/* ========================================
   Variables & Reset
   ======================================== */

:root {
  --color-bg: #0a0a0f;
  --color-bg-alt: #0f0f18;
  --color-surface: #16162a;
  --color-surface-hover: #1e1e38;
  --color-border: rgba(139, 92, 246, 0.15);
  --color-border-subtle: rgba(255, 255, 255, 0.06);
  --color-text: #e2e2f0;
  --color-text-muted: #9494b8;
  --color-text-subtle: #6b6b8a;
  --color-primary: #8b5cf6;
  --color-primary-light: #a78bfa;
  --color-accent: #06b6d4;
  --color-gradient-1: #8b5cf6;
  --color-gradient-2: #06b6d4;
  --color-gradient-3: #ec4899;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ========================================
   Layout
   ======================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   Header
   ======================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.header--scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-subtle);
  padding: 12px 0;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 4px;
}

.logo-icon {
  color: var(--color-primary);
  font-size: 1.1rem;
}

.logo-accent {
  color: var(--color-primary-light);
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
  border-radius: 2px;
}

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

.nav__link:hover::after {
  width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: 110;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(139, 92, 246, 0.2), transparent),
    radial-gradient(ellipse 50% 40% at 80% 50%, rgba(6, 182, 212, 0.1), transparent),
    radial-gradient(ellipse 40% 50% at 10% 70%, rgba(236, 72, 153, 0.08), transparent);
  z-index: 0;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 850px;
  margin: 0 auto;
}

.hero__badge {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 100px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.25);
  color: var(--color-primary-light);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 28px;
}

.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 650px;
  margin: 0 auto 48px;
  line-height: 1.8;
}

.hero__stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 48px;
}

.stat {
  text-align: center;
}

.stat__number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.stat__label {
  font-size: 0.85rem;
  color: var(--color-text-subtle);
  font-weight: 500;
}

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  letter-spacing: 0.01em;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

/* ========================================
   Sections
   ======================================== */

.section {
  padding: 100px 0;
}

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

.section__eyebrow {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary-light);
  margin-bottom: 12px;
  text-align: center;
}

.section__title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section__desc {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 56px;
  font-size: 1.05rem;
}

/* ========================================
   About
   ======================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  margin-top: 48px;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about-text strong {
  color: var(--color-text);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.highlight-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  transition: var(--transition);
}

.highlight-card:hover {
  border-color: var(--color-border);
  transform: translateX(4px);
}

.highlight-card__icon {
  font-size: 1.8rem;
  flex-shrink: 0;
  line-height: 1;
}

.highlight-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.highlight-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.quote {
  margin-top: 8px;
  padding-left: 20px;
  border-left: 3px solid var(--color-primary);
  color: var(--color-text);
  font-style: italic;
  font-size: 1rem;
  line-height: 1.7;
}

/* uMode Stats */
.umode-stats {
  margin-top: 64px;
  padding: 40px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  text-align: center;
}

.umode-label {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 28px;
}

.umode-label strong {
  color: var(--color-text);
}

.umode-numbers {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.umode-stat {
  text-align: center;
}

.umode-stat__number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 4px;
}

.umode-stat__label {
  font-size: 0.82rem;
  color: var(--color-text-subtle);
  font-weight: 500;
}

/* ========================================
   Agenda
   ======================================== */

.agenda-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.agenda-card {
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  overflow: hidden;
  transition: var(--transition);
}

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

.agenda-card__header {
  padding: 32px 28px 24px;
  position: relative;
}

.agenda-card__header--morning {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(6, 182, 212, 0.08));
}

.agenda-card__header--afternoon {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.12), rgba(139, 92, 246, 0.1));
}

.agenda-card__period {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary-light);
  margin-bottom: 8px;
}

.agenda-card__title {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 6px;
}

.agenda-card__level {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.agenda-card__body {
  padding: 8px 0;
}

.agenda-block {
  display: flex;
  gap: 16px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.agenda-block:last-child {
  border-bottom: none;
}

.agenda-block--break {
  opacity: 0.6;
}

.agenda-block__time {
  flex-shrink: 0;
  width: 110px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary-light);
  padding-top: 2px;
}

.agenda-block__content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.3;
}

.agenda-block__content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.agenda-block__content li {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding-left: 16px;
  position: relative;
}

.agenda-block__content li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--color-primary-light);
  font-weight: 700;
}

/* ========================================
   Topics
   ======================================== */

.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.topic-card {
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.topic-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gradient-1), var(--color-gradient-2));
  opacity: 0;
  transition: var(--transition);
}

.topic-card:hover {
  border-color: var(--color-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.topic-card:hover::before {
  opacity: 1;
}

.topic-card__number {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary-light);
  background: rgba(139, 92, 246, 0.12);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.topic-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
}

.topic-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========================================
   Cases
   ======================================== */

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.case-card {
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  transition: var(--transition);
}

.case-card:hover {
  border-color: var(--color-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.case-card__icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
  line-height: 1;
}

.case-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}

.case-card__desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.case-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.case-card--wide {
  grid-column: 1 / -1;
}

.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--color-primary-light);
  font-size: 0.78rem;
  font-weight: 600;
}

/* ========================================
   Participants
   ======================================== */

.participants-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.participant-card {
  padding: 32px 20px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  text-align: center;
  transition: var(--transition);
}

.participant-card:hover {
  border-color: var(--color-border);
  transform: translateY(-2px);
}

.participant-card__logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* ========================================
   FAQ
   ======================================== */

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--color-border);
}

.faq-item__question {
  width: 100%;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: var(--transition);
}

.faq-item__question:hover {
  color: var(--color-primary-light);
}

.faq-item__icon {
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-primary-light);
  transition: var(--transition);
  flex-shrink: 0;
  line-height: 1;
}

.faq-item.active .faq-item__icon {
  transform: rotate(45deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item__answer p {
  padding: 0 28px 22px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ========================================
   Closing Quote
   ======================================== */

.closing {
  padding: 100px 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(139, 92, 246, 0.12), transparent);
}

.closing__content {
  text-align: center;
  max-width: 750px;
  margin: 0 auto;
}

.closing__quote {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.closing__author {
  margin-top: 24px;
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ========================================
   Footer
   ======================================== */

.footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-subtle);
  padding: 64px 0 0;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer__tagline {
  color: var(--color-text-subtle);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 300px;
  line-height: 1.6;
}

.footer__links h4,
.footer__contact h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer__links a {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 4px 0;
  transition: var(--transition);
}

.footer__links a:hover {
  color: var(--color-primary-light);
  transform: translateX(4px);
}

.footer__contact p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 2px 0;
}

.footer__bottom {
  border-top: 1px solid var(--color-border-subtle);
  padding: 20px 0;
}

.footer__bottom p {
  font-size: 0.82rem;
  color: var(--color-text-subtle);
  text-align: center;
}

/* ========================================
   Reveal Animation
   ======================================== */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 1024px) {
  .topics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .participants-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

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

  .nav {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 105;
  }

  .nav.open {
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    font-size: 1.4rem;
    font-weight: 600;
  }

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero__stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .stat__number {
    font-size: 2rem;
  }

  .section {
    padding: 72px 0;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

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

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero__title {
    font-size: clamp(1.8rem, 6vw, 2.6rem);
  }

  .agenda-block {
    flex-direction: column;
    gap: 4px;
  }

  .agenda-block__time {
    width: auto;
  }

  .umode-numbers {
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero__stats {
    gap: 16px;
  }

  .stat__number {
    font-size: 1.6rem;
  }

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

  .topic-card,
  .case-card {
    padding: 24px 20px;
  }

  .faq-item__question {
    padding: 18px 20px;
    font-size: 0.95rem;
  }

  .faq-item__answer p {
    padding: 0 20px 18px;
  }
}