* {
  box-sizing: border-box;
}

:root {
  --ink: #173526;
  --muted-ink: #56655b;
  --paper: #e9eee9;
  --panel: #eaf1e7;
  --accent: #2f7a51;
  --scroll-progress: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 180vh;
  font-family: Arial, "Noto Sans KR", sans-serif;
  background: var(--paper);
  color: #242529;
}

.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10;
  width: 100%;
  height: var(--header-height, 50vh);
  overflow: hidden;
  border-bottom-right-radius: var(--bar-radius, 0px);
  border-bottom-left-radius: var(--bar-radius, 0px);
  background: var(--panel);
}

.header-spacer {
  height: 50vh;
  min-height: 280px;
  background: var(--panel);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--brand-gap, clamp(16px, 2.4vw, 34px));
  position: absolute;
  left: var(--brand-left, 50%);
  top: var(--brand-top, 42%);
  z-index: 2;
  transform: translate(var(--brand-translate-x, -50%), -50%);
}

.brand-logo {
  width: var(--logo-size, clamp(68px, 8vw, 124px));
  height: var(--logo-size, clamp(68px, 8vw, 124px));
  object-fit: contain;
  filter: drop-shadow(0 10px 22px rgba(23, 53, 38, 0.10));
}

h1 {
  margin: 0;
  max-width: var(--title-max-width, 520px);
  overflow: hidden;
  opacity: var(--title-opacity, 1);
  text-align: center;
  font-size: var(--title-size, clamp(48px, 5.4vw, 86px));
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: 0;
  color: var(--ink);
  white-space: nowrap;
  text-shadow: 0 10px 30px rgba(23, 53, 38, 0.08);
}

.curved-loop {
  position: absolute;
  left: var(--loop-left, 50%);
  top: 70%;
  z-index: 2;
  width: var(--loop-width, min(620px, calc(100% - 48px)));
  overflow: hidden;
  transform: translateY(calc(-50% - (var(--scroll-progress, 0) * 18px)));
  opacity: calc((1 - var(--scroll-progress, 0)) * (1 - var(--scroll-progress, 0)));
  pointer-events: none;
}

.curved-loop svg {
  display: block;
  width: 100%;
  aspect-ratio: 100 / 12;
  overflow: visible;
  user-select: none;
  fill: rgba(70, 85, 76, 0.72);
  font-size: clamp(24px, 3.2vw, 46px);
  font-weight: 900;
  text-transform: uppercase;
}

.header-actions {
  position: absolute;
  top: 50%;
  right: 22px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-50%);
  transition: opacity 180ms ease;
}

.is-scrolled .header-actions {
  opacity: 1;
  pointer-events: auto;
}

.login-button,
.logout-button,
.signup-button {
  padding: 11px 16px;
  border: 1px solid rgba(23, 53, 38, 0.14);
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease;
}

.logout-button,
.user-id-label {
  display: none;
}

.logged-in .logout-button,
.logged-in .user-id-label {
  display: inline-flex;
}

.logged-in .login-button,
.logged-in .signup-button {
  display: none;
}

.user-id-label {
  align-items: center;
  max-width: 170px;
  height: 40px;
  padding: 0 12px;
  overflow: hidden;
  border: 1px solid rgba(23, 53, 38, 0.10);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.login-button:hover,
.logout-button:hover,
.signup-button:hover {
  border-color: rgba(23, 53, 38, 0.28);
  background: #f8faf7;
}

.page-space {
  min-height: 140vh;
  background: var(--paper);
}

.image-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #ffffff;
}

.slider-track {
  display: flex;
  width: 100%;
  transform: translateX(calc(var(--slide-index, 0) * -100%));
  transition: transform 720ms cubic-bezier(0.22, 1, 0.36, 1);
}

.slide {
  flex: 0 0 100%;
  background: #eef1ec;
}

.slide img {
  display: block;
  width: 100%;
  height: auto;
}

.slider-button {
  position: absolute;
  top: 50%;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.44);
  border-radius: 4px;
  background: rgba(18, 35, 26, 0.34);
  color: #ffffff;
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
  transform: translateY(-50%);
  backdrop-filter: blur(10px);
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.slider-button:hover {
  background: rgba(18, 35, 26, 0.52);
  border-color: rgba(255, 255, 255, 0.70);
}

.slider-button:active {
  transform: translateY(-50%) scale(0.96);
}

.slider-button.prev {
  left: 22px;
}

.slider-button.next {
  right: 22px;
}

.slider-dots {
  position: absolute;
  left: 50%;
  bottom: 20px;
  z-index: 2;
  display: flex;
  gap: 8px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 4px;
  background: rgba(18, 35, 26, 0.28);
  transform: translateX(-50%);
  backdrop-filter: blur(10px);
}

.slider-dot {
  width: 32px;
  height: 4px;
  padding: 0;
  border: 0;
  border-radius: 1px;
  background: rgba(255, 255, 255, 0.42);
  cursor: pointer;
  transition: background 220ms ease, width 220ms ease;
}

.slider-dot.active {
  width: 48px;
  background: #ffffff;
}

.image-slider.single .slider-button,
.image-slider.single .slider-dots {
  display: none;
}

.window-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  width: min(1380px, calc(100% - 16px));
  margin: 48px auto 80px;
}

.info-window {
  min-height: 290px;
  padding: 22px 24px;
  border: 1px solid rgba(23, 53, 38, 0.08);
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 18px 40px rgba(23, 53, 38, 0.08);
}

.info-window h2 {
  margin: 0;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(23, 53, 38, 0.12);
  color: var(--ink);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.2;
}

.signup-view,
.login-view {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(14, 24, 18, 0.36);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.signup-open .signup-view,
.login-open .login-view {
  opacity: 1;
  pointer-events: auto;
}

.signup-card,
.login-card {
  position: relative;
  width: min(420px, 100%);
  padding: 30px;
  border: 1px solid rgba(23, 53, 38, 0.10);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 28px 70px rgba(14, 24, 18, 0.20);
}

.signup-card h2,
.login-card h2 {
  margin: 0 0 22px;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.2;
}

.signup-card label,
.login-card label {
  display: block;
  margin-top: 14px;
}

.signup-card span,
.login-card span {
  display: block;
  margin-bottom: 7px;
  color: var(--muted-ink);
  font-size: 13px;
  font-weight: 800;
}

.signup-card input,
.login-card input {
  width: 100%;
  height: 44px;
  padding: 0 12px;
  border: 1px solid rgba(23, 53, 38, 0.16);
  border-radius: 6px;
  background: #f8faf7;
  color: #17251c;
  font-size: 15px;
}

.signup-card input:focus,
.login-card input:focus {
  outline: 2px solid rgba(47, 122, 81, 0.22);
  border-color: rgba(47, 122, 81, 0.48);
}

.signup-submit,
.login-submit {
  width: 100%;
  height: 46px;
  margin-top: 22px;
  border: 0;
  border-radius: 6px;
  background: var(--ink);
  color: #ffffff;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
}

.signup-close,
.login-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 6px;
  background: #f0f4ef;
  color: var(--ink);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

.signup-message,
.login-message {
  min-height: 18px;
  margin: 12px 0 0;
  color: var(--muted-ink);
  font-size: 13px;
}

@media (max-width: 700px) {
  .header-spacer {
    min-height: 240px;
  }

  .curved-loop {
    top: 72%;
  }

  .curved-loop svg {
    font-size: clamp(20px, 7vw, 32px);
  }

  .header-actions {
    right: 12px;
    gap: 6px;
  }

  .login-button,
  .logout-button,
  .signup-button {
    padding: 9px 12px;
    font-size: 13px;
  }

  .user-id-label {
    max-width: 110px;
    height: 36px;
    padding: 0 10px;
    font-size: 13px;
  }

  .slider-button {
    width: 40px;
    height: 40px;
    font-size: 26px;
  }

  .slider-button.prev {
    left: 12px;
  }

  .slider-button.next {
    right: 12px;
  }

  .slider-dots {
    bottom: 12px;
  }

  .slider-dot {
    width: 24px;
  }

  .slider-dot.active {
    width: 36px;
  }

  .window-grid {
    grid-template-columns: 1fr;
    width: min(480px, calc(100% - 16px));
    margin: 32px auto 56px;
  }

  .info-window {
    min-height: 210px;
    padding: 20px 22px;
    border-radius: 16px;
  }

  .info-window h2 {
    font-size: 19px;
  }
}