:root {
    --gold: #c9a040;
    --gold-hover: #e8b84b;
    --bg: #0a0a0a;
    --bg-card: #141414;
    --bg-input: #1a1a1a;
    --border: #2a2a2a;
    --text: #f0e6d0;
    --text-muted: #a09070;
    --user-bg: #1a2a1a;
    --user-border: rgba(201,160,64,0.25);
    --sidebar-w: 280px;
    --header-h: 56px;
    --input-h: 70px;
    --radius: 12px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

/* ── LOGIN ─────────────────────────────────────── */

.view { display: none; width: 100%; height: 100%; }
.view.active { display: flex; }

#login-view {
    align-items: center;
    justify-content: center;
    background: var(--bg);
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 380px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
}

.login-logo {
    text-align: center;
    margin-bottom: 8px;
}

.login-logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
}

.login-logo .logo-icon { color: var(--gold); margin-right: 6px; }
.login-logo .logo-dot  { color: var(--gold); }

.login-subtitle {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.login-form { display: flex; flex-direction: column; gap: 12px; }

.login-form input[type="email"] {
    width: 100%;
    padding: 13px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 16px;
    outline: none;
    transition: border-color .2s;
}

.login-form input[type="email"]:focus { border-color: var(--gold); }

.btn-primary {
    width: 100%;
    padding: 13px;
    background: var(--gold);
    color: #111;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s;
}

.btn-primary:hover { background: var(--gold-hover); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.btn-spinner { display: none; }
.btn-spinner.hidden { display: none; }

.login-message {
    margin-top: 12px;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    text-align: center;
}

.login-message.hidden { display: none; }
.login-message.success { background: rgba(100,200,100,.1); color: #6dcc6d; border: 1px solid rgba(100,200,100,.2); }
.login-message.error   { background: rgba(200,80,80,.1);  color: #e06060; border: 1px solid rgba(200,80,80,.2); }
.login-message.loading { background: rgba(201,160,64,.1); color: var(--gold); border: 1px solid rgba(201,160,64,.2); }

.login-hint {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 20px;
    line-height: 1.5;
}

/* ── APP LAYOUT ────────────────────────────────── */

.app-layout {
    display: flex;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* ── SIDEBAR ───────────────────────────────────── */

.sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: var(--sidebar-w);
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform .25s ease;
}

.sidebar.open { transform: translateX(0); }

/* Overlay when sidebar open on mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.6);
    z-index: 199;
}

.sidebar-overlay.visible { display: block; }

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    min-height: var(--header-h);
}

.sidebar-header .logo-icon { color: var(--gold); font-size: 18px; }
.sidebar-header .logo-text { font-size: 15px; font-weight: 600; flex: 1; }

.sidebar-toggle-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    line-height: 1;
}

.sidebar-toggle-btn:hover { color: var(--text); background: var(--border); }

.btn-new-chat {
    margin: 12px;
    padding: 11px 14px;
    background: rgba(201,160,64,.12);
    border: 1px solid rgba(201,160,64,.3);
    border-radius: 8px;
    color: var(--gold);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: background .2s;
}

.btn-new-chat:hover { background: rgba(201,160,64,.2); }

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.conv-item {
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all .15s;
}

.conv-item:hover { background: var(--bg-input); color: var(--text); }
.conv-item.active { background: rgba(201,160,64,.15); color: var(--gold); }

.conv-loading {
    padding: 16px 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border);
}

.user-info { margin-bottom: 8px; }

.user-email {
    font-size: 12px;
    color: var(--text-muted);
    word-break: break-all;
}

.btn-logout {
    width: 100%;
    padding: 9px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: all .2s;
}

.btn-logout:hover { border-color: #e06060; color: #e06060; }

/* ── CHAT AREA ─────────────────────────────────── */

.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    margin-left: 0;
    transition: margin-left .25s ease;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    height: var(--header-h);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    z-index: 10;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 6px;
    line-height: 1;
    flex-shrink: 0;
}

.btn-icon:hover { color: var(--text); background: var(--border); }

.chat-title-wrap { flex: 1; min-width: 0; }

.chat-title {
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text);
}

.model-selector {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 12px;
    padding: 5px 8px;
    outline: none;
    cursor: pointer;
    max-width: 130px;
}

.model-selector:focus { border-color: var(--gold); }

/* ── MESSAGES ──────────────────────────────────── */

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    text-align: center;
    padding: 40px 20px;
    gap: 10px;
}

.welcome-icon { font-size: 36px; color: var(--gold); margin-bottom: 4px; }

.welcome-screen h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
}

.welcome-screen p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 320px;
}

.welcome-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 12px;
}

.suggestion-btn {
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: all .2s;
}

.suggestion-btn:hover { border-color: var(--gold); color: var(--gold); }

.msg {
    display: flex;
    max-width: 85%;
}

.msg-user    { align-self: flex-end;   justify-content: flex-end; }
.msg-assistant { align-self: flex-start; }

.msg-bubble {
    padding: 11px 14px;
    border-radius: 14px;
    font-size: 14px;
    line-height: 1.6;
    word-break: break-word;
}

.msg-user .msg-bubble {
    background: var(--user-bg);
    border: 1px solid var(--user-border);
    border-bottom-right-radius: 4px;
}

.msg-assistant .msg-bubble {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
}

.msg-assistant .msg-bubble pre {
    background: #0d0d0d;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 12px;
    overflow-x: auto;
    font-size: 13px;
    margin: 8px 0;
}

.msg-assistant .msg-bubble code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    background: #0d0d0d;
    padding: 1px 5px;
    border-radius: 4px;
}

.msg-assistant .msg-bubble pre code { padding: 0; background: none; }

.msg-bubble.streaming::after {
    content: '▋';
    color: var(--gold);
    animation: blink .8s step-end infinite;
}

@keyframes blink { 50% { opacity: 0; } }

/* ── TOOL LOG ──────────────────────────────────────── */

.tool-log {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}

.tool-entry {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-family: 'JetBrains Mono', monospace;
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.tool-running {
    color: var(--gold);
    border-color: rgba(201,160,64,.3);
    animation: pulse-tool 1s ease infinite;
}

.tool-ok {
    color: #6dcc6d;
    border-color: rgba(109,204,109,.3);
}

.tool-error {
    color: #e06060;
    border-color: rgba(224,96,96,.3);
}

@keyframes pulse-tool { 0%,100% { opacity: 1; } 50% { opacity: .5; } }

/* ── INPUT AREA ────────────────────────────────── */

.chat-input-area {
    padding: 10px 14px 14px;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.input-wrapper {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.message-input {
    flex: 1;
    padding: 11px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-family: var(--font);
    font-size: 15px;
    resize: none;
    outline: none;
    line-height: 1.5;
    max-height: 120px;
    transition: border-color .2s;
}

.message-input:focus { border-color: var(--gold); }
.message-input::placeholder { color: var(--text-muted); }

.btn-mic {
    width: 40px;
    height: 40px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all .2s;
    align-self: flex-end;
}

.btn-mic:hover { border-color: var(--gold); }
.btn-mic.recording { border-color: #e06060; background: rgba(224,96,96,.1); animation: pulse-mic .8s ease infinite; }

@keyframes pulse-mic { 0%,100% { opacity: 1; } 50% { opacity: .5; } }

.btn-send {
    width: 44px;
    height: 44px;
    background: var(--gold);
    border: none;
    border-radius: 10px;
    color: #111;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background .2s;
}

.btn-send svg { width: 18px; height: 18px; }
.btn-send:hover:not(:disabled) { background: var(--gold-hover); }
.btn-send:disabled { opacity: .4; cursor: not-allowed; }

.input-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 6px;
    padding: 0 2px;
}

.memory-indicator {
    font-size: 11px;
    color: var(--gold);
    opacity: .7;
}

.input-hint {
    font-size: 11px;
    color: var(--text-muted);
}

/* ── DESKTOP ───────────────────────────────────── */

@media (min-width: 768px) {
    .sidebar {
        position: relative;
        transform: translateX(0);
        flex-shrink: 0;
    }

    .chat-area { margin-left: 0; }

    .sidebar-overlay { display: none !important; }

    #sidebar-open { display: none; }

    .model-selector { max-width: 180px; }

    .message { max-width: 72%; }
}

/* ── SCROLLBAR ─────────────────────────────────── */

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }