/* ===================================================
   Dr. Scott McDonald — Author Website
   Color palette: Deep teal + warm gold + cream white
   Fonts: Playfair Display (display) + Inter (body)
   =================================================== */

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

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, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: rgba(201, 168, 76, 0.3);
  color: var(--color-text);
}

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

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

button { cursor: pointer; background: none; border: none; }
a { text-decoration: none; color: inherit; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ---- DESIGN TOKENS ---- */
:root {
  /* Fonts */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* 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, 5rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --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;

  /* Brand Colors */
  --teal-deep: #0D4F5C;
  --teal-dark: #0A3E48;
  --teal-darker: #072D34;
  --gold: #C9A84C;
  --gold-hover: #B8952F;
  --gold-light: #D4B96A;
  --cream: #F9F6EE;
  --cream-dark: #F0EBE0;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* ---- LIGHT MODE (default) ---- */
:root, [data-theme="light"] {
  --color-bg: #F9F6EE;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F0EBE0;
  --color-text: #1A2E35;
  --color-text-muted: #5A6B72;
  --color-text-faint: #8A9BA2;
  --color-border: #D8D2C4;
  --color-divider: #E5E0D4;
  --header-bg: rgba(249, 246, 238, 0.92);
  --hero-gradient-start: #0D4F5C;
  --hero-gradient-end: #0A3E48;
  --credential-bg: #0A3E48;
  --footer-bg: #072D34;
  --footer-text: #C8D5D9;
  --footer-text-muted: #7A9BA5;
  --pull-quote-bg: #0D4F5C;
  --pull-quote-text: #F9F6EE;
  --book-row-hover: rgba(13, 79, 92, 0.04);
  --contact-card-bg: #FFFFFF;
  --contact-card-border: #D8D2C4;
}

/* ---- DARK MODE ---- */
[data-theme="dark"] {
  --color-bg: #0F1A1D;
  --color-surface: #162226;
  --color-surface-alt: #1C2C31;
  --color-text: #D8E2E5;
  --color-text-muted: #8A9BA2;
  --color-text-faint: #5A6B72;
  --color-border: #2A3A40;
  --color-divider: #223035;
  --header-bg: rgba(15, 26, 29, 0.92);
  --hero-gradient-start: #0A3E48;
  --hero-gradient-end: #072D34;
  --credential-bg: #0A3038;
  --footer-bg: #0A1215;
  --footer-text: #A8B8BD;
  --footer-text-muted: #5A7A85;
  --pull-quote-bg: #162226;
  --pull-quote-text: #D8E2E5;
  --book-row-hover: rgba(201, 168, 76, 0.06);
  --contact-card-bg: #162226;
  --contact-card-border: #2A3A40;
}

/* ---- INTERACTIVE BASE ---- */
a, button, [role='button'], [role='link'], input, textarea, select {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}

/* ===================================================
   HEADER
   =================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s var(--ease-out);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.logo-credentials {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.nav-link--secondary {
  font-size: var(--text-xs);
  color: var(--gold);
  font-weight: 500;
}

.nav-link--secondary:hover {
  color: var(--gold-hover);
  background: transparent;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: transparent;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  border-radius: var(--radius-md);
}

.hamburger:hover {
  background: var(--color-surface-alt);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
}
.hamburger.active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===================================================
   HERO
   =================================================== */
.hero {
  background: linear-gradient(135deg, var(--hero-gradient-start) 0%, var(--hero-gradient-end) 100%);
  padding: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-6);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: center;
  width: 100%;
}

.hero-monogram {
  display: flex;
  align-items: center;
  justify-content: center;
}

.monogram {
  width: clamp(140px, 18vw, 220px);
  height: clamp(140px, 18vw, 220px);
  border-radius: 50%;
  border: 3px solid var(--gold);
  background: rgba(13, 79, 92, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.monogram-text {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 500;
  color: var(--gold);
  letter-spacing: 0.05em;
  line-height: 1;
}

.hero-content {
  color: var(--cream);
}

.hero-eyebrow {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-3);
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--cream);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  font-style: italic;
  color: rgba(249, 246, 238, 0.85);
  margin-bottom: var(--space-6);
  max-width: 55ch;
}

.hero-desc {
  font-size: var(--text-base);
  color: rgba(249, 246, 238, 0.75);
  max-width: 55ch;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn--gold {
  background: var(--gold);
  color: #1A2E35;
  border-color: var(--gold);
}

.btn--gold:hover {
  background: var(--gold-hover);
  border-color: var(--gold-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(201, 168, 76, 0.3);
}

.btn--gold:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--outline {
  background: transparent;
  color: var(--cream);
  border-color: rgba(249, 246, 238, 0.4);
}

.btn--outline:hover {
  background: rgba(249, 246, 238, 0.1);
  border-color: rgba(249, 246, 238, 0.7);
  transform: translateY(-1px);
}

.btn--outline:active {
  transform: translateY(0);
}

/* ===================================================
   CREDENTIALS BAR
   =================================================== */
.credentials {
  background: var(--credential-bg);
  padding: var(--space-10) var(--space-6);
}

.credentials-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  text-align: center;
}

.credential-tile {
  padding: var(--space-4);
}

.credential-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--gold);
  margin-bottom: var(--space-1);
}

.credential-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  color: rgba(249, 246, 238, 0.65);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ===================================================
   ABOUT
   =================================================== */
.about {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-bg);
}

.about-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: start;
}

.section-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.about-prose p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-5);
}

.about-prose p:last-child {
  margin-bottom: 0;
}

.about-aside {
  position: sticky;
  top: 7rem;
}

.pull-quote {
  background: var(--pull-quote-bg);
  color: var(--pull-quote-text);
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--gold);
}

.pull-quote p {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  line-height: 1.5;
  margin-bottom: var(--space-4);
  max-width: none;
}

.pull-quote cite {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-style: normal;
  font-weight: 500;
  color: var(--gold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ===================================================
   BOOKS
   =================================================== */
.books {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-surface-alt);
}

.books-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.books-header {
  text-align: center;
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}

.books-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.book-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.book-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-6);
  align-items: center;
  padding: var(--space-6) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  transition: background 0.2s var(--ease-out);
}

.book-row:first-child {
  border-top: 1px solid var(--color-divider);
}

.book-row:hover {
  background: var(--book-row-hover);
}

.book-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--gold);
  min-width: 3ch;
}

.book-info {
  min-width: 0;
}

.book-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.book-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.book-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--gold);
  text-decoration: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.book-link:hover {
  color: var(--gold-hover);
}

.books-cta {
  text-align: center;
  margin-top: clamp(var(--space-8), 4vw, var(--space-12));
}

/* ===================================================
   SPEAKING & MEDIA
   =================================================== */
.speaking {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-bg);
}

.speaking-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.speaking-inner > .section-title {
  text-align: center;
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}

.speaking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: start;
}

.speaking-topics-heading {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.topics-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.topic-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.topic-icon {
  flex-shrink: 0;
  color: var(--gold);
  margin-top: 2px;
}

.topic-icon svg {
  display: inline-block;
}

.contact-card {
  background: var(--contact-card-bg);
  border: 1px solid var(--contact-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.contact-card-heading {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.contact-card-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
}

.contact-row svg {
  flex-shrink: 0;
  color: var(--gold);
  display: inline-block;
}

.contact-row a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}

.contact-row a:hover {
  color: var(--gold);
}

.contact-response {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-style: italic;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

/* ===================================================
   FOOTER
   =================================================== */
.site-footer {
  background: var(--footer-bg);
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.footer-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--cream);
  margin-bottom: var(--space-4);
}

.footer-creds {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--footer-text-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--footer-text);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--gold);
}

.footer-divider {
  color: var(--footer-text-muted);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--footer-text-muted);
  margin-bottom: var(--space-4);
}

.footer-disclaimer {
  font-size: var(--text-xs);
  color: var(--footer-text-muted);
  max-width: 60ch;
  margin: 0 auto;
  line-height: 1.6;
  opacity: 0.75;
}

/* ===================================================
   FADE-IN ANIMATION
   =================================================== */
.fade-in {
  opacity: 1; /* Fallback: visible by default */
}

/* ===================================================
   RESPONSIVE: TABLET
   =================================================== */
@media (max-width: 960px) {
  .about-inner {
    grid-template-columns: 1fr;
  }

  .about-aside {
    position: static;
  }

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

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-monogram {
    justify-content: center;
  }

  .hero-subtitle,
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-ctas {
    justify-content: center;
  }
}

/* ===================================================
   RESPONSIVE: MOBILE
   =================================================== */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease-out);
  }

  .main-nav.open {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }

  .nav-link {
    font-size: var(--text-lg);
    padding: var(--space-3) var(--space-6);
  }

  .nav-link--secondary {
    font-size: var(--text-sm);
    margin-top: var(--space-4);
  }

  .credentials-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .book-row {
    grid-template-columns: auto 1fr;
    gap: var(--space-3);
  }

  .book-link {
    grid-column: 2;
    justify-self: start;
  }

  .hero {
    min-height: auto;
    padding: clamp(var(--space-12), 8vw, var(--space-20)) var(--space-6);
  }

  .monogram {
    width: 120px;
    height: 120px;
  }

  .monogram-text {
    font-size: 2.5rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: var(--space-3) var(--space-4);
  }

  .logo-name {
    font-size: var(--text-base);
  }

  .credentials-inner {
    grid-template-columns: 1fr 1fr;
  }

  .credential-number {
    font-size: var(--text-lg);
  }
}