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

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-light: #555555;
  --color-accent: #1a1a1a;
  --color-border: #e0e0e0;
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1100px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* Header / Nav */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-title a {
  color: var(--color-text);
}

.site-title a:hover {
  text-decoration: none;
}

.site-logo {
  height: 40px;
  width: auto;
  display: block;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.2s;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-text);
  text-decoration: none;
}

.social-links {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.social-links a {
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

.social-links a:hover {
  color: var(--color-text);
}

.social-links svg {
  display: block;
}

/* Hero Banner */
.hero-banner {
  position: relative;
  width: 100%;
  min-height: 460px;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-banner-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-banner-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 3rem;
  width: 100%;
}

.hero-banner-content h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: #ffffff;
  text-align: left;
  max-width: 600px;
  margin-bottom: 1.25rem;
}

.hero-banner-content p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  text-align: left;
  max-width: 600px;
  margin-bottom: 1.5rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
  background: transparent;
  transition: all 0.2s;
  cursor: pointer;
}

.btn:hover {
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
}

.btn-filled {
  background: var(--color-accent);
  color: #fff;
}

.btn-filled:hover {
  background: transparent;
  color: var(--color-accent);
}

.btn.btn-banner {
  border-color: #ffffff;
  color: #ffffff;
  background: transparent;
}

.btn.btn-banner:hover {
  background: #ffffff;
  color: #1a1a2e;
}

/* Advisory Section */
.advisory {
  background: #f7f7f7;
  padding: 5rem 2rem;
  text-align: center;
}

.advisory-inner {
  max-width: 700px;
  margin: 0 auto;
}

.advisory p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 2rem;
}

/* Experience / Logos Section */
.experience {
  padding: 5rem 2rem;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.experience h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

.logo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  align-items: center;
  justify-items: center;
  max-width: 800px;
  margin: 0 auto;
}

.logo-grid img {
  max-height: 60px;
  width: auto;
  opacity: 0.85;
  transition: opacity 0.2s;
  filter: grayscale(20%);
}

.logo-grid img:hover {
  opacity: 1;
  filter: grayscale(0%);
}

/* About Page */
.about-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 3rem;
  align-items: start;
}

.about-image img {
  width: 100%;
  border-radius: 6px;
  display: block;
}

.about-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.about-content p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 1.5rem;
}

.about-content p a {
  font-weight: 600;
  border-bottom: 1px solid var(--color-accent);
}

.about-content p a:hover {
  text-decoration: none;
  opacity: 0.7;
}

.about-cta {
  margin-top: 2rem;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-text);
}

/* Contact Page */
.contact-content {
  max-width: 600px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.contact-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

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

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  font-family: var(--font-main);
  font-size: 1rem;
  color: var(--color-text);
  background: #fff;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-submit {
  margin-top: 0.5rem;
}

/* Speaking & Advisory Page */
.speaking-hero {
  background: #f7f7f7;
  padding: 4rem 2rem;
}

.speaking-hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: center;
}

.speaking-hero-text h1 {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  line-height: 1.1;
}

.speaking-hero-text p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.speaking-hero-image img {
  width: 100%;
  border-radius: 6px;
  display: block;
}

/* Speaking Topics */
.speaking-topics {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 2rem;
}

.speaking-topics h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
  text-align: center;
}

.topics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.topic-card {
  padding: 2rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: box-shadow 0.2s;
}

.topic-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.topic-icon {
  color: #0f3460;
  margin-bottom: 1rem;
}

.topic-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.topic-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* Advisory Services */
.advisory-services {
  background: #1a1a2e;
  padding: 5rem 2rem;
}

.advisory-services-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.advisory-services h2 {
  font-size: 2rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  text-align: center;
}

.advisory-services-intro {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-item {
  padding: 2rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

.service-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.service-item p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
}

/* Past Events */
.past-events {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 2rem;
}

.past-events h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
  text-align: center;
}

.events-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.event-item {
  display: flex;
  gap: 2rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

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

.event-year {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #0f3460;
  min-width: 70px;
  padding-top: 0.2rem;
}

.event-details h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.event-details p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* Speaking CTA */
.speaking-cta {
  background: #f7f7f7;
  padding: 5rem 2rem;
  text-align: center;
}

.speaking-cta-inner {
  max-width: 600px;
  margin: 0 auto;
}

.speaking-cta h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.speaking-cta p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 2rem;
}

/* Scroll Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

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

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 2rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-copy {
  font-size: 0.8rem;
  color: #aaa;
  letter-spacing: 0.02em;
}

.footer-social {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.footer-social a {
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

.footer-social a:hover {
  color: var(--color-text);
  text-decoration: none;
}

.footer-social svg {
  display: block;
}

/* Mobile Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: 0.3s;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
  }

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

  .site-header {
    position: relative;
  }

  .hero-banner-content h1 {
    font-size: 2.2rem;
  }

  .hero-banner {
    min-height: auto;
  }

  .hero-banner-content {
    padding: 2.5rem 2rem;
  }

  .about-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-image img {
    max-width: 400px;
  }

  .speaking-hero-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .speaking-hero-text h1 {
    font-size: 2.2rem;
  }

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

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

  .event-item {
    flex-direction: column;
    gap: 0.5rem;
  }

  .logo-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}