/* =========================
   Reset
========================= */

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

html {
  scroll-behavior: smooth;
}

body {
  background: #ffffff;
  color: #111111;

  font-family:
    -apple-system, BlinkMacSystemFont, 'Pretendard', 'Noto Sans KR',
    'Helvetica Neue', Arial, sans-serif;

  line-height: 1.6;

  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font: inherit;
}

section {
  width: 100%;
  max-width: 1400px;

  margin: 0 auto;

  padding: 160px 60px;
}

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

.header {
  position: fixed;

  top: 0;
  left: 0;

  width: 100%;
  height: 90px;

  padding: 0 60px;

  display: flex;
  align-items: center;
  justify-content: space-between;

  background: rgba(255, 255, 255, 0.92);

  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);

  border-bottom: 1px solid rgba(0, 0, 0, 0.06);

  z-index: 100;
}

.logo {
  font-size: 21px;

  font-weight: 700;

  letter-spacing: -0.5px;
}

/* =========================
   Desktop Navigation
========================= */

.desktop-nav {
  display: flex;

  align-items: center;

  gap: 34px;
}

.desktop-nav a {
  position: relative;

  color: #777777;

  font-size: 12px;

  font-weight: 600;

  letter-spacing: 1.5px;

  transition: color 0.25s ease;
}

.desktop-nav a::after {
  content: '';

  position: absolute;

  left: 0;
  bottom: -7px;

  width: 0;
  height: 1px;

  background: #111111;

  transition: width 0.25s ease;
}

.desktop-nav a:hover {
  color: #111111;
}

.desktop-nav a:hover::after {
  width: 100%;
}

/* =========================
   Mobile Menu Button
========================= */

.menu-toggle {
  display: none;

  width: 42px;
  height: 42px;

  padding: 8px;

  border: 0;

  background: transparent;

  cursor: pointer;

  flex-direction: column;
  justify-content: center;

  gap: 5px;
}

.menu-toggle span {
  display: block;

  width: 100%;
  height: 2px;

  background: #111111;

  transition:
    transform 0.25s ease,
    opacity 0.25s ease;
}

/* =========================
   Mobile Menu
========================= */

.mobile-menu {
  position: fixed;

  top: 0;
  right: 0;

  width: 100%;
  height: 100vh;

  padding: 25px;

  background: #ffffff;

  z-index: 200;

  transform: translateX(100%);

  transition: transform 0.35s ease;

  visibility: hidden;
}

/* Mobile Menu Open */

.mobile-menu.active {
  transform: translateX(0);

  visibility: visible;
}

.mobile-menu-close {
  display: block;

  margin-left: auto;

  width: 42px;
  height: 42px;

  border: 0;

  background: transparent;

  color: #111111;

  font-size: 38px;

  font-weight: 300;

  line-height: 1;

  cursor: pointer;
}

.mobile-menu nav {
  margin-top: 75px;

  display: flex;

  flex-direction: column;

  gap: 25px;
}

.mobile-menu nav a {
  font-size: 42px;

  font-weight: 600;

  letter-spacing: -2px;

  transition: opacity 0.2s ease;
}

.mobile-menu nav a:hover {
  opacity: 0.5;
}

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

.hero {
  min-height: 100vh;

  padding-top: 150px;

  display: grid;

  grid-template-columns:
    minmax(0, 1fr)
    360px;

  align-items: center;

  gap: 80px;
}

.hero-content {
  min-width: 0;
}

.hero-subtitle {
  margin-bottom: 30px;

  color: #777777;

  font-size: 13px;

  font-weight: 600;

  letter-spacing: 3px;
}

.hero h1 {
  font-size: clamp(80px, 12vw, 180px);

  line-height: 0.82;

  font-weight: 700;

  letter-spacing: -9px;
}

.hero h2 {
  margin-top: 25px;

  font-size: clamp(55px, 7vw, 105px);

  line-height: 1;

  font-weight: 400;

  letter-spacing: -5px;
}

.hero-description {
  max-width: 650px;

  margin-top: 50px;

  color: #555555;

  font-size: 18px;

  line-height: 1.85;
}

.hero-actions {
  margin-top: 40px;

  display: flex;

  gap: 12px;

  flex-wrap: wrap;
}

.hero-actions a {
  display: inline-flex;

  align-items: center;
  justify-content: center;

  min-height: 48px;

  padding: 13px 26px;

  border: 1px solid #222222;

  border-radius: 999px;

  font-size: 12px;

  font-weight: 600;

  letter-spacing: 0.5px;

  transition:
    background 0.25s ease,
    color 0.25s ease,
    transform 0.25s ease;
}

.hero-actions a:hover {
  background: #111111;

  color: #ffffff;

  transform: translateY(-2px);
}

/* =========================
   Profile
========================= */

.hero-profile {
  position: relative;

  width: 100%;
  height: 500px;
}

.profile-image {
  position: absolute;

  overflow: hidden;

  background: #eeeeee;

  border-radius: 24px;
}

.profile-image img {
  width: 100%;
  height: 100%;

  object-fit: cover;
}

.profile-image-main {
  top: 0;
  right: 0;

  width: 290px;
  height: 390px;

  transform: rotate(3deg);
}

.profile-image-secondary {
  right: 190px;
  bottom: 0;

  width: 190px;
  height: 240px;

  border: 8px solid #ffffff;

  transform: rotate(-7deg);
}

/* =========================
   Common Section
========================= */

.section-label {
  margin-bottom: 28px;

  color: #888888;

  font-size: 11px;

  font-weight: 600;

  letter-spacing: 4px;
}

section h2 {
  margin-bottom: 55px;

  font-size: clamp(52px, 7vw, 90px);

  line-height: 1;

  font-weight: 600;

  letter-spacing: -5px;
}

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

.about-intro {
  max-width: 760px;

  color: #555555;

  font-size: 20px;

  line-height: 1.9;
}

.value-container {
  margin-top: 100px;

  display: grid;

  grid-template-columns: repeat(3, 1fr);

  gap: 45px;
}

.value-container article {
  padding-top: 28px;

  border-top: 1px solid #dddddd;
}

.value-number {
  display: block;

  margin-bottom: 25px;

  color: #bbbbbb;

  font-size: 12px;

  letter-spacing: 2px;
}

.value-container h3 {
  margin-bottom: 18px;

  font-size: 30px;

  font-weight: 600;

  letter-spacing: -1px;
}

.value-container p {
  color: #777777;

  font-size: 16px;

  line-height: 1.8;
}

/* =========================
   Journey
========================= */

.timeline {
  display: flex;

  flex-direction: column;

  gap: 85px;
}

.timeline article {
  display: grid;

  grid-template-columns: 120px minmax(0, 700px);

  gap: 20px;
}

.timeline-number {
  color: #cccccc;

  font-size: 50px;

  font-weight: 600;

  line-height: 1;
}

.timeline h3 {
  margin-bottom: 15px;

  font-size: 40px;

  font-weight: 600;

  letter-spacing: -2px;
}

.timeline p {
  color: #777777;

  font-size: 17px;

  line-height: 1.8;
}

/* =========================
   Experience
========================= */

.experience-grid {
  display: grid;

  grid-template-columns: repeat(3, 1fr);

  gap: 24px;
}

.experience-grid article {
  min-height: 310px;

  padding: 38px;

  background: #f7f7f7;

  border: 1px solid #eeeeee;

  border-radius: 20px;

  transition:
    transform 0.3s ease,
    background 0.3s ease;
}

.experience-grid article:hover {
  transform: translateY(-6px);

  background: #f2f2f2;
}

.card-number {
  display: block;

  margin-bottom: 40px;

  color: #aaaaaa;

  font-size: 12px;

  letter-spacing: 2px;
}

.experience-grid h3 {
  margin-bottom: 18px;

  font-size: 30px;

  font-weight: 600;

  letter-spacing: -1px;
}

.experience-grid p {
  color: #666666;

  font-size: 16px;

  line-height: 1.8;
}

/* =========================
   Projects
========================= */

.project-card {
  padding: 60px 0;

  border-top: 1px solid #dddddd;
}

.project-card:last-child {
  border-bottom: 1px solid #dddddd;
}

.project-meta {
  margin-bottom: 20px;

  color: #999999;

  font-size: 11px;

  font-weight: 600;

  letter-spacing: 3px;
}

.project-card h3 {
  margin-bottom: 20px;

  font-size: clamp(42px, 6vw, 72px);

  line-height: 1;

  font-weight: 600;

  letter-spacing: -4px;
}

.project-card p {
  max-width: 760px;

  color: #666666;

  font-size: 18px;

  line-height: 1.8;
}

/* =========================
   Contact
========================= */

.contact {
  min-height: 75vh;

  display: flex;

  flex-direction: column;

  justify-content: center;
}

.contact-description {
  max-width: 650px;

  color: #666666;

  font-size: 20px;

  line-height: 1.8;
}

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

footer {
  padding: 45px 60px;

  border-top: 1px solid #eeeeee;

  display: flex;

  align-items: center;
  justify-content: space-between;

  color: #999999;

  font-size: 11px;

  letter-spacing: 1px;
}

/* =========================
   Tablet
========================= */

@media screen and (max-width: 1000px) {
  .header {
    padding: 0 35px;
  }

  section {
    padding: 130px 35px;
  }

  .hero {
    grid-template-columns: 1fr;

    gap: 60px;

    padding-top: 140px;
  }

  .hero-profile {
    height: 400px;

    max-width: 500px;
  }

  .value-container {
    grid-template-columns: 1fr;
  }

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

/* =========================
   Mobile
========================= */

@media screen and (max-width: 768px) {
  section {
    padding: 105px 25px;
  }

  /* Header */

  .header {
    height: 75px;

    padding: 0 25px;
  }

  .logo {
    font-size: 18px;
  }

  .desktop-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  /* Mobile Menu */

  .mobile-menu {
    height: 100dvh;

    padding: 20px 25px;
  }

  .mobile-menu.active {
    transform: translateX(0);
  }

  /* Hero */

  .hero {
    min-height: 100svh;

    display: flex;

    flex-direction: column;

    justify-content: center;

    align-items: flex-start;

    gap: 50px;

    padding-top: 110px;
  }

  .hero-subtitle {
    margin-bottom: 22px;

    font-size: 10px;

    letter-spacing: 2px;
  }

  .hero h1 {
    font-size: 72px;

    letter-spacing: -5px;
  }

  .hero h2 {
    margin-top: 16px;

    font-size: 52px;

    letter-spacing: -3px;
  }

  .hero-description {
    margin-top: 35px;

    font-size: 16px;

    line-height: 1.85;
  }

  .hero-actions {
    margin-top: 30px;
  }

  .hero-actions a {
    min-height: 45px;

    padding: 11px 21px;

    font-size: 11px;
  }

  /* Profile */

  .hero-profile {
    width: 100%;

    max-width: 360px;

    height: 300px;

    margin: 0 auto;
  }

  .profile-image-main {
    width: 210px;
    height: 280px;

    right: 0;
  }

  .profile-image-secondary {
    width: 150px;
    height: 190px;

    right: 130px;

    border-width: 6px;
  }

  /* Common */

  .section-label {
    margin-bottom: 22px;

    font-size: 10px;

    letter-spacing: 3px;
  }

  section h2 {
    margin-bottom: 40px;

    font-size: 50px;

    letter-spacing: -4px;
  }

  /* About */

  .about-intro {
    font-size: 17px;

    line-height: 1.85;
  }

  .value-container {
    margin-top: 65px;

    grid-template-columns: 1fr;

    gap: 55px;
  }

  .value-container h3 {
    font-size: 27px;
  }

  /* Journey */

  .timeline {
    gap: 65px;
  }

  .timeline article {
    grid-template-columns: 1fr;

    gap: 12px;
  }

  .timeline-number {
    font-size: 32px;
  }

  .timeline h3 {
    font-size: 32px;

    letter-spacing: -1px;
  }

  .timeline p {
    font-size: 16px;
  }

  /* Experience */

  .experience-grid {
    grid-template-columns: 1fr;

    gap: 15px;
  }

  .experience-grid article {
    min-height: auto;

    padding: 30px;
  }

  .card-number {
    margin-bottom: 30px;
  }

  .experience-grid h3 {
    font-size: 27px;
  }

  /* Projects */

  .project-card {
    padding: 45px 0;
  }

  .project-card h3 {
    font-size: 42px;

    letter-spacing: -2px;
  }

  .project-card p {
    font-size: 16px;
  }

  /* Contact */

  .contact {
    min-height: 70vh;
  }

  .contact-description {
    font-size: 17px;
  }

  /* Footer */

  footer {
    padding: 40px 25px;

    flex-direction: column;

    align-items: flex-start;

    gap: 10px;

    font-size: 10px;
  }

  /* Mobile Navigation */

  .mobile-menu nav {
    margin-top: 65px;

    gap: 23px;
  }

  .mobile-menu nav a {
    font-size: 36px;

    letter-spacing: -2px;
  }
}

/* =========================
   Small Mobile
========================= */

@media screen and (max-width: 420px) {
  .hero h1 {
    font-size: 60px;
  }

  .hero h2 {
    font-size: 45px;
  }

  section h2 {
    font-size: 44px;
  }

  .hero-profile {
    height: 260px;
  }

  .profile-image-main {
    width: 185px;
    height: 245px;
  }

  .profile-image-secondary {
    width: 135px;
    height: 175px;

    right: 110px;
  }

  .mobile-menu nav a {
    font-size: 32px;
  }
}