/* ============================================================
   鲸鱼娘手帐 · paper-zine redesign
   cream paper / navy ink / pastel pink & periwinkle
   ============================================================ */

:root,
:root[data-theme="light"] {
  --paper: #faf4ea;
  --paper-2: #f2e8d8;
  --ink: #1b2545;
  --ink-soft: #66718c;
  --pink: #f6c9d0;
  --peri: #cdd2f8;
  --sky: #cfe8ff;
  --gold2: #d9b45a;
  --bg: var(--paper);
  --bg-2: var(--paper-2);
  --panel: #fffdf8;
  --panel-2: #f8f0e3;
  --glass: rgba(255, 253, 248, 0.88);
  --glass-2: rgba(255, 253, 248, 0.97);
  --line: rgba(27, 37, 69, 0.16);
  --line-strong: rgba(27, 37, 69, 0.42);
  --text: var(--ink);
  --dim: var(--ink-soft);
  --dim2: #667085;
  --brand: #4a63e8;
  --brand-2: #7e8cff;
  --aqua: #7fc7e8;
  --gold: #c9a24a;
  --pink2: #f08fb0;
  --shadow: 0 18px 40px rgba(40, 50, 90, 0.1);
  --outline: #1b2545;
  --hard: 3px 3px 0 var(--outline);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --paper: #151c33;
  --paper-2: #1b2444;
  --ink: #f7f1e6;
  --ink-soft: #b9c0d8;
  --pink: #eeb6c2;
  --peri: #aeb8f0;
  --sky: #9fc9ef;
  --gold2: #e2c06a;
  --bg: var(--paper);
  --bg-2: var(--paper-2);
  --panel: #1e2846;
  --panel-2: #243052;
  --glass: rgba(30, 40, 70, 0.88);
  --glass-2: rgba(30, 40, 70, 0.97);
  --line: rgba(247, 241, 230, 0.16);
  --line-strong: rgba(247, 241, 230, 0.42);
  --text: var(--ink);
  --dim: var(--ink-soft);
  --dim2: #8d97b5;
  --brand: #9aa8ff;
  --brand-2: #c3ccff;
  --aqua: #8fd8ff;
  --gold: #e2c06a;
  --pink2: #f4a7bd;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
  --outline: #f7f1e6;
  --hard: 3px 3px 0 rgba(0, 0, 0, 0.5);
  color-scheme: dark;
}

/* ---------- 纸张底 ---------- */
body,
:root[data-theme="light"] body {
  background-color: var(--paper);
  background-image: radial-gradient(rgba(27, 37, 69, 0.055) 1px, transparent 1.4px);
  background-size: 20px 20px;
  background-attachment: fixed;
}
:root[data-theme="dark"] body {
  background-color: var(--paper);
  background-image: radial-gradient(rgba(247, 241, 230, 0.045) 1px, transparent 1.4px);
}

/* ---------- 顶栏 ---------- */
#topbar {
  background: linear-gradient(to bottom, var(--paper) 72%, rgba(250, 244, 234, 0));
  border-bottom: 0;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
:root[data-theme="dark"] #topbar {
  background: linear-gradient(to bottom, var(--paper) 72%, rgba(21, 28, 51, 0));
}
#topbar.scrolled {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
#convTitle {
  font-size: 15.5px;
  font-weight: 820;
  letter-spacing: -0.3px;
  color: var(--ink);
}
#modelBadge {
  margin-top: 3px;
  padding: 2px 9px 2px 7px;
  background: var(--panel);
  border: 1.5px solid var(--outline);
  border-radius: 999px;
  box-shadow: 2px 2px 0 var(--outline);
  color: var(--ink);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.1px;
}
#modelBadge .live-dot {
  width: 5px; height: 5px;
  background: var(--pink);
  box-shadow: none;
  animation: none;
}
.icon-btn {
  color: var(--ink);
  width: 36px;
  height: 36px;
  border-radius: 10px;
}
.icon-btn:active { background: var(--paper-2); }

/* ---------- 空状态：手帐拼贴 ---------- */
.empty {
  min-height: calc(100dvh - 210px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 4px 0 22px;
  text-align: center;
  animation: fade 0.45s ease;
}

.hero-collage {
  position: relative;
  width: min(100%, 380px);
  height: 304px;
  margin: 0 0 14px;
  flex: none;
}

.paper-card {
  position: absolute;
  left: 50%;
  top: 6px;
  width: 206px;
  height: 276px;
  transform: translateX(-50%) rotate(-1.2deg);
  background: linear-gradient(180deg, #ecf3ff 0%, #dbeaff 62%, #c9e0ff 100%);
  border: 2px solid var(--outline);
  border-radius: 20px;
  box-shadow: 5px 6px 0 var(--outline);
  overflow: hidden;
  z-index: 2;
}
.paper-card::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(27, 37, 69, 0.13);
  border-radius: 14px;
  pointer-events: none;
  z-index: 4;
}
:root[data-theme="dark"] .paper-card {
  background: linear-gradient(180deg, #2a3a63 0%, #1b2849 62%, #15203d 100%);
}
:root[data-theme="dark"] .paper-card::after {
  border-color: rgba(247, 241, 230, 0.14);
}

.paper-tab {
  position: absolute;
  top: 7px;
  left: 12px;
  z-index: 6;
  background: var(--pink);
  border: 2px solid var(--outline);
  border-radius: 7px;
  padding: 2px 8px;
  font-size: 8.5px;
  font-weight: 820;
  letter-spacing: 0.6px;
  color: #1b2545;
  box-shadow: 2px 2px 0 var(--outline);
  transform: rotate(-2deg);
}
.paper-tape {
  position: absolute;
  top: 0;
  right: 30px;
  width: 54px;
  height: 14px;
  transform: rotate(2deg);
  background: rgba(246, 201, 208, 0.72);
  border-left: 1px dashed rgba(255, 255, 255, 0.75);
  border-right: 1px dashed rgba(255, 255, 255, 0.75);
  box-shadow: 0 1px 3px rgba(27, 37, 69, 0.08);
  z-index: 7;
  pointer-events: none;
}
.paper-bubble {
  position: absolute;
  top: 15px;
  right: -7px;
  z-index: 6;
  background: var(--panel);
  border: 2px solid var(--outline);
  border-radius: 11px;
  padding: 4px 9px;
  font-size: 10.5px;
  font-weight: 760;
  color: var(--ink);
  box-shadow: 2px 2px 0 var(--outline);
  transform: rotate(2deg);
}
.paper-bubble::after {
  content: "";
  position: absolute;
  left: 11px;
  bottom: -7px;
  width: 9px;
  height: 9px;
  background: var(--panel);
  border-right: 2px solid var(--outline);
  border-bottom: 2px solid var(--outline);
  transform: rotate(45deg);
}
.paper-art {
  position: absolute;
  left: 50%;
  bottom: -4px;
  transform: translateX(-50%);
  height: 238px;
  width: auto;
  z-index: 3;
  filter: drop-shadow(0 10px 14px rgba(30, 50, 120, 0.18));
  user-select: none;
  animation: paperFloat 6.5s ease-in-out infinite;
}
@keyframes paperFloat {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-6px); }
}
.paper-spark {
  position: absolute;
  color: var(--gold2);
  z-index: 5;
  font-size: 11px;
  opacity: 0.9;
  animation: sparkle 4s ease-in-out infinite;
}
.paper-spark.ps1 { top: 19%; left: 11%; font-size: 9px; animation-delay: -0.7s; }
.paper-spark.ps2 { top: 34%; right: 9%; font-size: 13px; animation-delay: -2.1s; }
@keyframes sparkle {
  0%, 100% { opacity: 0.25; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.12); }
}

/* 四张同人照片 / 贴纸 */
.photo {
  position: absolute;
  object-fit: cover;
  border: 4px solid #fff;
  border-radius: 3px;
  box-shadow: 0 0 0 1.5px var(--outline), 3px 4px 0 rgba(27, 37, 69, 0.16);
  background: #fff;
  z-index: 4;
}
.photo.p1 {
  left: 0;
  bottom: 2px;
  width: 92px;
  height: 92px;
  transform: rotate(-7deg);
}
.photo.p2 {
  right: 0;
  top: 30px;
  width: 74px;
  height: 98px;
  transform: rotate(6deg);
}
.sticker {
  position: absolute;
  z-index: 6;
  filter: drop-shadow(0 3px 0 rgba(27, 37, 69, 0.18));
  user-select: none;
}
.sticker.s1 {
  left: 0;
  top: 8px;
  width: 94px;
  transform: rotate(-9deg);
}
.sticker.s2 {
  right: 4px;
  bottom: -4px;
  width: 88px;
  transform: rotate(8deg);
}

.empty h2 {
  margin: 0 0 5px;
  font-size: 29px;
  line-height: 1.2;
  letter-spacing: -1.2px;
  font-weight: 850;
  color: var(--ink);
}
.empty p {
  margin: 0 0 16px;
  max-width: 320px;
  color: var(--dim);
  font-size: 12.5px;
  line-height: 1.7;
}
.empty .empty-foot {
  margin: 14px 0 0;
  color: var(--dim2);
  font-size: 9px;
  letter-spacing: 0.5px;
  opacity: 0.72;
}

.sticker-rail {
  width: 100%;
  max-width: 440px;
  margin-top: 15px;
  text-align: left;
}
.rail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2px 6px;
  color: var(--dim);
  font-size: 8.5px;
  font-weight: 850;
  letter-spacing: 1.3px;
}
.rail-head span:last-child {
  color: var(--dim2);
  font-weight: 700;
  letter-spacing: 0;
}
.rail-track {
  display: flex;
  gap: 7px;
}
.rail-track img {
  width: 70px;
  height: 70px;
  object-fit: cover;
  background: #fff;
  border: 3px solid #fff;
  outline: 1.5px solid var(--outline);
  border-radius: 4px;
  box-shadow: 2px 2px 0 rgba(27, 37, 69, 0.14);
  transform: rotate(-1.5deg);
}
.rail-track img:nth-child(even) { transform: rotate(1.5deg); }

/* ---------- 建议卡 ---------- */
.sugs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  width: 100%;
  max-width: 440px;
}
.sug {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 9px 10px;
  border-radius: 13px;
  background: var(--panel);
  border: 1.5px solid var(--outline);
  box-shadow: 3px 3px 0 var(--outline);
  text-align: left;
  color: var(--ink);
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.sug:nth-child(odd) { transform: rotate(-0.35deg); }
.sug:nth-child(even) { transform: rotate(0.35deg); }
.sug:hover {
  transform: translate(-1px, -1px) rotate(0deg);
  box-shadow: 4px 4px 0 var(--outline);
}
.sug:active { transform: translate(1px, 1px); box-shadow: 2px 2px 0 var(--outline); }
.sug-no {
  flex: none;
  width: 23px;
  height: 23px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--pink);
  border: 1.5px solid var(--outline);
  box-shadow: 1px 1px 0 var(--outline);
  font-size: 8.5px;
  font-weight: 850;
  color: #1b2545;
  letter-spacing: 0.2px;
}
.sug-txt {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.sug-txt b {
  font-size: 12px;
  font-weight: 820;
  line-height: 1.3;
  color: var(--ink);
}
.sug-txt span {
  font-size: 10.2px;
  color: var(--dim);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sug-arrow {
  flex: none;
  font-size: 12px;
  color: var(--ink);
  opacity: 0.55;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.sug:hover .sug-arrow { transform: translate(1px, -1px); opacity: 1; }

/* ---------- 输入区 ---------- */
#composerWrap {
  background: linear-gradient(to top, var(--paper) 58%, rgba(250, 244, 234, 0));
}
:root[data-theme="dark"] #composerWrap {
  background: linear-gradient(to top, var(--paper) 58%, rgba(21, 28, 51, 0));
}
#composer {
  background: var(--panel);
  border: 2px solid var(--outline);
  border-radius: 22px;
  box-shadow: 4px 4px 0 var(--outline);
  padding: 7px 8px;
}
#composer:focus-within { box-shadow: 5px 5px 0 var(--outline); }
.composer-btn { color: var(--ink); opacity: 0.75; }
#input { color: var(--ink); font-size: 15px; }
#input::placeholder { color: #9aa2b8; }
.send-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--outline);
  box-shadow: 2px 2px 0 rgba(27, 37, 69, 0.18);
  display: grid;
  place-items: center;
}
.send-btn:disabled { opacity: 0.35; }
.send-btn svg { width: 18px; height: 18px; stroke-width: 2.4; }

#toolbar { padding-top: 7px; }
.chip {
  background: var(--panel);
  border: 1.5px solid var(--outline);
  border-radius: 999px;
  box-shadow: 2px 2px 0 var(--outline);
  color: var(--ink);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 9px;
}
.chip svg { width: 13px; height: 13px; }
.chip.on {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 2px 2px 0 rgba(27, 37, 69, 0.25);
}
:root[data-theme="light"] .chip.on {
  background: var(--ink);
  color: var(--paper);
}
:root[data-theme="dark"] .chip.on { color: #151c33; }
.seg {
  background: var(--panel);
  border: 1.5px solid var(--outline);
  border-radius: 999px;
  box-shadow: 2px 2px 0 var(--outline);
  padding: 2px;
}
.seg button {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--dim);
  border-radius: 999px;
  padding: 3px 6px;
}
.seg button.on {
  background: var(--ink);
  color: var(--paper);
  box-shadow: none;
}
:root[data-theme="dark"] .seg button.on { color: #151c33; }
#effortHint { color: var(--dim2); font-size: 10.5px; }

/* ---------- 消息 ---------- */
.msg.user .bubble {
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--outline);
  border-radius: 18px 18px 6px 18px;
  box-shadow: 3px 3px 0 rgba(27, 37, 69, 0.2);
  font-size: 15px;
  line-height: 1.7;
}
.a-avatar {
  width: 30px;
  height: 30px;
  border: 2px solid var(--outline);
  box-shadow: 2px 2px 0 var(--outline);
  background: #fff;
}
.a-name { font-weight: 800; color: var(--ink); }
.a-model {
  background: var(--pink);
  color: #1b2545;
  border: 1px solid var(--outline);
  border-radius: 999px;
  font-weight: 750;
  padding: 1px 7px;
}
.a-state { color: var(--dim2); }
.msg.assistant .md { color: var(--ink); line-height: 1.85; }
.think {
  background: #fff8e7;
  border: 1.5px dashed rgba(27, 37, 69, 0.32);
  border-radius: 12px;
}
:root[data-theme="dark"] .think {
  background: #222c4a;
  border-color: rgba(247, 241, 230, 0.28);
}
.think > summary { color: var(--ink-soft); }
.meta { color: var(--dim2); }

/* ---------- 设置 ---------- */
.sheet {
  background: var(--paper);
  border: 2px solid var(--outline);
  border-bottom: 0;
  border-radius: 26px 26px 0 0;
  box-shadow: 0 -20px 50px rgba(20, 30, 60, 0.18);
}
.sheet-head {
  border-bottom: 1.5px solid var(--outline);
  padding: 14px 16px;
}
.sheet-title { font-weight: 850; letter-spacing: -0.4px; color: var(--ink); }
.set-group h3 {
  font-size: 9px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  font-weight: 850;
  color: var(--dim);
  margin: 16px 0 7px;
}
.set-row {
  background: var(--panel);
  border: 1.5px solid var(--outline);
  border-radius: 12px;
  box-shadow: 2px 2px 0 var(--outline);
  margin-bottom: 8px;
  padding: 10px 12px;
}
.set-row > .grow > div:first-child { font-weight: 750; color: var(--ink); }
.set-row .hint { color: var(--dim); font-size: 10.5px; line-height: 1.5; }
.badge {
  background: var(--pink);
  border: 1px solid var(--outline);
  color: #1b2545;
  border-radius: 999px;
  font-weight: 750;
  padding: 2px 8px;
}
.btn-sm {
  background: var(--panel);
  border: 1.5px solid var(--outline);
  border-radius: 9px;
  box-shadow: 2px 2px 0 var(--outline);
  color: var(--ink);
  font-weight: 700;
  padding: 5px 9px;
}
.btn-sm:active { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--outline); }

/* ---------- 抽屉 ---------- */
#drawer {
  background: var(--paper);
  border-right: 2px solid var(--outline);
}
.drawer-head {
  border-bottom: 1.5px solid var(--outline);
  padding: 14px 16px;
}
.drawer-title { font-weight: 850; color: var(--ink); letter-spacing: -0.3px; }
.conv-item {
  border: 1.5px solid transparent;
  border-radius: 12px;
  color: var(--ink);
}
.conv-item.active {
  background: var(--pink);
  border-color: var(--outline);
  box-shadow: 2px 2px 0 var(--outline);
}
.conv-item .conv-title { font-weight: 700; }
.drawer-action {
  color: var(--ink);
  font-weight: 700;
  border-radius: 10px;
}
.drawer-foot { border-top: 1.5px solid var(--outline); padding: 10px 12px; }

/* ---------- 登录 / 设置 API Key ---------- */
.overlay {
  background-color: var(--paper);
  background-image: radial-gradient(rgba(27, 37, 69, 0.06) 1px, transparent 1.4px);
  background-size: 20px 20px;
}
.login-card {
  background: var(--panel);
  border: 2px solid var(--outline);
  border-radius: 24px;
  box-shadow: 6px 6px 0 var(--outline);
  padding: 26px 22px 22px;
}
.login-card .logo {
  width: 92px;
  height: 92px;
  border: 3px solid var(--outline);
  box-shadow: 4px 4px 0 var(--outline);
  background: #fff;
}
.login-card h1 {
  color: var(--ink);
  font-size: 24px;
  font-weight: 850;
  letter-spacing: -0.6px;
}
.login-card .muted { color: var(--dim); }
.login-card .field {
  background: #fffdf8;
  border: 1px solid #d8cbb8;
  border-radius: 12px;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 1px;
  text-align: center;
}
.login-card .field::placeholder {
  color: #756d61;
  opacity: 1;
  font-weight: 400;
  letter-spacing: 2px;
}
.login-card .field:focus {
  border-color: #8fa0ff;
  box-shadow: 0 0 0 3px rgba(108, 125, 240, 0.12);
  outline: none;
}

/* ---------- 可访问性 / 搜索 / 工具聚合 ---------- */
:where(button, a, input, textarea, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--outline);
  outline-offset: 2px;
}
#input:focus-visible { outline: none; }

#input::placeholder { color: #6b7280; }
:root[data-theme="dark"] #input::placeholder { color: #9aa2b8; }

.drawer-search { padding: 10px 12px 4px; }
.drawer-search input {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border: 1.5px solid var(--outline);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: 1.5px 1.5px 0 var(--outline);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
}
.drawer-search input::placeholder { color: #6b7280; }

.conv-main {
  flex: 1;
  min-width: 0;
  display: block;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.conv-name, .conv-sub { display: block; }
.conv-item.active .conv-name { color: var(--ink); }
.conv-item.active .conv-sub { color: var(--ink-soft); }
.conv-tools button { min-width: 30px; min-height: 30px; }

.tools-box {
  border: 1.5px solid var(--outline);
  border-radius: 12px;
  background: var(--panel);
  overflow: hidden;
}
.tools-box > summary {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 11px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}
.tools-box > summary::-webkit-details-marker { display: none; }
.tools-box .tools-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 9px 9px;
}
.tools-box .tool {
  border: 0;
  box-shadow: none;
  background: transparent;
  padding: 3px 0;
}
.tools-box .tool .src-list { margin-top: 4px; }
.login-card .primary {
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--outline);
  border-radius: 12px;
  box-shadow: 3px 3px 0 rgba(27, 37, 69, 0.2);
  font-weight: 800;
}
.login-card .link { color: var(--ink-soft); }
.setup-icon { background: var(--pink); border: 2px solid var(--outline); color: #1b2545; border-radius: 16px; }

/* ---------- 回到底部 ---------- */
#toBottom {
  background: var(--panel);
  border: 2px solid var(--outline);
  box-shadow: 3px 3px 0 var(--outline);
  color: var(--ink);
}