/* ============================================
   MANIFOLD CONFERENCE - Clean Minimal Design
   Inspired by manifold1.com
   ============================================ */

:root {
  --white: #ffffff;
  --off-white: #fafafa;
  --light-gray: #f5f5f5;
  --mid-gray: #e0e0e0;
  --text-gray: #666666;
  --dark-gray: #333333;
  --black: #1a1a1a;
  --accent: #8b7355;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Georgia', 'Times New Roman', serif;
  background: var(--white);
  color: var(--black);
  line-height: 1.7;
  font-size: 18px;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 25px 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--white);
  z-index: 1000;
  border-bottom: 1px solid var(--mid-gray);
}

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

.nav__logo-icon {
  width: 40px;
  height: 40px;
}

.nav__logo-icon svg {
  width: 100%;
  height: 100%;
}

.nav__links {
  display: flex;
  gap: 40px;
}

.nav__link {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--dark-gray);
  transition: color 0.2s;
}

.nav__link:hover {
  color: var(--black);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 40px 80px;
  background: var(--white);
}

.hero__definition {
  font-size: 28px;
  font-style: italic;
  margin-bottom: 40px;
  color: var(--black);
}

.hero__definition span {
  font-style: normal;
  color: var(--text-gray);
}

.hero__title {
  font-family: 'Georgia', serif;
  font-size: clamp(48px, 8vw, 80px);
  font-weight: 400;
  letter-spacing: -1px;
  margin-bottom: 30px;
  color: var(--black);
}

.hero__subtitle {
  font-size: 20px;
  color: var(--text-gray);
  max-width: 600px;
  margin-bottom: 50px;
  line-height: 1.8;
}

.hero__meta {
  display: flex;
  gap: 60px;
  margin-bottom: 50px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero__meta-item {
  text-align: center;
}

.hero__meta-label {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-gray);
  margin-bottom: 8px;
}

.hero__meta-value {
  font-size: 18px;
  color: var(--black);
}

.hero__cta {
  display: inline-block;
  padding: 16px 40px;
  background: var(--black);
  color: var(--white);
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: all 0.3s ease;
}

.hero__cta:hover {
  background: var(--dark-gray);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: 100px 40px;
  max-width: 900px;
  margin: 0 auto;
}

.section--wide {
  max-width: 1200px;
}

.section--full {
  max-width: 100%;
  padding: 100px 60px;
}

.section--gray {
  background: var(--light-gray);
  max-width: 100%;
  padding: 100px 60px;
}

.section__header {
  text-align: center;
  margin-bottom: 60px;
}

.section__label {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-gray);
  margin-bottom: 20px;
}

.section__title {
  font-family: 'Georgia', serif;
  font-size: 36px;
  font-weight: 400;
  margin-bottom: 20px;
  color: var(--black);
}

.section__subtitle {
  font-size: 18px;
  color: var(--text-gray);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ============================================
   ABOUT / MISSION
   ============================================ */
.about {
  border-top: 1px solid var(--mid-gray);
  padding-top: 80px;
}

.about__intro {
  font-size: 24px;
  line-height: 1.8;
  margin-bottom: 40px;
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.about__text {
  columns: 2;
  column-gap: 60px;
  font-size: 17px;
  line-height: 1.9;
  color: var(--dark-gray);
}

.about__text p {
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  .about__text {
    columns: 1;
  }
}

/* ============================================
   HOST SECTION
   ============================================ */
.host {
  display: flex;
  gap: 60px;
  align-items: flex-start;
  border-top: 1px solid var(--mid-gray);
  padding-top: 60px;
}

.host__photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--light-gray);
  flex-shrink: 0;
  overflow: hidden;
}

.host__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.host__info h3 {
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 8px;
}

.host__info h4 {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-gray);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.host__info p {
  font-size: 17px;
  line-height: 1.9;
  color: var(--dark-gray);
}

.host__links {
  margin-top: 20px;
}

.host__links a {
  color: var(--black);
  text-decoration: underline;
  margin-right: 20px;
}

@media (max-width: 768px) {
  .host {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

/* ============================================
   PARTNERS
   ============================================ */
.partners {
  display: flex;
  justify-content: center;
  gap: 80px;
  margin-top: 60px;
  padding-top: 60px;
  border-top: 1px solid var(--mid-gray);
}

.partner {
  text-align: center;
}

.partner__name {
  font-size: 24px;
  font-weight: 400;
  margin-bottom: 8px;
}

.partner__role {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 12px;
  color: var(--text-gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ============================================
   SPEAKERS GRID
   ============================================ */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.speaker {
  text-align: center;
}

.speaker__photo {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background: var(--light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Georgia', serif;
  font-size: 24px;
  color: var(--text-gray);
  border: 2px solid var(--mid-gray);
  transition: all 0.3s ease;
  overflow: hidden;
  position: relative;
}

.speaker__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}

.speaker:hover .speaker__photo {
  border-color: var(--black);
  transform: scale(1.05);
}

.speaker__name {
  font-size: 16px;
  font-weight: 400;
  margin-bottom: 4px;
  color: var(--black);
}

.speaker__expertise {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 12px;
  color: var(--text-gray);
}

/* ============================================
   SCHEDULE
   ============================================ */
.schedule {
  max-width: 800px;
  margin: 0 auto;
}

.schedule__day {
  margin-bottom: 60px;
}

.schedule__day-header {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 30px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--black);
}

.schedule__day-name {
  font-size: 28px;
  font-weight: 400;
}

.schedule__day-date {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  color: var(--text-gray);
}

.schedule__item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 30px;
  padding: 20px 0;
  border-bottom: 1px solid var(--mid-gray);
}

.schedule__time {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-gray);
}

.schedule__title {
  font-size: 17px;
  font-weight: 400;
  margin-bottom: 4px;
  color: var(--black);
}

.schedule__speakers {
  font-size: 15px;
  color: var(--text-gray);
  font-style: italic;
}

.schedule__track {
  display: inline-block;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  margin-top: 8px;
  background: var(--light-gray);
  color: var(--text-gray);
}

.schedule__track--frontier {
  background: #e8f4e8;
  color: #2d5a2d;
}

.schedule__track--world {
  background: #e8f0f8;
  color: #2d4a5a;
}

.schedule__track--special {
  background: #f8f0e8;
  color: #5a4a2d;
}

/* ============================================
   EXPERIENCE CARDS
   ============================================ */
.experience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
}

@media (max-width: 900px) {
  .experience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .experience-grid {
    grid-template-columns: 1fr;
  }
}

.experience-card {
  padding: 30px;
  border: 1px solid var(--mid-gray);
  transition: all 0.3s ease;
}

.experience-card:hover {
  border-color: var(--black);
}

.experience-card__title {
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 12px;
}

.experience-card__text {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.7;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta {
  text-align: center;
  padding: 100px 40px;
  background: var(--black);
  color: var(--white);
}

.cta__title {
  font-size: 32px;
  font-weight: 400;
  margin-bottom: 20px;
}

.cta__text {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 40px;
}

.cta__button {
  display: inline-block;
  padding: 16px 50px;
  background: var(--white);
  color: var(--black);
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: all 0.3s ease;
}

.cta__button:hover {
  background: var(--light-gray);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 60px 40px;
  text-align: center;
  border-top: 1px solid var(--mid-gray);
}

.footer__logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  margin-bottom: 20px;
}

.footer__logo {
  font-size: 18px;
  color: var(--text-gray);
}

.footer__divider {
  width: 1px;
  height: 20px;
  background: var(--mid-gray);
}

.footer__text {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 13px;
  color: var(--text-gray);
}

.footer__text a {
  color: var(--black);
  text-decoration: underline;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .nav {
    padding: 20px 25px;
  }

  .nav__links {
    display: none;
  }

  .hero {
    padding: 100px 25px 60px;
  }

  .hero__meta {
    gap: 30px;
  }

  .section {
    padding: 60px 25px;
  }

  .section--full,
  .section--gray {
    padding: 60px 25px;
  }

  .partners {
    flex-direction: column;
    gap: 40px;
  }

  .schedule__item {
    grid-template-columns: 70px 1fr;
    gap: 15px;
  }
}