/* =============================================
   SerpVector V2 — Design System
   Modern SaaS UI built for rank tracking
   ============================================= */

/* === CSS Variables === */
:root {
    /* Brand */
    --brand: #2563eb;
    --brand-hover: #1d4ed8;
    --brand-light: #3b82f6;
    --brand-bg: #eff6ff;
    --brand-bg2: #dbeafe;

    /* Semantic */
    --success: #16a34a;
    --success-bg: #f0fdf4;
    --success-border: #bbf7d0;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --info: #0891b2;
    --info-bg: #ecfeff;

    /* Neutrals */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Layout */
    --sidebar-width: 240px;
    --sidebar-bg: var(--gray-900);
    --topbar-height: 56px;
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
    --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow: 0 4px 6px -1px rgba(0,0,0,.06), 0 2px 4px -2px rgba(0,0,0,.04);
    --shadow-md: 0 8px 16px -4px rgba(0,0,0,.08), 0 4px 6px -2px rgba(0,0,0,.04);
    --shadow-lg: 0 20px 40px -8px rgba(0,0,0,.1);

    /* Transitions */
    --ease: cubic-bezier(.4,0,.2,1);
}

/* === Reset & Base === */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { font-size:14px; scroll-behavior:smooth; }
body {
    font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
    color:var(--gray-800);
    background:var(--gray-50);
    line-height:1.5;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
}
a { color:var(--brand); text-decoration:none; transition:color .15s var(--ease); }
a:hover { color:var(--brand-hover); }
img { max-width:100%; }

/* === Typography === */
.text-xs { font-size:11px; }
.text-sm { font-size:12.5px; }
.text-md { font-size:14px; }
.text-lg { font-size:16px; }
.text-xl { font-size:20px; }
.text-muted { color:var(--gray-500); }
.text-success { color:var(--success)!important; }
.text-danger { color:var(--danger)!important; }
.text-warning { color:var(--warning)!important; }
.text-info { color:var(--info)!important; }
.fw-normal { font-weight:400; }
.fw-medium { font-weight:500; }
.fw-semibold { font-weight:600; }
.fw-bold { font-weight:700; }
.truncate { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

/* === Utilities === */
.d-flex { display:flex; }
.d-grid { display:grid; }
.align-center { align-items:center; }
.justify-between { justify-content:space-between; }
.flex-1 { flex:1; }
.flex-wrap { flex-wrap:wrap; }
.gap-1 { gap:4px; }
.gap-2 { gap:8px; }
.gap-3 { gap:12px; }
.gap-4 { gap:16px; }
.gap-5 { gap:20px; }
.mb-1 { margin-bottom:4px; }
.mb-2 { margin-bottom:8px; }
.mb-3 { margin-bottom:12px; }
.mb-4 { margin-bottom:16px; }
.mb-5 { margin-bottom:20px; }
.mb-6 { margin-bottom:24px; }
.mt-1 { margin-top:4px; }
.mt-2 { margin-top:8px; }
.mt-3 { margin-top:12px; }
.mt-4 { margin-top:16px; }
.text-center { text-align:center; }

/* === Sidebar === */
.sidebar {
    position:fixed; top:0; left:0; bottom:0;
    width:var(--sidebar-width); background:var(--sidebar-bg);
    display:flex; flex-direction:column; z-index:50;
    transition:transform .25s var(--ease);
    border-right:1px solid rgba(255,255,255,.06);
}

.sidebar-brand {
    display:flex; align-items:center; gap:12px;
    padding:20px 20px 16px; text-decoration:none;
    border-bottom:1px solid rgba(255,255,255,.06);
}
.brand-icon {
    width:34px; height:34px; border-radius:10px;
    background:var(--brand); color:#fff;
    display:flex; align-items:center; justify-content:center;
    font-weight:700; font-size:13px; letter-spacing:-.5px;
    box-shadow:0 2px 8px rgba(37,99,235,.3);
}
.brand-text { color:#fff; font-weight:700; font-size:16px; letter-spacing:-.3px; }

.sidebar-nav { flex:1; overflow-y:auto; padding:12px 0; }
.nav-section { margin-bottom:8px; }
.nav-section-title {
    font-size:10px; font-weight:600; text-transform:uppercase;
    letter-spacing:.8px; color:var(--gray-500);
    padding:8px 20px 6px;
}
.nav-item {
    display:flex; align-items:center; gap:10px;
    padding:9px 20px; color:var(--gray-400);
    font-size:13px; font-weight:500;
    text-decoration:none; transition:all .15s var(--ease);
    border-left:3px solid transparent;
    margin:1px 0;
}
.nav-item:hover { color:#fff; background:rgba(255,255,255,.04); }
.nav-item.active {
    color:#fff; background:rgba(37,99,235,.12);
    border-left-color:var(--brand);
}
.nav-item i { font-size:16px; width:20px; text-align:center; opacity:.7; }
.nav-item.active i { opacity:1; }

.sidebar-footer {
    padding:12px 16px;
    border-top:1px solid rgba(255,255,255,.06);
}
.sidebar-user {
    display:flex; align-items:center; gap:10px;
    padding:10px 12px; border-radius:var(--radius);
    text-decoration:none; transition:background .15s;
    cursor:pointer;
}
.sidebar-user:hover { background:rgba(255,255,255,.06); }
.user-avatar {
    width:34px; height:34px; border-radius:50%;
    background:var(--brand); color:#fff;
    display:flex; align-items:center; justify-content:center;
    font-size:12px; font-weight:700;
    flex-shrink:0;
}
.user-info .name { color:#fff; font-weight:600; font-size:13px; }
.user-info .role { color:var(--gray-500); font-size:11px; }

/* === Main Content === */
.main-content {
    margin-left:var(--sidebar-width);
    min-height:100vh;
    display:flex; flex-direction:column;
}

.top-bar {
    position:sticky; top:0; z-index:30;
    height:var(--topbar-height);
    background:rgba(255,255,255,.85);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--gray-200);
    display:flex; align-items:center;
    justify-content:space-between;
    padding:0 28px;
}
.top-bar h1 {
    font-size:16px; font-weight:700; color:var(--gray-900);
    letter-spacing:-.3px;
}
.top-bar-actions { display:flex; align-items:center; gap:8px; }

.content-area { padding:24px 28px 40px; flex:1; }

/* === Cards === */
.card {
    background:#fff; border-radius:var(--radius-lg);
    border:1px solid var(--gray-200);
    box-shadow:var(--shadow-xs);
    transition:box-shadow .2s var(--ease);
    overflow:hidden;
    margin-bottom:0;
}
.card:hover { box-shadow:var(--shadow-sm); }
.card-header {
    display:flex; align-items:center; justify-content:space-between;
    padding:16px 20px; border-bottom:1px solid var(--gray-100);
    background:var(--gray-50);
}
.card-header h3 {
    font-size:14px; font-weight:600; color:var(--gray-800);
    letter-spacing:-.2px; display:flex; align-items:center; gap:8px;
}
.card-body { padding:20px; }

/* === Stat Cards === */
.stat-grid {
    display:grid;
    grid-template-columns:repeat(auto-fill, minmax(140px, 1fr));
    gap:12px;
    margin-bottom:20px;
}
.stat-card {
    background:#fff; border-radius:var(--radius);
    padding:16px 18px;
    border:1px solid var(--gray-200);
    border-left:3px solid var(--gray-300);
    transition:all .2s var(--ease);
}
.stat-card:hover { box-shadow:var(--shadow-sm); transform:translateY(-1px); }
.stat-card.stat-primary { border-left-color:var(--brand); }
.stat-card.stat-success { border-left-color:var(--success); }
.stat-card.stat-warning { border-left-color:var(--warning); }
.stat-card.stat-danger { border-left-color:var(--danger); }
.stat-card.stat-info { border-left-color:var(--info); }
.stat-label { font-size:11px; font-weight:600; color:var(--gray-500); text-transform:uppercase; letter-spacing:.4px; margin-bottom:4px; }
.stat-value { font-size:24px; font-weight:700; color:var(--gray-900); letter-spacing:-1px; line-height:1.2; }
.stat-sub { font-size:11px; color:var(--gray-500); margin-top:2px; }

/* === Tables === */
.table-wrapper { overflow-x:auto; }
.data-table { width:100%; border-collapse:separate; border-spacing:0; }
.data-table th {
    font-size:11px; font-weight:600; text-transform:uppercase;
    letter-spacing:.5px; color:var(--gray-500);
    padding:10px 16px; border-bottom:1px solid var(--gray-200);
    background:var(--gray-50); text-align:left; white-space:nowrap;
}
.data-table td {
    padding:10px 16px; border-bottom:1px solid var(--gray-100);
    font-size:13px; color:var(--gray-700); vertical-align:middle;
}
.data-table tbody tr { transition:background .1s; }
.data-table tbody tr:hover { background:var(--gray-50); }
.data-table tbody tr:last-child td { border-bottom:none; }
.keyword-cell { font-weight:600; color:var(--gray-800); }
.keyword-cell a { color:var(--gray-800); }
.keyword-cell a:hover { color:var(--brand); }

/* === Buttons === */
.btn {
    display:inline-flex; align-items:center; gap:6px;
    padding:8px 16px; border-radius:var(--radius-sm);
    font-size:13px; font-weight:600; border:none;
    cursor:pointer; transition:all .15s var(--ease);
    text-decoration:none; white-space:nowrap; line-height:1.4;
}
.btn:hover { transform:translateY(-1px); }
.btn:active { transform:translateY(0); }

.btn-primary { background:var(--brand); color:#fff; box-shadow:0 1px 3px rgba(37,99,235,.2); }
.btn-primary:hover { background:var(--brand-hover); color:#fff; box-shadow:0 4px 12px rgba(37,99,235,.25); }

.btn-success { background:var(--success); color:#fff; }
.btn-success:hover { background:#15803d; color:#fff; }

.btn-danger { background:var(--danger); color:#fff; }
.btn-danger:hover { background:#b91c1c; color:#fff; }

.btn-outline {
    background:#fff; color:var(--gray-600);
    border:1.5px solid var(--gray-300);
}
.btn-outline:hover { border-color:var(--brand); color:var(--brand); background:var(--brand-bg); }

.btn-ghost { background:transparent; color:var(--gray-600); }
.btn-ghost:hover { background:var(--gray-100); color:var(--gray-800); }

.btn-sm { padding:5px 12px; font-size:12px; }
.btn-xs { padding:3px 8px; font-size:11px; border-radius:5px; }
.btn-lg { padding:12px 24px; font-size:15px; border-radius:var(--radius); }

/* === Badges === */
.badge {
    display:inline-flex; align-items:center;
    padding:2px 8px; border-radius:12px;
    font-size:11px; font-weight:600; letter-spacing:.1px;
}
.bg-primary { background:var(--brand-bg); color:var(--brand); }
.bg-success { background:var(--success-bg); color:var(--success); }
.bg-danger { background:var(--danger-bg); color:var(--danger); }
.bg-warning { background:var(--warning-bg); color:var(--warning); }
.bg-info { background:var(--info-bg); color:var(--info); }
.bg-secondary { background:var(--gray-100); color:var(--gray-600); }

/* Tag pills */
.tag-pill {
    display:inline-flex; align-items:center;
    padding:2px 8px; border-radius:10px;
    font-size:11px; font-weight:600;
}

/* === Forms === */
.form-group { margin-bottom:14px; }
.form-label {
    display:block; font-size:12px; font-weight:600;
    color:var(--gray-700); margin-bottom:5px;
}
.form-control {
    width:100%; padding:9px 12px;
    border:1.5px solid var(--gray-300); border-radius:var(--radius-sm);
    font-size:13px; color:var(--gray-800);
    background:#fff; transition:all .15s var(--ease);
    font-family:inherit; outline:none;
}
.form-control:focus {
    border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(37,99,235,.1);
}
.form-control::placeholder { color:var(--gray-400); }
select.form-control { cursor:pointer; }
textarea.form-control { resize:vertical; min-height:80px; }

/* === Alerts === */
.alert {
    display:flex; align-items:flex-start; gap:10px;
    padding:12px 16px; border-radius:var(--radius);
    font-size:13px; font-weight:500;
    margin-bottom:16px; border:1px solid;
}
.alert i { font-size:16px; margin-top:1px; }
.alert-success { background:var(--success-bg); color:var(--success); border-color:var(--success-border); }
.alert-danger { background:var(--danger-bg); color:var(--danger); border-color:var(--danger-border); }
.alert-warning { background:var(--warning-bg); color:var(--warning); border-color:var(--warning-border); }
.alert-info { background:var(--info-bg); color:var(--info); border-color:#a5f3fc; }

/* === Ranking helpers === */
.pos-badge {
    display:inline-flex; align-items:center; justify-content:center;
    min-width:32px; padding:3px 8px; border-radius:6px;
    font-size:13px; font-weight:700; font-variant-numeric:tabular-nums;
}
.pos-top3 { background:#f0fdf4; color:#16a34a; }
.pos-top10 { background:#eff6ff; color:#2563eb; }
.pos-top20 { background:#fffbeb; color:#d97706; }
.pos-top100 { background:var(--gray-100); color:var(--gray-600); }
.pos-none { background:var(--gray-100); color:var(--gray-400); }

.change-up { color:var(--success); font-weight:700; }
.change-down { color:var(--danger); font-weight:700; }
.change-same { color:var(--gray-400); }
.change-new { color:var(--info); font-weight:600; }

/* === Modals === */
.modal-backdrop {
    display:none; position:fixed; inset:0;
    background:rgba(15,23,42,.4); backdrop-filter:blur(4px);
    z-index:200; align-items:center; justify-content:center;
    padding:20px;
}
.modal-backdrop.active { display:flex; }
.modal-box {
    background:#fff; border-radius:var(--radius-lg);
    width:100%; max-width:520px; max-height:85vh;
    overflow:auto; box-shadow:var(--shadow-lg);
    animation:modalIn .2s var(--ease);
}
@keyframes modalIn { from{opacity:0;transform:scale(.95) translateY(8px)} to{opacity:1;transform:scale(1) translateY(0)} }
.modal-header {
    display:flex; align-items:center; justify-content:space-between;
    padding:18px 20px; border-bottom:1px solid var(--gray-200);
}
.modal-header h3 { font-size:16px; font-weight:700; }
.modal-close {
    width:32px; height:32px; border:none; background:var(--gray-100);
    border-radius:8px; cursor:pointer; font-size:18px; color:var(--gray-500);
    display:flex; align-items:center; justify-content:center;
    transition:all .15s;
}
.modal-close:hover { background:var(--gray-200); color:var(--gray-800); }
.modal-body { padding:20px; }
.modal-footer { padding:16px 20px; border-top:1px solid var(--gray-100); display:flex; justify-content:flex-end; gap:8px; }

/* === Filter bar === */
.filter-bar {
    display:flex; align-items:center; gap:8px; flex-wrap:wrap;
}
.filter-bar .form-control {
    width:auto; min-width:130px;
    padding:7px 10px; font-size:12px;
}
.filter-bar input[type="search"] { min-width:180px; }

/* === Pagination === */
.pagination { display:flex; gap:4px; align-items:center; }
.pagination a, .pagination span {
    display:inline-flex; align-items:center; justify-content:center;
    width:32px; height:32px; border-radius:var(--radius-sm);
    font-size:12px; font-weight:600; color:var(--gray-600);
    text-decoration:none; transition:all .15s;
    border:1px solid var(--gray-200);
}
.pagination a:hover { border-color:var(--brand); color:var(--brand); background:var(--brand-bg); }
.pagination span.active { background:var(--brand); color:#fff; border-color:var(--brand); }

/* === Empty State === */
.empty-state {
    padding:60px 20px; text-align:center;
    display:flex; flex-direction:column;
    align-items:center; gap:12px;
}
.empty-state i { font-size:48px; color:var(--gray-300); }
.empty-state p { color:var(--gray-500); font-size:14px; }

/* === Notification badge === */
.notif-badge {
    position:absolute; top:-4px; right:-4px;
    width:18px; height:18px; background:var(--danger);
    color:#fff; border-radius:50%; font-size:10px;
    font-weight:700; display:flex; align-items:center;
    justify-content:center; line-height:1;
    border:2px solid #fff;
}

/* === Bulk action bar === */
#bulk-bar { border-left:3px solid var(--brand); }

/* === Auth pages === */
.auth-wrapper {
    min-height:100vh; display:flex;
    align-items:center; justify-content:center;
    background:linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    padding:20px;
}
.auth-card {
    width:100%; max-width:420px;
    background:#fff; border-radius:var(--radius-lg);
    box-shadow:var(--shadow-md); overflow:hidden;
}
.auth-header {
    padding:32px 32px 0; text-align:center;
}
.auth-header .logo {
    display:inline-flex; align-items:center; gap:10px;
    font-weight:700; font-size:20px; color:var(--gray-900);
    margin-bottom:8px; text-decoration:none;
}
.auth-header .logo span {
    width:38px; height:38px; background:var(--brand);
    border-radius:10px; display:flex; align-items:center;
    justify-content:center; color:#fff; font-size:14px;
    box-shadow:0 2px 8px rgba(37,99,235,.3);
}
.auth-header h1 { font-size:22px; font-weight:700; color:var(--gray-900); margin-bottom:4px; }
.auth-header p { font-size:13px; color:var(--gray-500); }
.auth-body { padding:28px 32px 32px; }
.auth-footer { padding:0 32px 24px; text-align:center; font-size:13px; color:var(--gray-500); }
.auth-footer a { font-weight:600; }

/* === Detail grid === */
.detail-grid {
    display:grid;
    grid-template-columns:repeat(auto-fill, minmax(160px, 1fr));
    gap:12px;
}

/* === Mobile === */
.mobile-toggle {
    display:none; background:none; border:none;
    font-size:22px; color:var(--gray-600); cursor:pointer;
    padding:4px;
}

@media (max-width: 1024px) {
    .sidebar { transform:translateX(-100%); }
    .sidebar.open { transform:translateX(0); box-shadow:var(--shadow-lg); }
    .main-content { margin-left:0; }
    .mobile-toggle { display:flex; }
    .stat-grid { grid-template-columns:repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .content-area { padding:16px; }
    .top-bar { padding:0 16px; }
    .stat-grid { grid-template-columns:1fr 1fr; }
    .filter-bar { flex-direction:column; }
    .filter-bar .form-control { width:100%; }
}

/* === Scrollbar === */
::-webkit-scrollbar { width:6px; height:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--gray-300); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:var(--gray-400); }

/* === Animations === */
@keyframes fadeIn { from{opacity:0;transform:translateY(4px)} to{opacity:1;transform:translateY(0)} }
.card { animation:fadeIn .3s var(--ease); }

/* === Project Sub-Navigation === */
.project-nav {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg, 14px);
    padding: 6px 8px;
    box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.pnav-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 6px;
    font-size: 12.5px;
    font-weight: 500;
    color: #64748b;
    text-decoration: none;
    transition: all .15s;
    white-space: nowrap;
}
.pnav-item:hover {
    color: #2563eb;
    background: #eff6ff;
}
.pnav-item.active {
    color: #2563eb;
    background: #eff6ff;
    font-weight: 600;
}
.pnav-item i { font-size: 14px; }
@media (max-width: 768px) {
    .project-nav { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .pnav-item span { display: none; }
    .pnav-item { padding: 8px 10px; }
    .pnav-item i { font-size: 16px; }
}