:root {
  --bg: #f3f5f7;
  --surface: #ffffff;
  --surface-soft: #f7f9fb;
  --ink: #172b4d;
  --muted: #6b778c;
  --muted-soft: #8291a4;
  --line: #d8e0e8;
  --line-strong: #b9c9d8;
  --navy: #172b4d;
  --navy-2: #244566;
  --blue: #1769d1;
  --blue-soft: #eaf3ff;
  --green: #168257;
  --green-soft: #edf6f0;
  --gold: #9a701c;
  --gold-soft: #fff5d9;
  --red: #cf4b43;
  --red-soft: #fff1f0;
  --radius: 7px;
  --shadow: 0 2px 8px rgb(23 43 77 / 10%);
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg); }
body { min-height: 100dvh; margin: 0; color: var(--ink); background: var(--bg); font-family: "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 15px; }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }
input, select { outline: none; }
.hidden { display: none !important; }

/* Login: the same navy/blue language as CoderLand, without the Minecraft artwork. */
.login-shell { display: grid; min-height: 100dvh; grid-template-columns: minmax(360px, 1.08fr) minmax(390px, .92fr); background: var(--surface); }
.login-art { position: relative; display: flex; min-height: 100dvh; align-items: flex-end; overflow: hidden; padding: clamp(38px, 8vw, 110px); color: #fff; background: linear-gradient(145deg, #172b4d 0%, #244566 62%, #2f78b8 100%); }
.login-art::before, .login-art::after { position: absolute; inset: 0; content: ""; pointer-events: none; }
.login-art::before { opacity: .2; background-image: linear-gradient(rgb(255 255 255 / 20%) 1px, transparent 1px), linear-gradient(90deg, rgb(255 255 255 / 20%) 1px, transparent 1px); background-size: 32px 32px; mask-image: linear-gradient(135deg, #000, transparent 78%); }
.login-art::after { background: radial-gradient(circle at 78% 17%, rgb(89 184 255 / 40%), transparent 28%), linear-gradient(180deg, transparent 34%, rgb(7 19 38 / 55%)); }
.login-art-copy { position: relative; z-index: 1; max-width: 620px; }
.login-art-copy span { color: #9ed1ff; font-size: 13px; font-weight: 700; letter-spacing: .2em; }
.login-art-copy strong { display: block; margin-top: 16px; font-size: clamp(38px, 5vw, 72px); letter-spacing: -.055em; line-height: 1; }
.login-art-copy p { max-width: 410px; margin: 22px 0 0; color: #d8e7f4; font-size: 17px; line-height: 1.75; }
.login-card { width: min(100% - 88px, 450px); margin: auto; }
.eyebrow { margin: 0 0 11px; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .14em; line-height: 1.3; text-transform: uppercase; }
.eyebrow.green { color: var(--green); }
.eyebrow.gold { color: var(--gold); }
.eyebrow.blue { color: var(--blue); }
.login-card h1 { margin: 0; color: var(--ink); font-size: clamp(32px, 4vw, 46px); letter-spacing: -.055em; line-height: 1.1; }
.login-subtitle { margin: 16px 0 40px; color: var(--muted); font-size: 16px; line-height: 1.7; }
.field-label { display: block; margin: 20px 0 8px; color: #52677e; font-size: 14px; font-weight: 700; }
input, select { width: 100%; min-height: 46px; padding: 10px 13px; color: var(--ink); background: #fbfcfe; border: 1px solid #cbd7e2; border-radius: 5px; }
input::placeholder { color: #8b9aab; }
input:focus, select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgb(47 120 213 / 14%); }
.primary-button, .ghost-button, .logout-button, .quick-button, .icon-button { transition: transform .16s ease, background .16s ease, border-color .16s ease, color .16s ease; }
.primary-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 22px; padding: 11px 15px; color: #fff; background: var(--blue); border: 1px solid #115bac; border-radius: 5px; font-weight: 700; }
.primary-button:hover { background: #075fbe; transform: translateY(-1px); }
.primary-button b, .ghost-button b { font-size: 18px; font-weight: 500; line-height: 1; }
.primary-button.wide { width: 100%; margin-top: 28px; padding: 14px 17px; }
.ghost-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 20px; padding: 10px 14px; color: #31506e; background: var(--surface); border: 1px solid var(--line-strong); border-radius: 5px; font-weight: 700; }
.ghost-button:hover { color: var(--blue); background: var(--blue-soft); border-color: #8ab8ea; transform: translateY(-1px); }
.form-error { min-height: 20px; margin: 14px 0 0; color: var(--red); font-size: 13px; }
.login-foot { display: flex; align-items: center; gap: 9px; margin-top: 52px; color: var(--muted-soft); font-size: 13px; }
.status-dot, .pulse-dot, .mini-status { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgb(22 130 87 / 12%); }

/* App shell */
.app-shell { display: flex; min-height: 100dvh; background: var(--bg); }
.sidebar { position: sticky; top: 0; display: flex; flex: 0 0 264px; flex-direction: column; min-height: 100dvh; padding: 28px 18px 24px; color: #fff; background: var(--navy); }
.brand-block { display: flex; align-items: center; gap: 12px; padding: 0 12px 30px; border-bottom: 1px solid rgb(255 255 255 / 16%); }
.brand-block strong { display: block; font-size: 16px; letter-spacing: .13em; }
.brand-block small { display: block; margin-top: 5px; color: #a9bdd1; font-size: 11px; letter-spacing: .1em; }
.brand-icon { display: grid; width: 38px; height: 38px; place-items: center; color: var(--navy); background: #59b8ff; border-radius: 5px; box-shadow: 5px 5px 0 rgb(7 25 49 / 28%); font-size: 14px; font-weight: 900; letter-spacing: -.04em; }
.brand-icon::after { content: "CL"; }
.brand-icon span, .brand-icon i { display: none; }
.server-mini-card { display: flex; align-items: center; gap: 11px; margin-top: 21px; padding: 13px; background: rgb(255 255 255 / 8%); border: 1px solid rgb(255 255 255 / 14%); border-radius: 6px; }
.server-mini-card > div { min-width: 0; flex: 1; }
.server-mini-card strong { display: block; font-size: 14px; }
.server-mini-card small { display: block; margin-top: 5px; overflow: hidden; color: #a9bdd1; font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.icon-button { width: 30px; height: 30px; padding: 0; color: #a9d6fa; background: transparent; border: 0; border-radius: 4px; font-size: 22px; }
.icon-button:hover { color: #fff; background: rgb(255 255 255 / 12%); transform: rotate(35deg); }
.nav-list { display: grid; gap: 5px; margin-top: 30px; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 13px 14px; color: #bdc9d7; background: transparent; border: 0; border-radius: 5px; text-align: left; font-size: 15px; font-weight: 650; }
.nav-item:hover { color: #fff; background: rgb(255 255 255 / 9%); }
.nav-item.active { color: #fff; background: #2f78b8; box-shadow: inset 3px 0 #59b8ff; }
.nav-icon { display: inline-flex; width: 23px; align-items: center; justify-content: center; color: inherit; font-size: 19px; }
.sidebar-bottom { margin-top: auto; }
.server-version { padding: 19px 13px; border-top: 1px solid rgb(255 255 255 / 16%); }
.server-version span { display: block; color: #a9bdd1; font-size: 12px; }
.server-version strong { display: block; margin-top: 6px; color: #8fd0ff; font-size: 12px; }
.logout-button { display: flex; width: 100%; justify-content: space-between; padding: 11px 13px; color: #bdc9d7; background: transparent; border: 1px solid rgb(255 255 255 / 18%); border-radius: 5px; font-size: 14px; }
.logout-button:hover { color: #fff; background: rgb(255 255 255 / 9%); border-color: rgb(255 255 255 / 34%); }
.main-content { width: min(100%, 1400px); margin: 0 auto; padding: 34px clamp(22px, 4vw, 62px) 72px; }
.topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding-bottom: 30px; }
.topbar h2 { margin: 0; color: var(--ink); font-size: 34px; letter-spacing: -.05em; }
.top-actions { display: flex; align-items: center; gap: 18px; }
.last-updated { color: var(--muted-soft); font-size: 12px; }
.user-chip { display: flex; align-items: center; gap: 9px; padding: 5px 12px 5px 5px; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; font-size: 14px; }
.avatar { display: inline-flex; width: 28px; height: 28px; align-items: center; justify-content: center; color: #fff; background: var(--blue); border-radius: 50%; font-weight: 800; }
.hero-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 25px; padding: 28px 30px; overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-copy h3 { margin: 0; color: var(--ink); font-size: clamp(28px, 4vw, 40px); letter-spacing: -.06em; }
.hero-copy h3 em { color: var(--blue); font-style: normal; }
.hero-copy > p:last-child { margin: 12px 0 0; color: var(--muted); font-size: 15px; }
.hero-actions { display: flex; flex-shrink: 0; gap: 9px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 12px; }
.stat-card { position: relative; min-height: 148px; padding: 20px; overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.stat-card::after { position: absolute; right: -28px; bottom: -40px; width: 112px; height: 112px; border: 1px solid currentColor; border-radius: 50%; opacity: .1; box-shadow: 0 0 0 18px rgb(23 43 77 / 2%), 0 0 0 36px rgb(23 43 77 / 2%); content: ""; }
.accent-green { color: var(--green); }
.accent-gold { color: var(--gold); }
.accent-blue { color: var(--blue); }
.accent-purple { color: #6c55aa; }
.stat-label { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 14px; }
.stat-label .pulse-dot { width: 7px; height: 7px; margin-right: auto; margin-left: 9px; }
.stat-symbol { color: currentColor; font-size: 20px; }
.stat-main { position: relative; z-index: 1; margin-top: 17px; color: var(--ink); font-size: 32px; font-weight: 750; letter-spacing: -.06em; }
.stat-main small { color: var(--muted); font-size: 15px; letter-spacing: 0; }
.stat-foot { position: relative; z-index: 1; margin-top: 9px; overflow: hidden; color: var(--muted-soft); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.content-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 12px; margin-top: 12px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.player-panel, .server-panel { min-height: 290px; padding: 25px; }
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.panel-heading h3 { margin: 0; color: var(--ink); font-size: 21px; letter-spacing: -.035em; }
.panel-heading > span { color: var(--muted-soft); font-size: 13px; }
.count-badge, .ready-badge { padding: 6px 8px; color: var(--green); background: var(--green-soft); border: 1px solid #c6ddcd; border-radius: 4px; font-size: 11px; font-weight: 700; }
.ready-badge { color: var(--green); }
.player-list { display: grid; gap: 8px; margin-top: 24px; }
.player-row { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 12px; background: var(--surface-soft); border: 1px solid var(--line); border-radius: 5px; }
.player-ident { display: flex; min-width: 0; align-items: center; gap: 10px; }
.player-head { display: flex; width: 32px; height: 32px; align-items: center; justify-content: center; color: #fff; background: var(--blue); border-radius: 4px; font-weight: 800; }
.player-ident strong { overflow: hidden; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.player-ident small { display: block; margin-top: 3px; color: var(--muted); font-size: 12px; }
.online-label { color: var(--green); font-size: 11px; font-weight: 700; }
.empty-state { padding: 32px 0; color: var(--muted); text-align: center; font-size: 14px; }
.info-list { display: grid; gap: 0; margin-top: 19px; }
.info-list div { display: flex; justify-content: space-between; gap: 18px; padding: 12px 0; border-bottom: 1px solid #e7ecf0; }
.info-list div:last-child { border-bottom: 0; }
.info-list span { color: var(--muted); font-size: 14px; }
.info-list strong { overflow: hidden; color: var(--ink); font-size: 13px; text-align: right; text-overflow: ellipsis; white-space: nowrap; }
.quick-panel { margin-top: 12px; padding: 25px; }
.quick-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 21px; }
.quick-button { display: grid; grid-template-columns: 39px 1fr; grid-template-rows: auto auto; column-gap: 12px; align-items: center; padding: 14px; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 5px; text-align: left; }
.quick-button:hover { background: var(--blue-soft); border-color: #8ab8ea; transform: translateY(-1px); }
.quick-button strong { font-size: 14px; }
.quick-button small { grid-column: 2; margin-top: 4px; color: var(--muted); font-size: 12px; }
.quick-icon { display: flex; width: 39px; height: 39px; grid-row: 1 / span 2; align-items: center; justify-content: center; border-radius: 5px; color: #fff; font-size: 18px; }
.green-bg { background: var(--green); }
.blue-bg { background: var(--blue); }
.red-bg { background: var(--red); }
.danger-action:hover { background: var(--red-soft); border-color: #e5a5a0; }

/* Sub-pages */
.page-section { animation: fade-in .25s ease both; }
.section-intro { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 23px; }
.section-intro h3 { margin: 0; color: var(--ink); font-size: 34px; letter-spacing: -.06em; }
.section-intro p:last-child { margin: 10px 0 0; color: var(--muted); font-size: 15px; }
.security-note { padding: 10px 12px; color: var(--green); background: var(--green-soft); border: 1px solid #c6ddcd; border-radius: 5px; font-size: 13px; }
.world-switcher { display: flex; gap: 4px; padding: 4px; overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 5px; }
.world-tab { padding: 10px 14px; color: var(--muted); background: transparent; border: 0; border-radius: 4px; font-size: 14px; white-space: nowrap; }
.world-tab.active { color: #fff; background: var(--blue); font-weight: 700; }
.rules-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.rule-card { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 19px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.rule-card > div:first-child { min-width: 0; }
.rule-card strong { display: block; color: var(--ink); font-size: 15px; }
.rule-card small { display: block; margin-top: 6px; color: var(--muted); font-size: 12px; }
.rule-control { flex: 0 0 auto; }
.toggle { position: relative; width: 46px; height: 25px; background: #c2ccd6; border: 0; border-radius: 20px; }
.toggle::after { position: absolute; top: 4px; left: 4px; width: 17px; height: 17px; background: #fff; border-radius: 50%; box-shadow: 0 1px 3px rgb(23 43 77 / 25%); content: ""; transition: transform .2s, background .2s; }
.toggle.on { background: var(--green); }
.toggle.on::after { background: #fff; transform: translateX(21px); }
.number-control { display: flex; align-items: center; gap: 6px; }
.number-control input { width: 82px; min-height: 35px; padding: 6px 8px; text-align: center; }
.number-control button { min-width: 48px; height: 35px; color: var(--blue); background: var(--blue-soft); border: 1px solid #acd0f6; border-radius: 4px; font-size: 13px; font-weight: 700; }
.number-control button:hover { background: #d9eaff; }
.loading-state { grid-column: 1 / -1; padding: 80px 20px; color: var(--muted); background: var(--surface); border: 1px dashed var(--line-strong); border-radius: var(--radius); text-align: center; }
.operator-panel { padding: 25px; }
.operator-add { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.operator-add h3 { margin: 0; color: var(--ink); font-size: 22px; }
.operator-add form { display: flex; align-items: center; gap: 8px; }
.operator-add input { width: 190px; }
.operator-add select { width: 180px; }
.operator-warning { margin-top: 23px; padding: 11px 13px; color: #75571a; background: var(--gold-soft); border: 1px solid #ebd89f; border-radius: 5px; font-size: 13px; }
.operator-table-head, .operator-row { display: grid; grid-template-columns: 1.4fr 1fr .6fr; align-items: center; gap: 15px; }
.operator-table-head { margin-top: 28px; padding: 0 13px 10px; color: var(--muted); border-bottom: 1px solid var(--line); font-size: 12px; font-weight: 700; }
.operator-row { padding: 14px 13px; border-bottom: 1px solid var(--line); font-size: 14px; }
.operator-player { display: flex; align-items: center; gap: 9px; }
.operator-avatar { display: inline-flex; width: 30px; height: 30px; align-items: center; justify-content: center; color: #fff; background: var(--gold); border-radius: 4px; font-weight: 800; }
.operator-level { color: var(--gold); font-size: 13px; font-weight: 700; }
.remove-op { justify-self: end; padding: 8px 11px; color: var(--red); background: var(--red-soft); border: 1px solid #edc0bc; border-radius: 4px; font-size: 12px; }
.remove-op:hover { background: #ffe4e2; }
.terminal-panel { overflow: hidden; background: #172b4d; border: 1px solid #244566; border-radius: var(--radius); box-shadow: var(--shadow); }
.terminal-head { display: flex; align-items: center; gap: 10px; padding: 14px 17px; color: #bcd0e3; border-bottom: 1px solid rgb(255 255 255 / 13%); font-size: 13px; }
.terminal-head strong { flex: 1; color: #fff; font-weight: 600; }
.terminal-head > span:last-child { color: #8ed6b2; font-size: 12px; font-weight: 700; }
.terminal-lights { display: flex; gap: 5px; }
.terminal-lights i { display: block; width: 9px; height: 9px; background: #df736c; border-radius: 50%; }
.terminal-lights i:nth-child(2) { background: #dbbd5e; }
.terminal-lights i:nth-child(3) { background: #6bc681; }
.terminal-panel pre { min-height: 530px; max-height: 65vh; margin: 0; padding: 20px; overflow: auto; color: #d8e7f4; font: 13px/1.72 "Cascadia Code", Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.toast { position: fixed; z-index: 50; right: 24px; bottom: 24px; max-width: 380px; padding: 13px 16px; color: #fff; background: var(--green); border: 1px solid #0d6844; border-radius: 5px; box-shadow: 0 10px 24px rgb(23 43 77 / 20%); font-size: 14px; opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .2s, transform .2s; }
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: var(--red); border-color: #a93832; }
@keyframes fade-in { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }

@media (max-width: 1000px) {
  .sidebar { flex-basis: 225px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .content-grid { grid-template-columns: 1fr; }
  .main-content { padding-inline: 28px; }
}
@media (max-width: 720px) {
  .login-shell { display: block; }
  .login-art { display: none; }
  .login-card { width: min(100% - 44px, 450px); padding: 70px 0 45px; }
  .app-shell { display: block; }
  .sidebar { position: static; min-height: 0; padding: 16px; border-right: 0; border-bottom: 1px solid #0d203b; }
  .brand-block { padding: 0 5px 16px; }
  .server-mini-card { display: none; }
  .nav-list { grid-template-columns: repeat(4, 1fr); gap: 4px; margin-top: 16px; }
  .nav-item { justify-content: center; gap: 4px; padding: 10px 4px; font-size: 13px; }
  .nav-icon { display: none; }
  .sidebar-bottom { display: none; }
  .main-content { padding: 24px 14px 48px; }
  .topbar { padding-bottom: 25px; }
  .topbar h2 { font-size: 29px; }
  .top-actions { gap: 8px; }
  .last-updated { display: none; }
  .hero-row, .section-intro, .operator-add { display: block; }
  .hero-actions { margin-top: 22px; }
  .hero-actions > * { flex: 1; }
  .stats-grid, .rules-grid { grid-template-columns: 1fr; }
  .quick-actions { grid-template-columns: 1fr; }
  .world-switcher { margin-top: 18px; }
  .world-tab { white-space: nowrap; }
  .operator-add form { display: grid; grid-template-columns: 1fr 1fr; margin-top: 18px; }
  .operator-add form input { grid-column: 1 / -1; width: 100%; }
  .operator-add form select, .operator-add form button { width: 100%; }
  .operator-table-head, .operator-row { grid-template-columns: 1.2fr .9fr .7fr; }
  .section-intro h3 { font-size: 29px; }
  .security-note { display: inline-block; margin-top: 18px; }
}