/* ==========================================================
   PotatC 服务器官网 —— 设计系统（浅色主题）
   配色灵感：白天的农场牧场 —— 暖白/米色背景 + 草地绿 + 阳光琥珀色。
   面板/卡片走柔和圆角+浅阴影的"纸感"，按钮/头像等交互元素保留
   硬边框+硬阴影的"像素方块"质感，两者形成对比，是整套设计的签名细节。
   ========================================================== */

:root {
  /* 色彩 */
  --bg: #f6f2e7;
  --bg-elevated: #fffdf8;
  --bg-panel: #ffffff;
  --border: #e3d9bf;
  --border-bright: #cdbd8e;
  --text: #2b2a1f;
  --text-dim: #625d47;
  --text-faint: #948d6f;
  --grass: #3f7d2c;
  --grass-bright: #57a13d;
  --grass-dark: #2e5d20;
  --soil: #8a5a34;
  --stone: #7d8577;
  --amber: #dd9a2e;
  --amber-bright: #eaac41;
  --amber-dark: #90601a;
  --danger: #c0413d;
  --danger-bright: #d65c58;
  --danger-dark: #9c322e;
  --shadow: #d9cca3;

  /* 字体 */
  --font-pixel: "Press Start 2P", "Noto Sans SC", monospace;
  --font-body: "Noto Sans SC", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  --radius: 6px;
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

body {
  background-image:
    radial-gradient(circle at 12% 0%, rgba(63,125,44,0.07), transparent 42%),
    radial-gradient(circle at 88% 15%, rgba(221,154,46,0.09), transparent 38%);
  background-attachment: fixed;
  min-height: 100vh;
}

a { color: var(--grass-dark); text-decoration: none; font-weight: 600; }
a:hover { color: var(--grass-bright); text-decoration: underline; }

h1, h2, h3 { font-family: var(--font-body); font-weight: 800; margin: 0 0 .5em; letter-spacing: .01em; color: #1f1e15; }
p { margin: 0 0 1em; color: var(--text-dim); }

::selection { background: var(--grass-bright); color: #fff; }

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* 细滚动条，贴合浅色主题 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 8px; border: 2px solid var(--bg); }

/* ---------------- 布局容器 ---------------- */
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,253,248,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(43,42,31,0.03);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; max-width: 960px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-pixel); font-size: 13px; color: var(--grass-dark);
  white-space: nowrap; font-weight: normal;
}
.brand:hover { color: var(--grass-bright); }
.brand-mark {
  width: 22px; height: 22px; flex: none;
  background: linear-gradient(135deg, var(--grass-bright) 0 50%, var(--grass) 50% 100%);
  box-shadow: inset -3px -3px 0 rgba(0,0,0,.18), inset 3px 3px 0 rgba(255,255,255,.35), 0 0 0 2px rgba(43,42,31,.08);
}
nav.main-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
nav.main-nav a { font-size: 14px; color: var(--text-dim); padding: 6px 4px; font-weight: 600; }
nav.main-nav a:hover { color: var(--grass-dark); text-decoration: none; }
nav.main-nav .who { font-size: 13px; color: var(--text-faint); font-family: var(--font-mono); margin-right: 4px; font-weight: 400; }

/* ---------------- 按钮（保留硬边框 + 硬阴影的方块质感） ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-body); font-weight: 700; font-size: 14px;
  padding: 10px 18px; cursor: pointer;
  background: var(--bg-panel); color: var(--text);
  border: 2px solid var(--border-bright);
  box-shadow: 3px 3px 0 var(--shadow);
  transition: transform .06s ease, box-shadow .06s ease, background .12s ease;
  user-select: none;
}
.btn:hover { color: var(--text); text-decoration: none; border-color: var(--grass-bright); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--shadow); }
.btn:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; transform: none; }

.btn-primary { background: var(--grass); border-color: var(--grass-dark); color: #fdfaf1; }
.btn-primary:hover { background: var(--grass-bright); color: #fff; }

.btn-amber { background: var(--amber); border-color: var(--amber-dark); color: #2b2018; }
.btn-amber:hover { background: var(--amber-bright); color: #2b2018; }

.btn-danger { background: var(--danger); border-color: var(--danger-dark); color: #fdf3f2; }
.btn-danger:hover { background: var(--danger-bright); color: #fff; }

.btn-ghost { background: var(--bg-panel); box-shadow: none; border-color: var(--border); }
.btn-ghost:hover { border-color: var(--grass-bright); background: #f4f8ef; }

.btn-sm { padding: 6px 10px; font-size: 12.5px; }

/* ---------------- 表单 ---------------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 6px; font-weight: 600; }
input[type="text"], input[type="password"], textarea {
  width: 100%; font-family: var(--font-body); font-size: 15px;
  background: var(--bg-elevated); color: var(--text);
  border: 1.5px solid var(--border); border-radius: var(--radius);
  padding: 10px 12px;
}
input:focus, textarea:focus { border-color: var(--grass-bright); }
textarea { resize: vertical; min-height: 90px; }

/* ---------------- 卡片 / 面板（柔和圆角 + 轻阴影，与按钮的硬边框形成对比） ---------------- */
.panel {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; margin-bottom: 20px;
  box-shadow: 0 2px 10px rgba(43,42,31,0.05);
}
.panel-title { font-size: 13px; font-family: var(--font-pixel); color: var(--grass-dark); letter-spacing: .04em; margin-bottom: 14px; }

/* ---------------- Hero ---------------- */
.hero { padding: 56px 0 36px; }
.hero-eyebrow {
  font-family: var(--font-pixel); font-size: 11px; color: var(--grass-dark);
  letter-spacing: .06em; margin-bottom: 16px; display: inline-block;
  background: #eaf3e2; padding: 5px 10px; border-radius: 4px;
}
.hero h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.15; color: #1f1e15; }
.hero .tagline { font-size: 17px; max-width: 56ch; }

.server-card {
  display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  background: var(--bg-elevated); border: 1.5px solid var(--soil); border-radius: var(--radius);
  padding: 16px 20px; margin: 22px 0;
  box-shadow: 0 2px 10px rgba(138,90,52,0.08);
}
.server-card .addr { font-family: var(--font-mono); font-size: 17px; color: var(--soil); font-weight: 600; }
.server-card .label { font-size: 12px; color: var(--text-faint); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 4px; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 10px; }

/* ---------------- 公告板 ---------------- */
.board { margin: 36px 0; }
.board h2 { font-size: 19px; }
.announcement {
  border-left: 4px solid var(--amber);
  background: var(--bg-panel); border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: 0 1px 6px rgba(43,42,31,0.04);
  padding: 14px 18px; margin-bottom: 14px;
}
.announcement .meta { font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); margin-bottom: 6px; }
.announcement h3 { font-size: 16px; color: #1f1e15; }
.announcement .body-text { color: var(--text-dim); white-space: pre-wrap; margin: 0; }
.empty-hint { color: var(--text-faint); font-size: 14px; padding: 20px 0; }

/* ---------------- 聊天室 ---------------- */
.chat-shell { display: flex; flex-direction: column; height: calc(100vh - 64px); background: var(--bg); }
.chat-banner {
  background: var(--danger); color: #fff; font-weight: 700; font-size: 14px;
  text-align: center; padding: 8px 12px;
}
.chat-list {
  flex: 1; overflow-y: auto; padding: 18px 0;
}
.msg { display: flex; gap: 12px; padding: 9px 0; align-items: flex-start; }
.msg .avatar {
  flex: none; width: 36px; height: 36px; image-rendering: pixelated;
  border: 1px solid var(--border); background: var(--bg-elevated);
}
.msg .msg-main { flex: 1; min-width: 0; }
.msg .msg-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.msg .msg-user { font-weight: 700; color: var(--grass-dark); font-size: 14px; }
.msg .msg-time { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-faint); }
.msg .msg-text { margin: 3px 0 0; white-space: pre-wrap; word-break: break-word; color: var(--text); }
.msg .msg-img { max-width: 260px; max-height: 260px; border: 1.5px solid var(--border); border-radius: var(--radius); margin-top: 6px; display: block; }
.msg .msg-del { font-size: 11.5px; color: var(--text-faint); background: none; border: none; cursor: pointer; padding: 3px 0; font-weight: 600; }
.msg .msg-del:hover { color: var(--danger-bright); }
.msg.own .msg-user { color: var(--amber-dark); }

/* 管理员标签 —— 聊天室里的签名细节之一 */
.admin-tag {
  display: inline-block; font-family: var(--font-pixel); font-size: 9px;
  color: var(--amber-dark); background: #fbeed0; border: 1px solid var(--amber);
  padding: 2px 6px; border-radius: 3px; letter-spacing: .02em; line-height: 1;
  transform: translateY(-1px);
}

.chat-composer {
  border-top: 1px solid var(--border); background: var(--bg-elevated);
  padding: 12px 0 18px;
}
.composer-row { display: flex; gap: 10px; align-items: flex-end; }
.composer-row textarea { flex: 1; min-height: 44px; max-height: 140px; }
.image-preview { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.image-preview img { width: 56px; height: 56px; object-fit: cover; border: 1.5px solid var(--border); border-radius: 4px; }
.image-preview .remove-img { font-size: 12px; color: var(--danger-bright); background: none; border: none; cursor: pointer; font-weight: 600; }
.file-btn { position: relative; overflow: hidden; }
.file-btn input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

/* ---------------- 方块头像识别码（signature 元素） ---------------- */
.pixel-id { display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr); width: 100%; height: 100%; background: var(--bg-elevated); }
.pixel-id i { display: block; }

/* ---------------- 提示 / Toast ---------------- */
.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: #2b2a1f; color: #fdfaf1; border-radius: var(--radius);
  padding: 10px 18px; font-size: 14px; box-shadow: 0 6px 20px rgba(43,42,31,0.25);
  z-index: 100; opacity: 0; pointer-events: none; transition: opacity .2s ease;
}
.toast.show { opacity: 1; }
.toast.error { background: var(--danger-dark); }

/* ---------------- 表格（后台） ---------------- */
table.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data-table th, table.data-table td {
  text-align: left; padding: 10px 10px; border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
table.data-table th { color: var(--text-faint); font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
table.data-table tr:hover td { background: #faf7ee; }
.badge { display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 3px; border: 1px solid var(--border-bright); color: var(--text-dim); }
.badge.admin { border-color: var(--amber); color: var(--amber-dark); background: #fbeed0; }
.badge.banned { border-color: var(--danger); color: var(--danger-dark); background: #fbe6e5; }
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* ---------------- 后台 Tab ---------------- */
.tabbar { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 22px; flex-wrap: wrap; }
.tabbar button {
  font-family: var(--font-body); font-weight: 700; font-size: 14px;
  background: none; border: none; color: var(--text-faint);
  padding: 10px 16px; cursor: pointer; border-bottom: 3px solid transparent; margin-bottom: -1px;
}
.tabbar button:hover { color: var(--grass-dark); }
.tabbar button.active { color: var(--amber-dark); border-color: var(--amber); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------------- 杂项 ---------------- */
.muted { color: var(--text-faint); font-size: 13px; }
.stack { display: flex; flex-direction: column; gap: 10px; }
.split { display: flex; gap: 24px; flex-wrap: wrap; }
.split > * { flex: 1; min-width: 260px; }
.footer { padding: 40px 0 60px; color: var(--text-faint); font-size: 13px; text-align: center; }
.center-card { max-width: 380px; margin: 64px auto; }

@media (max-width: 640px) {
  nav.main-nav .who { display: none; }
  .hero { padding: 40px 0 24px; }
  .msg .msg-img { max-width: 180px; max-height: 180px; }
}