/* --- Landing / Session Screen --- */

/* Subtle film-grain overlay for atmosphere on the landing screen. */
#session-screen.active::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.06;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.6 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

#session-screen.active {
  display: block;
  height: 100dvh;
  overflow: hidden;
  position: relative;
}

.landing {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(360px, 1fr);
  height: 100dvh;
  width: 100%;
}

.landing-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(2.5rem, 5vw, 5rem) clamp(2rem, 4vw, 3.5rem) clamp(2.5rem, 5vw, 5rem) clamp(2rem, 6vw, 6rem);
  overflow-y: auto;
  overflow-x: hidden;
}

.landing-hero::after {
  content: "";
  position: absolute;
  right: -2rem;
  bottom: -3rem;
  width: 360px;
  height: 360px;
  background-image: radial-gradient(circle at center, rgba(200, 148, 86, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.landing-hero-inner {
  max-width: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-mark {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--accent);
  line-height: 1;
  opacity: 0;
  animation: fadeUp 600ms ease 0ms forwards;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
  opacity: 0;
  animation: fadeUp 600ms ease 80ms forwards;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.4rem, 5.5vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  color: var(--text-strong);
  margin: 0;
  opacity: 0;
  animation: fadeUp 700ms ease 160ms forwards;
}

.hero-title em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.hero-comma,
.hero-period {
  color: var(--accent);
}

.hero-tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 1.15rem;
  color: var(--muted);
  margin: 0.25rem 0 0.5rem;
  max-width: 420px;
  line-height: 1.5;
  opacity: 0;
  animation: fadeUp 700ms ease 240ms forwards;
}

.hero-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin-top: 0.75rem;
  opacity: 0;
  animation: fadeUp 700ms ease 320ms forwards;
}

.hero-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
  padding: 1rem 1.15rem;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 3px;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.25s, background 0.25s, transform 0.25s;
}
.hero-card:hover {
  border-color: var(--accent);
  background: rgba(200, 148, 86, 0.04);
  transform: translateY(-1px);
}
.hero-card:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.hero-card.used {
  opacity: 0.45;
}
.hero-card.used:hover {
  opacity: 0.7;
}
.hero-card-icon {
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.15rem;
}
.hero-card-label {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 0.95rem;
  color: var(--text-strong);
  letter-spacing: -0.005em;
}
.hero-card-desc {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
}
.hero-card:hover .hero-card-label {
  color: var(--accent-soft);
}

/* Plain "Start a conversation" card — spans full width */
.hero-card.card-new-session {
  grid-column: 1 / -1;
  flex-direction: row;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 1.15rem;
  border-style: dashed;
}
.hero-card.card-new-session .hero-card-icon {
  margin-bottom: 0;
}

/* Keep .btn-editorial for any remaining uses */
.btn-editorial {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.4rem;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.2s;
}
.btn-editorial:hover {
  border-color: var(--accent);
  color: var(--accent-soft);
}
.btn-editorial.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}
.btn-editorial.primary:hover {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
  color: var(--ink);
  transform: translateY(-1px);
}
.btn-editorial svg {
  transition: transform 0.2s;
}
.btn-editorial.primary:hover svg {
  transform: translateX(3px);
}
.btn-editorial:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.hero-skills {
  margin-top: 1.5rem;
  opacity: 0;
  animation: fadeUp 700ms ease 400ms forwards;
}

.hero-skills-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.85rem;
}
.hero-skills-label .rule {
  flex: 1;
  height: 1px;
  background: var(--rule);
}
.hero-skills-label .rule:last-child {
  flex: 4;
}

.skills-strip {
  position: relative;
  display: flex;
  gap: 1.25rem;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0.25rem 0 0.5rem;
  mask-image: linear-gradient(to right, transparent 0, #000 24px, #000 calc(100% - 48px), transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 24px, #000 calc(100% - 48px), transparent 100%);
}
.skills-strip::-webkit-scrollbar {
  display: none;
}

.skill-word {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--text);
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: -0.01em;
}
.skill-word.builtin {
  font-style: normal;
}
.skill-word.custom {
  font-style: italic;
  color: var(--accent-soft);
}
.skill-word.size-sm { font-size: 1rem; }
.skill-word.size-md { font-size: 1.35rem; }
.skill-word.size-lg { font-size: 1.7rem; }
.skill-word.size-xl { font-size: 2.05rem; }

.btn-promote {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.7rem;
  padding: 0 0 0 0.15rem;
  line-height: 1;
  align-self: center;
}
.btn-promote:hover {
  color: var(--text-strong);
}

.landing-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
  animation: fadeUp 700ms ease 480ms forwards;
}

.link-btn {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  padding: 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.link-btn:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* --- Sidebar resize handle --- */

.sidebar-resize-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 6px;
  cursor: col-resize;
  z-index: 100;
  background: transparent;
  transition: background 0.15s;
}

.sidebar-resize-handle:hover,
.sidebar-resize-handle.active {
  background: rgba(255, 255, 255, 0.08);
}

.sidebar-resize-handle.active {
  background: rgba(255, 255, 255, 0.12);
}

/* --- Sessions sidebar --- */

.landing-sessions {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  border-left: 1px solid var(--rule);
  background: rgba(255, 255, 255, 0.012);
  overflow: hidden;
}

.sessions-header {
  flex-shrink: 0;
  --hpad: clamp(1.5rem, 3vw, 2.5rem);
  padding: clamp(2rem, 4vw, 3rem) 0 0;
  border-bottom: 1px solid var(--rule);
  background: var(--ink);
}

.sessions-title-row {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0 var(--hpad);
  margin-bottom: 1rem;
  transition:
    margin-bottom 360ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 360ms cubic-bezier(0.22, 1, 0.36, 1);
}

.sessions-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  color: var(--text-strong);
  transition:
    font-size 360ms cubic-bezier(0.22, 1, 0.36, 1),
    color 240ms ease,
    letter-spacing 360ms cubic-bezier(0.22, 1, 0.36, 1);
}

.sessions-count {
  margin-left: auto;
  padding-left: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  white-space: nowrap;
  transition: opacity 240ms ease;
}

.sessions-search {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  box-sizing: border-box;
  padding: 0.6rem var(--hpad);
  border-top: 1px solid transparent;
  border-bottom: 1px solid var(--rule);
  color: var(--muted);
  background: transparent;
  transition:
    padding 420ms cubic-bezier(0.22, 1, 0.36, 1),
    gap 420ms cubic-bezier(0.22, 1, 0.36, 1),
    background-color 320ms ease,
    border-color 240ms ease,
    color 240ms ease;
}
.sessions-search svg {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  transition:
    width 420ms cubic-bezier(0.22, 1, 0.36, 1),
    height 420ms cubic-bezier(0.22, 1, 0.36, 1);
}
.sessions-search:focus-within {
  border-bottom-color: var(--accent);
  color: var(--accent);
}
.sessions-search input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 0;
  transition: font-size 420ms cubic-bezier(0.22, 1, 0.36, 1);
}
.sessions-search input::placeholder {
  color: var(--muted);
  font-style: italic;
}

/* Expanded state: when the search input is focused OR has text in it */
.sessions-header:has(.sessions-search input:focus) .sessions-title-row,
.sessions-header:has(.sessions-search input:not(:placeholder-shown)) .sessions-title-row {
  margin-bottom: 0.4rem;
}
.sessions-header:has(.sessions-search input:focus) .sessions-title,
.sessions-header:has(.sessions-search input:not(:placeholder-shown)) .sessions-title {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  font-family: var(--font-mono);
}
.sessions-header:has(.sessions-search input:focus) .sessions-search,
.sessions-header:has(.sessions-search input:not(:placeholder-shown)) .sessions-search {
  padding: 1.35rem var(--hpad) 1.25rem;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.018);
  border-top-color: var(--rule);
}
.sessions-header:has(.sessions-search input:focus) .sessions-search svg,
.sessions-header:has(.sessions-search input:not(:placeholder-shown)) .sessions-search svg {
  width: 20px;
  height: 20px;
}
.sessions-header:has(.sessions-search input:focus) .sessions-search input,
.sessions-header:has(.sessions-search input:not(:placeholder-shown)) .sessions-search input {
  font-size: 1.35rem;
  font-family: var(--font-display);
}

.sessions-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem clamp(1.5rem, 3vw, 2.5rem) 2rem;
}

.sessions-empty {
  padding: 2rem clamp(1.5rem, 3vw, 2.5rem);
  font-family: var(--font-display);
  font-style: italic;
  color: var(--muted);
  font-size: 0.95rem;
}

.session-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 0.5rem 1rem;
  padding: 1.1rem 0.25rem 1rem;
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s;
  position: relative;
}
.session-item:hover {
  border-bottom-color: var(--accent);
}
.session-item:hover .session-name {
  color: var(--accent-soft);
  transform: translateX(3px);
}
.session-item .session-name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.05rem;
  color: var(--text-strong);
  letter-spacing: -0.005em;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s, transform 0.25s;
  min-width: 0;
}
.session-item .session-preview {
  font-size: 0.8rem;
  color: var(--muted);
  font-style: italic;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 0.25rem;
  min-width: 0;
}
.session-item .session-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-top: 0.45rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.session-item .session-meta .dot {
  display: inline-block;
  margin: 0 0.4rem;
  opacity: 0.6;
}
.session-item .session-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.session-item .session-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity 0.2s;
  align-self: start;
  margin-top: 0.15rem;
}
.session-item:hover .session-actions {
  opacity: 1;
}
.session-item .status {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  background: transparent;
  display: inline-block;
  align-self: center;
  margin-left: 0.4rem;
}
.session-item .status.alive {
  background: var(--sage);
  border-color: var(--sage);
  box-shadow: 0 0 0 3px rgba(107, 143, 110, 0.18);
}

.rename-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--accent);
  color: var(--text-strong);
  font-family: var(--font-display);
  font-size: 1.05rem;
  padding: 0.05rem 0;
  width: 100%;
  outline: none;
}

@media (max-width: 900px) {
  body:has(#session-screen.active) {
    overflow-y: auto;
  }
  #session-screen.active {
    overflow-y: auto;
    height: auto;
    min-height: 100dvh;
  }
  .landing {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 100dvh;
  }
  .landing-hero {
    padding: 3rem 1.5rem 2rem;
  }
  .landing-sessions {
    height: auto;
    border-left: none;
    border-top: 1px solid var(--rule);
    overflow: visible;
  }
  .sessions-header {
    position: sticky;
    top: 0;
    z-index: 3;
    padding: 1.5rem 1.5rem 1rem;
  }
  .sessions-list {
    overflow: visible;
    padding: 0.5rem 1.5rem 2rem;
  }
  .hero-title {
    font-size: clamp(2rem, 9vw, 3.2rem);
  }
  .hero-cards {
    grid-template-columns: 1fr;
  }
}