/* ── Session loading ── */
.session-loading {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

body[data-view="loading"] .session-loading {
  opacity: 1;
  visibility: visible;
}

body:not([data-view="loading"]) .session-loading {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.session-loading__ring {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid rgba(var(--accent-r), 0.15);
  border-top-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow-soft);
  animation: sessionSpin 0.85s linear infinite;
}

@keyframes sessionSpin {
  to { transform: rotate(360deg); }
}

/* ── App shell transitions ── */
.app-shell {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  position: relative;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.55s cubic-bezier(0.25, 0.1, 0.25, 1);
  pointer-events: none;
}

.app-shell.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.app-shell[hidden] {
  display: none !important;
}

/* ── Landing page ── */
.landing {
  position: fixed;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.55s cubic-bezier(0.25, 0.1, 0.25, 1),
    visibility 0.55s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.landing.is-visible {
  opacity: 1;
  visibility: visible;
}

.landing[hidden] {
  display: none !important;
}

.landing:not(.is-visible) .landing__reveal {
  opacity: 0;
  transform: translateY(18px);
}

.landing__particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.landing__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 560px;
  width: 100%;
}

.landing__badge {
  display: inline-flex;
  align-items: center;
  margin-bottom: 28px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--accent-border);
  background: rgba(var(--accent-r), 0.08);
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  box-shadow:
    0 0 18px var(--accent-glow-soft),
    0 0 0 1px rgba(var(--accent-r), 0.06) inset;
  transition: color var(--theme-transition), border-color var(--theme-transition), box-shadow var(--theme-transition);
}

.landing__headline {
  position: relative;
  margin-bottom: 24px;
  font-size: clamp(2rem, 6vw, 3.25rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.08;
  color: var(--text-primary);
}

.landing__headline-text {
  position: relative;
  z-index: 1;
}

.landing__headline-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(420px, 90vw);
  height: 120px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, rgba(var(--accent-r), 0.28) 0%, transparent 70%);
  filter: blur(28px);
  z-index: 0;
  animation: landingHeadlineGlow 4s ease-in-out infinite;
  transition: background var(--theme-transition);
}

@keyframes landingHeadlineGlow {
  0%, 100% { opacity: 0.55; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.9; transform: translate(-50%, -50%) scale(1.08); }
}

.landing__subtitle {
  margin-bottom: 40px;
  font-size: clamp(0.95rem, 2.5vw, 1.1rem);
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 420px;
}

.landing__cta {
  min-width: 200px;
  padding: 15px 36px;
  margin-bottom: 20px;
  border: none;
  border-radius: 999px;
  background: var(--accent);
  color: #000;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow:
    0 0 24px var(--accent-glow),
    0 8px 28px rgba(0, 0, 0, 0.35);
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    background var(--theme-transition);
}

.landing__cta:hover,
.landing__cta:focus-visible {
  transform: scale(1.04);
  box-shadow:
    0 0 32px var(--accent-glow-strong),
    0 10px 32px rgba(0, 0, 0, 0.4);
  outline: none;
}

.landing__signin-prompt {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.landing__signin-link {
  padding: 0;
  margin-left: 4px;
  border: none;
  background: none;
  color: var(--accent);
  font: inherit;
  font-size: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--theme-transition), opacity var(--transition);
}

.landing__signin-link:hover,
.landing__signin-link:focus-visible {
  opacity: 0.85;
  outline: none;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Staggered entrance */
.landing__reveal {
  opacity: 0;
  transform: translateY(18px);
}

.landing.is-visible .landing__reveal {
  animation: landingReveal 0.75s cubic-bezier(0.25, 0.1, 0.25, 1) forwards;
}

.landing.is-visible .landing__badge { animation-delay: 0.05s; }
.landing.is-visible .landing__headline { animation-delay: 0.12s; }
.landing.is-visible .landing__subtitle { animation-delay: 0.2s; }
.landing.is-visible .landing__cta { animation-delay: 0.28s; }
.landing.is-visible .landing__signin-prompt { animation-delay: 0.36s; }

@keyframes landingReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .landing {
    padding: 36px 20px;
  }

  .landing__badge {
    margin-bottom: 22px;
    font-size: 0.62rem;
  }

  .landing__subtitle {
    margin-bottom: 32px;
    line-height: 1.65;
  }

  .landing__cta {
    min-width: 180px;
    padding: 14px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .session-loading__ring {
    animation: none;
    border-top-color: var(--accent);
  }

  .landing__headline-glow {
    animation: none;
    opacity: 0.7;
  }

  .landing__reveal {
    opacity: 1;
    transform: none;
  }

  .landing.is-visible .landing__reveal {
    animation: none;
  }

  .app-shell {
    transition: none;
  }

  .landing {
    transition: none;
  }
}

/* ── Profile not found ── */
.profile-not-found {
  position: fixed;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.55s cubic-bezier(0.25, 0.1, 0.25, 1),
    visibility 0.55s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.profile-not-found.is-visible {
  opacity: 1;
  visibility: visible;
}

.profile-not-found[hidden] {
  display: none !important;
}

.profile-not-found__content {
  max-width: 420px;
  text-align: center;
}

.profile-not-found__title {
  margin: 0 0 12px;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  text-shadow: 0 0 24px var(--accent-glow-soft);
}

.profile-not-found__text {
  margin: 0 0 28px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.profile-not-found__home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid rgba(var(--accent-r), 0.35);
  background: rgba(var(--accent-r), 0.1);
  box-shadow: 0 0 16px var(--accent-glow-soft);
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition:
    background var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.profile-not-found__home:hover,
.profile-not-found__home:focus-visible {
  background: rgba(var(--accent-r), 0.16);
  border-color: var(--accent-border);
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-1px);
}

@media (prefers-reduced-motion: reduce) {
  .profile-not-found {
    transition: none;
  }
}