/* ===========================================================
   THE SOLVE FRAMEWORK — Design Tokens (derived from book covers)
   Navy:   #05162D / #0A1A30  — HSL 215 70% 10%
   Orange: #F1830D            — HSL 32 94% 49%
   =========================================================== */

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

:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);
  --text-hero: clamp(2.75rem, 0.5rem + 6vw, 6.5rem);

  /* Spacing (4px base) */
  --space-1: .25rem; --space-2: .5rem; --space-3: .75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;

  /* Colors — light mode (default: this brand is navy-forward, so "light" here means the paper/cream reading mode) */
  --color-bg: #FBF9F5;
  --color-surface: #FFFFFF;
  --color-surface-2: #F3EFE8;
  --color-surface-3: #E9E4DA;
  --color-border-strong: #C9C2B4;
  --color-text-strong-muted: #3A4250;
  --color-border: #E4DFD5;
  --color-text: #0A1A30;
  --color-text-muted: #4B5768;
  --color-text-faint: #8A93A0;
  --color-text-inverse: #FBF9F5;

  --color-navy: #0A1A30;
  --color-navy-deep: #05162D;
  --color-navy-light: #182436;

  --color-primary: #E06D00;
  --color-primary-hover: #C55F00;
  --color-primary-active: #A64F00;
  --color-primary-highlight: #FBE3C6;

  --radius-sm: .375rem; --radius-md: .5rem; --radius-lg: .875rem; --radius-xl: 1.25rem; --radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(5,22,45,.06);
  --shadow-md: 0 8px 24px rgba(5,22,45,.10);
  --shadow-lg: 0 20px 50px rgba(5,22,45,.16);

  --transition: 220ms cubic-bezier(.16,1,.3,1);

  --font-display: 'Clash Grotesk', 'Satoshi', 'Segoe UI', sans-serif;
  --font-body: 'Satoshi', 'Segoe UI', sans-serif;
  --font-accent: 'Source Serif 4', Georgia, serif;

  --content-wide: 1240px;
  --content-default: 960px;
  --content-narrow: 680px;
}

/* Dark surfaces are used deliberately for hero/platform/cta bands — not a toggle, this is brand-driven */
html { -webkit-text-size-adjust: none; text-size-adjust: none; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }
h1, h2, h3 { text-wrap: balance; line-height: 1.1; font-family: var(--font-display); }
p { text-wrap: pretty; }

::selection { background: var(--color-primary-highlight); color: var(--color-navy); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--color-primary); color: #fff;
  padding: var(--space-3) var(--space-5); z-index: 200; border-radius: var(--radius-sm);
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

.wrap { max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }

/* ============== BUTTONS ============== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-family: var(--font-body); font-weight: 600; font-size: var(--text-sm);
  padding: var(--space-3) var(--space-6); border-radius: var(--radius-full);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 6px 18px rgba(224,109,0,.28); }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: 0 10px 24px rgba(224,109,0,.34); }
.btn-outline { border: 1.5px solid var(--color-navy); color: var(--color-navy); }
.btn-outline:hover { background: var(--color-navy); color: #fff; }
.btn-outline-invert { border: 1.5px solid rgba(255,255,255,.5); color: #fff; }
.btn-outline-invert:hover { background: #fff; color: var(--color-navy); border-color: #fff; }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }
.btn-sm { padding: var(--space-2) var(--space-5); font-size: var(--text-xs); }

/* ============== HEADER ============== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(251,249,245,.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header-inner { display: flex; align-items: center; gap: var(--space-8); padding-block: var(--space-4); }
.logo { display: flex; align-items: center; gap: var(--space-2); font-family: var(--font-display); font-weight: 600; font-size: var(--text-base); color: var(--color-navy); margin-right: auto; }
.logo-dot { color: var(--color-primary); }
.main-nav { display: flex; gap: var(--space-8); }
.main-nav a { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); transition: color var(--transition); }
.main-nav a:hover { color: var(--color-navy); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: var(--space-2); }
.nav-toggle span { width: 22px; height: 2px; background: var(--color-navy); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }

@media (max-width: 860px) {
  .main-nav { position: fixed; inset: 64px var(--space-6) auto var(--space-6); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); flex-direction: column; padding: var(--space-4); gap: var(--space-1); box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transform: translateY(-8px); transition: opacity var(--transition), transform var(--transition); }
  .main-nav.open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .main-nav a { padding: var(--space-3) var(--space-3); border-radius: var(--radius-sm); }
  .main-nav a:hover { background: var(--color-surface-2); }
  .nav-toggle { display: flex; }
  .header-inner .btn-sm { display: none; }
}

/* ============== HERO ============== */
.hero { position: relative; background: var(--color-navy-deep); color: #fff; overflow: hidden; padding-block: clamp(var(--space-24), 14vw, 9rem) clamp(var(--space-20), 10vw, 7rem); }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .9; }
.hero-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(5,22,45,.35) 0%, rgba(5,22,45,.55) 60%, var(--color-navy-deep) 100%); }
.hero-inner { position: relative; z-index: 1; max-width: 760px; }
.eyebrow { font-size: var(--text-xs); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--color-primary); margin-bottom: var(--space-4); }
.eyebrow.center { text-align: center; }
.hero-title { font-size: var(--text-hero); font-weight: 600; letter-spacing: -.02em; margin-bottom: var(--space-6); }
.hero-title em { font-style: normal; color: var(--color-primary); }
.accent-dot { color: var(--color-primary); }
.hero-sub { font-size: var(--text-lg); color: rgba(255,255,255,.82); max-width: 620px; margin-bottom: var(--space-8); }
.hero-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-10); }
.hero-tagline { font-family: var(--font-accent); font-style: italic; font-size: var(--text-base); color: rgba(255,255,255,.65); }

/* ============== PROOF STRIP ============== */
.proof-strip { background: var(--color-navy); color: #fff; }
.proof-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); padding-block: var(--space-8); }
.proof-item { text-align: center; display: flex; flex-direction: column; gap: var(--space-1); }
.proof-num { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: var(--color-primary); }
.proof-label { font-size: var(--text-xs); color: rgba(255,255,255,.65); text-transform: uppercase; letter-spacing: .05em; }
@media (max-width: 700px) { .proof-inner { grid-template-columns: repeat(2, 1fr); } }

/* ============== SECTIONS ============== */
.section { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); }
.section-title { font-size: var(--text-2xl); font-weight: 600; letter-spacing: -.01em; margin-bottom: var(--space-4); color: var(--color-navy); }
.section-title.center { text-align: center; }
.section-sub { font-size: var(--text-base); color: var(--color-text-muted); max-width: 640px; }
.section-sub.center { margin-inline: auto; text-align: center; }
.center { text-align: center; }

/* ============== BOOKS ============== */
.book-grid { margin-top: var(--space-16); display: flex; flex-direction: column; gap: var(--space-24); }
.book-card { display: grid; grid-template-columns: 320px 1fr; gap: var(--space-12); align-items: center; }
.book-card.reverse { grid-template-columns: 1fr 320px; }
.book-card.reverse .book-cover-wrap { order: 2; }
.book-cover-wrap { position: relative; perspective: 1600px; }

/* 3D book mockup: tilt the cover, add a page block on the right edge and a spine-shadow gradient on the left so the flat cover art reads as a photographed hardcover book. */
.book-cover-3d {
  position: relative;
  transform-style: preserve-3d;
  transform: rotateY(-22deg) rotateX(2deg);
  transition: transform var(--transition);
  filter: drop-shadow(24px 30px 34px rgba(5,22,45,.35));
}
.book-cover-wrap:hover .book-cover-3d { transform: rotateY(-14deg) rotateX(1deg); }
.book-card.reverse .book-cover-3d {
  transform: rotateY(22deg) rotateX(2deg);
  filter: drop-shadow(-24px 30px 34px rgba(5,22,45,.35));
}
.book-card.reverse .book-cover-wrap:hover .book-cover-3d { transform: rotateY(14deg) rotateX(1deg); }
.book-card.reverse .book-cover-3d::before {
  background: linear-gradient(270deg,
    rgba(0,0,0,.55) 0%,
    rgba(0,0,0,.28) 2.5%,
    rgba(255,255,255,.10) 4%,
    rgba(0,0,0,0) 9%,
    rgba(0,0,0,0) 92%,
    rgba(0,0,0,.12) 100%);
}
.book-card.reverse .book-cover-3d::after {
  right: auto;
  left: -14px;
  border-radius: 4px 0 0 4px;
  transform: rotateY(-90deg);
  transform-origin: right center;
  box-shadow: inset 2px 0 4px rgba(0,0,0,.15);
}
.book-cover {
  position: relative;
  display: block;
  border-radius: 3px 6px 6px 3px;
  width: 100%;
  z-index: 2;
}
/* left edge spine shading, sits on top of the cover art */
.book-cover-3d::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 3px 6px 6px 3px;
  background: linear-gradient(90deg,
    rgba(0,0,0,.55) 0%,
    rgba(0,0,0,.28) 2.5%,
    rgba(255,255,255,.10) 4%,
    rgba(0,0,0,0) 9%,
    rgba(0,0,0,0) 92%,
    rgba(0,0,0,.12) 100%);
  z-index: 3;
  pointer-events: none;
}
/* page block: thin strip of "paper" visible along the right edge, rotated back to sit behind the cover like real page edges */
.book-cover-3d::after {
  content: "";
  position: absolute;
  top: 3px;
  bottom: 3px;
  right: -14px;
  width: 14px;
  background: repeating-linear-gradient(
    to bottom,
    #ece6d8 0px, #ece6d8 1px,
    #d9d2c0 1px, #d9d2c0 2px
  );
  border-radius: 0 4px 4px 0;
  transform: rotateY(90deg);
  transform-origin: left center;
  box-shadow: inset -2px 0 4px rgba(0,0,0,.15);
  z-index: 1;
}
.book-kicker { font-size: var(--text-xs); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--color-primary); margin-bottom: var(--space-3); }
.book-title { font-size: var(--text-xl); margin-bottom: var(--space-4); color: var(--color-navy); }
.book-desc { color: var(--color-text-muted); margin-bottom: var(--space-5); max-width: 60ch; }
.book-points { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-6); }
.book-points li { position: relative; padding-left: var(--space-6); font-size: var(--text-sm); color: var(--color-text); }
.book-points li::before { content: ""; position: absolute; left: 0; top: .55em; width: 7px; height: 7px; border-radius: 50%; background: var(--color-primary); }
.cents-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-3); margin-bottom: var(--space-6); }
.cents-grid li { text-align: center; background: var(--color-surface-3); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); padding: var(--space-3) var(--space-2); font-size: var(--text-xs); color: var(--color-text-strong-muted); }
.cents-grid li span { display: block; font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-1); }
.book-actions { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; }
.book-note { font-size: var(--text-xs); color: var(--color-text-faint); max-width: 24ch; }

@media (max-width: 800px) {
  .book-card, .book-card.reverse { grid-template-columns: 1fr; }
  .book-card.reverse .book-cover-wrap { order: 0; }
  .book-cover-wrap { max-width: 260px; margin-inline: auto; }
  .book-cover-3d, .book-card.reverse .book-cover-3d { transform: rotateY(-16deg) rotateX(1deg); filter: drop-shadow(16px 22px 24px rgba(5,22,45,.35)); }
  .book-cover-wrap:hover .book-cover-3d, .book-card.reverse .book-cover-wrap:hover .book-cover-3d { transform: rotateY(-10deg) rotateX(1deg); }
  .book-card.reverse .book-cover-3d::before { background: linear-gradient(90deg, rgba(0,0,0,.55) 0%, rgba(0,0,0,.28) 2.5%, rgba(255,255,255,.10) 4%, rgba(0,0,0,0) 9%, rgba(0,0,0,0) 92%, rgba(0,0,0,.12) 100%); }
  .book-card.reverse .book-cover-3d::after { right: -14px; left: auto; border-radius: 0 4px 4px 0; transform: rotateY(90deg); transform-origin: left center; box-shadow: inset -2px 0 4px rgba(0,0,0,.15); }
  .cents-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============== MEMBERSHIP ============== */
.membership { background: var(--color-surface-2); }
.membership-card { max-width: var(--content-default); margin-inline: auto; text-align: center; }
.membership .eyebrow { justify-content: center; display: block; text-align: center; }
.membership .section-title, .membership .section-sub { text-align: center; margin-inline: auto; }
.tier-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); margin-block: var(--space-10); text-align: left; }
.tier { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); }
.tier h3 { font-size: var(--text-lg); margin-bottom: var(--space-3); color: var(--color-navy); }
.tier-perk { font-size: var(--text-base); font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-2); }
.tier-detail { font-size: var(--text-sm); color: var(--color-text-muted); }
.membership-fine { font-size: var(--text-sm); color: var(--color-text-faint); max-width: 60ch; margin-inline: auto; }
@media (max-width: 700px) { .tier-grid { grid-template-columns: 1fr; } }

/* ============== FRAMEWORK ============== */
.framework-section { background: var(--color-surface-3); }
.framework-grid { margin-top: var(--space-16); display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-6); }
.fw-step { text-align: center; padding: var(--space-6) var(--space-3); }
.fw-letter { display: grid; place-items: center; width: 56px; height: 56px; margin-inline: auto var(--space-4); border-radius: 50%; background: var(--color-navy); color: var(--color-primary); font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; }
.fw-step h3 { font-size: var(--text-base); margin-bottom: var(--space-2); color: var(--color-navy); }
.fw-step p { font-size: var(--text-sm); color: var(--color-text-strong-muted); line-height: 1.55; }
@media (max-width: 900px) { .framework-grid { grid-template-columns: repeat(2, 1fr); } }

/* ============== PLATFORM ============== */
.platform-section { position: relative; background: var(--color-navy); color: #fff; overflow: hidden; }
.platform-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .35; }
.platform-bg::after { content:""; position:absolute; inset:0; background: linear-gradient(90deg, var(--color-navy) 15%, rgba(10,26,48,.55) 60%, rgba(10,26,48,.2) 100%); }
.platform-inner { position: relative; z-index: 1; }
.platform-copy { max-width: 760px; }
.platform-section .section-title { color: #fff; }
.platform-section .section-sub { color: rgba(255,255,255,.75); }
.platform-points { display: flex; flex-direction: column; gap: var(--space-3); margin-block: var(--space-8); }
.platform-points li { position: relative; padding-left: var(--space-6); font-size: var(--text-sm); color: rgba(255,255,255,.9); }
.platform-points li::before { content:""; position:absolute; left:0; top:.55em; width:7px; height:7px; border-radius:50%; background: var(--color-primary); }
.manager-pitch { margin-top: var(--space-10); padding: var(--space-8); background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius-lg); }
.manager-pitch h3 { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: #fff; margin-bottom: var(--space-4); line-height: 1.3; }
.manager-pitch p { color: rgba(255,255,255,.82); margin-bottom: var(--space-3); max-width: 68ch; }
.manager-pitch p:last-child { margin-bottom: 0; }

.cert-levels { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); margin-block: var(--space-8); max-width: 900px; }
.cert-level { display: block; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); border-radius: 14px; padding: var(--space-5) var(--space-4); text-decoration: none; cursor: pointer; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.cert-level:hover, .cert-level:focus-visible { transform: translateY(-3px); border-color: var(--color-primary); background: rgba(255,255,255,.1); }
.cert-level h3 { color: #fff; font-size: var(--text-sm); margin: var(--space-2) 0 var(--space-2); }
.cert-level p { color: rgba(255,255,255,.72); font-size: var(--text-xs); line-height: 1.5; margin: 0; }
.cert-num { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,.1); color: var(--color-primary); font-family: var(--font-display); font-weight: 700; font-size: var(--text-sm); }
.cert-level-final { background: rgba(241,131,13,.14); border-color: rgba(241,131,13,.4); }
.cert-level-final .cert-num { background: var(--color-primary); color: var(--color-navy); }
.cert-level-final h3 { color: var(--color-primary); }
@media (max-width: 900px) { .cert-levels { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .cert-levels { grid-template-columns: 1fr; } }

/* ============== ABOUT ============== */
.about-inner { display: grid; grid-template-columns: 280px 1fr; gap: var(--space-12); align-items: start; }
.about-photo { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.about-lede { font-family: var(--font-accent); font-style: italic; font-size: var(--text-lg); color: var(--color-primary); margin-bottom: var(--space-5); }
.about-copy p { color: var(--color-text-muted); margin-bottom: var(--space-4); max-width: 62ch; }
.about-note { font-size: var(--text-sm); font-weight: 600; color: var(--color-navy); }
@media (max-width: 750px) { .about-inner { grid-template-columns: 1fr; } .about-photo { width: 160px; } }

/* ============== FINAL CTA ============== */
.cta-band { background: var(--color-navy-deep); color: #fff; padding-block: var(--space-24); text-align: center; }
.cta-title { font-size: var(--text-2xl); font-weight: 600; margin-bottom: var(--space-8); max-width: 720px; margin-inline: auto; }
.cta-inner .hero-actions { justify-content: center; margin-bottom: 0; }

/* ============== FOOTER ============== */
.site-footer { background: var(--color-navy); color: rgba(255,255,255,.7); padding-block: var(--space-12); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-6); }
.footer-brand .logo { color: #fff; margin-bottom: var(--space-2); }
.footer-brand p { font-size: var(--text-xs); color: rgba(255,255,255,.5); }
.footer-nav { display: flex; gap: var(--space-6); flex-wrap: wrap; }
.footer-nav a { font-size: var(--text-sm); transition: color var(--transition); }
.footer-nav a:hover { color: var(--color-primary); }

/* ============== REVEAL ANIMATION ============== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1); }
.reveal.in-view { opacity: 1; transform: translateY(0); }