/* OW Portal — Instagram-inspired hub
   Tokens from design-system/ow-portal/pages/portal.md */

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --ink: #262626;
  --muted: #8e8e8e;
  --line: #dbdbdb;
  --cta: #0095f6;
  --cta-hover: #1877f2;
  --ring-1: #f58529;
  --ring-2: #dd2a7b;
  --ring-3: #8134af;
  --story-gradient: conic-gradient(
    from 210deg,
    var(--ring-1),
    var(--ring-2),
    var(--ring-3),
    #515bd4,
    var(--ring-1)
  );

  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Figtree", system-ui, sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --shadow-soft: 0 8px 28px rgba(38, 38, 38, 0.08);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 220ms;
  --dur-enter: 280ms;

  --topbar-h: 64px;
  --mobile-nav-h: 72px;
  --z-topbar: 50;
  --z-toast: 100;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(221, 42, 123, 0.06), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(245, 133, 41, 0.07), transparent 50%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
}

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

button {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -100px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: #fff;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-3);
  outline: 3px solid var(--cta);
  outline-offset: 2px;
}

/* ——— Top bar ——— */
.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-topbar);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  min-height: var(--mobile-nav-h);
  padding: calc(6px + env(safe-area-inset-top, 0px)) max(8px, env(safe-area-inset-right))
    6px max(8px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(14px);
  -webkit-backdrop-filter: saturate(1.2) blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  cursor: pointer;
}

.brand__ring {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--story-gradient);
  padding: 2px;
  animation: ring-spin 8s linear infinite;
}

.brand__avatar {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--surface);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.brand__tag {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 500;
}

.topbar__nav {
  display: none;
  align-items: center;
  gap: 4px;
}

.topbar__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition:
    color var(--dur) var(--ease-out),
    background var(--dur) var(--ease-out),
    transform var(--dur) var(--ease-out);
}

.topbar__link svg {
  flex-shrink: 0;
  opacity: 0.72;
  transition:
    opacity var(--dur) var(--ease-out),
    color var(--dur) var(--ease-out);
}

.topbar__link:hover,
.topbar__link.is-active {
  color: var(--ink);
  background: color-mix(in srgb, var(--line) 35%, transparent);
}

.topbar__link:hover svg,
.topbar__link.is-active svg {
  opacity: 1;
  color: var(--ring-2);
}

.topbar__link:focus-visible,
.brand:focus-visible,
.story-chip:focus-visible,
.portal__link:focus-visible,
.bottom-nav__item:focus-visible {
  outline: 3px solid var(--cta);
  outline-offset: 3px;
}

/* ——— Hero ——— */
.hero {
  width: min(720px, calc(100% - 32px));
  margin: var(--space-5) auto var(--space-4);
  text-align: center;
}

.hero__eyebrow {
  margin: 0 0 10px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
  transform: translateY(10px);
  animation: rise var(--dur-enter) var(--ease-out) 80ms forwards;
}

.hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 14vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.9;
  background: linear-gradient(
    120deg,
    var(--ink) 20%,
    var(--ring-2) 48%,
    var(--ring-1) 72%,
    var(--ink) 100%
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation:
    rise var(--dur-enter) var(--ease-out) 120ms forwards,
    shimmer 8s ease-in-out 600ms infinite;
  opacity: 0;
  transform: translateY(12px);
}

.hero__sub {
  margin: 14px auto 0;
  max-width: 36ch;
  color: var(--muted);
  font-size: 1.05rem;
  opacity: 0;
  transform: translateY(10px);
  animation: rise var(--dur-enter) var(--ease-out) 180ms forwards;
}

/* ——— Story strip (mobile quick nav) ——— */
.story-strip {
  display: flex;
  justify-content: center;
  gap: 20px;
  width: min(520px, calc(100% - 24px));
  margin: 0 auto var(--space-4);
  padding: 4px 0;
}

.story-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 64px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  animation: rise var(--dur-enter) var(--ease-out) forwards;
}

.story-chip:nth-child(1) {
  animation-delay: 220ms;
}
.story-chip:nth-child(2) {
  animation-delay: 280ms;
}
.story-chip:nth-child(3) {
  animation-delay: 340ms;
}

.story-chip__ring {
  display: grid;
  place-items: center;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  padding: 2.5px;
  background: var(--story-gradient);
  transition: transform var(--dur) var(--ease-out);
}

.story-chip:hover .story-chip__ring,
.story-chip:active .story-chip__ring {
  transform: scale(0.96);
}

.story-chip.is-active .story-chip__ring {
  animation: ring-spin 4s linear infinite;
}

.story-chip__face {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 3px solid var(--bg);
  color: #fff;
}

.story-chip__face--Interactive,
.story-chip__face--quiz {
  background: linear-gradient(145deg, #ff8a65, #e91e63);
}
.story-chip__face--games {
  background: linear-gradient(145deg, #7c4dff, #536dfe);
}
.story-chip__face--story {
  background: linear-gradient(145deg, #ffb300, #ff6f00);
}

.story-chip__label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink);
}

/* ——— Portals ——— */
.portals {
  display: grid;
  gap: var(--space-4);
  width: min(1200px, calc(100% - 24px));
  margin: 0 auto var(--space-6);
  align-items: stretch;
}

.portal {
  display: flex;
  height: 100%;
  min-width: 0;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 420ms var(--ease-out) forwards;
}

.portal:nth-child(1) {
  animation-delay: 300ms;
}
.portal:nth-child(2) {
  animation-delay: 380ms;
}
.portal:nth-child(3) {
  animation-delay: 460ms;
}

.portal__link {
  position: relative;
  display: grid;
  grid-template-rows: 220px minmax(0, 1fr);
  flex: 1 1 auto;
  width: 100%;
  min-height: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  transition:
    box-shadow var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out);
  touch-action: manipulation;
}

.portal__link:hover {
  box-shadow: 0 16px 40px rgba(38, 38, 38, 0.12);
  border-color: color-mix(in srgb, var(--ring-2) 35%, var(--line));
}

.portal__link:active {
  filter: brightness(0.98);
}

/* 选中态：持续高亮 + 循环流光（不使用 scale，避免卡片尺寸不一致） */
.portal.is-spotlight .portal__link,
.portal.is-active .portal__link {
  border-color: color-mix(in srgb, var(--ring-2) 60%, var(--line));
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--ring-2) 32%, transparent),
    0 16px 36px rgba(221, 42, 123, 0.18);
}

.portal.is-spotlight .portal__ring,
.portal.is-active .portal__ring {
  animation: ring-spin 2.4s linear infinite;
}

.portal__shimmer {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(
    115deg,
    transparent 0%,
    transparent 40%,
    rgba(255, 255, 255, 0.62) 50%,
    transparent 60%,
    transparent 100%
  );
  background-size: 220% 100%;
  background-position: 120% 0;
  mix-blend-mode: soft-light;
}

.portal.is-spotlight .portal__shimmer,
.portal.is-active .portal__shimmer {
  opacity: 1;
  animation: portal-shimmer 2.2s linear infinite;
}

.portal__media {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  min-height: 0;
  height: 100%;
}

.portal__media--Interactive,
.portal__media--quiz {
  background:
    radial-gradient(circle at 25% 30%, rgba(255, 255, 255, 0.28), transparent 40%),
    linear-gradient(155deg, #ff8a65 0%, #e91e63 48%, #9c27b0 100%);
}

.portal__media--games {
  background:
    radial-gradient(circle at 70% 20%, rgba(255, 255, 255, 0.24), transparent 42%),
    linear-gradient(155deg, #7c4dff 0%, #3f51b5 55%, #00bcd4 100%);
}

.portal__media--story {
  background:
    radial-gradient(circle at 40% 70%, rgba(255, 255, 255, 0.22), transparent 45%),
    linear-gradient(155deg, #ffca28 0%, #ff7043 45%, #ec407a 100%);
}

.portal__grain {
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.portal__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.portal__orb--a {
  width: 42%;
  aspect-ratio: 1;
  top: -12%;
  right: -8%;
  background: rgba(255, 255, 255, 0.18);
}

.portal__orb--b {
  width: 28%;
  aspect-ratio: 1;
  bottom: -10%;
  left: 8%;
  background: rgba(0, 0, 0, 0.12);
}

.portal__icon-wrap {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

.portal__ring {
  display: grid;
  place-items: center;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  padding: 3px;
  background: var(--story-gradient);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  transition: transform var(--dur) var(--ease-out);
}

.portal__link:hover .portal__ring {
  transform: scale(1.05);
  animation: ring-spin 5s linear infinite;
}

.portal__icon {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.96);
  color: var(--ink);
  border: 3px solid transparent;
}

.portal__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 20px 22px;
  min-width: 0;
  min-height: 0;
  height: 100%;
}

.portal__kicker {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.portal__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.portal__desc {
  margin: 2px 0 10px;
  color: var(--muted);
  max-width: 38ch;
  flex: 1 1 auto;
}

.portal__cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  align-self: flex-start;
  margin-top: auto;
  min-height: 44px;
  padding: 0 4px 0 0;
  color: var(--cta);
  font-weight: 700;
  font-size: 0.95rem;
  transition: color var(--dur) var(--ease-out), gap var(--dur) var(--ease-out);
}

.portal__link:hover .portal__cta {
  color: var(--cta-hover);
  gap: 8px;
}

/* ——— Mobile portal tabs (top) ——— */
.bottom-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  min-height: calc(var(--mobile-nav-h) - 12px);
  gap: 4px;
  padding: 0;
  background: transparent;
  border: 0;
}

.bottom-nav__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 48px;
  border-radius: var(--radius-md);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition:
    color var(--dur) var(--ease-out),
    background var(--dur) var(--ease-out),
    transform var(--dur) var(--ease-out);
}

.bottom-nav__item:hover,
.bottom-nav__item.is-active {
  color: var(--ink);
  background: color-mix(in srgb, var(--line) 30%, transparent);
}

.bottom-nav__item:active {
  transform: scale(0.96);
}

.bottom-nav__item.is-active svg {
  color: var(--ring-2);
}

/* ——— Toast ——— */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  z-index: var(--z-toast);
  transform: translateX(-50%) translateY(12px);
  max-width: min(90vw, 360px);
  padding: 12px 16px;
  border-radius: var(--radius-pill);
  background: rgba(38, 38, 38, 0.92);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity var(--dur) var(--ease-out),
    transform var(--dur) var(--ease-out);
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ——— Animations ——— */
@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes ring-spin {
  to {
    filter: hue-rotate(360deg);
  }
}

@keyframes shimmer {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

@keyframes portal-shimmer {
  0% {
    background-position: 130% 0;
  }
  100% {
    background-position: -40% 0;
  }
}

/* ——— Tablet ——— */
@media (min-width: 768px) {
  .topbar {
    justify-content: flex-start;
    min-height: var(--topbar-h);
    padding: 10px max(16px, env(safe-area-inset-right)) 10px
      max(16px, env(safe-area-inset-left));
  }

  .bottom-nav {
    display: none;
  }

  .topbar__nav {
    display: flex;
  }

  .hero {
    margin-top: var(--space-6);
    margin-bottom: var(--space-5);
  }

  .portals {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    width: min(1120px, calc(100% - 48px));
    align-items: stretch;
  }

  .portal__link {
    grid-template-rows: 280px minmax(200px, 1fr);
    min-height: 100%;
    height: 100%;
  }

  .portal__media {
    min-height: 0;
    height: 100%;
  }

  .story-strip {
    display: none;
  }
}

/* ——— Desktop: one composition ——— */
@media (min-width: 1024px) {
  .hero {
    margin-top: clamp(32px, 6vh, 72px);
  }

  .portals {
    width: min(1200px, calc(100% - 64px));
    gap: 28px;
    min-height: min(560px, calc(100dvh - 260px));
  }

  .portal__link {
    grid-template-rows: 300px minmax(220px, 1fr);
  }

  .portal__media {
    min-height: 0;
  }

  .portal__ring {
    width: 112px;
    height: 112px;
  }

  .portal__body {
    padding: 24px 24px 28px;
  }
}

/* ——— Large ——— */
@media (min-width: 1440px) {
  .portals {
    width: 1240px;
  }
}