:root {
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 68px;
    --sidebar-bg: #0d1117;
    --sidebar-border: rgba(255,255,255,0.06);
    --main-bg: #161b22;
    --card-bg: #1c2333;
    --card-hover: #212d40;
    --border-color: rgba(255,255,255,0.08);
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-blue: #3b82f6;
    --accent-blue-dark: #2563eb;
    --accent-green: #10b981;
    --accent-purple: #8b5cf6;
    --accent-orange: #f97316;
    --accent-red: #ef4444;
    --nav-active-bg: rgba(59,130,246,0.15);
    --nav-hover-bg: rgba(255,255,255,0.05);
    --input-bg: rgba(255,255,255,0.07);
    --input-border: rgba(255,255,255,0.12);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--main-bg);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========== AUTH PAGES ========== */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: stretch;
    background: #f0f4ff;
}
.auth-left {
    width: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 50px;
    background: #fff;
}
.auth-right {
    width: 50%;
    background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 40%, #06b6d4 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.auth-right::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='4'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.auth-illustration {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    padding: 40px;
}
.auth-illustration h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.auth-illustration p {
    font-size: 1rem;
    opacity: 0.85;
}
.auth-illustration .illus-icon {
    font-size: 5rem;
    margin-bottom: 24px;
    display: block;
}
.auth-box {
    width: 100%;
    max-width: 420px;
}
.auth-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    text-decoration: none;
    color: #1e293b;
}
.auth-brand .brand-icon-auth {
    width: 42px;
    height: 42px;
    background: #2563eb;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}
.auth-brand span {
    font-size: 1.6rem;
    font-weight: 800;
    color: #1e293b;
}
.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 6px;
}
.auth-subtitle {
    color: #64748b;
    margin-bottom: 28px;
    font-size: 0.9rem;
}
.auth-input-group {
    position: relative;
    margin-bottom: 16px;
}
.auth-input-group .input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    pointer-events: none;
}
.auth-input-group input {
    width: 100%;
    padding: 13px 14px 13px 44px;
    border: 1.5px solid #e2e8f0;
    border-radius: 12px;
    font-size: 0.92rem;
    font-family: 'Nunito', sans-serif;
    background: #f8fafc;
    color: #1e293b;
    transition: var(--transition);
    outline: none;
}
.auth-input-group input:focus {
    border-color: #3b82f6;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}
.auth-input-group input::placeholder { color: #94a3b8; }
.toggle-password {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: #94a3b8;
    padding: 0;
}
.toggle-password:hover { color: #3b82f6; }
.auth-terms {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}
.auth-terms input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #3b82f6;
    cursor: pointer;
}
.auth-terms label {
    font-size: 0.88rem;
    color: #64748b;
    cursor: pointer;
}
.auth-terms label a { color: #3b82f6; }
.btn-auth {
    width: 100%;
    padding: 13px;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    font-family: 'Nunito', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.3px;
}
.btn-auth:hover { background: #1d4ed8; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(37,99,235,0.35); }
.btn-auth:active { transform: translateY(0); }
.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.88rem;
    color: #64748b;
}
.auth-footer a { color: #2563eb; font-weight: 600; text-decoration: none; }
.auth-footer a:hover { text-decoration: underline; }
.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0;
    color: #94a3b8;
    font-size: 0.82rem;
}
.auth-divider::before, .auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e2e8f0;
}

/* ========== APP LAYOUT ========== */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* ========== SIDEBAR ========== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0; top: 0; bottom: 0;
    z-index: 100;
    transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    min-width: 0;
}
.sidebar.collapsed { width: var(--sidebar-collapsed-width) !important; }
.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-text { opacity: 0; width: 0; overflow: hidden; pointer-events: none; }
.sidebar.collapsed .sidebar-toggle-btn svg { transform: rotate(180deg); }
.sidebar-header {
    display: flex;
    align-items: center;
    padding: 18px 16px;
    border-bottom: 1px solid var(--sidebar-border);
    min-height: 64px;
    overflow: hidden;
}
.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    overflow: hidden;
    white-space: nowrap;
}
.brand-icon {
    width: 36px; height: 36px;
    background: var(--accent-blue);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    color: white; flex-shrink: 0;
}
.brand-text {
    font-size: 1.15rem; font-weight: 800;
    color: var(--text-primary);
    transition: var(--transition);
    white-space: nowrap;
}
.sidebar.collapsed .sidebar-toggle-btn svg { transform: rotate(180deg); }
.sidebar-nav {
    flex: 1;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
    overflow-x: hidden;
}
.sidebar-nav::-webkit-scrollbar { width: 3px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}
.nav-item:hover { background: var(--nav-hover-bg); color: var(--text-primary); }
.nav-item.active { background: var(--nav-active-bg); color: var(--accent-blue); }
.nav-item.active .nav-icon { color: var(--accent-blue); }
.nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    position: relative;
}
.nav-text {
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
    display: flex;
    align-items: center;
}
.sidebar.collapsed .nav-text { opacity: 0; width: 0; overflow: hidden; }
.nav-logout { color: var(--accent-red) !important; }
.nav-logout:hover { background: rgba(239,68,68,0.1) !important; }
.sidebar-footer {
    padding: 10px;
    border-top: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow: hidden;
}
.badge-dot {
    position: absolute;
    top: 0;
    right: 0;
    width: 8px;
    height: 8px;
    background: var(--accent-red);
    border-radius: 50%;
    border: 2px solid var(--sidebar-bg);
}

/* ========== MAIN CONTENT ========== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    transition: var(--transition);
    min-height: 100vh;
}
.main-content.collapsed {
    margin-left: var(--sidebar-collapsed-width);
}
.page-header {
    padding: 28px 32px 0;
}
.page-header h1 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
}
.page-header p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-top: 3px;
}
.page-body {
    padding: 24px 32px;
}

/* ========== STAT CARDS ========== */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    cursor: default;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }
.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}
.stat-icon.blue { background: rgba(59,130,246,0.2); color: #3b82f6; }
.stat-icon.green { background: rgba(16,185,129,0.2); color: #10b981; }
.stat-icon.purple { background: rgba(139,92,246,0.2); color: #8b5cf6; }
.stat-icon.orange { background: rgba(249,115,22,0.2); color: #f97316; }
.stat-info h3 { font-size: 1.6rem; font-weight: 800; color: var(--text-primary); }
.stat-info p { font-size: 0.8rem; color: var(--text-secondary); margin: 0; }

/* ========== CARDS ========== */
.qc-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}
.qc-card-header {
    padding: 18px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.qc-card-header h5 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}
.qc-card-body { padding: 12px; }

/* ========== FRIEND REQUESTS ========== */
.request-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px;
    border-radius: 12px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    margin-bottom: 10px;
    transition: var(--transition);
}
.request-item:hover { background: var(--card-hover); }
.request-item:last-child { margin-bottom: 0; }
.req-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}
.req-avatar-placeholder {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: white;
    flex-shrink: 0;
}
.req-info { flex: 1; min-width: 0; }
.req-info h6 { font-weight: 700; margin: 0 0 2px; font-size: 0.92rem; color: var(--text-primary); }
.req-info small { color: var(--text-muted); font-size: 0.8rem; }
.req-actions { display: flex; gap: 8px; flex-shrink: 0; }
.btn-accept {
    padding: 7px 18px;
    background: var(--accent-green);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 700;
    font-family: 'Nunito', sans-serif;
    cursor: pointer;
    transition: var(--transition);
}
.btn-accept:hover { background: #059669; }
.btn-decline {
    padding: 7px 18px;
    background: var(--accent-red);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 700;
    font-family: 'Nunito', sans-serif;
    cursor: pointer;
    transition: var(--transition);
}
.btn-decline:hover { background: #dc2626; }

/* ========== MESSAGES ========== */
.messages-layout {
    display: flex;
    height: calc(100vh - 64px);
    overflow: hidden;
}
.conv-list {
    width: 320px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}
.conv-search {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}
.conv-search input {
    width: 100%;
    padding: 10px 14px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Nunito', sans-serif;
    font-size: 0.88rem;
    outline: none;
    transition: var(--transition);
}
.conv-search input:focus { border-color: var(--accent-blue); }
.conv-search input::placeholder { color: var(--text-muted); }
.conv-items { flex: 1; overflow-y: auto; }
.conv-items::-webkit-scrollbar { width: 3px; }
.conv-items::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
.conv-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}
.conv-item:hover { background: var(--nav-hover-bg); }
.conv-item.active { background: var(--nav-active-bg); }
.conv-avatar-wrap { position: relative; flex-shrink: 0; }
.conv-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
}
.conv-avatar-ph {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--accent-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.88rem;
    color: white;
}
.online-dot {
    position: absolute;
    bottom: 1px;
    right: 1px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--main-bg);
}
.online-dot.online { background: var(--accent-green); }
.online-dot.offline { background: var(--text-muted); }
.conv-meta { flex: 1; min-width: 0; }
.conv-meta h6 { font-size: 0.88rem; font-weight: 700; margin: 0 0 2px; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-meta p { font-size: 0.78rem; color: var(--text-muted); margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-time { font-size: 0.72rem; color: var(--text-muted); flex-shrink: 0; }
.chat-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.chat-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--card-bg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.chat-header h6 { font-weight: 800; margin: 0; font-size: 1rem; color: #e6edf3 !important; letter-spacing: 0.1px; }
.chat-header small { color: var(--accent-green); font-size: 0.78rem; font-weight: 600; }
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.chat-messages::-webkit-scrollbar { width: 3px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
.msg-row { display: flex; align-items: flex-end; gap: 8px; margin-bottom: 4px; }
.msg-row.sent { flex-direction: row-reverse; }
.msg-row.received { flex-direction: row; }
.msg-bubble {
    max-width: 65%;
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 0.88rem;
    line-height: 1.5;
    word-break: break-word;
}
.msg-bubble.received {
    background: var(--card-bg);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}
.msg-bubble.sent {
    background: var(--accent-blue);
    color: white;
    border-bottom-right-radius: 4px;
}
.msg-time {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.msg-time.sent { text-align: right; }
.msg-time.received { text-align: left; }
.chat-input-area {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
    align-items: center;
    background: var(--main-bg);
}
.chat-input-area {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 8px;
    align-items: center;
    background: var(--main-bg);
}
.chat-input {
    flex: 1;
    width: 0; /* forces flex child to shrink/grow properly */
    min-width: 0;
    padding: 11px 14px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: 'Nunito', -apple-system, sans-serif;
    font-size: 0.88rem;
    outline: none;
    transition: var(--transition);
    resize: none;
    max-height: 120px;
    line-height: 1.5;
}
.chat-input:focus { border-color: var(--accent-blue); }
.chat-input::placeholder { color: var(--text-muted); }
.btn-send {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--accent-blue);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}
.btn-send:hover { background: var(--accent-blue-dark); transform: scale(1.05); }
.chat-empty {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-muted);
    padding: 40px;
    text-align: center;
}
.chat-empty svg { opacity: 0.3; }

/* ========== FRIENDS TABLE ========== */
.friends-search-row {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}
.qc-search {
    flex: 1;
    padding: 10px 16px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Nunito', sans-serif;
    font-size: 0.88rem;
    outline: none;
    transition: var(--transition);
}
.qc-search:focus { border-color: var(--accent-blue); }
.qc-search::placeholder { color: var(--text-muted); }
.friends-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}
.friends-table thead th {
    padding: 12px 16px;
    background: rgba(255,255,255,0.03);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    border-bottom: 1px solid var(--border-color);
}
.friends-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}
.friends-table tbody tr:hover { background: var(--nav-hover-bg); }
.friends-table tbody td {
    padding: 14px 16px;
    vertical-align: middle;
    font-size: 0.88rem;
}
.user-cell { display: flex; align-items: center; gap: 12px; }
.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.status-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}
.status-badge.online { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.status-badge.offline { background: rgba(255,255,255,0.05); color: var(--text-muted); }
.action-btns { display: flex; gap: 8px; }
.btn-action {
    width: 36px;
    height: 36px;
    border-radius: 9px;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.btn-action.msg { background: rgba(59,130,246,0.15); color: var(--accent-blue); }
.btn-action.msg:hover { background: rgba(59,130,246,0.3); }
.btn-action.remove { background: rgba(239,68,68,0.15); color: var(--accent-red); }
.btn-action.remove:hover { background: rgba(239,68,68,0.3); }

/* ========== GROUPS ========== */
.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}
.group-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
}
.group-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); border-color: rgba(59,130,246,0.3); }
.group-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    font-size: 1.3rem;
}
.group-name { font-weight: 700; font-size: 1rem; margin-bottom: 6px; }
.group-members { font-size: 0.82rem; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; margin-bottom: 16px; }
.btn-qc {
    padding: 8px 18px;
    border-radius: 9px;
    border: none;
    font-size: 0.85rem;
    font-weight: 700;
    font-family: 'Nunito', sans-serif;
    cursor: pointer;
    transition: var(--transition);
}
.btn-qc-primary { background: var(--accent-blue); color: white; }
.btn-qc-primary:hover { background: var(--accent-blue-dark); }
.btn-qc-outline { background: transparent; color: var(--accent-blue); border: 1.5px solid var(--accent-blue); }
.btn-qc-outline:hover { background: rgba(59,130,246,0.1); }
.btn-qc-danger { background: var(--accent-red); color: white; }
.btn-qc-danger:hover { background: #dc2626; }

/* ========== PROFILE ========== */
.profile-pic-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
}
.profile-pic {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-blue);
}
.profile-pic-ph {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--accent-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    font-weight: 800;
    color: white;
    border: 3px solid rgba(59,130,246,0.5);
}
.qc-form-group { margin-bottom: 18px; }
.qc-form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: 8px;
}
.qc-input {
    width: 100%;
    padding: 11px 14px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Nunito', sans-serif;
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}
.qc-input:focus { border-color: var(--accent-blue); }
.qc-input:disabled { opacity: 0.5; cursor: not-allowed; }
.qc-input::placeholder { color: var(--text-muted); }
.gender-row { display: flex; gap: 12px; }
.gender-option {
    flex: 1;
    position: relative;
}
.gender-option input { position: absolute; opacity: 0; width: 0; height: 0; }
.gender-option label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: none;
    letter-spacing: 0;
}
.gender-option input:checked + label {
    border-color: var(--accent-blue);
    background: rgba(59,130,246,0.1);
    color: var(--accent-blue);
}
.info-grid {
    display: grid;
    gap: 12px;
}
.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}
.info-row:last-child { border-bottom: none; }
.info-label { font-size: 0.82rem; color: var(--text-secondary); font-weight: 600; }
.info-value { font-size: 0.88rem; color: var(--text-primary); font-weight: 600; }
.info-badge { padding: 3px 10px; border-radius: 20px; font-size: 0.78rem; font-weight: 700; }
.info-badge.active { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.danger-zone {
    background: rgba(239,68,68,0.05);
    border: 1px solid rgba(239,68,68,0.2);
    border-radius: 16px;
    padding: 20px;
}
.danger-zone h6 { color: var(--accent-red); font-weight: 700; margin-bottom: 6px; }
.danger-zone p { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 14px; }

/* ========== MODALS ========== */
.modal-content {
    background: #1a2035 !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 16px !important;
    color: var(--text-primary) !important;
}
.modal-header {
    border-bottom: 1px solid var(--border-color) !important;
    padding: 18px 20px !important;
}
.modal-title { font-weight: 700 !important; }
.btn-close { filter: invert(1) !important; }
.modal-body { padding: 20px !important; }
.modal-footer {
    border-top: 1px solid var(--border-color) !important;
    padding: 14px 20px !important;
}

/* ========== UTILITIES ========== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.empty-state svg { opacity: 0.25; margin-bottom: 16px; }
.empty-state p { font-size: 0.9rem; }
.loading-spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.text-accent { color: var(--accent-blue); }
.text-green { color: var(--accent-green); }
.text-purple { color: var(--accent-purple); }
.text-orange { color: var(--accent-orange); }
.fw-700 { font-weight: 700; }
.no-results { text-align: center; padding: 30px; color: var(--text-muted); font-size: 0.88rem; }

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

/* ========== RESPONSIVE ========== */
@media (max-width: 1200px) {
    .stat-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .auth-right { display: none; }
    .auth-left { width: 100%; padding: 40px 24px; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.mobile-open { transform: translateX(0); }
    .main-content { margin-left: 0 !important; }
    .stat-cards { grid-template-columns: repeat(2, 1fr); }
    .page-body { padding: 16px; }
    .conv-list { width: 280px; }
}

/* ========== SETTINGS SINGLE COLUMN ========== */
.settings-col {
    max-width: 620px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ========== THEME TOGGLE BUTTONS ========== */
.theme-toggle-wrap {
    display: flex;
    gap: 8px;
}
.theme-btn {
    padding: 8px 18px;
    border-radius: 10px;
    border: 1.5px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-secondary);
    font-size: .85rem;
    font-weight: 700;
    font-family: 'Nunito', -apple-system, sans-serif;
    cursor: pointer;
    transition: var(--transition);
}
.theme-btn:hover { border-color: var(--accent-blue); color: var(--accent-blue); }
.theme-btn.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
}

/* ========== LIGHT MODE ========== */
html[data-theme="light"] {
    --sidebar-bg:     #ffffff;
    --sidebar-border: rgba(0,0,0,0.09);
    --main-bg:        #f1f5f9;
    --card-bg:        #ffffff;
    --card-hover:     #f8fafc;
    --border-color:   rgba(0,0,0,0.09);
    --text-primary:   #1e293b;
    --text-secondary: #475569;
    --text-muted:     #94a3b8;
    --input-bg:       #f8fafc;
    --input-border:   rgba(0,0,0,0.13);
    --nav-active-bg:  rgba(59,130,246,0.12);
    --nav-hover-bg:   rgba(0,0,0,0.05);
    --accent-blue:    #2563eb;
    --accent-blue-dark: #1d4ed8;
    --accent-green:   #059669;
    --accent-purple:  #7c3aed;
    --accent-orange:  #ea580c;
    --accent-red:     #dc2626;
}

/* Light mode — sidebar */
html[data-theme="light"] .sidebar { background: var(--sidebar-bg); border-right-color: var(--sidebar-border); }
html[data-theme="light"] .sidebar-header { border-color: var(--sidebar-border); }
html[data-theme="light"] .sidebar-footer { border-color: var(--sidebar-border); }
html[data-theme="light"] .brand-text { color: #1e293b; }
html[data-theme="light"] .nav-item { color: #475569; }
html[data-theme="light"] .nav-item:hover { background: var(--nav-hover-bg); color: #1e293b; }
html[data-theme="light"] .nav-item.active { background: var(--nav-active-bg); color: var(--accent-blue); }
html[data-theme="light"] .nav-item svg { color: inherit; }
html[data-theme="light"] .sidebar-nav::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.12); }
html[data-theme="light"] .sidebar-toggle-btn { background: var(--accent-blue); border-color: #ffffff; }

/* Light mode — body & page bg */
html[data-theme="light"] body { background: var(--main-bg); color: var(--text-primary); }

/* Light mode — cards */
html[data-theme="light"] .qc-card {
    background: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: 0 1px 4px rgba(0,0,0,0.07);
}
html[data-theme="light"] .qc-card-header { border-color: var(--border-color); }
html[data-theme="light"] .qc-card-header h5 { color: var(--text-primary); }

/* Light mode — inputs */
html[data-theme="light"] .qc-input {
    background: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-primary);
}
html[data-theme="light"] .qc-input:focus { border-color: var(--accent-blue); background: #fff; }
html[data-theme="light"] .qc-search { background: var(--input-bg); border-color: var(--input-border); color: var(--text-primary); }
html[data-theme="light"] .conv-search input { background: var(--input-bg); border-color: var(--input-border); color: var(--text-primary); }
html[data-theme="light"] .chat-input { background: var(--input-bg); border-color: var(--input-border); color: var(--text-primary); }
html[data-theme="light"] .groupMsgInput { background: var(--input-bg); border-color: var(--input-border); color: var(--text-primary); }

/* Light mode — info rows */
html[data-theme="light"] .info-row { border-color: var(--border-color); }
html[data-theme="light"] .info-label { color: var(--text-secondary); }
html[data-theme="light"] .info-value { color: var(--text-primary); }

/* Light mode — stat cards */
html[data-theme="light"] .stat-card {
    background: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: 0 1px 4px rgba(0,0,0,0.07);
}
html[data-theme="light"] .stat-info h3 { color: var(--text-primary); }
html[data-theme="light"] .stat-info p  { color: var(--text-secondary); }

/* Light mode — page header */
html[data-theme="light"] .page-header h1 { color: var(--text-primary); }
html[data-theme="light"] .page-header p  { color: var(--text-secondary); }

/* Light mode — messages */
html[data-theme="light"] .msg-bubble.received { background: #e2e8f0; color: #1e293b !important; }
html[data-theme="light"] .chat-area,
html[data-theme="light"] .chat-input-area,
html[data-theme="light"] .chat-header { background: var(--card-bg); }
html[data-theme="light"] .chat-header div div:first-child { color: #1e293b !important; }
html[data-theme="light"] .chat-messages { background: var(--main-bg); }
html[data-theme="light"] .msg-time { color: #64748b !important; }

/* Light mode — conversation list */
html[data-theme="light"] .conv-list { background: var(--card-bg); border-color: var(--border-color); }
html[data-theme="light"] .conv-item { border-color: var(--border-color); }
html[data-theme="light"] .conv-item:hover { background: var(--nav-hover-bg); }
html[data-theme="light"] .conv-item.active { background: var(--nav-active-bg); }
html[data-theme="light"] .conv-meta h6 { color: #1e293b !important; }
html[data-theme="light"] .conv-meta p  { color: #64748b !important; }
html[data-theme="light"] .conv-time    { color: #94a3b8 !important; }
html[data-theme="light"] .conv-avatar-ph { color: #ffffff; }

/* Light mode — friends table */
html[data-theme="light"] .friends-table thead th { background: #f1f5f9; color: var(--text-secondary); border-color: var(--border-color); }
html[data-theme="light"] .friends-table tbody tr { border-color: var(--border-color); }
html[data-theme="light"] .friends-table tbody tr:hover { background: var(--nav-hover-bg); }
html[data-theme="light"] .friends-table tbody td { color: var(--text-primary); }

/* Light mode — request items */
html[data-theme="light"] .request-item { background: #f8fafc; border-color: var(--border-color); }
html[data-theme="light"] .request-item:hover { background: #f1f5f9; }
html[data-theme="light"] .req-info h6 { color: var(--text-primary); }

/* Light mode — danger zone */
html[data-theme="light"] .danger-zone { background: rgba(220,38,38,0.04); border-color: rgba(220,38,38,0.2); }

/* Light mode — gender option */
html[data-theme="light"] .gender-option label {
    background: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-secondary);
}
html[data-theme="light"] .gender-option input:checked + label {
    background: rgba(37,99,235,0.08);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* Light mode — modal */
html[data-theme="light"] .modal-content { background: #ffffff !important; color: var(--text-primary) !important; border-color: var(--border-color) !important; }
html[data-theme="light"] .modal-header { border-color: var(--border-color) !important; }
html[data-theme="light"] .modal-footer { border-color: var(--border-color) !important; }
html[data-theme="light"] .btn-close { filter: none !important; }

/* Light mode — scrollbar */
html[data-theme="light"] ::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); }

/* ========== UNREAD BADGE ========== */
.unread-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 20px;
    background: var(--accent-red);
    color: white;
    font-size: .68rem;
    font-weight: 800;
    line-height: 1;
}

/* ========== EMOJI & ATTACH BUTTONS ========== */
.btn-emoji, .btn-attach {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 8px;
    flex-shrink: 0;
    transition: background 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    line-height: 1;
}
.btn-emoji:hover, .btn-attach:hover { background: var(--nav-hover-bg); }

/* Emoji picker sizing */
em-emoji-picker {
    --border-radius: 12px;
    --shadow: 0 8px 24px rgba(0,0,0,0.3);
    height: 320px;
}