:root {
    --bg:       #0d0f1a;
    --surface:  #13162a;
    --surface2: #1a1e34;
    --surface3: #20253e;
    --border:   #262c46;
    --accent:   #5b6af0;
    --accent2:  #7c3aed;
    --success:  #10b981;
    --warning:  #f59e0b;
    --danger:   #ef4444;
    --text:     #dde3f5;
    --muted:    #58607e;
    --radius:   10px;
    --card-shadow: 0 1px 3px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.2);
    --sidebar-w: 60px;
    --sidebar-expanded: 240px;
    --sidebar-speed: .28s;
    --sidebar-ease: cubic-bezier(.4,0,.2,1);
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}
input, textarea, [contenteditable] {
    -webkit-user-select: text;
    -moz-user-select: text;
    user-select: text;
}

/* ═══════════════════════════════════════
   SIDEBAR
═══════════════════════════════════════ */
.sidebar {
    width: var(--sidebar-w);
    position: fixed; left: 0; top: 0; height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    z-index: 300; overflow: hidden;
    transition: width var(--sidebar-speed) var(--sidebar-ease);
}
.sidebar:hover { width: var(--sidebar-expanded); }

.sidebar-logo {
    padding: 14px 15px;
    display: flex; align-items: center; gap: 11px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap; flex-shrink: 0; min-height: 60px;
}
.logo-icon {
    width: 30px; height: 30px; flex-shrink: 0;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: #fff;
}
.logo-icon svg { width: 17px; height: 17px; }
.logo-text { font-size: 14px; font-weight: 700; line-height: 1.3; color: var(--text); opacity: 0; transition: opacity .08s; }
.logo-text small { display: block; font-size: 11px; font-weight: 400; color: var(--muted); }
.sidebar:hover .logo-text { opacity: 1; transition: opacity .15s .12s; }

.nav-section { padding: 5px 0; }
.nav-label {
    padding: 8px 20px 4px; font-size: 10px; text-transform: uppercase;
    letter-spacing: .1em; color: var(--muted); font-weight: 600;
    white-space: nowrap; opacity: 0; transition: opacity .08s;
}
.sidebar:hover .nav-label { opacity: 1; transition: opacity .15s .12s; }

.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 9px 12px; margin: 2px 8px;
    color: var(--muted); text-decoration: none;
    border-radius: 8px;
    transition: color .15s, background .15s;
    white-space: nowrap;
}
.nav-item:hover  { color: var(--text); background: var(--surface2); }
.nav-item.active { color: var(--accent); background: rgba(91,106,240,.14); }
.nav-item .icon  {
    width: 20px; height: 20px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    transition: color .15s;
}
.nav-item .icon svg { width: 18px; height: 18px; }
.nav-item.active .icon { color: var(--accent); }
.nav-text { opacity: 0; transition: opacity .08s; font-size: 13px; font-weight: 500; }
.sidebar:hover .nav-text { opacity: 1; transition: opacity .15s .12s; }
.sidebar-footer { margin-top: auto; border-top: 1px solid var(--border); padding: 6px 0; }
.nav-item.nav-logout:hover { color: var(--danger); background: rgba(239,68,68,.1); }

/* ═══════════════════════════════════════
   MAIN — full-width, overlay layout
═══════════════════════════════════════ */
.main {
    margin-left: var(--sidebar-w);
    min-height: 100vh;
    padding: 0;
    display: flex; flex-direction: column;
}
.main-content {
    flex: 1;
    padding: 22px 24px 28px;
    width: 100%;
}

/* Sidebar overlay — dims content when sidebar expands */
.main::before {
    content: '';
    position: fixed;
    inset: 0;
    left: var(--sidebar-w);
    background: rgba(5,7,20,0);
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    z-index: 200;
    pointer-events: none;
    transition:
        background var(--sidebar-speed) var(--sidebar-ease),
        backdrop-filter var(--sidebar-speed) var(--sidebar-ease),
        left var(--sidebar-speed) var(--sidebar-ease);
}
.sidebar:hover ~ .main::before {
    left: var(--sidebar-expanded);
    background: rgba(5,7,20,.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

/* ═══════════════════════════════════════
   PAGE HEADER — sticky
═══════════════════════════════════════ */
.page-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 6px 24px;
    background: var(--bg);
    border-bottom: 1px solid rgba(38,44,70,.4);
    position: sticky; top: 0; z-index: 80;
    margin: 0 -24px 16px;
    gap: 12px;
}
.page-title { font-size: 13px; font-weight: 600; letter-spacing: -.1px; }
.page-sub   { display: none; }

/* ═══════════════════════════════════════
   CARDS
═══════════════════════════════════════ */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--card-shadow);
}
.card-header {
    font-weight: 600; font-size: 14px;
    margin-bottom: 16px; padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    display: flex; justify-content: space-between; align-items: center;
}

/* ═══════════════════════════════════════
   STATS GRID
═══════════════════════════════════════ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px; margin-bottom: 22px;
}
.stat-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 18px 20px;
    box-shadow: var(--card-shadow);
    position: relative; overflow: hidden;
}
.stat-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
}
.stat-card.accent::before  { background: var(--accent); }
.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before  { background: var(--danger); }
.stat-card.accent  { border-top-color: transparent; }
.stat-card.success { border-top-color: transparent; }
.stat-card.warning { border-top-color: transparent; }
.stat-card.danger  { border-top-color: transparent; }
.stat-value { font-size: 26px; font-weight: 800; margin-bottom: 3px; letter-spacing: -.5px; }
.stat-label { color: var(--muted); font-size: 12px; font-weight: 500; }

/* ═══════════════════════════════════════
   TABLE
═══════════════════════════════════════ */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th {
    padding: 10px 14px; text-align: left;
    font-size: 11px; text-transform: uppercase; letter-spacing: .06em;
    color: var(--muted); font-weight: 600;
    border-bottom: 1px solid var(--border);
    background: var(--surface2);
}
th:first-child { border-radius: 6px 0 0 0; }
th:last-child  { border-radius: 0 6px 0 0; }
td { padding: 11px 14px; border-bottom: 1px solid var(--border); font-size: 13px; }
tr:last-child td { border-bottom: none; }
tbody tr { transition: background .12s; }
tbody tr:hover td { background: var(--surface2); }

/* ═══════════════════════════════════════
   BADGE
═══════════════════════════════════════ */
.badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 8px; border-radius: 6px; font-size: 11px; font-weight: 600;
    white-space: nowrap;
}
.badge-success { background: rgba(16,185,129,.14);  color: var(--success); }
.badge-warning { background: rgba(245,158,11,.14);  color: var(--warning); }
.badge-danger  { background: rgba(239,68,68,.14);   color: var(--danger);  }
.badge-accent  { background: rgba(91,106,240,.14);  color: var(--accent);  }
.badge-muted   { background: var(--surface3); color: var(--muted); }

/* ═══════════════════════════════════════
   BUTTONS
═══════════════════════════════════════ */
.btn {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 500;
    border: none; cursor: pointer; text-decoration: none;
    transition: background .15s, box-shadow .15s, transform .12s, opacity .12s;
    white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #4a59df; box-shadow: 0 4px 16px rgba(91,106,240,.4); transform: translateY(-1px); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #0da371; box-shadow: 0 4px 16px rgba(16,185,129,.35); transform: translateY(-1px); }
.btn-danger  { background: var(--danger); color: #fff; }
.btn-danger:hover  { background: #dc2626; box-shadow: 0 4px 16px rgba(239,68,68,.35); transform: translateY(-1px); }
.btn-outline {
    background: transparent;
    border: 1px solid var(--border); color: var(--text);
}
.btn-outline:hover { background: var(--surface2); border-color: var(--muted); }
.btn-sm { padding: 5px 10px; font-size: 12px; gap: 5px; }
.btn:active { transform: translateY(0) !important; opacity: .8; }

/* ═══════════════════════════════════════
   FORM
═══════════════════════════════════════ */
.form-group  { margin-bottom: 16px; }
.form-label  { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 500; color: var(--text); }
.form-control {
    width: 100%; padding: 9px 12px;
    background: var(--surface2);
    border: 1px solid var(--border); border-radius: 8px;
    color: var(--text); font-size: 13px; outline: none;
    transition: border-color .15s, box-shadow .15s;
    font-family: inherit;
}
.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(91,106,240,.15);
}
.form-control::placeholder { color: var(--muted); }
select.form-control  { cursor: pointer; }
textarea.form-control { min-height: 80px; resize: vertical; }
.hint { font-size: 12px; color: var(--muted); margin-top: 5px; line-height: 1.5; }
.hint a { color: var(--accent); text-decoration: none; }
.hint a:hover { text-decoration: underline; }

/* ═══════════════════════════════════════
   TOGGLE
═══════════════════════════════════════ */
.toggle { position: relative; display: inline-block; width: 44px; height: 24px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
    position: absolute; cursor: pointer; inset: 0;
    background: var(--surface3); border: 1px solid var(--border);
    border-radius: 24px; transition: .25s;
}
.toggle-slider:before {
    content: ''; position: absolute; width: 18px; height: 18px;
    left: 2px; top: 2px; background: var(--muted);
    border-radius: 50%; transition: .25s;
}
input:checked + .toggle-slider { background: var(--accent); border-color: var(--accent); }
input:checked + .toggle-slider:before { transform: translateX(20px); background: #fff; }

/* ═══════════════════════════════════════
   CHAT PANEL
═══════════════════════════════════════ */
.chat-list { height: calc(100vh - 108px); overflow-y: auto; }
.chat-item {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 16px; border-bottom: 1px solid var(--border);
    cursor: pointer; transition: background .12s;
}
.chat-item:hover, .chat-item.active { background: var(--surface2); }
.chat-avatar {
    width: 38px; height: 38px; border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px; flex-shrink: 0; color: #fff;
}
.chat-name    { font-weight: 600; font-size: 13px; }
.chat-preview { color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 160px; }
.chat-time    { color: var(--muted); font-size: 11px; margin-left: auto; flex-shrink: 0; }

/* Messages */
.messages-area { height: calc(100vh - 200px); overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.msg { max-width: 75%; }
.msg-in  { align-self: flex-start; }
.msg-out { align-self: flex-end; }
.msg-bubble {
    padding: 10px 14px; border-radius: 14px;
    font-size: 13px; line-height: 1.5;
}
.msg-in  .msg-bubble { background: var(--surface2); border-bottom-left-radius: 4px; }
.msg-out .msg-bubble { background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }
.msg-time { font-size: 10px; color: var(--muted); margin-top: 3px; }
.msg-out  .msg-time { text-align: right; }
.ai-tag { font-size: 10px; color: var(--accent); font-weight: 600; margin-bottom: 2px; letter-spacing: .03em; }

/* ═══════════════════════════════════════
   ALERT
═══════════════════════════════════════ */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; line-height: 1.5; }
.alert-success { background: rgba(16,185,129,.08); border: 1px solid rgba(16,185,129,.25); color: #34d399; }
.alert-danger  { background: rgba(239,68,68,.08);  border: 1px solid rgba(239,68,68,.25);  color: #f87171; }
.alert-warning { background: rgba(245,158,11,.08); border: 1px solid rgba(245,158,11,.25); color: #fbbf24; }

/* ═══════════════════════════════════════
   GRID LAYOUTS
═══════════════════════════════════════ */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* ═══════════════════════════════════════
   LOGIN PAGE
═══════════════════════════════════════ */
.login-wrap {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: radial-gradient(ellipse at 60% 40%, rgba(91,106,240,.12) 0%, transparent 60%), var(--bg);
}
.login-box {
    width: 380px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 16px; padding: 36px;
    box-shadow: 0 8px 40px rgba(0,0,0,.4);
}
.login-logo {
    text-align: center; font-size: 22px; font-weight: 800; margin-bottom: 28px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    letter-spacing: -.5px;
}

/* ═══════════════════════════════════════
   MODULE CARDS
═══════════════════════════════════════ */
.module-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px 20px;
    display: flex; align-items: center; justify-content: space-between;
    box-shadow: var(--card-shadow);
    transition: border-color .15s;
}
.module-card:hover { border-color: var(--muted); }
.module-info h4 { font-size: 14px; font-weight: 600; margin-bottom: 3px; }
.module-info p  { color: var(--muted); font-size: 12px; }

/* ═══════════════════════════════════════
   SCROLLBAR
═══════════════════════════════════════ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ═══════════════════════════════════════
   MODAL
═══════════════════════════════════════ */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.7);
    z-index: 1000; display: flex; align-items: center; justify-content: center;
    backdrop-filter: blur(2px);
}
.modal-box {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 14px; padding: 28px;
    width: 480px; max-width: 95vw;
    box-shadow: 0 20px 60px rgba(0,0,0,.5);
    animation: modalIn .18s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(-12px) scale(.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-title  { font-size: 16px; font-weight: 700; margin-bottom: 20px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* ═══════════════════════════════════════
   MOBILE
═══════════════════════════════════════ */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar:hover { transform: translateX(0); width: 240px; }
    .sidebar:hover ~ .main { margin-left: 0; }
    .main { margin-left: 0; }
    .main-content { padding: 16px; }
    .page-header { margin: 0 -16px 16px; padding: 14px 16px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}