:root {
    color-scheme: light;
    --bg-base: #F6F8FB;
    --panel-bg: #FFFFFF;
    --panel-soft: #F1F5F9;
    --border-color: #DDE5EF;
    --text-main: #0F172A;
    --text-muted: #64748B;
    --status-ok: #10B981;
    --status-warn: #F59E0B;
    --shadow: 0 10px 32px rgba(15, 23, 42, 0.07);
    --dropdown-shadow: 0 18px 44px rgba(15, 23, 42, 0.14);
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg-base: #0B0F16;
    --panel-bg: #151B25;
    --panel-soft: #101620;
    --border-color: #273244;
    --text-main: #F1F5F9;
    --text-muted: #94A3B8;
    --shadow: 0 18px 42px rgba(0, 0, 0, 0.34);
    --dropdown-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
}

[data-color="red"] { --accent-color: #E60012; --accent-bg: rgba(230, 0, 18, 0.08); }
[data-theme="dark"][data-color="red"] { --accent-color: #FF3344; --accent-bg: rgba(230, 0, 18, 0.14); }
[data-color="blue"] { --accent-color: #007AFF; --accent-bg: rgba(0, 122, 255, 0.08); }
[data-theme="dark"][data-color="blue"] { --accent-color: #33B8FF; --accent-bg: rgba(0, 168, 255, 0.14); }
[data-color="purple"] { --accent-color: #8A2BE2; --accent-bg: rgba(138, 43, 226, 0.08); }
[data-theme="dark"][data-color="purple"] { --accent-color: #B23AEE; --accent-bg: rgba(160, 32, 240, 0.14); }
[data-color="green"] { --accent-color: #00A86B; --accent-bg: rgba(0, 168, 107, 0.08); }
[data-theme="dark"][data-color="green"] { --accent-color: #00E676; --accent-bg: rgba(0, 230, 118, 0.14); }

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease, color 0.24s ease;
}

body {
    width: 100vw;
    height: 100svh;
    overflow: hidden;
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--panel-bg) 42%, transparent), transparent 34%),
        radial-gradient(circle, color-mix(in srgb, var(--border-color) 54%, transparent) 1px, transparent 1px),
        var(--bg-base);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column;
    background-size: auto, 32px 32px, auto;
}

button, input { font: inherit; }
button { color: inherit; }

header {
    height: 70px;
    padding: 0 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background: color-mix(in srgb, var(--bg-base) 86%, transparent);
    backdrop-filter: blur(16px);
    position: sticky;
    top: 0;
    z-index: 100;
    overflow: visible;
    flex-shrink: 0;
}

main { width: 100%; flex: 1; min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.header-left { display: flex; align-items: center; gap: 20px; min-width: 0; }
.logo { font-weight: 800; font-size: 1.2rem; letter-spacing: 1.5px; white-space: nowrap; }
.logo span { color: var(--accent-color); }
.sync-status { font-family: Consolas, monospace; font-size: 0.7rem; color: var(--text-muted); letter-spacing: 1px; white-space: nowrap; }
.header-right { display: flex; align-items: center; gap: 12px; }

.top-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 0;
    overflow: visible;
}

.top-nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 38px;
    min-width: 70px;
    padding: 0 14px;
    border-radius: 8px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 720;
    overflow: visible;
}

.top-nav-link::before {
    content: "";
    position: absolute;
    top: -17px;
    left: 14px;
    right: 14px;
    height: 3px;
    border-radius: 999px;
    background: var(--accent-color);
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.top-nav-link:hover {
    color: var(--accent-color);
    background: var(--accent-bg);
}

.top-nav-link:hover::before {
    opacity: 1;
    transform: translateY(0);
}

.lang-toggle {
    height: 38px;
    min-width: 54px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--panel-bg);
    color: var(--text-main);
    cursor: pointer;
    box-shadow: none;
    font-size: 0.85rem;
    font-weight: 760;
}

.lang-toggle:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.icon-btn {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    height: 40px;
    width: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: none;
}
.icon-btn:hover { border-color: var(--accent-color); color: var(--accent-color); transform: translateY(-1px); }
.icon-btn svg { width: 18px; height: 18px; }

.color-dropdown-wrap, .engine-dropdown-wrap, .custom-dropdown-wrap { position: relative; }
.color-dropdown-menu, .engine-options-menu, .ai-options-menu {
    position: absolute;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    box-shadow: var(--dropdown-shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px) scale(0.98);
    transition: all 0.18s;
    z-index: 200;
}
.color-dropdown-menu { top: calc(100% + 10px); right: 0; padding: 16px; }
.engine-options-menu { top: calc(100% + 8px); left: 0; min-width: 140px; }
.ai-options-menu { top: calc(100% + 8px); right: 0; min-width: 130px; }
.show { opacity: 1; pointer-events: auto; transform: translateY(0) scale(1); }
.menu-title { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 1px; }
.color-options { display: flex; gap: 12px; }
.color-dot { width: 22px; height: 22px; border-radius: 50%; cursor: pointer; border: 2px solid transparent; flex-shrink: 0; }
.color-dot.active { border-color: var(--text-main); box-shadow: 0 0 0 2px var(--panel-bg), 0 0 0 4px var(--accent-color); }
.dot-red { background: #E60012; } .dot-blue { background: #007AFF; } .dot-purple { background: #8A2BE2; } .dot-green { background: #00A86B; }

.search-section { max-width: 840px; margin: 1.25rem auto 1rem; width: 90%; flex-shrink: 0; }
.search-box { display: flex; background: var(--panel-bg); border: 1px solid var(--border-color); border-radius: 50px; box-shadow: var(--shadow); height: 56px; position: relative; }
.search-box.focused { border-color: var(--accent-color); box-shadow: 0 0 0 4px var(--accent-bg); }
.engine-selected { padding: 0 16px 0 24px; color: var(--text-muted); font-weight: 650; font-size: 0.95rem; display: flex; align-items: center; gap: 8px; cursor: pointer; border: none; background: transparent; border-radius: 50px 0 0 50px; height: 100%; }
.engine-selected:hover { color: var(--accent-color); background: var(--accent-bg); }
.engine-opt, .ai-opt { width: 100%; padding: 10px 14px; border-radius: 8px; cursor: pointer; color: var(--text-main); font-weight: 600; font-size: 0.9rem; border: none; background: transparent; text-align: left; }
.engine-opt:hover, .ai-opt:hover { background: var(--accent-bg); color: var(--accent-color); }
.search-divider { width: 1px; height: 28px; background: var(--border-color); align-self: center; }
#search-input { flex: 1; min-width: 0; background: transparent; border: none; padding: 0 18px; color: var(--text-main); font-size: 1.02rem; outline: none; }
#search-input::placeholder, #ai-input::placeholder { color: var(--text-muted); }
.search-btn { background: transparent; border: none; width: 50px; display: flex; justify-content: center; align-items: center; cursor: pointer; color: var(--text-muted); }
.search-btn:hover { color: var(--accent-color); }
.search-btn svg { width: 20px; height: 20px; }
.ai-trigger-btn { border-radius: 0 50px 50px 0; width: 60px; }
.ai-trigger-btn:hover { background: var(--accent-bg); }
.ai-trigger-btn svg { color: var(--accent-color); }

.bento-grid { flex: 1; min-height: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); grid-template-rows: minmax(0, 1.28fr) minmax(0, 0.88fr); gap: 16px; max-width: 1120px; margin: 0 auto 1rem; width: 95%; align-items: stretch; overflow: hidden; }
.card { background: color-mix(in srgb, var(--panel-bg) 96%, transparent); border: 1px solid var(--border-color); border-radius: 8px; padding: 18px; box-shadow: var(--shadow); display: flex; flex-direction: column; min-height: 0; min-width: 0; overflow: hidden; }
.card:hover { box-shadow: 0 16px 42px rgba(15, 23, 42, 0.1); }
[data-theme="dark"] .card:hover { box-shadow: 0 20px 50px rgba(0, 0, 0, 0.42); }
.col-span-2 { grid-column: span 2; }
.card-header { font-size: 0.84rem; font-weight: 760; color: var(--text-muted); letter-spacing: 1px; margin-bottom: 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-shrink: 0; text-transform: uppercase; }
.header-title { display: flex; align-items: center; gap: 8px; }
.indicator { display: block; width: 4px; height: 20px; background: var(--accent-color); border-radius: 2px; flex-shrink: 0; }
.scroll-area { flex: 1; overflow-y: auto; padding-right: 4px; }
.scroll-area::-webkit-scrollbar, .chat-window::-webkit-scrollbar { width: 4px; }
.scroll-area::-webkit-scrollbar-thumb, .chat-window::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.ai-card { min-height: 0; }
.header-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.status-pill { color: var(--text-muted); background: var(--panel-soft); border: 1px solid var(--border-color); border-radius: 999px; padding: 5px 10px; font-size: 0.74rem; font-weight: 700; white-space: nowrap; }
.status-pill.online { color: var(--status-ok); border-color: var(--status-ok); }
.status-pill.offline { color: var(--status-warn); border-color: var(--status-warn); }
.mini-btn {
    border: 1px solid var(--border-color);
    background: var(--panel-soft);
    color: var(--text-muted);
    border-radius: 999px;
    padding: 5px 10px;
    font-size: 0.74rem;
    font-weight: 780;
    cursor: pointer;
}
.mini-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: var(--accent-bg);
}
.expand-btn { background: transparent; border: none; color: var(--text-muted); cursor: pointer; display: flex; align-items: center; padding: 5px; border-radius: 8px; }
.expand-btn:hover { color: var(--accent-color); background: var(--accent-bg); }
.expand-btn svg { width: 18px; height: 18px; }
.ai-selected { background: var(--panel-bg); border: 1px solid var(--border-color); color: var(--text-main); padding: 6px 13px; border-radius: 20px; font-size: 0.8rem; font-weight: 750; display: flex; align-items: center; gap: 6px; cursor: pointer; box-shadow: var(--shadow); }
.ai-selected:hover { border-color: var(--accent-color); color: var(--accent-color); }
.provider-selector {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: var(--panel-soft);
}

.provider-chip {
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: 999px;
    padding: 5px 10px;
    cursor: pointer;
    font-size: 0.76rem;
    font-weight: 780;
}

.provider-chip:hover,
.provider-chip.active {
    color: white;
    background: var(--accent-color);
}
.ai-core-content { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.chat-window { flex: 1; min-height: 0; overflow-y: auto; background: var(--panel-soft); border: 1px solid var(--border-color); border-radius: 8px; padding: 16px; margin-bottom: 14px; display: flex; flex-direction: column; gap: 12px; font-size: 0.95rem; line-height: 1.6; }
.chat-msg { padding: 10px 14px; border-radius: 8px; max-width: min(85%, 680px); overflow-wrap: anywhere; white-space: pre-wrap; }
.system-msg { color: var(--text-muted); font-family: Consolas, monospace; align-self: flex-start; padding: 0; background: transparent; font-size: 0.8rem; }
.user-msg { background: var(--accent-bg); color: var(--text-main); border: 1px solid var(--accent-color); align-self: flex-end; border-bottom-right-radius: 4px; }
.ai-msg { background: var(--panel-bg); color: var(--text-main); border: 1px solid var(--border-color); align-self: flex-start; border-bottom-left-radius: 4px; box-shadow: var(--shadow); }
.error-msg { border-color: var(--status-warn); }
.chat-input-area { display: flex; gap: 10px; height: 48px; flex-shrink: 0; }
#ai-input { flex: 1; min-width: 0; background: var(--panel-soft); border: 1px solid var(--border-color); border-radius: 24px; padding: 0 18px; color: var(--text-main); outline: none; font-size: 1rem; }
#ai-input:focus { border-color: var(--accent-color); background: var(--panel-bg); box-shadow: 0 0 0 3px var(--accent-bg); }
.chat-send-btn { background: var(--accent-color); color: white; border: none; width: 48px; border-radius: 50%; cursor: pointer; display: flex; justify-content: center; align-items: center; box-shadow: 0 4px 12px rgba(0,0,0,0.15); flex-shrink: 0; }
.chat-send-btn:disabled { opacity: 0.55; cursor: progress; }

.item-list { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.server-item { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-size: 0.95rem; }
.server-name { font-weight: 700; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: grid; gap: 4px; }
.server-name small { color: var(--text-muted); font-size: 0.72rem; font-weight: 650; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.server-item.muted { color: var(--text-muted); font-size: 0.9rem; }
.status-badge { display: flex; align-items: center; gap: 6px; font-size: 0.78rem; font-weight: 700; font-family: Consolas, monospace; background: var(--panel-soft); padding: 4px 8px; border-radius: 8px; border: 1px solid var(--border-color); white-space: nowrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.online { background: var(--status-ok); box-shadow: 0 0 8px rgba(16, 185, 129, 0.45); }
.dot.offline { background: var(--text-muted); }

.link-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; overflow: auto; padding-right: 4px; }
.link-card { display: grid; gap: 6px; color: var(--text-main); text-decoration: none; border: 1px solid var(--border-color); background: var(--panel-soft); border-radius: 8px; padding: 12px 13px; min-width: 0; }
.link-card:hover { border-color: color-mix(in srgb, var(--accent-color) 58%, var(--border-color)); color: var(--accent-color); transform: translateY(-1px); }
.link-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.link-title { font-weight: 730; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.link-tag { color: var(--accent-color); font-size: 0.72rem; font-family: Consolas, monospace; font-weight: 800; background: var(--accent-bg); padding: 3px 6px; border-radius: 6px; flex-shrink: 0; }
.link-desc { color: var(--text-muted); font-size: 0.82rem; line-height: 1.4; }
.log-box { flex: 1; min-height: 0; overflow: auto; background: var(--panel-soft); border-radius: 8px; padding: 14px; font-family: Consolas, monospace; font-size: 0.8rem; color: var(--text-muted); line-height: 1.8; border: 1px solid var(--border-color); white-space: pre-wrap; }
.probe-list { overflow: auto; padding-right: 4px; }

.pip-stub { display: none; flex: 1; align-items: center; justify-content: center; flex-direction: column; gap: 10px; color: var(--text-muted); font-size: 0.9rem; text-align: center; }
.pip-stub button { background: var(--accent-bg); color: var(--accent-color); border: 1px solid var(--accent-color); padding: 7px 16px; border-radius: 8px; cursor: pointer; }
.pip-window { position: fixed; top: 120px; right: 50px; width: min(380px, 92vw); height: min(500px, 78vh); background: var(--panel-bg); border: 1px solid color-mix(in srgb, var(--accent-color) 60%, var(--border-color)); border-radius: 8px; box-shadow: 0 20px 50px rgba(0,0,0,0.3); display: none; flex-direction: column; z-index: 2000; }
.pip-header { background: var(--accent-bg); padding: 13px 18px; border-bottom: 1px solid var(--border-color); border-radius: 8px 8px 0 0; display: flex; justify-content: space-between; align-items: center; cursor: grab; font-weight: 750; color: var(--accent-color); font-size: 0.9rem; user-select: none; touch-action: none; }
.pip-title { display: flex; align-items: center; gap: 8px; pointer-events: none; }
.close-pip { background: transparent; border: none; color: var(--accent-color); cursor: pointer; display: flex; }
.pip-content-area { flex: 1; display: flex; flex-direction: column; padding: 16px; min-height: 0; }

@media (max-width: 900px) {
    header { height: 70px; padding: 0 4%; gap: 10px; }
    .sync-status { display: none; }
    .top-nav { flex: 1; justify-content: flex-start; overflow-x: auto; overflow-y: visible; padding-top: 16px; margin-top: -16px; }
    .top-nav::-webkit-scrollbar { display: none; }
    .top-nav-link { min-width: 62px; padding: 0 10px; font-size: 0.82rem; }
    .search-section { margin: 0.9rem auto 0.75rem; width: 94%; }
    .bento-grid { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: minmax(0, 1.3fr) minmax(0, 0.72fr) minmax(0, 0.72fr); width: 94%; gap: 14px; }
    .col-span-2 { grid-column: span 2; }
    .card { padding: 16px; }
    .link-grid { grid-template-columns: 1fr; }
    .pip-window { right: 4vw; top: 10vh; height: 72vh; }
}

@media (max-width: 560px) {
    header { height: 66px; }
    .logo { font-size: 1rem; }
    .header-left { gap: 10px; }
    .header-right { gap: 6px; }
    .icon-btn { width: 36px; height: 36px; }
    .lang-toggle { min-width: 46px; height: 36px; padding: 0 8px; }
    .search-box { height: auto; min-height: 54px; border-radius: 22px; }
    .engine-selected { padding-left: 16px; }
    #search-input { padding: 0 10px; font-size: 0.95rem; }
    .search-btn { width: 44px; }
    .ai-trigger-btn { width: 48px; }
    .header-actions { justify-content: flex-start; }
    .card-header { align-items: flex-start; flex-direction: column; margin-bottom: 10px; }
    .bento-grid { grid-template-rows: minmax(0, 1.35fr) minmax(0, 0.68fr) minmax(0, 0.7fr); }
    .chat-window { padding: 12px; font-size: 0.88rem; }
    .chat-input-area { height: 44px; }
}