/* ============================================
   ATHENA'S ZEPHYR CONSULTING — Design Tokens
   Palette: Maroon + Steel Blue from logo
   Tone: Authoritative, Federal, Professional
   ============================================ */

:root,
[data-theme='light'] {
  /* 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 */
  --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;

  /* Surfaces — warm ivory */
  --color-bg: #FAFAF7;
  --color-surface: #FFFFFF;
  --color-surface-2: #F5F4F0;
  --color-border: #D6D3CC;
  --color-divider: #E5E2DC;

  /* Text */
  --color-text: #1A1A1A;
  --color-text-muted: #5A5A5A;
  --color-text-faint: #9A9A9A;
  --color-text-inverse: #FAFAF7;

  /* Primary — Maroon from logo */
  --color-primary: #8B2332;
  --color-primary-hover: #6E1C28;
  --color-primary-active: #52151E;

  /* Secondary — Steel Blue/Teal from logo */
  --color-secondary: #3A6B7C;
  --color-secondary-hover: #2D5563;
  --color-secondary-active: #1F3F4A;

  /* Accents */
  --color-gold: #B8923F;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

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

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.1);

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

  /* Fonts */
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
}

[data-theme='dark'] {
  --color-bg: #141414;
  --color-surface: #1C1C1C;
  --color-surface-2: #222222;
  --color-border: #333333;
  --color-divider: #2A2A2A;
  --color-text: #E0DDD8;
  --color-text-muted: #9A9894;
  --color-text-faint: #5A5957;
  --color-text-inverse: #141414;
  --color-primary: #C4566A;
  --color-primary-hover: #A8475A;
  --color-primary-active: #8B3A4A;
  --color-secondary: #5A9AAD;
  --color-secondary-hover: #4A8090;
  --color-secondary-active: #3A6674;
  --color-gold: #D4AB55;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141414;
    --color-surface: #1C1C1C;
    --color-surface-2: #222222;
    --color-border: #333333;
    --color-divider: #2A2A2A;
    --color-text: #E0DDD8;
    --color-text-muted: #9A9894;
    --color-text-faint: #5A5957;
    --color-text-inverse: #141414;
    --color-primary: #C4566A;
    --color-primary-hover: #A8475A;
    --color-primary-active: #8B3A4A;
    --color-secondary: #5A9AAD;
    --color-secondary-hover: #4A8090;
    --color-secondary-active: #3A6674;
    --color-gold: #D4AB55;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  }
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--content-default);
}

section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* ============================================
   HEADER / NAV
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-img {
  height: 2.5rem;
  width: auto;
  border-radius: var(--radius-sm);
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-list a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav-list a:hover {
  color: var(--color-primary);
}

.theme-toggle {
  padding: var(--space-2);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* Mobile nav */
.mobile-toggle {
  display: none;
  padding: var(--space-2);
  color: var(--color-text);
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-divider);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
  }

  .nav-list.open {
    display: flex;
  }
}

/* ============================================
   HERO
   ============================================ */

.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-surface-2) 100%);
  border-bottom: 1px solid var(--color-divider);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-6);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero h1 span {
  color: var(--color-primary);
}

.hero-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .hero-desc {
    margin-inline: auto;
  }
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.hero-cta:hover {
  background: var(--color-primary-hover);
}

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

.headshot-container {
  position: relative;
}

.headshot {
  width: 320px;
  height: 400px;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 3px solid var(--color-surface);
}

@media (max-width: 768px) {
  .headshot {
    width: 240px;
    height: 300px;
  }
}

/* ============================================
   ABOUT
   ============================================ */

.about {
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.stat {
  text-align: center;
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
}

.stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============================================
   COMPETENCIES
   ============================================ */

.competencies {
  background: var(--color-surface-2);
}

.competency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.competency-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  transition: box-shadow var(--transition-interactive),
              border-color var(--transition-interactive);
}

.competency-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border);
}

.competency-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-secondary) 10%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--color-secondary);
}

.competency-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.competency-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ============================================
   CERTIFICATIONS / DIFFERENTIATORS
   ============================================ */

.certs {
  background: var(--color-bg);
}

.cert-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  margin-top: var(--space-10);
}

@media (max-width: 768px) {
  .cert-columns {
    grid-template-columns: 1fr;
  }
}

.cert-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.cert-list li {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-weight: 500;
}

.naics-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.naics-item {
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
}

.naics-code {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-secondary);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.naics-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.subsection-title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

/* ============================================
   BOOK
   ============================================ */

.book {
  background: var(--color-surface-2);
}

.book-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-12);
  align-items: start;
  margin-top: var(--space-10);
}

@media (max-width: 768px) {
  .book-grid {
    grid-template-columns: 1fr;
  }
}

.book-cover {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  max-width: 320px;
  aspect-ratio: 2 / 3;
  background: #f5f5f3;
}

.book-cover-image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}

.book-details h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.book-details p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.chapter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

@media (max-width: 480px) {
  .chapter-grid {
    grid-template-columns: 1fr;
  }
}

.chapter-item {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
}

.chapter-num {
  font-weight: 700;
  color: var(--color-secondary);
  margin-right: var(--space-1);
}

/* ============================================
   CONFERENCE TOUR
   ============================================ */

.tour {
  background: var(--color-bg);
}

.tour-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-10);
}

.tour-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-6);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  align-items: start;
}

@media (max-width: 640px) {
  .tour-item {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
}

.tour-date {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.tour-event {
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 500;
}

.tour-venue {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ============================================
   FOUNDER BIO
   ============================================ */

.founder {
  background: var(--color-surface-2);
}

.founder-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-12);
  align-items: start;
  margin-top: var(--space-10);
}

@media (max-width: 768px) {
  .founder-grid {
    grid-template-columns: 1fr;
  }
}

.founder-photo {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.founder-details h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.founder-role {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-6);
}

.founder-details p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.credential-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.credential-tag {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  background: color-mix(in srgb, var(--color-secondary) 10%, transparent);
  color: var(--color-secondary);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* ============================================
   CONTACT
   ============================================ */

.contact {
  background: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  margin-top: var(--space-10);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  margin-bottom: var(--space-6);
}

.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}

.contact-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-1);
}

.contact-value {
  font-size: var(--text-sm);
  color: var(--color-text);
}

.contact-value a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact-value a:hover {
  text-decoration: underline;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 12%, transparent);
}

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

.form-submit {
  align-self: flex-start;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
}

.form-submit:hover {
  background: var(--color-primary-hover);
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-sdvosb {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============================================
   ANIMATIONS
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   CROSS-SITE NAV LINK (to Tugend Robotics)
   ============================================ */
.nav-cross-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-primary);
  border-radius: 999px;
  color: var(--color-primary) !important;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.nav-cross-link:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse) !important;
}