/* ============================================
   思远恒 v4.0 PRO - 色彩引擎 & 动态UI
   ============================================ */

/* 色彩引擎：通过 [data-theme] 属性切换整套配色 */
:root {
  --v4-bg: #0E1118;
  --v4-card: #161B22;
  --v4-card-hover: #1C2330;
  --v4-text: #E8E6E3;
  --v4-text-dim: #8B949E;
  --v4-text-mute: #6E7681;
  --v4-gold: #D4A574;
  --v4-gold-glow: rgba(212,165,116,0.3);
  --v4-border: #21262D;
  --v4-border-light: #30363D;
  --v4-success: #3FB950;
  --v4-error: #F85149;
  --v4-warning: #D29922;
  --v4-info: #58A6FF;
  --v4-radius: 12px;
  --v4-radius-sm: 8px;
  --v4-shadow: 0 4px 24px rgba(0,0,0,0.4);
  --v4-shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --v4-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 主题：深夜琥珀（默认） */
[data-theme="dark"] {
  --v4-bg: #0E1118; --v4-card: #161B22; --v4-card-hover: #1C2330;
  --v4-text: #E8E6E3; --v4-text-dim: #8B949E; --v4-text-mute: #6E7681;
  --v4-gold: #D4A574; --v4-gold-glow: rgba(212,165,116,0.3); --v4-border: #21262D;
}
/* 主题：清晨微光 */
[data-theme="light"] {
  --v4-bg: #F8F9FA; --v4-card: #FFFFFF; --v4-card-hover: #F0F2F5;
  --v4-text: #1A1A2E; --v4-text-dim: #6C757D; --v4-text-mute: #ADB5BD;
  --v4-gold: #C4956A; --v4-gold-glow: rgba(196,149,106,0.2); --v4-border: #E9ECEF;
}
/* 主题：落日余晖 */
[data-theme="sunset"] {
  --v4-bg: #1A0F0A; --v4-card: #2A1810; --v4-card-hover: #352015;
  --v4-text: #FFF0E0; --v4-text-dim: #B8A090; --v4-text-mute: #8A7565;
  --v4-gold: #FF8C42; --v4-gold-glow: rgba(255,140,66,0.3); --v4-border: #3D2817;
}
/* 主题：深海蓝调 */
[data-theme="ocean"] {
  --v4-bg: #0A1628; --v4-card: #112240; --v4-card-hover: #1A3050;
  --v4-text: #E6F1FF; --v4-text-dim: #8892B0; --v4-text-mute: #5C6B85;
  --v4-gold: #64FFDA; --v4-gold-glow: rgba(100,255,218,0.3); --v4-border: #1D3557;
}
/* 主题：翡翠森林 */
[data-theme="forest"] {
  --v4-bg: #0D1F12; --v4-card: #162A1E; --v4-card-hover: #1E3828;
  --v4-text: #E8F5E9; --v4-text-dim: #81C784; --v4-text-mute: #5A8A5E;
  --v4-gold: #A5D6A7; --v4-gold-glow: rgba(165,214,167,0.3); --v4-border: #1B3A24;
}
/* 主题：皇家紫晶 */
[data-theme="royal"] {
  --v4-bg: #120A1F; --v4-card: #1E1230; --v4-card-hover: #281A40;
  --v4-text: #F3E8FF; --v4-text-dim: #B39DDB; --v4-text-mute: #7E6BA0;
  --v4-gold: #CE93D8; --v4-gold-glow: rgba(206,147,216,0.3); --v4-border: #2D1F45;
}
/* 主题：玫瑰金粉 */
[data-theme="rose"] {
  --v4-bg: #1A0F14; --v4-card: #2A1820; --v4-card-hover: #352028;
  --v4-text: #FFF0F5; --v4-text-dim: #E8A0B8; --v4-text-mute: #B07088;
  --v4-gold: #F48FB1; --v4-gold-glow: rgba(244,143,177,0.3); --v4-border: #3D2028;
}
/* 主题：赛博朋克 */
[data-theme="cyberpunk"] {
  --v4-bg: #0D0221; --v4-card: #1A0B2E; --v4-card-hover: #251040;
  --v4-text: #E0FFFF; --v4-text-dim: #00FFFF; --v4-text-mute: #FF00FF;
  --v4-gold: #00FFFF; --v4-gold-glow: rgba(0,255,255,0.3); --v4-border: #2D1B4E;
}
/* 主题：午夜蓝 */
[data-theme="midnight"] {
  --v4-bg: #03071E; --v4-card: #0A1128; --v4-card-hover: #111A33;
  --v4-text: #E8EEF9; --v4-text-dim: #7D8CC4; --v4-text-mute: #5A6A9A;
  --v4-gold: #FFBA08; --v4-gold-glow: rgba(255,186,8,0.3); --v4-border: #1C2541;
}
/* 主题：秋日暖阳 */
[data-theme="autumn"] {
  --v4-bg: #1A120B; --v4-card: #2A1F14; --v4-card-hover: #382A1C;
  --v4-text: #FFF5E6; --v4-text-dim: #D4A574; --v4-text-mute: #A0784A;
  --v4-gold: #E87022; --v4-gold-glow: rgba(232,112,34,0.3); --v4-border: #3D2E1C;
}
/* 主题：薄荷清新 */
[data-theme="mint"] {
  --v4-bg: #0A1F1A; --v4-card: #112A22; --v4-card-hover: #18382D;
  --v4-text: #E0FFF5; --v4-text-dim: #7FD8BE; --v4-text-mute: #5AB09A;
  --v4-gold: #48E5C2; --v4-gold-glow: rgba(72,229,194,0.3); --v4-border: #1A3D30;
}
/* 主题：极简黑白 */
[data-theme="monochrome"] {
  --v4-bg: #121212; --v4-card: #1E1E1E; --v4-card-hover: #2A2A2A;
  --v4-text: #F5F5F5; --v4-text-dim: #A0A0A0; --v4-text-mute: #707070;
  --v4-gold: #FFFFFF; --v4-gold-glow: rgba(255,255,255,0.2); --v4-border: #333333;
}

/* 自定义主题（通过JS设置CSS变量） */
[data-theme="custom"] {
  --v4-bg: var(--custom-bg, #0E1118);
  --v4-card: var(--custom-card, #161B22);
  --v4-text: var(--custom-text, #E8E6E3);
  --v4-text-dim: var(--custom-dim, #8B949E);
  --v4-gold: var(--custom-gold, #D4A574);
  --v4-border: var(--custom-border, #21262D);
}

/* 渐变背景模式 */
body.v4-gradient {
  background: linear-gradient(135deg, var(--v4-bg) 0%, var(--v4-card) 50%, var(--v4-bg) 100%);
  background-attachment: fixed;
}
body.v4-gradient .v4-nav {
  background: rgba(14,17,24,0.7);
}

/* v4 全局应用 */
body.v4-active {
  background: var(--v4-bg);
  color: var(--v4-text);
  transition: var(--v4-transition);
}
/* v4激活时隐藏旧版导航 */
body.v4-active .nav { display: none !important; }

/* v4 导航栏 */
.v4-nav {
  background: rgba(14,17,24,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--v4-border);
  position: sticky; top: 0; z-index: 1000;
  transition: var(--v4-transition);
}
[data-theme="light"] .v4-nav { background: rgba(255,255,255,0.9); }

.v4-nav-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 64px;
}
.v4-nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--v4-text); }
.v4-nav-brand .logo {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--v4-gold), var(--v4-gold-glow));
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 18px; color: var(--v4-bg);
}
.v4-nav-brand .brand-text b { font-size: 16px; display: block; }
.v4-nav-brand .brand-text span { font-size: 10px; color: var(--v4-text-dim); letter-spacing: 1px; }

.v4-nav-links { display: flex; align-items: center; gap: 4px; }
.v4-nav-links a {
  color: var(--v4-text-dim); text-decoration: none; font-size: 14px;
  padding: 8px 14px; border-radius: var(--v4-radius-sm); transition: var(--v4-transition);
}
.v4-nav-links a:hover { color: var(--v4-text); background: var(--v4-card-hover); }
.v4-nav-links a.active { color: var(--v4-gold); background: var(--v4-gold-glow); }

.v4-nav-right { display: flex; align-items: center; gap: 8px; }

/* 主题切换按钮 */
.v4-theme-btn {
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--v4-border);
  background: var(--v4-card); color: var(--v4-text-dim); cursor: pointer;
  display: flex; align-items: center; justify-content: center; font-size: 16px;
  transition: var(--v4-transition);
}
.v4-theme-btn:hover { border-color: var(--v4-gold); color: var(--v4-gold); transform: rotate(20deg); }

/* 主题选择面板 */
.v4-theme-panel {
  position: absolute; top: 70px; right: 24px; width: 240px;
  background: var(--v4-card); border: 1px solid var(--v4-border);
  border-radius: var(--v4-radius); box-shadow: var(--v4-shadow-lg);
  padding: 16px; z-index: 1001; display: none;
  animation: panelIn 0.2s ease;
}
.v4-theme-panel.show { display: block; }
@keyframes panelIn { from { opacity:0; transform: translateY(-8px); } to { opacity:1; transform: translateY(0); } }
.v4-theme-panel h4 { font-size: 13px; color: var(--v4-text-dim); margin: 0 0 12px; text-transform: uppercase; letter-spacing: 1px; }
.v4-theme-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.v4-theme-option {
  padding: 10px; border-radius: var(--v4-radius-sm); cursor: pointer;
  border: 2px solid transparent; transition: var(--v4-transition); text-align: center;
}
.v4-theme-option:hover { border-color: var(--v4-border-light); }
.v4-theme-option.active { border-color: var(--v4-gold); }
.v4-theme-option .preview {
  width: 100%; height: 32px; border-radius: 6px; margin-bottom: 6px;
}
.v4-theme-option .name { font-size: 11px; color: var(--v4-text-dim); }

/* 色彩引擎2.0 - 自定义主题 */
.v4-theme-custom {
  margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--v4-border);
}
.v4-theme-custom h5 { font-size: 11px; color: var(--v4-text-dim); text-transform: uppercase; letter-spacing: 1px; margin: 0 0 8px; }
.v4-color-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.v4-color-row label { font-size: 11px; color: var(--v4-text-dim); width: 50px; flex-shrink: 0; }
.v4-color-row input[type="color"] {
  width: 28px; height: 28px; border: none; border-radius: 6px; cursor: pointer;
  background: transparent; padding: 0;
}
.v4-color-row input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.v4-color-row input[type="color"]::-webkit-color-swatch { border: 1px solid var(--v4-border); border-radius: 4px; }
.v4-theme-actions { display: flex; gap: 6px; margin-top: 10px; }
.v4-theme-actions button {
  flex: 1; padding: 6px; font-size: 11px; border-radius: 6px; border: 1px solid var(--v4-border);
  background: var(--v4-bg); color: var(--v4-text-dim); cursor: pointer; transition: var(--v4-transition);
}
.v4-theme-actions button:hover { border-color: var(--v4-gold); color: var(--v4-gold); }
.v4-gradient-toggle {
  display: flex; align-items: center; gap: 8px; margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--v4-border);
  font-size: 12px; color: var(--v4-text-dim); cursor: pointer;
}
.v4-gradient-toggle input[type="checkbox"] { accent-color: var(--v4-gold); }

/* 用户菜单 */
.v4-user-btn {
  display: flex; align-items: center; gap: 8px; padding: 6px 12px 6px 6px;
  border-radius: 20px; border: 1px solid var(--v4-border); background: var(--v4-card);
  cursor: pointer; transition: var(--v4-transition); color: var(--v4-text);
}
.v4-user-btn:hover { border-color: var(--v4-gold); }
.v4-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--v4-gold), var(--v4-gold-glow));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; color: var(--v4-bg);
}
.v4-user-name { font-size: 13px; max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.v4-user-menu {
  position: absolute; top: 70px; right: 24px; width: 220px;
  background: var(--v4-card); border: 1px solid var(--v4-border);
  border-radius: var(--v4-radius); box-shadow: var(--v4-shadow-lg);
  padding: 8px; z-index: 1001; display: none; animation: panelIn 0.2s ease;
}
.v4-user-menu.show { display: block; }
.v4-user-menu .menu-header { padding: 12px; border-bottom: 1px solid var(--v4-border); margin-bottom: 4px; }
.v4-user-menu .menu-header .name { font-weight: 600; font-size: 14px; }
.v4-user-menu .menu-header .email { font-size: 12px; color: var(--v4-text-dim); }
.v4-user-menu a {
  display: block; padding: 10px 12px; border-radius: var(--v4-radius-sm);
  color: var(--v4-text-dim); text-decoration: none; font-size: 14px; transition: var(--v4-transition);
}
.v4-user-menu a:hover { background: var(--v4-card-hover); color: var(--v4-text); }
.v4-user-menu .menu-divider { height: 1px; background: var(--v4-border); margin: 4px 0; }
.v4-user-menu .logout { color: var(--v4-error); }

/* 登录/注册弹窗 */
.v4-modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  z-index: 2000; display: none; align-items: center; justify-content: center;
  animation: fadeIn 0.2s ease;
}
.v4-modal-overlay.show { display: flex; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.v4-modal {
  background: var(--v4-card); border: 1px solid var(--v4-border);
  border-radius: 16px; width: 400px; max-width: 90vw; padding: 32px;
  box-shadow: var(--v4-shadow-lg); animation: modalIn 0.3s cubic-bezier(0.4,0,0.2,1);
}
@keyframes modalIn { from { opacity:0; transform: scale(0.95) translateY(10px); } to { opacity:1; transform: scale(1) translateY(0); } }
.v4-modal h2 { font-size: 22px; margin: 0 0 6px; }
.v4-modal .modal-sub { font-size: 13px; color: var(--v4-text-dim); margin-bottom: 24px; }
.v4-modal .tabs { display: flex; gap: 0; margin-bottom: 24px; border-bottom: 1px solid var(--v4-border); }
.v4-modal .tab {
  flex: 1; padding: 10px; text-align: center; cursor: pointer;
  font-size: 14px; color: var(--v4-text-dim); border-bottom: 2px solid transparent; transition: var(--v4-transition);
}
.v4-modal .tab.active { color: var(--v4-gold); border-bottom-color: var(--v4-gold); }
.v4-form-group { margin-bottom: 16px; }
.v4-form-group label { display: block; font-size: 13px; color: var(--v4-text-dim); margin-bottom: 6px; }
.v4-form-group input {
  width: 100%; padding: 12px 14px; border-radius: var(--v4-radius-sm);
  border: 1px solid var(--v4-border); background: var(--v4-bg); color: var(--v4-text);
  font-size: 14px; box-sizing: border-box; transition: var(--v4-transition);
}
.v4-form-group input:focus { outline: none; border-color: var(--v4-gold); box-shadow: 0 0 0 3px var(--v4-gold-glow); }
.v4-btn-primary {
  width: 100%; padding: 12px; border: none; border-radius: var(--v4-radius-sm);
  background: linear-gradient(135deg, var(--v4-gold), var(--v4-gold-glow));
  color: var(--v4-bg); font-size: 15px; font-weight: 600; cursor: pointer; transition: var(--v4-transition);
}
.v4-btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 16px var(--v4-gold-glow); }
.v4-btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.v4-modal .modal-note { font-size: 12px; color: var(--v4-text-mute); text-align: center; margin-top: 16px; }
.v4-modal .modal-error { color: var(--v4-error); font-size: 13px; margin-top: 12px; text-align: center; min-height: 18px; }
.v4-modal-close {
  position: absolute; top: 16px; right: 16px; width: 32px; height: 32px;
  border: none; background: transparent; color: var(--v4-text-dim); font-size: 20px;
  cursor: pointer; border-radius: 50%; transition: var(--v4-transition);
}
.v4-modal-close:hover { background: var(--v4-card-hover); color: var(--v4-text); }

/* 聊天页面 */
.v4-chat-container {
  max-width: 900px; margin: 0 auto; padding: 24px;
  display: grid; grid-template-columns: 200px 1fr; gap: 16px; height: calc(100vh - 120px);
}
.v4-chat-rooms {
  background: var(--v4-card); border: 1px solid var(--v4-border); border-radius: var(--v4-radius);
  padding: 12px; overflow-y: auto;
}
.v4-chat-rooms h3 { font-size: 13px; color: var(--v4-text-dim); text-transform: uppercase; letter-spacing: 1px; margin: 0 0 12px; padding: 0 8px; }
.v4-room-item {
  padding: 10px 12px; border-radius: var(--v4-radius-sm); cursor: pointer;
  color: var(--v4-text-dim); font-size: 14px; transition: var(--v4-transition); margin-bottom: 2px;
}
.v4-room-item:hover { background: var(--v4-card-hover); color: var(--v4-text); }
.v4-room-item.active { background: var(--v4-gold-glow); color: var(--v4-gold); font-weight: 600; }

.v4-chat-main {
  background: var(--v4-card); border: 1px solid var(--v4-border); border-radius: var(--v4-radius);
  display: flex; flex-direction: column; overflow: hidden;
}
.v4-chat-header {
  padding: 16px 20px; border-bottom: 1px solid var(--v4-border);
  display: flex; align-items: center; justify-content: space-between;
}
.v4-chat-header h3 { margin: 0; font-size: 16px; }
.v4-chat-messages { flex: 1; overflow-y: auto; padding: 20px; }
.v4-msg { margin-bottom: 16px; animation: msgIn 0.3s ease; }
@keyframes msgIn { from { opacity:0; transform: translateY(8px); } to { opacity:1; transform: translateY(0); } }
.v4-msg .msg-meta { font-size: 12px; color: var(--v4-text-dim); margin-bottom: 4px; }
.v4-msg .msg-meta .msg-user { color: var(--v4-gold); font-weight: 600; margin-right: 8px; }
.v4-msg .msg-content {
  background: var(--v4-card-hover); padding: 10px 14px; border-radius: var(--v4-radius-sm);
  font-size: 14px; line-height: 1.5; display: inline-block; max-width: 80%; word-break: break-word;
}
.v4-msg.own .msg-content { background: var(--v4-gold-glow); }
.v4-chat-input {
  padding: 16px; border-top: 1px solid var(--v4-border); display: flex; gap: 10px;
}
.v4-chat-input input {
  flex: 1; padding: 12px 16px; border-radius: var(--v4-radius-sm);
  border: 1px solid var(--v4-border); background: var(--v4-bg); color: var(--v4-text); font-size: 14px;
}
.v4-chat-input input:focus { outline: none; border-color: var(--v4-gold); }
.v4-chat-input button {
  padding: 12px 24px; border: none; border-radius: var(--v4-radius-sm);
  background: var(--v4-gold); color: var(--v4-bg); font-weight: 600; cursor: pointer; font-size: 14px;
}
.v4-chat-input button:disabled { opacity: 0.5; cursor: not-allowed; }

/* AUTO 套件页面 */
.v4-auto-grid {
  max-width: 1200px; margin: 0 auto; padding: 40px 24px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px;
}
.v4-auto-card {
  background: var(--v4-card); border: 1px solid var(--v4-border); border-radius: var(--v4-radius);
  padding: 24px; cursor: pointer; transition: var(--v4-transition);
}
.v4-auto-card:hover { border-color: var(--v4-gold); transform: translateY(-4px); box-shadow: var(--v4-shadow); }
.v4-auto-card .icon { font-size: 36px; margin-bottom: 12px; }
.v4-auto-card h3 { font-size: 18px; margin: 0 0 8px; }
.v4-auto-card p { font-size: 13px; color: var(--v4-text-dim); margin: 0; line-height: 1.6; }

.v4-tool-panel {
  max-width: 800px; margin: 0 auto; padding: 40px 24px;
}
.v4-tool-panel .back-btn {
  display: inline-flex; align-items: center; gap: 6px; color: var(--v4-text-dim);
  text-decoration: none; font-size: 14px; margin-bottom: 20px; cursor: pointer;
}
.v4-tool-panel .back-btn:hover { color: var(--v4-gold); }
.v4-tool-box {
  background: var(--v4-card); border: 1px solid var(--v4-border); border-radius: var(--v4-radius);
  padding: 28px;
}
.v4-tool-box h2 { margin: 0 0 20px; font-size: 22px; }
.v4-tool-result {
  margin-top: 16px; padding: 16px; background: var(--v4-bg); border-radius: var(--v4-radius-sm);
  border: 1px solid var(--v4-border); font-family: monospace; font-size: 13px;
  white-space: pre-wrap; word-break: break-all; min-height: 40px;
}

/* 账户页面 */
.v4-account-container { max-width: 800px; margin: 0 auto; padding: 40px 24px; }
.v4-account-header {
  display: flex; align-items: center; gap: 20px; margin-bottom: 32px;
  background: var(--v4-card); border: 1px solid var(--v4-border); border-radius: var(--v4-radius); padding: 24px;
}
.v4-account-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  background: linear-gradient(135deg, var(--v4-gold), var(--v4-gold-glow));
  display: flex; align-items: center; justify-content: center; font-size: 28px; font-weight: 700; color: var(--v4-bg);
}
.v4-account-info h2 { margin: 0 0 4px; }
.v4-account-info .email { color: var(--v4-text-dim); font-size: 14px; }
.v4-account-info .role { display: inline-block; padding: 2px 10px; border-radius: 12px; background: var(--v4-gold-glow); color: var(--v4-gold); font-size: 11px; margin-top: 6px; }

.v4-account-section {
  background: var(--v4-card); border: 1px solid var(--v4-border); border-radius: var(--v4-radius);
  padding: 24px; margin-bottom: 20px;
}
.v4-account-section h3 { font-size: 16px; margin: 0 0 16px; padding-bottom: 12px; border-bottom: 1px solid var(--v4-border); }
.v4-activity-item {
  display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--v4-border);
  font-size: 13px;
}
.v4-activity-item:last-child { border-bottom: none; }
.v4-activity-item .action { color: var(--v4-text); }
.v4-activity-item .time { color: var(--v4-text-dim); font-size: 12px; }

/* 响应式 */
@media (max-width: 768px) {
  .v4-nav-links { display: none; }
  .v4-chat-container { grid-template-columns: 1fr; height: auto; }
  .v4-chat-rooms { display: flex; overflow-x: auto; padding: 8px; }
  .v4-chat-rooms h3 { display: none; }
  .v4-room-item { white-space: nowrap; }
  .v4-user-name { display: none; }
}