/* ============================================
   MASTERY ENTERPRISES — DESIGN SYSTEM
   Premium Minimalist · Black & White Only
   ============================================ */

/* ── RESET & BASE ─────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --ink: #000000;
  --paper: #ffffff;
  --steel: #888888;
  --divider: #e0e0e0;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-w: 1200px;
  --nav-h: 80px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background-color: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
ul { list-style: none; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: var(--font); }
input, textarea, select { font-family: var(--font); }

/* ── TYPOGRAPHY ───────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

/* ── UTILITY ──────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

.section-divider {
  width: 100%;
  height: 1px;
  background-color: var(--divider);
}

/* ── FADE-IN ON SCROLL ────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-delay {
  transition-delay: 0.2s;
}

/* ── BUTTONS ──────────────────────────────── */
.btn {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 14px 32px;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition);
  border-radius: 0;
  line-height: 1;
}

.btn-primary {
  background-color: var(--ink);
  color: var(--paper);
}
.btn-primary:hover {
  background-color: var(--steel);
  border-color: var(--steel);
}

.btn-secondary {
  background-color: var(--paper);
  color: var(--ink);
}
.btn-secondary:hover {
  background-color: var(--ink);
  color: var(--paper);
}

/* ── LOGO IMAGE ───────────────────────────── */
.nav-logo-img {
  height: 52px;
  width: auto;
  display: block;
  object-fit: contain;
}

.footer-logo-img {
  height: 52px;
  width: auto;
  display: block;
  object-fit: contain;
  /* Invert logo to white for dark footer */
  filter: invert(1);
}

/* ── NAVIGATION ───────────────────────────── */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--paper);
  border-bottom: 1px solid var(--divider);
  height: var(--nav-h);
  transition: box-shadow var(--transition);
}
#site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  transition: color var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--ink);
  transition: width var(--transition);
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.nav-link-cta {
  padding: 8px 18px;
  border: 1px solid var(--ink);
  background: var(--paper);
}
.nav-link-cta::after { display: none; }
.nav-link-cta:hover {
  background: var(--ink);
  color: var(--paper);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--ink);
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── SECTION COMMON ───────────────────────── */
.section-header {
  margin-bottom: 72px;
}

.section-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--steel);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 900;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  line-height: 1.0;
  margin-bottom: 24px;
}

.section-subtitle {
  font-size: 16px;
  font-weight: 300;
  letter-spacing: 0.01em;
  color: var(--steel);
  max-width: 560px;
  line-height: 1.7;
}

/* ── HERO ─────────────────────────────────── */
.section-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}

.section-hero .container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0;
  padding-top: 80px;
  padding-bottom: 80px;
  min-height: calc(100vh - var(--nav-h));
}

.hero-geo {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 0;
  pointer-events: none;
  opacity: 0.06;
}
.geo-bar {
  background-color: var(--ink);
}
.geo-bar-1 { width: 220px; height: 80px; }
.geo-bar-2 { width: 340px; height: 80px; }
.geo-bar-3 { width: 500px; height: 80px; }

.hero-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--steel);
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-headline {
  font-size: clamp(56px, 9vw, 120px);
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  line-height: 0.95;
  margin-bottom: 32px;
}

.hero-value-prop {
  font-size: 18px;
  font-weight: 300;
  letter-spacing: 0.01em;
  color: var(--steel);
  max-width: 520px;
  line-height: 1.65;
  margin-bottom: 40px;
}

.hero-tagline {
  display: flex;
  gap: 40px;
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--divider);
}
.hero-tagline span {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
}

/* ── ABOUT ────────────────────────────────── */
.section-about {
  padding: 120px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  align-items: start;
}

.about-visual {
  position: sticky;
  top: calc(var(--nav-h) + 40px);
}

.about-photo-wrap {
  position: relative;
  border: 1px solid var(--divider);
  overflow: hidden;
  background-color: #f0f0f0;
}

.about-photo {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  object-position: center top;
  filter: grayscale(100%);
  transition: filter 0.4s ease;
}

.about-photo-wrap:hover .about-photo {
  filter: grayscale(80%);
}

.about-name {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.about-credentials {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--steel);
  text-transform: uppercase;
  line-height: 1.8;
  margin-bottom: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--divider);
}

.about-bio {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--ink);
  margin-bottom: 20px;
}

.about-philosophy {
  margin: 40px 0;
  padding: 32px;
  border-left: 3px solid var(--ink);
  background-color: #f9f9f9;
}

.philosophy-quote {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-style: italic;
  margin-bottom: 20px;
  line-height: 1.5;
  text-transform: none;
}

.about-credentials-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
  padding-top: 36px;
  border-top: 1px solid var(--divider);
}

.badge {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 8px 14px;
  border: 1px solid var(--ink);
  color: var(--ink);
  line-height: 1;
}

/* ── BOOKS ────────────────────────────────── */
.section-books {
  padding: 120px 0;
  background-color: #fafafa;
}

.books-category {
  margin-bottom: 72px;
}

.category-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--steel);
  text-transform: uppercase;
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--divider);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: var(--divider);
  border: 1px solid var(--divider);
}

.book-card {
  background-color: var(--paper);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background-color var(--transition);
  position: relative;
}
.book-card:hover {
  background-color: var(--ink);
  color: var(--paper);
}
.book-card:hover .book-number,
.book-card:hover .book-desc {
  color: rgba(255,255,255,0.6);
}
.book-card:hover .book-status {
  border-color: rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.6);
}
.book-card:hover .book-status.in-progress {
  border-color: rgba(255,255,255,0.5);
  color: rgba(255,255,255,0.8);
}

.book-number {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--steel);
  font-variant-numeric: tabular-nums;
}

.book-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  line-height: 1.2;
  flex-grow: 1;
}

.book-desc {
  font-size: 13px;
  font-weight: 400;
  color: var(--steel);
  line-height: 1.6;
}

.book-status {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
  border: 1px solid var(--divider);
  padding: 5px 10px;
  align-self: flex-start;
  margin-top: 4px;
}
.book-status.in-progress {
  color: var(--ink);
  border-color: var(--ink);
}

/* ── COURSES ──────────────────────────────── */
.section-courses {
  padding: 120px 0;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--divider);
  border: 1px solid var(--divider);
  margin-bottom: 72px;
}

.course-card {
  background-color: var(--paper);
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.course-icon {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 8px;
}
.ci-bar {
  height: 3px;
  background-color: var(--ink);
}
.ci-1 { width: 20px; }
.ci-2 { width: 30px; }
.ci-3 { width: 40px; }

.course-category {
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  line-height: 1.2;
}

.course-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.course-list li {
  font-size: 13px;
  font-weight: 400;
  color: var(--steel);
  line-height: 1.5;
  padding-left: 14px;
  position: relative;
}
.course-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 4px;
  height: 1px;
  background-color: var(--steel);
}

.courses-platforms {
  text-align: center;
  padding: 48px 0;
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
  margin-bottom: 72px;
}

.platforms-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--steel);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.platforms-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.platform-badge {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.platform-divider {
  width: 1px;
  height: 24px;
  background-color: var(--divider);
}

.courses-capture {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.capture-title {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.capture-subtitle {
  font-size: 14px;
  font-weight: 300;
  color: var(--steel);
  line-height: 1.65;
  margin-bottom: 28px;
  letter-spacing: 0.01em;
}

.capture-form .form-row {
  display: flex;
  gap: 0;
}

.capture-form input[type="email"] {
  flex: 1;
  padding: 14px 20px;
  border: 1px solid var(--ink);
  border-right: none;
  background-color: var(--paper);
  color: var(--ink);
  font-size: 14px;
  font-weight: 400;
  outline: none;
  border-radius: 0;
}
.capture-form input[type="email"]::placeholder {
  color: var(--steel);
}
.capture-form input[type="email"]:focus {
  border-color: var(--ink);
  background-color: #f9f9f9;
}

/* ── COACHING ─────────────────────────────── */
.section-coaching {
  padding: 120px 0;
  background-color: #fafafa;
}

.coaching-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: var(--divider);
  border: 1px solid var(--divider);
  margin-bottom: 48px;
}

.coaching-card {
  background-color: var(--paper);
  padding: 48px 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.coaching-number {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--steel);
}

.coaching-type {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  line-height: 1.15;
}

.coaching-desc {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--ink);
  flex-grow: 1;
}

.coaching-ideal {
  font-size: 12px;
  font-weight: 500;
  color: var(--steel);
  line-height: 1.5;
  letter-spacing: 0.02em;
  padding-top: 16px;
  border-top: 1px solid var(--divider);
}

.coaching-footer {
  text-align: center;
  padding-top: 48px;
}
.coaching-note {
  font-size: 14px;
  font-weight: 400;
  color: var(--steel);
  letter-spacing: 0.02em;
  line-height: 1.6;
  font-style: italic;
}

/* ── CONTACT ──────────────────────────────── */
.section-contact {
  padding: 120px 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 14px 18px;
  border: 1px solid var(--divider);
  background-color: var(--paper);
  color: var(--ink);
  font-size: 14px;
  font-weight: 400;
  outline: none;
  border-radius: 0;
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #bbb;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--ink);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-message {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-top: 4px;
  min-height: 18px;
}
.form-message.success { color: #000; }
.form-message.error { color: #888; }

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 8px;
}

.contact-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.contact-label-text {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
}

.contact-email-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--divider);
  padding-bottom: 2px;
  display: inline-block;
  transition: border-color var(--transition);
}
.contact-email-link:hover {
  border-color: var(--ink);
}

.contact-detail {
  font-size: 14px;
  font-weight: 400;
  color: var(--ink);
}

.contact-separator {
  width: 100%;
  height: 1px;
  background-color: var(--divider);
}

.contact-note {
  font-size: 13px;
  font-weight: 400;
  color: var(--steel);
  line-height: 1.6;
  font-style: italic;
}

/* ── FOOTER ───────────────────────────────── */
#site-footer {
  background-color: var(--ink);
  color: var(--paper);
  padding: 64px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-tagline {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}

.footer-copy {
  font-size: 14px;
  font-weight: 400;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.05em;
}

.footer-email {
  font-size: 15px;
  font-weight: 400;
  color: rgba(255,255,255,0.65);
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(255,255,255,0.3);
  padding-bottom: 3px;
  transition: color var(--transition);
}
.footer-email:hover {
  color: var(--paper);
}

/* ── RESPONSIVE ───────────────────────────── */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .about-visual {
    position: static;
  }

  .coaching-grid {
    grid-template-columns: 1fr;
  }
  .coaching-card { padding: 36px 28px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  .container { padding: 0 20px; }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background-color: var(--paper);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    border-bottom: 1px solid var(--divider);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    padding: 8px 0;
  }
  .nav-links.open { display: flex; }
  .nav-link {
    width: 100%;
    padding: 14px 24px;
    font-size: 12px;
  }
  .nav-link::after { display: none; }
  .nav-link-cta {
    margin: 8px 24px;
    width: calc(100% - 48px);
    text-align: center;
    border: 1px solid var(--ink);
  }
  .nav-toggle { display: flex; }

  .section-hero .container {
    padding-top: 60px;
    padding-bottom: 60px;
  }
  .hero-geo { display: none; }
  .hero-tagline {
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 48px;
  }

  .section-about,
  .section-books,
  .section-courses,
  .section-coaching,
  .section-contact {
    padding: 80px 0;
  }

  .section-header { margin-bottom: 48px; }

  .books-grid {
    grid-template-columns: 1fr;
  }

  .courses-grid {
    grid-template-columns: 1fr;
  }

  .capture-form .form-row {
    flex-direction: column;
    gap: 12px;
  }
  .capture-form input[type="email"] {
    border-right: 1px solid var(--ink);
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .coaching-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-headline {
    font-size: 48px;
  }
  .section-title {
    font-size: 36px;
  }
  .about-credentials-badges {
    flex-direction: column;
  }
  .badge { align-self: flex-start; }
  .platforms-row { flex-direction: column; gap: 12px; }
  .platform-divider { display: none; }
}