:root {
    --bg: #0b0c10;
    --panel: #1f2833;
    --accent: #66fcf1;
    --accent-dark: #45a29e;
    --text: #c5c6c8;
    --white: #ffffff;
    --font-main: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --agent-commander: #00f2ff;
    --agent-researcher: #ff6b6b;
    --agent-analyst: #ffd93d;
    --agent-editor: #c084fc;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-main);
    height: 100vh;
    display: flex;
    justify-content: center;
}

/* ── Auth Gate ── */
.auth-gate {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--bg);
    justify-content: center;
    align-items: center;
    background-image: radial-gradient(circle at 50% 30%, rgba(102, 252, 241, 0.06) 0%, transparent 60%);
}

.auth-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 50px 60px;
    border: 1px solid rgba(102, 252, 241, 0.15);
    border-radius: 16px;
    background: rgba(31, 40, 51, 0.6);
    backdrop-filter: blur(20px);
    animation: authFadeIn 0.6s ease;
}

@keyframes authFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.auth-brand {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 3px;
}

.auth-subtitle {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 3px;
    color: var(--text);
    opacity: 0.4;
    text-transform: uppercase;
}

.auth-gate input {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(102, 252, 241, 0.2);
    border-radius: 8px;
    padding: 14px 20px;
    color: var(--white);
    font-family: var(--font-mono);
    font-size: 1rem;
    width: 300px;
    text-align: center;
    letter-spacing: 4px;
    outline: none;
    transition: all 0.3s;
}

.auth-gate input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(102, 252, 241, 0.15);
}

.auth-gate input::placeholder {
    letter-spacing: 1px;
    color: var(--text);
    opacity: 0.3;
}

.auth-btn {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 12px 40px;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 3px;
    cursor: pointer;
    transition: all 0.3s;
}

.auth-btn:hover {
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 0 25px rgba(102, 252, 241, 0.3);
}

.auth-error {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #ff6b6b;
    height: 20px;
    text-shadow: 0 0 10px rgba(255, 107, 107, 0.3);
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ── Main Container ── */
.app-layout {
    width: 100%;
    max-width: 1400px;
    height: 100vh;
    display: flex;
    flex-direction: row;
    overflow: hidden;
    border-left: 1px solid rgba(102, 252, 241, 0.1);
    border-right: 1px solid rgba(102, 252, 241, 0.1);
}

.hud-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: radial-gradient(circle at 50% 0%, rgba(102, 252, 241, 0.05) 0%, transparent 70%);
}

/* ── Header ── */
.hud-header {
    height: 60px;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(102, 252, 241, 0.1);
    background: rgba(0, 0, 0, 0.3);
    flex-shrink: 0;
}

.brand { font-weight: 700; letter-spacing: 2px; color: var(--accent); }
.brand .logo { margin-right: 10px; font-size: 1.2rem; }
.brand .ver { font-size: 0.7rem; opacity: 0.5; font-weight: 400; }

.status-center { display: flex; gap: 20px; font-size: 0.75rem; font-family: var(--font-mono); letter-spacing: 1px; }
.dot { width: 6px; height: 6px; border-radius: 50%; display: inline-block; margin-right: 5px; }
.dot.green { background: var(--accent); box-shadow: 0 0 8px var(--accent); }

.header-controls { display: flex; align-items: center; gap: 15px; }
.time-id { font-family: var(--font-mono); font-size: 0.8rem; opacity: 0.7; }

.header-btn {
    background: transparent;
    border: 1px solid rgba(102, 252, 241, 0.2);
    color: var(--text);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s;
}
.header-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 15px rgba(102, 252, 241, 0.15);
}

/* ── Settings Panel (Dropdown) ── */
.settings-panel {
    position: absolute;
    top: 65px;
    right: 20px;
    width: 380px;
    background: rgba(15, 17, 21, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(102, 252, 241, 0.15);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    max-height: 0;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.settings-panel.open {
    max-height: 500px;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.settings-inner {
    padding: 20px;
}
.settings-inner h3 {
    color: var(--accent);
    font-size: 0.85rem;
    font-family: var(--font-mono);
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.setting-group {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 16px 20px;
    margin-bottom: 12px;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.setting-label { display: flex; flex-direction: column; gap: 3px; }
.setting-title { font-size: 0.95rem; color: var(--white); font-weight: 600; }
.setting-desc { font-size: 0.75rem; color: var(--text); opacity: 0.6; font-family: var(--font-mono); }

/* Toggle Switch */
.toggle-switch {
    position: relative;
    width: 48px;
    height: 26px;
    display: inline-block;
    flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: rgba(255,255,255,0.1);
    border-radius: 26px;
    transition: 0.3s;
}
.toggle-slider::before {
    content: "";
    position: absolute;
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: var(--text);
    border-radius: 50%;
    transition: 0.3s;
}
.toggle-switch input:checked + .toggle-slider {
    background: var(--accent);
    box-shadow: 0 0 15px rgba(102, 252, 241, 0.3);
}
.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
    background: var(--bg);
}

.reset-btn {
    background: transparent;
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: #ff6b6b;
    padding: 6px 16px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    transition: 0.3s;
    flex-shrink: 0;
}
.reset-btn:hover {
    background: rgba(255, 107, 107, 0.1);
    border-color: #ff6b6b;
}

/* ── Agent Cards ── */
.agent-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    margin-bottom: 8px;
    transition: 0.3s;
}
.agent-card:hover {
    border-color: rgba(102, 252, 241, 0.2);
}
.agent-avatar {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.agent-card-info { flex: 1; }
.agent-card-name { font-size: 0.9rem; font-weight: 600; color: var(--white); }
.agent-card-role { font-size: 0.7rem; color: var(--text); opacity: 0.5; font-family: var(--font-mono); }
.agent-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 6px var(--accent);
    animation: pulse 2s infinite;
    flex-shrink: 0;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ── Chat Area ── */
.chat-viewport {
    flex: 1;
    overflow-y: auto;
    padding: 30px 8%;
    display: flex;
    flex-direction: column;
    gap: 25px;
    scroll-behavior: smooth;
}

.msg {
    max-width: 90%;
    animation: slideIn 0.3s ease-out;
}

.msg.user { align-self: flex-end; }
.msg.agent, .msg.assistant { align-self: flex-start; width: 100%; }

.msg-content {
    padding: 15px 20px;
    border-radius: 4px;
    line-height: 1.7;
    font-size: 1.05rem;
}

.msg.user .msg-content {
    background: var(--panel);
    border-right: 3px solid var(--accent);
    color: var(--white);
}

.msg.agent .msg-content,
.msg.assistant .msg-content {
    background: transparent;
    color: var(--text);
    border-left: 1px solid rgba(102, 252, 241, 0.2);
}

.msg.system .msg-content {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    opacity: 0.4;
    text-transform: uppercase;
}

/* ── Typing Indicator ── */
.typing-content {
    padding: 12px 20px !important;
}
.typing-indicator {
    display: flex;
    gap: 6px;
    align-items: center;
}
.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.4;
    animation: typingBounce 1.4s ease-in-out infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-8px); opacity: 1; }
}

/* Agent section headers inside messages */
.msg-content h2 {
    color: var(--accent);
    margin: 20px 0 10px 0;
    font-size: 1.1rem;
    padding-bottom: 5px;
    border-bottom: 1px solid rgba(102, 252, 241, 0.1);
}

/* Markdown 样式增强 */
.msg-content h1, .msg-content h3 { color: var(--accent); margin: 20px 0 10px 0; }
.msg-content code { font-family: var(--font-mono); background: rgba(255,255,255,0.05); padding: 2px 5px; border-radius: 3px; }
.msg-content pre { margin: 15px 0; border: 1px solid rgba(255,255,255,0.05); border-radius: 8px; overflow: hidden; }
.msg-content pre code { display: block; padding: 15px; background: #0f1115; }
.msg-content table { border-collapse: collapse; width: 100%; margin: 15px 0; }
.msg-content th, .msg-content td { border: 1px solid rgba(255,255,255,0.1); padding: 10px; text-align: left; }
.msg-content th { background: rgba(102, 252, 241, 0.05); color: var(--accent); }
.msg-content blockquote {
    border-left: 3px solid var(--accent-dark);
    padding: 8px 15px;
    margin: 10px 0;
    background: rgba(102, 252, 241, 0.03);
    color: var(--text);
    font-style: italic;
}
.msg-content hr {
    border: none;
    border-top: 1px solid rgba(102, 252, 241, 0.1);
    margin: 15px 0;
}

/* ── Mode Indicator ── */
.mode-indicator {
    padding: 0 0 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}
.mode-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 2px;
    padding: 4px 12px;
    border-radius: 4px;
    text-transform: uppercase;
}
.mode-tag.solo {
    color: var(--accent);
    border: 1px solid rgba(102, 252, 241, 0.2);
    background: rgba(102, 252, 241, 0.05);
}
.mode-tag.team {
    color: #ffd93d;
    border: 1px solid rgba(255, 217, 61, 0.3);
    background: rgba(255, 217, 61, 0.05);
    animation: teamGlow 2s ease-in-out infinite;
}
@keyframes teamGlow {
    0%, 100% { box-shadow: 0 0 5px rgba(255, 217, 61, 0.1); }
    50% { box-shadow: 0 0 15px rgba(255, 217, 61, 0.2); }
}

/* ── Input Area ── */
.interaction-area {
    padding: 15px 30px 35px 30px;
    background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
    flex-shrink: 0;
}

.input-wrapper {
    background: var(--panel);
    border: 1px solid rgba(102, 252, 241, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: flex-end;
    padding: 10px 15px;
    gap: 15px;
    transition: all 0.3s;
}
.input-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(102, 252, 241, 0.1);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--white);
    font-family: var(--font-main);
    font-size: 1.1rem;
    resize: none;
    outline: none;
    padding: 10px 0;
    max-height: 200px;
}

.icon-btn {
    cursor: pointer;
    color: var(--text);
    opacity: 0.6;
    padding-bottom: 8px;
    transition: 0.2s;
}
.icon-btn:hover { color: var(--accent); opacity: 1; }

.send-btn {
    background: var(--accent);
    color: #000;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: 0.2s;
    flex-shrink: 0;
}
.send-btn:hover { transform: scale(1.05); background: var(--white); }

.upload-bar {
    padding: 8px 15px;
    font-size: 0.8rem;
    color: var(--accent);
    font-family: var(--font-mono);
    border-bottom: none;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 滚动条 */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(102, 252, 241, 0.1); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── Drag & Drop Overlay ── */
.drop-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(11, 12, 16, 0.92);
    backdrop-filter: blur(8px);
    justify-content: center;
    align-items: center;
}
.drop-overlay.active {
    display: flex;
}
.drop-overlay-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    letter-spacing: 2px;
    border: 2px dashed var(--accent);
    padding: 60px 80px;
    border-radius: 16px;
    animation: dropPulse 1.5s ease-in-out infinite;
}
@keyframes dropPulse {
    0%, 100% { border-color: var(--accent); box-shadow: 0 0 20px rgba(102, 252, 241, 0.1); }
    50% { border-color: var(--accent-dark); box-shadow: 0 0 40px rgba(102, 252, 241, 0.2); }
}

/* ── File Preview Bar ── */
.file-preview-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: rgba(102, 252, 241, 0.05);
    border: 1px solid rgba(102, 252, 241, 0.15);
    border-radius: 8px;
    margin-bottom: 10px;
    animation: slideIn 0.2s ease-out;
}
.file-preview-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    min-width: 0;
}
.file-preview-icon { font-size: 1.1rem; flex-shrink: 0; }
.file-preview-name { color: var(--accent); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-preview-size { color: var(--text); opacity: 0.5; font-size: 0.75rem; flex-shrink: 0; }

.file-remove-btn {
    background: transparent;
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: #ff6b6b;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}
.file-remove-btn:hover {
    background: rgba(255, 107, 107, 0.15);
    border-color: #ff6b6b;
    transform: scale(1.1);
}

/* ── Input wrapper drag-over state ── */
.input-wrapper.drag-over {
    border-color: var(--accent) !important;
    box-shadow: 0 0 25px rgba(102, 252, 241, 0.2) !important;
}

/* ── Sidebar Layout ── */
.sidebar {
    width: 260px;
    background: var(--panel);
    border-right: 1px solid rgba(102, 252, 241, 0.1);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    flex-shrink: 0;
    z-index: 100;
}

.sidebar.closed {
    margin-left: -260px;
}

.sidebar-header {
    height: 60px;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(102, 252, 241, 0.1);
}

.sidebar-title {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 0.8rem;
    letter-spacing: 2px;
}

.new-chat-btn {
    margin: 15px;
    padding: 10px;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    cursor: pointer;
    transition: 0.2s;
}
.new-chat-btn:hover {
    background: rgba(102, 252, 241, 0.1);
}

.session-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.session-item {
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: 0.2s;
    background: rgba(255, 255, 255, 0.02);
}

.session-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(102, 252, 241, 0.1);
}

.session-item.active {
    background: rgba(102, 252, 241, 0.08);
    border-color: var(--accent);
}

.session-title {
    font-size: 0.9rem;
    color: var(--white);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.session-date {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text);
    opacity: 0.5;
}

/* ══════════════════════════════════════════
   Mobile Responsive
   ══════════════════════════════════════════ */
@media (max-width: 768px) {
    .hud-header {
        padding: 0 15px;
        height: auto;
        min-height: 50px;
        flex-wrap: wrap;
        gap: 8px;
        padding-top: 10px;
        padding-bottom: 10px;
    }

    .brand { font-size: 0.9rem; }
    .status-center { display: none; }
    .time-id { font-size: 0.65rem; }

    .chat-viewport {
        padding: 15px 4%;
        gap: 15px;
    }

    .msg { max-width: 95%; }
    .msg-content { padding: 12px 15px; font-size: 0.95rem; }

    .interaction-area {
        padding: 10px 15px 25px 15px;
    }

    .input-wrapper {
        padding: 8px 10px;
        gap: 10px;
    }

    textarea { font-size: 1rem; }

    .settings-inner { padding: 15px; }

    .drop-overlay-inner { padding: 40px; font-size: 0.9rem; }

    .auth-box { padding: 40px 30px; }
    .auth-gate input { width: 250px; font-size: 0.9rem; }
}

@media (max-width: 480px) {
    .header-controls { gap: 8px; }
    .brand .ver { display: none; }
    .msg-content { padding: 10px 12px; font-size: 0.9rem; }
    .msg-content pre code { font-size: 0.8rem; padding: 10px; }
}