("https://api.fontshare.com/v2/css?f[]=satoshi@300,400,500,700,900&f[]=jetbrains-mono@400,500&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@1,9..144,300;1,9..144,400;1,9..144,500&display=swap");

:root {
  /* ---------- Palette: graphite + cyan ---------- */
  --bg-0: #06080b;          /* page background, deepest */
  --bg-1: #0a0d12;          /* primary surface */
  --bg-2: #0f141b;          /* card surface */
  --bg-3: #141a23;          /* elevated card */
  --bg-4: #1c2330;          /* hover surface */

  --line-1: rgba(255, 255, 255, 0.06);   /* hairline borders */
  --line-2: rgba(255, 255, 255, 0.10);
  --line-3: rgba(255, 255, 255, 0.16);

  --fg-1: #f4f6f8;          /* primary text */
  --fg-2: #c9d1da;          /* secondary text */
  --fg-3: #8a96a4;          /* muted */
  --fg-4: #5b6573;          /* very muted, eyebrow */

  /* Accent — violet/plum */
  --accent: #a78bfa;
  --accent-deep: #7c3aed;
  --accent-bright: #c4b5fd;
  --accent-glow: rgba(167, 139, 250, 0.22);
  --accent-soft: rgba(167, 139, 250, 0.10);

  /* Semantic */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #f43f5e;

  /* ---------- Typography ---------- */
  --font-sans: "Satoshi", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;
  --font-serif: "Fraunces", "Source Serif Pro", Georgia, serif;

  /* Type scale (display → body) */
  --t-display-1: clamp(56px, 8vw, 120px);
  --t-display-2: clamp(44px, 6vw, 84px);
  --t-h1:        clamp(36px, 4.4vw, 64px);
  --t-h2:        clamp(28px, 3.2vw, 44px);
  --t-h3:        clamp(22px, 2vw, 28px);
  --t-h4:        18px;
  --t-body-lg:   18px;
  --t-body:      16px;
  --t-body-sm:   14px;
  --t-eyebrow:   12px;

  --lh-tight: 1.02;
  --lh-snug:  1.15;
  --lh-body:  1.55;
  --lh-loose: 1.7;

  --tr-tight: -0.03em;
  --tr-snug:  -0.02em;
  --tr-wide:  0.16em;

  /* ---------- Layout ---------- */
  --container: 1280px;
  --container-narrow: 1080px;
  --gutter: clamp(20px, 4vw, 56px);

  /* ---------- Radii ---------- */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-pill: 999px;

  /* ---------- Motion ---------- */
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-apple: cubic-bezier(0.4, 0, 0.2, 1);

  --dur-fast: 180ms;
  --dur-base: 320ms;
  --dur-slow: 600ms;
  --dur-slower: 1100ms;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  background: var(--bg-0);
}
body {
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: var(--lh-body);
  color: var(--fg-1);
  background: var(--bg-0);
  font-feature-settings: "ss01", "ss02", "cv11";
  font-variant-ligatures: common-ligatures;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--accent-glow); color: var(--fg-1); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Utilities ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  width: 100%;
}
.container--narrow {
  max-width: var(--container-narrow);
}
.eyebrow {
  font-size: var(--t-eyebrow);
  font-weight: 500;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--fg-3);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.eyebrow--plain::before { display: none; }

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 500;
  margin: 0;
  color: var(--fg-1);
  letter-spacing: var(--tr-tight);
  line-height: var(--lh-tight);
  text-wrap: balance;
}
h1 { font-size: var(--t-h1); font-weight: 500; }
h2 { font-size: var(--t-h2); font-weight: 500; }
h3 { font-size: var(--t-h3); font-weight: 500; letter-spacing: var(--tr-snug); }
h4 { font-size: var(--t-h4); font-weight: 500; letter-spacing: var(--tr-snug); }

p { margin: 0; color: var(--fg-2); }
.lead { font-size: var(--t-body-lg); color: var(--fg-2); line-height: 1.5; max-width: 56ch; text-wrap: pretty; }
.muted { color: var(--fg-3); }
.mono { font-family: var(--font-mono); font-feature-settings: "ss02"; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  background: transparent;
  color: var(--fg-1);
  transition: all var(--dur-fast) var(--ease-apple);
  white-space: nowrap;
  user-select: none;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn--primary {
  background: var(--fg-1);
  color: var(--bg-0);
}
.btn--primary:hover { background: #fff; transform: translateY(-1px); }
.btn--accent {
  background: var(--accent);
  color: #1a0f2e;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn--accent:hover {
  background: var(--accent-bright);
  box-shadow: 0 8px 32px -8px var(--accent-glow);
  transform: translateY(-1px);
}
.btn--ghost {
  border-color: var(--line-3);
  color: var(--fg-1);
}
.btn--ghost:hover {
  background: var(--bg-3);
  border-color: var(--line-3);
}
.btn--lg { padding: 15px 26px; font-size: 15px; }
.btn--sm { padding: 9px 16px; font-size: 13px; }

.btn .arrow {
  transition: transform var(--dur-base) var(--ease-apple);
}
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Card ---------- */
.card {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  border-radius: var(--r-lg);
  transition: border-color var(--dur-base) var(--ease-apple),
              transform var(--dur-base) var(--ease-apple),
              background var(--dur-base) var(--ease-apple);
}
.card:hover {
  border-color: var(--line-3);
  background: var(--bg-3);
}
.card--lift:hover { transform: translateY(-2px); }

/* ---------- Badge ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--line-2);
  background: var(--bg-3);
  color: var(--fg-2);
  font-family: var(--font-mono);
}
.badge--accent { color: var(--accent); border-color: rgba(167,139,250,0.25); background: var(--accent-soft); }
.badge--neutral { color: var(--fg-3); }

/* ---------- Section ---------- */
section {
  padding: clamp(80px, 11vw, 160px) 0;
  position: relative;
}
section.section--tight { padding: clamp(60px, 8vw, 110px) 0; }

/* Hairline divider */
.hairline {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-2), transparent);
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 900ms var(--ease-spring),
              transform 900ms var(--ease-spring);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1 !important;
  transform: translateY(0) !important;
}
/* Fallback: if JS / IntersectionObserver didn't run, force-reveal everything */
html.no-js .reveal,
html.reveal-fallback .reveal {
  opacity: 1 !important;
  transform: none !important;
}
.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }
.reveal-delay-5 { transition-delay: 400ms; }

/* ---------- Page transitions ---------- */
.page-enter {
  animation: pageEnter 700ms var(--ease-spring) both;
}
@keyframes pageEnter {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Form ---------- */
.field { display: flex; flex-direction: column; gap: 8px; }
.field label {
  font-size: 13px;
  color: var(--fg-2);
  font-weight: 500;
}
.field label .req { color: var(--accent); margin-left: 2px; }
.field input,
.field select,
.field textarea {
  background: var(--bg-1);
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  padding: 12px 14px;
  color: var(--fg-1);
  font-family: inherit;
  font-size: 15px;
  transition: border-color var(--dur-fast) var(--ease-apple),
              background var(--dur-fast) var(--ease-apple);
  width: 100%;
}
.field textarea { min-height: 120px; resize: vertical; line-height: 1.5; }
.field input::placeholder, .field textarea::placeholder { color: var(--fg-4); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-2);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field--error input,
.field--error select,
.field--error textarea {
  border-color: var(--danger);
}
.field-error {
  font-size: 12px;
  color: var(--danger);
  font-family: var(--font-mono);
}
.field-hint {
  font-size: 12px;
  color: var(--fg-4);
}

/* Checkbox */
.check {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  background: var(--bg-1);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-apple);
}
.check:hover { border-color: var(--line-3); }
.check input[type="checkbox"] {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--line-3);
  border-radius: 4px;
  background: var(--bg-2);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  margin-top: 2px;
  transition: all var(--dur-fast) var(--ease-apple);
}
.check input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}
.check input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid #1a0f2e;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.check span { font-size: 13px; color: var(--fg-2); line-height: 1.5; }

/* ---------- Logo wordmark ---------- */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--fg-1);
  font-size: 16px;
}
.logo__mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
}
.logo__name {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
  gap: 4px;
}
.logo__word {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--fg-1);
}
.logo__tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-4);
  font-weight: 500;
}

/* ---------- Number pad (process steps) ---------- */
.numpad {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.08em;
}

/* ---------- Grid line backdrop (subtle) ---------- */
.grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-1) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-1) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

/* ---------- Responsive helpers ---------- */
@media (max-width: 1000px) {
  .hide-sm { display: none !important; }
}
@media (min-width: 1001px) {
  .show-sm { display: none !important; }
}

/* ---------- Animated gradient outline (purple) ---------- */
@keyframes glowSlide {
  0%   { background-position:   0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position:   0% 50%; }
}
.glow-outline,
.btn {
  position: relative;
  isolation: isolate;
}
.glow-outline::before,
.btn::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: linear-gradient(110deg,
    #c4b5fd 0%,
    #8b5cf6 18%,
    #a855f7 35%,
    #6d28d9 50%,
    #a855f7 65%,
    #8b5cf6 82%,
    #c4b5fd 100%);
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask-composite: exclude;
  opacity: 0;
  transition: opacity 280ms var(--ease-apple);
  pointer-events: none;
  z-index: 5;
  filter: drop-shadow(0 0 8px rgba(139, 92, 246, 0.45));
}
.glow-outline:hover::before,
.btn:hover::before {
  opacity: 1;
  animation: glowSlide 2.4s ease-in-out infinite;
}
/* Buttons need overflow:visible for outline; also make sure label sits above */
.btn { overflow: visible; }
.btn > * { position: relative; z-index: 6; }
/* Cards/panels with overflow:hidden need an inset variant */
.split__panel.glow-outline,
.closing.glow-outline { overflow: visible; }

/* ---------- Premium upgrade ---------- */

/* Editorial italic serif accent */
.serif-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.015em;
  font-feature-settings: "ss01";
}

/* Slightly lighter weight on big titles for editorial feel */
h1 { font-weight: 400; }
h2 { font-weight: 400; }

/* Section number tag (№01 / №02) */
.section-num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-4);
  margin-bottom: 16px;
}
.section-num::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--fg-4);
}

/* Scroll progress bar (top, 1px violet) */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 1px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent), var(--accent-bright));
  z-index: 200;
  transition: width 80ms linear;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* Floating section indicator (right side) */
.scroll-numerator {
  position: fixed;
  right: clamp(14px, 2vw, 28px);
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--fg-4);
  text-transform: uppercase;
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 400ms var(--ease-apple);
}
.scroll-numerator.is-active { opacity: 1; }
.scroll-numerator__line {
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0.45;
  transition: opacity 280ms var(--ease-apple), color 280ms var(--ease-apple);
}
.scroll-numerator__line.is-current {
  opacity: 1;
  color: var(--accent);
}
.scroll-numerator__line .tick {
  width: 18px;
  height: 1px;
  background: currentColor;
  display: inline-block;
  transition: width 280ms var(--ease-apple);
}
.scroll-numerator__line.is-current .tick { width: 32px; }
@media (max-width: 1100px) { .scroll-numerator { display: none; } }

/* Custom cursor */
@media (hover: hover) and (pointer: fine) {
  html.has-custom-cursor, html.has-custom-cursor body { cursor: none; }
  html.has-custom-cursor a,
  html.has-custom-cursor button,
  html.has-custom-cursor input,
  html.has-custom-cursor textarea,
  html.has-custom-cursor select,
  html.has-custom-cursor [role="button"] { cursor: none; }
  .cursor-dot, .cursor-ring {
    position: fixed;
    top: 0; left: 0;
    pointer-events: none;
    z-index: 9999;
    will-change: transform;
    mix-blend-mode: difference;
  }
  .cursor-dot {
    width: 6px; height: 6px;
    background: #fff;
    border-radius: 999px;
    transform: translate(-50%, -50%);
    transition: transform 120ms var(--ease-apple);
  }
  .cursor-ring {
    width: 28px; height: 28px;
    border: 1px solid rgba(255,255,255,0.7);
    border-radius: 999px;
    transform: translate(-50%, -50%);
    transition: width 220ms var(--ease-apple),
                height 220ms var(--ease-apple),
                border-color 220ms var(--ease-apple),
                background 220ms var(--ease-apple);
  }
  html.cursor-active .cursor-ring {
    width: 44px;
    height: 44px;
    border-color: var(--accent);
    background: var(--accent-soft);
  }
  html.cursor-active .cursor-dot {
    transform: translate(-50%, -50%) scale(0.5);
  }
}
@media (hover: none) {
  .cursor-dot, .cursor-ring { display: none; }
}

/* Cmd+K palette */
.cmdk-overlay {
  position: fixed; inset: 0;
  background: rgba(6, 8, 11, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 300;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 14vh;
  opacity: 0;
  transition: opacity 220ms var(--ease-apple);
}
.cmdk-overlay.is-open { display: flex; opacity: 1; }
.cmdk {
  width: min(640px, calc(100vw - 32px));
  background: var(--bg-2);
  border: 1px solid var(--line-3);
  border-radius: var(--r-lg);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.6),
              0 0 0 1px var(--accent-soft);
  overflow: hidden;
  transform: translateY(-8px) scale(0.985);
  opacity: 0;
  transition: transform 360ms var(--ease-spring), opacity 220ms var(--ease-apple);
}
.cmdk-overlay.is-open .cmdk {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.cmdk__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-1);
}
.cmdk__head svg { color: var(--fg-3); flex-shrink: 0; }
.cmdk__input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--fg-1);
  font-family: inherit;
  font-size: 16px;
  padding: 4px 0;
}
.cmdk__input::placeholder { color: var(--fg-4); }
.cmdk__hint {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--fg-4);
  border: 1px solid var(--line-2);
  padding: 3px 7px;
  border-radius: 5px;
}
.cmdk__list {
  max-height: 60vh;
  overflow-y: auto;
  padding: 8px;
}
.cmdk__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--r-md);
  cursor: pointer;
  color: var(--fg-2);
  font-size: 14px;
  transition: background 120ms var(--ease-apple), color 120ms var(--ease-apple);
}
.cmdk__item .cmdk__num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-4);
  letter-spacing: 0.1em;
  width: 24px;
}
.cmdk__item .cmdk__title { flex: 1; color: var(--fg-1); }
.cmdk__item .cmdk__sub { color: var(--fg-3); font-size: 12px; font-family: var(--font-mono); letter-spacing: 0.05em; }
.cmdk__item.is-active,
.cmdk__item:hover {
  background: var(--bg-3);
  color: var(--fg-1);
}
.cmdk__group-title {
  padding: 12px 12px 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-4);
}
.cmdk__empty {
  padding: 20px;
  text-align: center;
  color: var(--fg-3);
  font-size: 14px;
}

/* Editorial section divider with number */
.section-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-4);
  padding: 4px var(--gutter);
  max-width: var(--container);
  margin: 0 auto;
}
.section-divider::before,
.section-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-1);
}