/* ═══════════════════════════════════════════
   忍者手记 — Layout & Shell v5.0 (Cinematic Ink)
   无界沉浸 · 毛玻璃视效 · 呼吸感排版
   ═══════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--fw-normal);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--surface-0);
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}

/* ── 极致收敛的背景 ──── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.015; /* 极弱的噪点质感 */
  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: overlay;
}

/* ── 动态环境光源 (Ambient Glow) ──── */
body::after {
  content: '';
  position: fixed;
  inset: -50%;
  pointer-events: none;
  z-index: -1;
  background: 
    radial-gradient(circle at 20% 30%, rgba(45, 108, 223, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(235, 97, 63, 0.05) 0%, transparent 45%),
    radial-gradient(circle at 60% 20%, rgba(198, 156, 109, 0.04) 0%, transparent 35%);
  filter: blur(80px);
  animation: ambientFloat 30s ease-in-out infinite alternate;
}
@keyframes ambientFloat {
  0% { transform: scale(1) translate(0, 0) rotate(0deg); }
  50% { transform: scale(1.1) translate(2%, 2%) rotate(2deg); }
  100% { transform: scale(1) translate(-2%, -2%) rotate(-1deg); }
}

body.is-in-combat {
  box-shadow: inset 0 0 150px rgba(201, 23, 30, 0.08);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
a { color: var(--c-shuiro); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.8; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-title); font-weight: var(--fw-bold); line-height: var(--leading-tight); }

:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--surface-0), 0 0 0 4px rgba(198,156,109,0.4);
  border-radius: var(--r-sm);
}
::selection { background: rgba(235,97,63,0.3); color: #fff; }

.icon {
  display: inline-block; width: 1em; height: 1em; vertical-align: -0.125em;
  stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; fill: none; stroke: currentColor;
}

/* ── 隐藏式 Scrollbar ──── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(244,241,234,0.1); border-radius: var(--r-full); }
::-webkit-scrollbar-thumb:hover { background: rgba(244,241,234,0.25); }

/* ── App Shell ──── */
#app { position: relative; z-index: 1; height: 100vh; height: 100dvh; width: 100%; }
.app-shell { display: flex; flex-direction: column; height: 100%; width: 100%; overflow: hidden; }
.app-shell--setup .app-sidebar,
.app-shell--setup .app-panel,
.app-shell--setup .topbar-btn--panel,
.app-shell--setup .topbar-btn--timeline,
.app-shell--setup .topbar-divider { display: none; }

/* ── Top Bar (毛玻璃质感) ──── */
.app-topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--sp-6); height: var(--topbar-h);
  background: rgba(7, 10, 14, 0.4);
  backdrop-filter: var(--blur-xl);
  -webkit-backdrop-filter: var(--blur-xl);
  border-bottom: 1px solid var(--border-hairline);
  flex-shrink: 0; z-index: var(--z-sticky); position: relative;
}

.topbar-left { display: flex; align-items: center; gap: var(--sp-4); }

.topbar-logo {
  font-family: var(--font-brush); font-size: 28px; color: var(--text-primary); 
  letter-spacing: 2px; display: flex; align-items: center; gap: 12px;
}
.topbar-logo .logo-seal {
  display: inline-flex; align-items: center; justify-content: center;
  background: transparent; border: 1.5px solid var(--c-shuiro);
  color: var(--c-shuiro); font-family: var(--font-title); font-weight: 800;
  font-size: 14px; width: 28px; height: 28px; line-height: 1; border-radius: 4px 6px 3px 5px;
  opacity: 0.85;
}

.branch-indicator {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px;
  border-radius: var(--r-full); color: var(--text-secondary); background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-hairline);
  font-size: var(--text-xs); font-family: var(--font-title); letter-spacing: 1px;
}
.branch-indicator::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--branch-color, var(--c-shuiro));
  box-shadow: 0 0 12px var(--branch-color, var(--c-shuiro));
}

.topbar-center { font-size: 10px; color: var(--text-tertiary); font-family: var(--font-mono); letter-spacing: 2px; text-transform: uppercase; }
#turn-display {
  font-family: var(--font-title); font-size: var(--text-xs); color: var(--text-secondary);
  letter-spacing: 4px; border-left: 1px solid var(--border-subtle); padding-left: 16px; margin-left: 16px;
}

.topbar-right { display: flex; align-items: center; gap: var(--sp-1); }
.topbar-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--r-md); color: var(--text-secondary);
  font-size: 18px; transition: all var(--dur-fast) var(--ease-out); 
  border: 1px solid transparent; background: var(--surface-icon-wrapper);
}
.topbar-btn-label { display: none; }
.topbar-btn:hover { 
  background: var(--surface-icon-wrapper-hover); 
  color: var(--text-primary); 
  border-color: rgba(255,255,255,0.1); 
}
.topbar-btn[aria-pressed="true"] {
  background: rgba(235,97,63,0.15); color: var(--c-shuiro);
  border-color: rgba(235,97,63,0.3);
}
.topbar-divider { width: 1px; height: 20px; background: var(--border-subtle); margin: 0 var(--sp-2); }

/* ── Main Layout ──── */
.app-main { display: flex; flex: 1; overflow: hidden; position: relative; }
.mobile-scrim { display: none; }

/* ── Sidebar (Timeline) ──── */
.app-sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  background: rgba(7, 10, 14, 0.4); backdrop-filter: var(--blur-xl); -webkit-backdrop-filter: var(--blur-xl);
  border-right: 1px solid var(--border-hairline);
  transition: width var(--dur-base) var(--ease-spring), opacity var(--dur-base) var(--ease-out);
  z-index: 10; position: relative; overflow: hidden;
}
.app-sidebar--collapsed { width: 0; opacity: 0; pointer-events: none; border-right: none; }

/* ── Center Chat ──── */
.app-center {
  flex: 1; display: flex; flex-direction: column; overflow: hidden; position: relative; z-index: 5;
}
.chat-container {
  flex: 1; overflow-y: auto; overflow-x: hidden; scroll-behavior: smooth;
  mask-image: linear-gradient(to bottom, transparent, #000 40px, #000 calc(100% - 100px), transparent);
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 40px, #000 calc(100% - 100px), transparent);
}
.chat-messages {
  padding: var(--sp-10) var(--sp-6) 160px; /* 给底部输入框留出足够的空间 */
  max-width: var(--chat-max-w); width: 100%; margin: 0 auto;
}

/* ── Chat Messages (无界排版) ──── */
.chat-message { margin-bottom: var(--sp-10); opacity: 0; animation: fadeUp var(--dur-base) var(--ease-out) forwards; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message--user { display: flex; justify-content: flex-end; }
.chat-message--user .chat-bubble {
  max-width: 80%; padding: var(--sp-4) var(--sp-6);
  background: rgba(255,255,255,0.03); border: 1px solid var(--border-hairline);
  color: var(--text-secondary); font-size: var(--text-sm); line-height: var(--leading-normal);
  border-radius: var(--r-lg) var(--r-lg) 0 var(--r-lg);
}

.chat-message--ai { width: 100%; }
.chat-message--ai .chat-content {
  font-family: var(--font-body); font-size: var(--chat-font-size); line-height: var(--chat-line-height);
  color: var(--text-primary); padding: var(--sp-4) 0; letter-spacing: var(--tracking-normal);
}

/* 史诗排版细节 */
.chat-content p { margin: 0 0 1.5em; overflow-wrap: anywhere; word-break: break-word; color: rgba(255,255,255,0.85); }
.chat-content strong { color: var(--text-primary); font-family: var(--font-title); font-weight: var(--fw-bold); }
.chat-content em { color: var(--text-secondary); font-style: italic; }

.think-block {
  margin: 0 0 var(--sp-6); border-left: 1px solid var(--border-subtle);
  padding-left: var(--sp-4); opacity: 0.7; transition: opacity 0.2s;
}
.think-block:hover { opacity: 1; }
.think-toggle {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-family: var(--font-title); font-size: var(--text-xs); color: var(--text-tertiary);
  letter-spacing: 2px; transition: color 0.2s;
}
.think-toggle:hover { color: var(--text-secondary); }
.think-arrow { font-size: 10px; transition: transform 0.2s; }
.think-body {
  margin-top: 12px; color: var(--text-secondary); line-height: 1.8;
  font-family: var(--font-brush); font-size: 0.95em; white-space: pre-wrap;
}
.think-collapsed .think-body { display: none; }
.think-collapsed .think-arrow { transform: rotate(-90deg); }

/* Streaming 呼吸感 */
.chat-message--ai.is-streaming .chat-content { animation: text-breathe 2s ease-in-out infinite; }
@keyframes text-breathe { 0%, 100% { opacity: 1; } 50% { opacity: 0.8; } }

/* ── 行动选项 (Cinematic Tanzaku) ──── */
.action-option {
  display: block; width: fit-content; margin: 12px 0; padding: 12px 24px;
  background: transparent; border: 1px solid var(--border-subtle);
  border-radius: var(--r-full); color: var(--text-secondary);
  font-family: var(--font-title); font-size: var(--text-sm); letter-spacing: 1px;
  cursor: pointer; transition: all 0.2s var(--ease-out);
}
.action-option:hover {
  color: var(--text-primary); background: rgba(255,255,255,0.05);
  border-color: var(--text-primary); transform: translateX(4px);
}
.action-option__icon { display: none; }
.is-processing .action-option { pointer-events: none; opacity: 0.3; filter: grayscale(1); }

/* ── Input Area (沉浸式书写区: Floating Glass Island) ──── */
.chat-input-area {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: var(--sp-6) var(--sp-8) calc(var(--sp-10) + var(--statusbar-h)); /* 提升底部留白，制造悬浮感 */
  background: linear-gradient(to top, rgba(3,4,6,0.95) 10%, rgba(3,4,6,0.5) 60%, transparent);
  display: flex; justify-content: center; pointer-events: none;
}

.input-wrapper {
  pointer-events: auto; display: flex; gap: var(--sp-3); width: 100%; max-width: var(--chat-max-w);
  background: rgba(11, 14, 19, 0.65); 
  backdrop-filter: var(--blur-xl); -webkit-backdrop-filter: var(--blur-xl);
  border: none; border-radius: 20px;
  padding: 8px 12px; 
  box-shadow: var(--shadow-lg), var(--shadow-inner); 
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.input-wrapper:focus-within {
  background: rgba(11, 14, 19, 0.85);
  box-shadow: var(--shadow-lg), var(--shadow-inner-hover);
  transform: translateY(-2px);
}

#chat-input {
  flex: 1; padding: 12px 16px; background: transparent; border: none;
  color: var(--text-primary); font-size: var(--text-md); font-family: var(--font-body);
  line-height: 1.6; resize: none; min-height: 48px; max-height: 240px; outline: none;
}
#chat-input::placeholder { color: var(--text-tertiary); font-family: var(--font-title); font-style: italic; letter-spacing: 1px; }

#btn-send {
  padding: 0 24px; 
  background: linear-gradient(135deg, #FF512F 0%, #F09819 100%); 
  color: var(--c-void);
  font-family: var(--font-title); font-size: var(--text-sm); font-weight: var(--fw-bold); letter-spacing: 2px;
  border-radius: 14px; transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1); 
  box-shadow: var(--shadow-glow-strong);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: none;
}
#btn-send:hover { 
  background: linear-gradient(135deg, #FF6A4D 0%, #F5AB3A 100%); 
  transform: translateY(-1px); 
  box-shadow: 0 6px 20px 0 rgba(255, 81, 47, 0.6); 
}
#btn-send:active { transform: scale(0.96); box-shadow: 0 2px 8px 0 rgba(255, 81, 47, 0.3); }
#btn-send:disabled { opacity: 0.3; filter: grayscale(1); cursor: not-allowed; transform: none; box-shadow: none; background: rgba(255,255,255,0.1); color: var(--text-secondary); }
.is-processing #btn-send .icon { animation: spin 1s linear infinite; }

#btn-cancel {
  display: none; padding: 0 20px; background: transparent; color: var(--text-tertiary);
  font-family: var(--font-title); font-size: var(--text-xs); border: 1px solid var(--border-subtle);
  border-radius: var(--r-md); transition: all 0.2s; align-items: center; justify-content: center; gap: 6px;
}
#btn-cancel:hover { color: var(--text-primary); border-color: var(--text-secondary); background: rgba(255,255,255,0.05); }
.is-processing #btn-cancel { display: inline-flex; }

/* ── Panel ──── */
.app-panel {
  width: var(--panel-w); flex-shrink: 0;
  background: rgba(7, 10, 14, 0.4); backdrop-filter: var(--blur-xl); -webkit-backdrop-filter: var(--blur-xl);
  border-left: 1px solid var(--border-hairline);
  transition: transform var(--dur-base) var(--ease-spring);
}
.app-panel.panel-open { transform: translateX(0); }
.app-panel--collapsed { width: 0; opacity: 0; border-left: none; pointer-events: none; }

/* ── Status Bar ──── */
.app-statusbar {
  position: absolute; bottom: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: center; gap: var(--sp-6);
  height: var(--statusbar-h); background: transparent; border-top: 1px solid rgba(244,241,234,0.05);
  font-size: 11px; font-family: var(--font-title); color: var(--text-tertiary); letter-spacing: 1px; flex-shrink: 0;
}
.app-statusbar .sep { width: 4px; height: 4px; border-radius: 50%; background: var(--border-subtle); }

/* ── Web Fullscreen (网页全屏) ──── */
body.web-fullscreen .app-statusbar { display: none !important; }
body.web-fullscreen .app-sidebar,
body.web-fullscreen .app-panel { opacity: 0; width: 0 !important; border: none; pointer-events: none; }

/* ── Immersive Fullscreen (屏幕全屏/极致沉浸) ──── */
body.immersive-fullscreen .app-topbar { display: none !important; }
body.immersive-fullscreen .app-statusbar { display: none !important; }
body.immersive-fullscreen .app-sidebar,
body.immersive-fullscreen .app-panel { opacity: 0; width: 0 !important; border: none; pointer-events: none; }
body.immersive-fullscreen .chat-messages { padding-top: var(--sp-8); }

/* ── Background Modes ──── */
:root {
  --default-bg-image: url("../img/bg-home-pc.png");
}

@media (max-width: 768px) {
  :root {
    --default-bg-image: url("../img/bg-home.png");
  }
}

body[data-bg-mode="none"]::before { display: none; }

body[data-bg-mode="image"] {
  background-image: 
    linear-gradient(rgba(0,0,0,calc(1 - var(--custom-bg-opacity, 0.72))), rgba(0,0,0,calc(1 - var(--custom-bg-opacity, 0.72)))),
    var(--custom-bg-image, var(--default-bg-image));
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-color: var(--custom-bg-color, #070a0e);
}

/* ── Responsive Mobile ──── */
@media (max-width: 768px) {
  :root { --topbar-h: 56px; --statusbar-h: 30px; }
  .app-sidebar { position: fixed; top: var(--topbar-h); left: 0; bottom: var(--statusbar-h); width: 85vw; transform: translateX(0); border-right: 1px solid rgba(244,241,234,0.1); z-index: var(--z-overlay); }
  .app-sidebar--collapsed { transform: translateX(-100%); opacity: 1; width: 85vw; }
  .app-panel { position: fixed; top: var(--topbar-h); right: 0; bottom: var(--statusbar-h); width: 85vw; transform: translateX(100%); z-index: var(--z-overlay); }
  .app-panel.panel-open { transform: translateX(0); opacity: 1; pointer-events: auto; }
  .app-panel--collapsed { transform: translateX(100%); opacity: 1; width: 85vw; pointer-events: none; }
  
  .chat-messages { padding: var(--sp-6) var(--sp-4) calc(100px + env(safe-area-inset-bottom, 0px)); }
  .chat-input-area { 
    padding: var(--sp-4); 
    padding-bottom: calc(var(--sp-4) + env(safe-area-inset-bottom, 0px)); 
  }
  .input-wrapper { border-radius: var(--r-lg); }
  #btn-send { min-width: 60px; padding: 0 16px; }
  
  /* 允许手机端顶部按钮栏横向滑动，防止按钮被挤出或缩水，保留全部按钮 */
  .topbar-right {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* 隐藏 Firefox 滚动条 */
    margin-left: auto;
    max-width: calc(100% - 60px); /* 留出左侧 Logo 空间 */
  }
  .topbar-right::-webkit-scrollbar {
    display: none; /* 隐藏 Chrome/Safari 滚动条 */
  }
  .topbar-btn,
  .topbar-divider {
    flex-shrink: 0 !important;
  }
  
  .app-statusbar {
    height: calc(var(--statusbar-h) + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  
  .mobile-scrim { display: block; position: fixed; inset: var(--topbar-h) 0 0; background: rgba(0,0,0,0.6); opacity: 0; pointer-events: none; transition: opacity 0.3s; z-index: calc(var(--z-overlay) - 1); }
  .mobile-scrim.is-visible { opacity: 1; pointer-events: auto; }
}

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