/* =============================================================
   1. Tokens
   ============================================================= */
@property --mx { syntax: "<percentage>"; inherits: false; initial-value: 50%; }
@property --my { syntax: "<percentage>"; inherits: false; initial-value: 50%; }

:root {
  --bg:        #0a0a0a;
  --bg-2:      #131313;
  --bg-card:   #1c1c1c;
  --ink:       #f5f5f5;
  --ink-mute:  #a3a3a3;
  --ink-dim:   rgba(245,245,245,0.55);
  --accent:    #ffffff;
  --accent-2:  #9a9a9a;
  --accent-3:  #4d4d4d;
  --gradient-1: #ffffff;
  --gradient-2: #8a8a8a;
  --gradient-3: #333333;
  --line:      rgba(245,245,245,0.14);

  --display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Courier New", monospace;

  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:   cubic-bezier(0.7, 0, 0.84, 0);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  --container: 1180px;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1; letter-spacing: -0.01em; font-family: var(--display); font-weight: 800; }
ul { list-style: none; padding: 0; }
::selection { background: var(--accent-2); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: var(--container); margin-inline: auto; padding-inline: 1.25rem; }
@media (min-width: 720px) { .container { padding-inline: 2rem; } }

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--ink); color: var(--bg);
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

.kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section { padding-block: clamp(4rem, 9vw, 8rem); position: relative; }
.section-title { font-size: clamp(2rem, 4.2vw, 3.2rem); margin-bottom: 1.25rem; }
.section-lede { color: var(--ink-mute); max-width: 52ch; font-size: 1.05rem; }

[data-reveal] {
  opacity: 0; transform: translateY(36px);
  transition: opacity .8s var(--ease-soft), transform .8s var(--ease-soft);
}
[data-reveal].is-revealed { opacity: 1; transform: none; }

/* =============================================================
   4. Components
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.9rem 1.7rem;
  font-weight: 600; font-size: 0.95rem;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
  transition: transform .45s var(--ease-soft), box-shadow .45s var(--ease-soft), background .3s;
}
.btn-primary {
  background: linear-gradient(120deg, var(--accent), #d4d4d4);
  color: #121212;
}
.btn-primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 50px rgba(255,255,255,0.18), 0 10px 22px rgba(0,0,0,0.45);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 22px 50px rgba(0,0,0,0.3); }
.btn:active { transform: translateY(-1px); transition-duration: .12s; }
.btn-sm { padding: 0.6rem 1.2rem; font-size: 0.85rem; }

.has-magnetic { display: inline-flex; position: relative; isolation: isolate; }
.magnetic-inner {
  display: inline-flex; align-items: center; justify-content: center; gap: inherit;
  will-change: transform;
  transition: transform .8s var(--ease-soft);
}

.cursor {
  position: fixed; top: 0; left: 0;
  pointer-events: none; z-index: 9999;
  display: none;
  mix-blend-mode: difference;
  opacity: 0;
  transition: opacity .25s var(--ease-out);
}
.cursor.is-ready { opacity: 1; }
@media (hover: hover) and (pointer: fine) { .cursor { display: block; } }
.cursor-dot, .cursor-ring {
  position: fixed; top: 0; left: 0; pointer-events: none; will-change: transform;
}
.cursor-dot { width: 5px; height: 5px; margin: -2.5px; background: var(--ink); border-radius: 50%; }
.cursor-ring {
  width: 32px; height: 32px; margin: -16px; border: 1px solid var(--ink); border-radius: 50%;
  transition: width .35s var(--ease-out), height .35s var(--ease-out), margin .35s var(--ease-out);
}
.cursor.is-interactive .cursor-ring { width: 52px; height: 52px; margin: -26px; }
.has-cursor, .has-cursor a, .has-cursor button { cursor: none; }

.has-tilt {
  --rx: 0deg; --ry: 0deg;
  transform: perspective(1000px) rotateX(var(--rx)) rotateY(var(--ry));
  transform-style: preserve-3d;
  transition: transform .55s var(--ease-soft);
}
.has-tilt:hover { transition-duration: .15s; }

/* =============================================================
   5. Nav
   ============================================================= */
.nav {
  position: fixed; top: 0; inset-inline: 0; z-index: 100;
  transition: background-color .4s var(--ease-out), backdrop-filter .4s var(--ease-out), box-shadow .4s var(--ease-out), padding .3s;
  padding-block: 1.4rem;
}
.nav.is-scrolled {
  background: rgba(10,9,8,0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
  padding-block: 0.9rem;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.nav-brand {
  font-family: var(--display); font-weight: 800; font-size: 1.3rem; letter-spacing: 0.02em;
}
.nav-brand span { color: var(--accent); }
.nav-links { display: none; gap: 2rem; }
@media (min-width: 960px) { .nav-links { display: flex; } }
.nav-link { position: relative; padding: 0.25rem 0; font-size: 0.92rem; color: var(--ink-mute); }
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -3px;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: right;
  transition: transform .45s var(--ease-soft);
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-inner > .btn { display: none; }
@media (min-width: 960px) { .nav-inner > .btn { display: inline-flex; } }

.nav-burger {
  display: flex; flex-direction: column; gap: 5px; padding: 0.5rem;
}
@media (min-width: 960px) { .nav-burger { display: none; } }
.nav-burger span { width: 22px; height: 2px; background: var(--ink); transition: transform .3s, opacity .3s; }
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  position: fixed; inset: 0; z-index: 90;
  background: var(--bg); color: var(--ink);
  display: grid; place-items: center; gap: 1.5rem;
  clip-path: inset(0 0 100% 0);
  transition: clip-path .65s var(--ease-soft);
}
.nav-mobile[aria-hidden="false"] { clip-path: inset(0); }
.nav-mobile a { font-family: var(--display); font-size: 1.6rem; font-weight: 700; }

/* =============================================================
   6. Hero
   ============================================================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: center;
  padding-block: clamp(6rem, 12vw, 9rem) 4rem;
  overflow: clip;
}
.hero-gradient {
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(circle 620px at var(--mx, 30%) var(--my, 35%), var(--gradient-1) 0%, transparent 55%),
    radial-gradient(circle 780px at calc(var(--mx, 30%) + 22%) calc(var(--my, 35%) - 14%), var(--gradient-2) 0%, transparent 55%),
    radial-gradient(circle 700px at calc(var(--mx, 30%) - 18%) calc(var(--my, 35%) + 20%), var(--gradient-3) 0%, transparent 55%),
    var(--bg);
  filter: blur(70px) saturate(140%);
  opacity: 0.55;
}
.hero-gradient-soft { opacity: 0.28; }
.hero-dots {
  position: absolute; inset: 0; z-index: -1;
  background-image: radial-gradient(rgba(247,243,236,0.08) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(ellipse 70% 60% at 30% 40%, black, transparent);
}
.hero-grid {
  display: grid; gap: 3rem;
  align-items: center;
}
@media (min-width: 960px) { .hero-grid { grid-template-columns: 1.1fr 0.9fr; gap: 4rem; } }

.hero-title { font-size: clamp(2.8rem, 8vw, 5.6rem); line-height: 0.92; }
.hero-title span { display: block; }
.hero-title .is-accent { color: var(--accent); }
.hero-sub { margin-top: 1.6rem; max-width: 46ch; color: var(--ink-mute); font-size: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.2rem; }

.hero-book { display: flex; justify-content: center; }

/* Book cover */
.book-cover {
  position: relative;
  width: min(300px, 78vw);
  isolation: isolate;
}
.book-cover img {
  width: 100%; display: block; border-radius: 10px;
  box-shadow:
    0 40px 90px -20px rgba(0,0,0,0.55),
    0 14px 30px -8px rgba(0,0,0,0.45),
    inset 0 0 0 1px rgba(0,0,0,0.06);
}
.book-cover-glow {
  position: absolute; left: 50%; bottom: -14%; z-index: -1;
  width: 140%; height: 55%;
  transform: translateX(-50%);
  background:
    radial-gradient(50% 60% at 30% 100%, rgba(255,255,255,0.4), transparent 70%),
    radial-gradient(50% 60% at 70% 100%, rgba(190,190,190,0.45), transparent 70%),
    radial-gradient(40% 50% at 50% 100%, rgba(90,90,90,0.4), transparent 70%);
  filter: blur(34px);
}
.book-cover-lg { width: min(340px, 82vw); }

/* =============================================================
   7. Stats
   ============================================================= */
.stats { padding-block: 3.5rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stats-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; text-align: center;
}
.stat-value {
  display: block; font-family: var(--display); font-weight: 800;
  font-size: clamp(2.2rem, 5vw, 3.4rem); color: var(--accent);
}
.stat-label { display: block; margin-top: 0.4rem; font-size: 0.82rem; color: var(--ink-mute); letter-spacing: 0.02em; }

/* =============================================================
   8. Book section
   ============================================================= */
.book-grid { display: grid; gap: 3rem; align-items: center; }
@media (min-width: 960px) { .book-grid { grid-template-columns: 0.85fr 1.15fr; gap: 5rem; } }
.book-visual { display: flex; justify-content: center; }

.area-list {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.7rem 1.5rem;
  margin-block: 1.8rem 2rem;
}
.area-list li {
  position: relative; padding-left: 1.3rem; color: var(--ink); font-size: 0.96rem;
}
.area-list li::before {
  content: ""; position: absolute; left: 0; top: 0.5em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2);
}
.book-formats { color: var(--ink-mute); font-size: 0.88rem; margin-bottom: 1.6rem; }

/* =============================================================
   9. Author section
   ============================================================= */
.section-author { background: var(--bg-2); }
.author-head { margin-bottom: 3rem; max-width: 62ch; }
.author-grid { display: grid; gap: 3rem; }
@media (min-width: 960px) { .author-grid { grid-template-columns: 0.55fr 1.45fr; gap: 4.5rem; align-items: start; } }
.author-visual { display: flex; flex-direction: column; align-items: center; gap: 1.6rem; }
@media (min-width: 960px) { .author-visual { position: sticky; top: 7rem; } }
.author-photo {
  width: min(320px, 82vw); aspect-ratio: 4 / 5; border-radius: 20px;
  background: conic-gradient(from 0deg, var(--gradient-1), var(--gradient-2), var(--gradient-3), var(--gradient-1));
  padding: 4px;
  box-shadow: 0 40px 90px -20px rgba(0,0,0,0.6);
}
.author-photo img {
  width: 100%; height: 100%; border-radius: 17px;
  object-fit: cover; object-position: 50% 22%;
}
.author-credential { color: var(--accent); font-size: 0.9rem; margin-top: 0.6rem; max-width: 60ch; }

.author-vision {
  width: min(320px, 82vw);
  padding: 1.4rem 1.3rem;
  border-left: 2px solid var(--accent);
  background: rgba(255,255,255,0.03);
  border-radius: 0 12px 12px 0;
}
.author-vision .kicker { margin-bottom: 0.5rem; }
.author-vision p:last-child {
  font-family: var(--display); font-weight: 700; font-size: 1.15rem;
  line-height: 1.3; color: var(--ink);
}

.author-bio { max-width: 62ch; margin-bottom: 0; }

.author-detail { margin-top: 2.4rem; }
.author-detail h3 {
  font-family: var(--sans); font-weight: 700; font-size: 1rem;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink);
  margin-bottom: 1rem;
}
.author-detail ul { display: flex; flex-direction: column; gap: 0.65rem; max-width: 62ch; }
.author-detail li {
  position: relative; padding-left: 1.3rem;
  color: var(--ink-mute); font-size: 0.98rem; line-height: 1.55;
}
.author-detail li::before {
  content: ""; position: absolute; left: 0; top: 0.55em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2);
}
.author-services li strong { color: var(--ink); font-weight: 600; }
.author-services li em { color: var(--ink); font-style: italic; }

.author-closing {
  margin-top: 2.4rem; padding-top: 1.8rem; border-top: 1px solid var(--line);
  color: var(--ink-mute); font-size: 1.02rem; max-width: 60ch;
}

.author-gallery-kicker { margin-top: 4rem; margin-bottom: 1.2rem; }
.author-gallery {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.8rem;
}
@media (min-width: 720px) { .author-gallery { grid-template-columns: repeat(4, 1fr); gap: 1rem; } }
.author-gallery figure {
  margin: 0; aspect-ratio: 4 / 5; border-radius: 12px; overflow: hidden;
  isolation: isolate;
}
.author-gallery img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .8s var(--ease-soft), filter .55s;
}
.author-gallery figure:hover img { transform: scale(1.08); filter: saturate(1.1) brightness(1.05); }

.book-event { margin-top: 1.8rem; max-width: 280px; }
.book-event img { border-radius: 12px; box-shadow: 0 20px 40px -14px rgba(0,0,0,0.5); }
.book-event figcaption {
  margin-top: 0.6rem; font-family: var(--mono); font-size: 0.7rem;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-dim);
}

/* =============================================================
   10. Contact section
   ============================================================= */
.section-contact { position: relative; overflow: clip; }
.contact-grid { display: grid; gap: 3rem; position: relative; z-index: 1; }
@media (min-width: 960px) { .contact-grid { grid-template-columns: 0.9fr 1.1fr; gap: 4rem; } }
.contact-email {
  display: inline-block; margin-top: 1.4rem; font-family: var(--display); font-weight: 700;
  font-size: clamp(1.3rem, 2.6vw, 1.8rem); color: var(--accent);
  position: relative; padding-bottom: 0.2rem; border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.contact-email:hover { border-color: var(--accent); }

.contact-socials { display: flex; flex-wrap: wrap; gap: 1.6rem; margin-top: 1.8rem; }
.contact-socials a {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.9rem; color: var(--ink-mute);
  position: relative; padding-bottom: 0.2rem;
}
.contact-socials a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px;
  height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: right;
  transition: transform .45s var(--ease-soft);
}
.contact-socials a:hover { color: var(--ink); }
.contact-socials a:hover::after { transform: scaleX(1); transform-origin: left; }
.contact-socials svg { width: 18px; height: 18px; fill: currentColor; }

.cta-form { position: relative; display: flex; flex-direction: column; gap: 1.2rem; transition: opacity .55s var(--ease-out), transform .55s var(--ease-soft); }
.cta-form.is-sent { opacity: 0; transform: translateY(-12px); pointer-events: none; }
.field { position: relative; }
.field input, .field textarea {
  width: 100%; padding: 1.3rem 1rem 0.55rem; border: 1px solid var(--line); border-radius: 10px;
  background: rgba(255,255,255,0.03); color: var(--ink); font-family: var(--sans); font-size: 1rem;
  transition: border-color .3s;
  resize: vertical;
}
.field input:focus, .field textarea:focus { border-color: var(--accent); outline: none; }
.field label {
  position: absolute; left: 1rem; top: 1.1rem;
  pointer-events: none; transition: all .25s var(--ease-out);
  color: var(--ink-dim); font-size: 0.95rem;
}
.field input:focus + label, .field input:not(:placeholder-shown) + label,
.field textarea:focus + label, .field textarea:not(:placeholder-shown) + label {
  top: 0.4rem; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent);
}
.cta-submit { position: relative; align-self: flex-start; }
.cta-form-spinner, .cta-form-check {
  position: absolute; inset: 0; display: grid; place-items: center;
  opacity: 0; pointer-events: none;
}
.cta-form.is-sending .cta-form-label { opacity: 0; }
.cta-form.is-sending .cta-form-spinner { opacity: 1; }
.cta-form-spinner::after {
  content: ""; width: 16px; height: 16px;
  border: 1.5px solid rgba(0,0,0,0.25); border-top-color: #141414;
  border-radius: 50%; animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.cta-form-check path {
  stroke: currentColor; stroke-width: 2; fill: none;
  stroke-dasharray: 1; stroke-dashoffset: 1;
  transition: stroke-dashoffset .55s var(--ease-out);
}
.cta-success {
  position: absolute; left: 0; top: 0; right: 0;
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: opacity .8s var(--ease-out) .2s, transform .9s var(--ease-soft) .2s;
}
.cta-success.is-visible { opacity: 1; pointer-events: auto; transform: none; }
.cta-success h3 { font-size: 1.6rem; margin-bottom: 0.5rem; }
.cta-success p { color: var(--ink-mute); }

/* =============================================================
   11. Footer
   ============================================================= */
.footer { padding-block: 2.4rem; border-top: 1px solid var(--line); }
.footer-inner { display: flex; flex-direction: column; gap: 0.8rem; align-items: center; text-align: center; }
@media (min-width: 720px) { .footer-inner { flex-direction: row; justify-content: space-between; text-align: left; } }
.footer-copy { color: var(--ink-dim); font-size: 0.82rem; }

/* =============================================================
   12. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .hero-gradient { animation: none; }
}