:root {
  --pote-header-height: 72px;
  --pote-header-offset: 72px;
  --pote-header-bg: rgba(255, 255, 255, 0.88);
  --pote-header-line: #d8e6f8;
  --pote-header-text: #2b3a53;
  --pote-header-muted: #5f7394;
  --pote-header-brand: #2f74ff;
  --pote-header-accent: #1fbf9f;
  --pote-header-shadow: 0 12px 28px rgba(47, 116, 255, 0.14);
  --pote-header-radius: 18px;
}

body.pote-has-header {
  padding-top: var(--pote-header-offset, var(--pote-header-height));
}

body.pote-menu-open {
  overflow: hidden;
}

.pote-site-header {
  position: fixed !important;
  top: 0 !important;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  padding-left: max(0.5rem, env(safe-area-inset-left));
  padding-right: max(0.5rem, env(safe-area-inset-right));
  z-index: 12000;
  background: linear-gradient(160deg, rgba(248, 252, 255, 0.94), rgba(237, 246, 255, 0.92));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--pote-header-line);
  box-shadow: var(--pote-header-shadow);
}

.pote-site-header--member,
.pote-site-header--detail {
  background: linear-gradient(160deg, rgba(250, 253, 255, 0.95), rgba(235, 246, 255, 0.92));
}

.pote-site-header__inner {
  width: min(1100px, 100%);
  margin: 0 auto;
  min-height: var(--pote-header-height);
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr) auto auto auto;
  gap: 0.55rem;
  align-items: center;
}

.pote-site-header__back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid #cfe0fb;
  text-decoration: none;
  color: var(--pote-header-text);
  background: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.pote-site-header__back-spacer {
  width: 36px;
  height: 36px;
}

.pote-site-header__back,
.pote-site-header__back-spacer {
  grid-column: 1;
}

.pote-site-header__back:hover {
  transform: translateX(-1px);
  border-color: #9ec4ff;
}

.pote-site-header__brand {
  grid-column: 2;
  text-decoration: none;
  color: var(--pote-header-brand);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1.02rem;
  line-height: 1.1;
  margin: 0;
  white-space: nowrap;
}

.pote-site-header__title {
  grid-column: 3;
  color: var(--pote-header-text);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
  max-width: min(30vw, 360px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pote-site-header__nav {
  grid-column: 4;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  flex-wrap: nowrap;
  min-width: 0;
  gap: 0.3rem;
}

.pote-site-header__link {
  text-decoration: none;
  color: var(--pote-header-muted);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.15;
  border-radius: 999px;
  padding: 0.42rem 0.72rem;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease;
}

.pote-site-header__link:hover {
  background: #eaf3ff;
  color: #345786;
}

.pote-site-header__action {
  grid-column: 5;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.1;
  border-radius: 999px;
  padding: 0.45rem 0.88rem;
  color: #fff;
  background: linear-gradient(135deg, #2f74ff, #1fbf9f);
  white-space: nowrap;
  box-shadow: 0 8px 14px rgba(47, 116, 255, 0.24);
}

.pote-site-header__toggle {
  grid-column: 6;
  justify-self: end;
  appearance: none;
  border: 1px solid #cfe0fb;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: #fff;
  color: #2f74ff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.pote-site-header__toggle:hover {
  border-color: #9ec4ff;
}

.pote-site-header__bars {
  width: 17px;
  height: 12px;
  position: relative;
}

.pote-site-header__bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: #2f74ff;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.pote-site-header__bars span:nth-child(1) {
  top: 0;
}

.pote-site-header__bars span:nth-child(2) {
  top: 5px;
}

.pote-site-header__bars span:nth-child(3) {
  top: 10px;
}

.pote-site-header__toggle[aria-expanded='true'] .pote-site-header__bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.pote-site-header__toggle[aria-expanded='true'] .pote-site-header__bars span:nth-child(2) {
  opacity: 0;
}

.pote-site-header__toggle[aria-expanded='true'] .pote-site-header__bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.pote-site-header__overlay {
  position: fixed;
  inset: 0;
  z-index: 11999;
  background:
    radial-gradient(920px 500px at 85% -10%, rgba(47, 116, 255, 0.13), transparent 62%),
    radial-gradient(780px 460px at -5% 0%, rgba(31, 191, 159, 0.12), transparent 62%),
    rgba(244, 250, 255, 0.97);
  backdrop-filter: blur(6px);
  padding: 6.8rem 1rem 1.6rem;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.pote-site-header__overlay[hidden] {
  display: none;
}

.pote-site-header__overlay-card {
  width: min(560px, 100%);
  border: 1px solid #d3e4fb;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 18px 36px rgba(47, 116, 255, 0.16);
  padding: 1rem;
}

.pote-site-header__overlay-title {
  font-size: 0.78rem;
  color: #5f7394;
  letter-spacing: 0.06em;
  line-height: 1.25;
  margin: 0 0 0.65rem;
  text-transform: uppercase;
}

.pote-site-header__overlay-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.48rem;
}

.pote-site-header__overlay-link {
  text-decoration: none;
  display: block;
  border: 1px solid #d9e8fb;
  border-radius: 12px;
  background: #fff;
  color: #2f466b;
  padding: 0.66rem 0.78rem;
  font-size: 0.9rem;
  font-weight: 700;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.pote-site-header__overlay-link:hover {
  border-color: #9ec4ff;
  transform: translateY(-1px);
}

.pote-site-header__overlay-note {
  margin: 0.8rem 0 0;
  line-height: 1.45;
  font-size: 0.76rem;
  color: #6b80a2;
}

@media (max-width: 960px) {
  .pote-site-header__inner {
    grid-template-columns: auto auto minmax(0, 1fr) auto auto;
  }

  .pote-site-header__nav {
    display: none;
  }

  .pote-site-header__title {
    max-width: min(34vw, 220px);
  }

  .pote-site-header__action {
    grid-column: 4;
  }

  .pote-site-header__toggle {
    grid-column: 5;
  }
}

@media (max-width: 780px) {
  .pote-site-header__inner {
    grid-template-columns: auto minmax(0, 1fr) auto auto;
  }

  .pote-site-header__title {
    display: none;
  }

  .pote-site-header__brand {
    grid-column: 2;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .pote-site-header__action {
    grid-column: 3;
  }

  .pote-site-header__toggle {
    grid-column: 4;
  }
}

@media (max-width: 640px) {
  :root {
    --pote-header-height: 64px;
    --pote-header-offset: 64px;
  }

  .pote-site-header {
    padding-left: max(0.35rem, env(safe-area-inset-left));
    padding-right: max(0.35rem, env(safe-area-inset-right));
  }

  .pote-site-header__inner {
    grid-template-columns: 36px minmax(0, 1fr) 38px;
    gap: 0.42rem;
  }

  .pote-site-header__brand {
    grid-column: 2;
    justify-self: center;
    font-size: 0.95rem;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .pote-site-header__title {
    display: none;
  }

  .pote-site-header__action {
    display: none;
  }

  .pote-site-header__toggle {
    grid-column: 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pote-site-header *,
  .pote-site-header__overlay-link {
    transition: none !important;
  }
}