/* =============================================
   Zalo Inbox — giao diện chung
   Màu chủ đạo: Zalo blue #0068ff
   ============================================= */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #0068ff;
    --primary-dark: #0052cc;
    --bg: #f0f2f5;
    --white: #fff;
    --border: #e4e6eb;
    --text: #050505;
    --text-sub: #65676b;
    --green: #31a24c;
    --red: #e41e3f;
    --bubble-in: #ffffff;
    --bubble-out: #d6e6ff;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: 14px; }

/* ============ Buttons ============ */
.btn {
    border: none; border-radius: 6px; padding: 8px 16px; font-size: 14px; font-weight: 600;
    transition: background .15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { background: #8ab4f8; cursor: not-allowed; }
.btn-light { background: #e4e6eb; color: var(--text); }
.btn-light:hover { background: #d8dadf; }
.btn-danger { background: var(--red); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-block { width: 100%; }

/* ============ Login page ============ */
.login-page {
    display: flex; align-items: center; justify-content: center; min-height: 100vh;
    background: linear-gradient(135deg, #0068ff 0%, #00c6ff 100%);
}
.login-box {
    background: var(--white); border-radius: 12px; padding: 40px; width: 360px;
    box-shadow: 0 8px 32px rgba(0,0,0,.18); text-align: center;
}
.login-logo { font-size: 48px; margin-bottom: 8px; }
.login-box h1 { font-size: 22px; margin-bottom: 4px; }
.login-sub { color: var(--text-sub); margin-bottom: 24px; }
.login-box input {
    width: 100%; padding: 11px 14px; margin-bottom: 12px;
    border: 1px solid var(--border); border-radius: 6px; outline: none;
}
.login-box input:focus { border-color: var(--primary); }
.login-box .btn { padding: 11px; }
.login-error { color: var(--red); margin-top: 12px; min-height: 18px; font-size: 13px; }

/* ============ App layout ============ */
.app {
    display: flex; flex-direction: column; height: 100vh; overflow: hidden;
}
.topbar {
    display: flex; align-items: center; gap: 12px; padding: 8px 16px;
    background: var(--primary); color: #fff; flex-shrink: 0;
}
.topbar .brand { font-weight: 700; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.topbar .spacer { flex: 1; }
.topbar a, .topbar .navlink {
    color: #fff; text-decoration: none; padding: 6px 12px; border-radius: 6px; font-weight: 600;
    background: rgba(255,255,255,.12); border: none; font-size: 13px;
}
.topbar a:hover, .topbar .navlink:hover { background: rgba(255,255,255,.25); }
.status-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; background: var(--red); }
.status-dot.on { background: #7fff9e; }
.channel-chip {
    display: flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12);
    border-radius: 20px; padding: 4px 12px 4px 4px; font-size: 13px;
}
.channel-chip img { width: 26px; height: 26px; border-radius: 50%; }

.main { display: flex; flex: 1; min-height: 0; }

/* ============ Sidebar ============ */
.sidebar {
    width: 340px; flex-shrink: 0; background: var(--white); border-right: 1px solid var(--border);
    display: flex; flex-direction: column; min-height: 0;
}
.sidebar-search { padding: 10px; border-bottom: 1px solid var(--border); }
.sidebar-search input {
    width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 18px;
    background: var(--bg); outline: none;
}
.filter-tabs { display: flex; gap: 6px; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.filter-tabs button {
    flex: 1; padding: 6px; border: none; border-radius: 6px; background: transparent;
    font-weight: 600; color: var(--text-sub);
}
.filter-tabs button.active { background: #e7f0ff; color: var(--primary); }
.thread-list { flex: 1; overflow-y: auto; }
.thread-item {
    display: flex; gap: 10px; padding: 10px 12px; cursor: pointer; align-items: center;
    border-bottom: 1px solid #f5f5f5;
}
.thread-item:hover { background: #f5f7fa; }
.thread-item.active { background: #e7f0ff; }
.avatar {
    width: 44px; height: 44px; border-radius: 50%; flex-shrink: 0; object-fit: cover;
    background: #cfd8e3; display: flex; align-items: center; justify-content: center;
    font-size: 18px; color: #fff; font-weight: 700; overflow: hidden;
}
.thread-info { flex: 1; min-width: 0; }
.thread-name { font-weight: 600; display: flex; align-items: center; gap: 6px; }
.thread-name .name-text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.badge-type {
    font-size: 10px; padding: 1px 6px; border-radius: 8px; font-weight: 700; flex-shrink: 0;
}
.badge-type.user { background: #e7f0ff; color: var(--primary); }
.badge-type.group { background: #fff0e0; color: #e07800; }
.thread-id { font-size: 11px; color: var(--text-sub); font-family: Consolas, monospace; }
.thread-preview {
    font-size: 12px; color: var(--text-sub); white-space: nowrap; overflow: hidden;
    text-overflow: ellipsis; margin-top: 2px;
}
.thread-meta { text-align: right; flex-shrink: 0; }
.thread-time { font-size: 11px; color: var(--text-sub); }
.unread-badge {
    background: var(--red); color: #fff; font-size: 11px; font-weight: 700;
    border-radius: 10px; padding: 1px 7px; display: inline-block; margin-top: 4px;
}
.empty-note { padding: 30px 16px; text-align: center; color: var(--text-sub); }

/* ============ Chat pane ============ */
.chat { flex: 1; display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.chat-header {
    display: flex; align-items: center; gap: 10px; padding: 10px 16px;
    background: var(--white); border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.chat-header .chat-title { font-weight: 700; font-size: 15px; }
.chat-header .chat-sub { font-size: 12px; color: var(--text-sub); font-family: Consolas, monospace; display:flex; align-items:center; gap:6px; }
.copy-btn {
    border: none; background: #eef1f5; border-radius: 4px; font-size: 11px; padding: 2px 6px; color: var(--text-sub);
}
.copy-btn:hover { background: #dde2ea; }
.chat-body { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 4px; }
.load-more { text-align: center; margin-bottom: 8px; }
.msg-row { display: flex; margin-bottom: 2px; }
.msg-row.out { justify-content: flex-end; }
.msg-bubble {
    max-width: 65%; padding: 8px 12px; border-radius: 14px; position: relative;
    box-shadow: 0 1px 1px rgba(0,0,0,.06); word-wrap: break-word; white-space: pre-wrap;
}
.msg-row.in .msg-bubble { background: var(--bubble-in); border-top-left-radius: 4px; }
.msg-row.out .msg-bubble { background: var(--bubble-out); border-top-right-radius: 4px; }
.msg-sender { font-size: 11px; color: var(--primary); font-weight: 700; margin-bottom: 2px; }
.msg-time { font-size: 10px; color: var(--text-sub); margin-top: 4px; text-align: right; }
.msg-img { max-width: 260px; max-height: 260px; border-radius: 8px; display: block; cursor: pointer; }
.msg-special { font-style: italic; color: var(--text-sub); }
.day-divider {
    text-align: center; margin: 12px 0; color: var(--text-sub); font-size: 12px;
}
.day-divider span { background: #dde3ea; border-radius: 10px; padding: 3px 12px; }

/* ============ Composer ============ */
.composer {
    display: flex; gap: 8px; padding: 10px 14px; background: var(--white);
    border-top: 1px solid var(--border); align-items: flex-end; flex-shrink: 0;
}
.composer textarea {
    flex: 1; resize: none; border: 1px solid var(--border); border-radius: 18px;
    padding: 9px 14px; outline: none; max-height: 120px; line-height: 1.4;
}
.composer textarea:focus { border-color: var(--primary); }
.icon-btn {
    border: none; background: transparent; font-size: 20px; padding: 6px; border-radius: 6px;
}
.icon-btn:hover { background: var(--bg); }
.img-preview {
    display: flex; align-items: center; gap: 10px; padding: 8px 14px;
    background: #fffbe8; border-top: 1px solid var(--border);
}
.img-preview img { height: 60px; border-radius: 6px; }
.chat-placeholder {
    flex: 1; display: flex; align-items: center; justify-content: center;
    flex-direction: column; gap: 10px; color: var(--text-sub);
}
.chat-placeholder .big { font-size: 52px; }

/* ============ Banner + modal ============ */
.banner-disconnected {
    background: #fde8e8; color: #b71c1c; padding: 10px 16px; display: flex;
    align-items: center; gap: 12px; flex-shrink: 0;
}
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.55); display: flex;
    align-items: center; justify-content: center; z-index: 100;
}
.modal {
    background: var(--white); border-radius: 12px; padding: 28px; width: 420px;
    max-width: calc(100vw - 32px); max-height: 90vh; overflow-y: auto; text-align: center;
}
.modal h2 { margin-bottom: 8px; font-size: 18px; }
.modal .qr-wrap { margin: 16px auto; width: 240px; height: 240px; background: var(--bg); border-radius: 8px;
    display: flex; align-items: center; justify-content: center; }
.modal .qr-wrap img { width: 240px; height: 240px; border-radius: 8px; }
.modal .qr-status { color: var(--text-sub); margin-bottom: 16px; min-height: 20px; }
.modal .close-row { margin-top: 8px; }

/* ============ Settings page ============ */
.settings-wrap { max-width: 900px; margin: 24px auto; padding: 0 16px 60px; overflow-y: auto; flex: 1; }
.card {
    background: var(--white); border-radius: 10px; padding: 20px 24px; margin-bottom: 20px;
    box-shadow: 0 1px 2px rgba(0,0,0,.06);
}
.card h2 { font-size: 17px; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.card table { width: 100%; border-collapse: collapse; }
.card th, .card td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 13px; }
.card th { color: var(--text-sub); font-weight: 600; }
.mono { font-family: Consolas, monospace; font-size: 12px; }
.form-row { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.form-row input {
    padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; outline: none; flex: 1; min-width: 140px;
}
.tag { font-size: 11px; padding: 2px 8px; border-radius: 8px; font-weight: 700; }
.tag.on { background: #e6f6e9; color: var(--green); }
.tag.off { background: #fde8e8; color: var(--red); }
.api-doc { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 12px; overflow: hidden; }
.api-doc-head {
    display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: #f7f9fc; cursor: pointer;
}
.api-doc-head .method { font-weight: 800; font-size: 12px; padding: 2px 8px; border-radius: 4px; color: #fff; }
.method.get { background: #31a24c; } .method.post { background: var(--primary); }
.api-doc-body { padding: 12px 14px; border-top: 1px solid var(--border); display: none; }
.api-doc.open .api-doc-body { display: block; }
.api-doc-body pre {
    background: #1e2430; color: #d5e0f2; border-radius: 6px; padding: 12px; overflow-x: auto;
    font-size: 12px; margin: 8px 0; font-family: Consolas, monospace; text-align: left;
}
.zalo-profile { display: flex; align-items: center; gap: 14px; }
.zalo-profile img { width: 56px; height: 56px; border-radius: 50%; }
.hint { color: var(--text-sub); font-size: 12px; margin-top: 8px; }

/* ============ Toast ============ */
#toast {
    position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
    background: #303030; color: #fff; border-radius: 8px; padding: 10px 20px;
    opacity: 0; transition: opacity .3s; pointer-events: none; z-index: 200; font-size: 13px;
}
#toast.show { opacity: 1; }

@media (max-width: 768px) {
    .sidebar { width: 100%; }
    .app.chat-open .sidebar { display: none; }
    .app:not(.chat-open) .chat { display: none; }
    .back-btn { display: inline-block !important; }
}
.back-btn { display: none; }