/* ==========================================================================
   UX Leadership Platform - Design System & Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables - Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Typography Scale */
  --font-family-heading: 'Georgia', 'Times New Roman', serif;
  --font-family-body: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  
  --font-size-h1: clamp(2.5rem, 5vw, 3.5rem);
  --font-size-h2: clamp(1.75rem, 3vw, 2.25rem);
  --font-size-h3: clamp(1.25rem, 2vw, 1.5rem);
  --font-size-h4: 1.125rem;
  --font-size-body: 1.0625rem;
  --font-size-small: 0.875rem;
  
  --line-height-heading: 1.2;
  --line-height-body: 1.7;
  
  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-xxl: 6rem;
  
  /* Color Palette - Neutral with subtle accent */
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #4a4a4a;
  --color-text-muted: #717171;
  --color-background: #ffffff;
  --color-background-alt: #F8FAFC;
  --color-border: #e0e0e0;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  
  /* Layout */
  --max-width-content: 720px;
  --max-width-wide: 1080px;
  --nav-height: 72px;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-body);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent-hover);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-family-heading);
  line-height: var(--line-height-heading);
  color: var(--color-text-primary);
  font-weight: 400;
}

h1 { font-size: var(--font-size-h1); margin-bottom: var(--space-md); }
h2 { font-size: var(--font-size-h2); margin-bottom: var(--space-md); }
h3 { font-size: var(--font-size-h3); margin-bottom: var(--space-sm); }
h4 { font-size: var(--font-size-h4); margin-bottom: var(--space-sm); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

.lead {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

small, .text-small {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Layout Components
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--wide {
  max-width: var(--max-width-wide);
}

.section {
  padding: var(--space-xl) 0;
}

.section--alt {
  background-color: var(--color-background-alt);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.nav__logo {
  font-family: var(--font-family-body);
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing:1px;
  font-size: 1.25rem;
  color: var(--color-text-primary);
  text-decoration: none;
}

.nav__logo:hover {
  color: var(--color-text-primary);
}

.nav__links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav__link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  font-weight: 500;
  text-transform: capitalize;
  letter-spacing: 0.05em;
  padding: var(--space-xs) 0;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  margin: 5px 0;
  transition: transform 0.2s ease;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav__toggle {
    display: block;
  }
  
  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
  }
  
  .nav__links.is-open {
    display: flex;
  }
  
  .nav__link {
    padding: var(--space-sm) 0;
    border-bottom: none;
  }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding: var(--space-xxl) 0;
  text-align: left;
}

.hero__headline {
  margin-bottom: var(--space-md);
}

.hero__subtext {
  font-size: 1.25rem;
  max-width: 600px;
  margin-bottom: var(--space-lg);
}

/* --------------------------------------------------------------------------
   Work Cards
   -------------------------------------------------------------------------- */
.work-grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .work-grid--two {
    grid-template-columns: repeat(2, 1fr);
  }
}

.work-card {
  display: block;
  padding: var(--space-lg);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  text-decoration: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.work-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.work-card__title {
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.work-card__summary {
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.work-card__meta {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* --------------------------------------------------------------------------
   Experience Section
   -------------------------------------------------------------------------- */
.experience-list {
  list-style: none;
}

.experience-item {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.experience-item:last-child {
  border-bottom: none;
}

.experience-item__role {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-h4);
  margin-bottom: var(--space-xs);
}

.experience-item__company {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.experience-item__dates {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.experience-item__outcome {
  margin-top: var(--space-xs);
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: var(--line-height-body);
}

/* --------------------------------------------------------------------------
   Case Study Styles
   -------------------------------------------------------------------------- */
.case-study-header {
  padding: var(--space-xxl) 0 var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.case-study-header__meta {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.case-study-section {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.case-study-section:last-of-type {
  border-bottom: none;
}

.case-study-section h2 {
  margin-bottom: var(--space-md);
}

.quote-block {
  padding: var(--space-lg);
  background-color: var(--color-background-alt);
  border-left: 3px solid var(--color-accent);
  margin: var(--space-lg) 0;
}

.quote-block__text {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-h4);
  font-style: italic;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.quote-block__author {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.metrics-grid {
  display: grid;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

@media (min-width: 640px) {
  .metrics-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.metric {
  text-align: center;
  padding: var(--space-md);
  background-color: var(--color-background-alt);
  border-radius: 4px;
}

.metric__value {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-h2);
  color: var(--color-accent);
  display: block;
}

.metric__label {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Buttons & CTAs
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-body);
  font-weight: 500;
  text-decoration: none;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  color: #ffffff;
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn--secondary:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}

.footer__link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
}

.footer__link:hover {
  color: var(--color-accent);
}

.footer__copyright {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Page-specific: About
   -------------------------------------------------------------------------- */
.about-intro {
  display: grid;
  gap: var(--space-xl);
  align-items: start;
}

@media (min-width: 768px) {
  .about-intro {
    grid-template-columns: 1fr 2fr;
  }
}

.about-photo {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1;
  background-color: var(--color-background-alt);
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   Page-specific: Speaking
   -------------------------------------------------------------------------- */
.speaking-list {
  list-style: none;
}

.speaking-item {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.speaking-item:last-child {
  border-bottom: none;
}

.speaking-item__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-h3);
  margin-bottom: var(--space-xs);
}

.speaking-item__event {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.speaking-item__date {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Page-specific: Contact
   -------------------------------------------------------------------------- */
.contact-content {
  max-width: 600px;
}

.contact-methods {
  list-style: none;
  margin-top: var(--space-lg);
}

.contact-methods li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.contact-methods li:last-child {
  border-bottom: none;
}

/* --------------------------------------------------------------------------
   Timeline Component
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  padding-left: var(--space-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-lg) - 5px);
  top: 6px;
  width: 12px;
  height: 12px;
  background-color: var(--color-background);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__header {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  margin-bottom: var(--space-sm);
}

.timeline__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

.timeline__logo--placeholder {
  width: 48px;
  height: 48px;
  background-color: var(--color-background-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-heading);
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.timeline__meta {
  flex: 1;
}

.timeline__role {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-h4);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.timeline__company {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.timeline__dates {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.timeline__outcomes {
  list-style: none;
  margin: var(--space-sm) 0;
  padding-left: 0;
}

.timeline__outcomes li {
  position: relative;
  padding-left: var(--space-md);
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
  font-size: var(--font-size-body);
}

.timeline__outcomes li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 2px;
  background-color: var(--color-accent);
}

.timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Education Section
   -------------------------------------------------------------------------- */
.education-grid {
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .education-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.education-item {
  padding: var(--space-md);
  background-color: var(--color-background-alt);
  border-radius: 4px;
}

.education-item__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-body);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.education-item__org {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Scroll Reveal Animations
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   Page Transitions
   -------------------------------------------------------------------------- */
body {
  opacity: 0;
  transition: opacity 0.3s ease;
}

body.page-loaded {
  opacity: 1;
}

body.page-exit {
  opacity: 0;
}

/* --------------------------------------------------------------------------
   Hero with Headshot
   -------------------------------------------------------------------------- */
.hero--with-photo {
  padding: var(--space-xl) 0;
}

.hero--with-photo .container {
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}

@media (min-width: 768px) {
  .hero--with-photo .container {
    grid-template-columns: 160px 1fr;
  }
}

.hero__headshot {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-background-alt);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* --------------------------------------------------------------------------
   Strategic Pillars
   -------------------------------------------------------------------------- */
.pillars-grid {
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .pillars-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pillar-card {
  padding: var(--space-lg);
  background-color: var(--color-background-alt);
  border-radius: 8px;
  transition: box-shadow 0.2s ease;
}

.pillar-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.pillar-card__icon {
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

.pillar-card__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-h4);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.pillar-card__desc {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Enhanced Experience Timeline (with dates on left)
   -------------------------------------------------------------------------- */
.exp-timeline {
  position: relative;
}

.exp-timeline__item {
  display: grid;
  gap: var(--space-md);
  padding-bottom: var(--space-xl);
  position: relative;
}

@media (min-width: 768px) {
  .exp-timeline__item {
    grid-template-columns: 120px 1fr;
  }
}

.exp-timeline__item:last-child {
  padding-bottom: 0;
}

.exp-timeline__dates {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.exp-timeline__current {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background-color: var(--color-text-primary);
  color: var(--color-background);
  font-size: 0.75rem;
  border-radius: 4px;
  margin-top: var(--space-xs);
}

.exp-timeline__content {
  padding: var(--space-lg);
  background-color: var(--color-background-alt);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
  position: relative;
}

.exp-timeline__content::before {
  content: '';
  position: absolute;
  left: -9px;
  top: var(--space-lg);
  width: 12px;
  height: 12px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.exp-timeline__header {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  margin-bottom: var(--space-sm);
}

.exp-timeline__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 4px;
}

.exp-timeline__logo--placeholder {
  width: 44px;
  height: 44px;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.exp-timeline__meta {
  flex: 1;
}

.exp-timeline__role {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-h4);
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.exp-timeline__company {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.exp-timeline__desc {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: var(--line-height-body);
  margin-bottom: var(--space-sm);
}

.exp-timeline__outcomes {
  list-style: none;
  margin: var(--space-sm) 0;
  padding-left: 0;
}

.exp-timeline__outcomes li {
  position: relative;
  padding-left: var(--space-md);
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
  font-size: var(--font-size-body);
}

.exp-timeline__outcomes li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 2px;
  background-color: var(--color-accent);
}

.exp-timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

/* --------------------------------------------------------------------------
   Speaking Cards Grid
   -------------------------------------------------------------------------- */
.speaking-grid {
  display: grid;
  gap: var(--space-lg);
}

.speaking-card {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg);
  background-color: var(--color-background);
  border-radius: 8px;
  transition: box-shadow 0.2s ease;
}

.speaking-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.speaking-card__icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.speaking-card__content {
  flex: 1;
}

.speaking-card__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-h4);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.speaking-card__event {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.speaking-card__desc {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

.speaking-card__type {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-left: auto;
  flex-shrink: 0;
  align-self: flex-start;
}

.speaking-card__image {
  width: 120px;
  height: 80px;
  background-color: var(--color-background);
  border-radius: 4px;
  flex-shrink: 0;
  object-fit: cover;
}

.speaking-card__image--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

/* --------------------------------------------------------------------------
   Card Hover Effects
   -------------------------------------------------------------------------- */
.work-card,
.education-item {
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.work-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.education-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }