/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --sidebar-width: 240px;
    --font: 'Inter', -apple-system, sans-serif;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
}

body { font-family: var(--font); font-size: 14px; color: var(--gray-800); background: var(--gray-50); line-height: 1.5; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--gray-900);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
}

.sidebar-brand { padding: 20px 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.brand-link { display: flex; align-items: center; gap: 10px; color: white; font-weight: 700; font-size: 16px; }
.brand-link:hover { text-decoration: none; }
.brand-icon {
    width: 32px; height: 32px;
    background: var(--primary);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700;
}
.brand-logo {
    height: 32px; width: auto; max-width: 120px;
    object-fit: contain; border-radius: 6px;
    flex-shrink: 0;
}

.sidebar-nav { flex: 1; padding: 12px 8px; display: flex; flex-direction: column; gap: 2px; }

.nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px;
    border-radius: var(--radius);
    color: var(--gray-400);
    font-weight: 500;
    transition: all .15s;
    cursor: pointer;
}
.nav-item:hover { background: rgba(255,255,255,.06); color: white; text-decoration: none; }
.nav-item.active { background: var(--primary); color: white; }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }

.sidebar-footer { padding: 12px 8px; border-top: 1px solid rgba(255,255,255,.08); }
.user-info { display: flex; align-items: center; gap: 10px; padding: 8px 12px; margin-bottom: 4px; }
.user-avatar {
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 600; color: white; flex-shrink: 0;
}
.user-name { font-size: 13px; font-weight: 500; color: white; }
.user-tier { font-size: 11px; color: var(--gray-400); text-transform: uppercase; letter-spacing: .05em; }
.logout-link { color: var(--gray-400); font-size: 13px; }

/* ===== MAIN CONTENT ===== */
.main-content { margin-left: var(--sidebar-width); flex: 1; min-width: 0; }

.page-header {
    padding: 24px 32px 20px;
    background: white;
    border-bottom: 1px solid var(--gray-200);
    display: flex; align-items: center; justify-content: space-between;
}
.page-title { font-size: 20px; font-weight: 700; color: var(--gray-900); }
.page-subtitle { font-size: 13px; color: var(--gray-500); margin-top: 2px; }

.page-body { padding: 24px 32px; }

/* ===== STATS GRID ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }

.stat-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}
.stat-label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--gray-500); margin-bottom: 8px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--gray-900); }
.stat-sub { font-size: 12px; color: var(--gray-500); margin-top: 4px; }
.stat-card.danger  { border-color: #fca5a5; background: #fff5f5; }
.stat-card.danger  .stat-value { color: var(--danger); }
.stat-card.warning { border-color: #fcd34d; background: #fffbeb; }
.stat-card.warning .stat-value { color: var(--warning); }
.stat-card.success { border-color: #86efac; background: #f0fdf4; }
.stat-card.success .stat-value { color: var(--success); }

/* ===== CARDS ===== */
.card {
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
}
.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
    display: flex; align-items: center; justify-content: space-between;
}
.card-title { font-size: 14px; font-weight: 600; color: var(--gray-900); }
.card-body { padding: 0; }

/* ===== TABLES ===== */
.table { width: 100%; border-collapse: collapse; }
.table th {
    padding: 10px 16px;
    text-align: left;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--gray-500);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}
.table td { padding: 12px 16px; border-bottom: 1px solid var(--gray-100); font-size: 13px; color: var(--gray-700); }
.table tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: var(--gray-50); }

/* ===== BADGES ===== */
.badge {
    display: inline-flex; align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .04em;
}
.badge-draft     { background: var(--gray-100); color: var(--gray-600); }
.badge-sent      { background: var(--primary-light); color: var(--primary-dark); }
.badge-viewed    { background: #ede9fe; color: #5b21b6; }
.badge-approved  { background: var(--success-light); color: var(--success); }
.badge-rejected  { background: var(--danger-light); color: var(--danger); }
.badge-paid      { background: var(--success-light); color: var(--success); }
.badge-overdue   { background: var(--danger-light); color: var(--danger); }
.badge-partial   { background: var(--warning-light); color: var(--warning); }
.badge-converted { background: #ede9fe; color: #5b21b6; }
.badge-resolved  { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.badge-cancelled { background: var(--gray-100); color: var(--gray-400); text-decoration: line-through; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 13px; font-weight: 500;
    border: none; cursor: pointer;
    transition: all .15s;
    line-height: 1;
    text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); color: white; }
.btn-secondary { background: white; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-secondary:hover { background: var(--gray-50); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 11px 24px; font-size: 15px; }

/* ===== FORMS ===== */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: var(--gray-700); margin-bottom: 6px; }
.form-control {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 14px; font-family: var(--font);
    color: var(--gray-800);
    background: white;
    transition: border-color .15s, box-shadow .15s;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.form-control.error { border-color: var(--danger); }
.form-hint { font-size: 12px; color: var(--gray-500); margin-top: 4px; }
.form-error { font-size: 12px; color: var(--danger); margin-top: 4px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ===== AUTH PAGES ===== */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--gray-50); }
.auth-card { background: white; border-radius: var(--radius-lg); padding: 40px; width: 100%; max-width: 440px; box-shadow: var(--shadow-md); border: 1px solid var(--gray-200); }
.auth-logo { text-align: center; margin-bottom: 28px; }
.auth-logo .brand-icon { width: 48px; height: 48px; font-size: 18px; margin: 0 auto 12px; border-radius: 12px; }
.auth-title { font-size: 22px; font-weight: 700; color: var(--gray-900); text-align: center; }
.auth-subtitle { font-size: 13px; color: var(--gray-500); text-align: center; margin-top: 4px; margin-bottom: 28px; }

/* ===== ALERTS ===== */
.alert { padding: 12px 16px; border-radius: var(--radius); font-size: 13px; margin-bottom: 16px; }
.alert-success { background: var(--success-light); color: var(--success); border: 1px solid #86efac; }
.alert-danger  { background: var(--danger-light); color: var(--danger); border: 1px solid #fca5a5; }
.alert-warning { background: var(--warning-light); color: var(--warning); border: 1px solid #fcd34d; }

/* ===== EMPTY STATE ===== */
.empty-state { text-align: center; padding: 48px 24px; color: var(--gray-500); }
.empty-state-title { font-size: 15px; font-weight: 600; color: var(--gray-700); margin-bottom: 6px; }
.empty-state-text { font-size: 13px; margin-bottom: 20px; }

/* ===== DASHBOARD GRID ===== */
.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .main-content { margin-left: 0; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }
    .page-header { padding: 16px; flex-direction: column; align-items: flex-start; gap: 12px; }
    .page-body { padding: 16px; }
}

/* ===== FILTER TABS ===== */
.filter-tabs { display:flex; gap:4px; flex-wrap:wrap; margin-bottom:16px; }
.filter-tab {
    padding:6px 14px; border-radius:99px; font-size:13px; font-weight:500;
    border:1px solid var(--gray-200); background:white; color:var(--gray-600);
    cursor:pointer; text-decoration:none; transition:all .15s;
    display:inline-flex; align-items:center; gap:5px;
}
.filter-tab:hover { background:var(--gray-100); color:var(--gray-900); text-decoration:none; }
.filter-tab.active { background:var(--primary); color:white; border-color:var(--primary); }
.filter-tab .tab-count {
    background:rgba(255,255,255,.25); border-radius:99px;
    padding:1px 6px; font-size:11px; font-weight:700;
}
.filter-tab:not(.active) .tab-count { background:var(--gray-100); color:var(--gray-600); }

/* ===== SEARCH BAR ===== */
.search-bar { display:flex; gap:8px; margin-bottom:16px; }
.search-input { flex:1; max-width:340px; position:relative; }
.search-input input { width:100%; padding:8px 12px 8px 36px; border:1px solid var(--gray-200); border-radius:var(--radius); font-size:14px; background:white; }
.search-input::before { content:'🔍'; position:absolute; left:10px; top:50%; transform:translateY(-50%); font-size:14px; pointer-events:none; }

/* ===== TABLE IMPROVEMENTS ===== */
.table tbody tr { cursor:pointer; transition:background .1s; }
.table tbody tr:hover { background:var(--primary-light); }
.table-actions { display:flex; gap:4px; opacity:0; transition:opacity .15s; white-space:nowrap; }
.table tbody tr:hover .table-actions { opacity:1; }

/* ===== CLIENT CARDS ===== */
.client-grid { display:grid; grid-template-columns:repeat(auto-fill, minmax(280px, 1fr)); gap:16px; }
.client-card {
    background:white; border:1px solid var(--gray-200); border-radius:var(--radius-lg);
    padding:20px; cursor:pointer; transition:all .15s; box-shadow:var(--shadow);
}
.client-card:hover { box-shadow:var(--shadow-md); border-color:var(--primary); transform:translateY(-1px); text-decoration:none; }
.client-avatar-lg {
    width:48px; height:48px; border-radius:12px; background:var(--primary);
    display:flex; align-items:center; justify-content:center;
    font-size:18px; font-weight:700; color:white; flex-shrink:0;
    margin-bottom:12px;
}
.client-card-name { font-size:15px; font-weight:700; color:var(--gray-900); margin-bottom:2px; }
.client-card-sub { font-size:12px; color:var(--gray-500); margin-bottom:12px; }
.client-card-stats { display:flex; gap:12px; padding-top:12px; border-top:1px solid var(--gray-100); }
.client-stat { flex:1; text-align:center; }
.client-stat-val { font-size:14px; font-weight:700; color:var(--gray-900); }
.client-stat-lbl { font-size:10px; color:var(--gray-400); text-transform:uppercase; letter-spacing:.05em; }

/* ===== QUICK ACTIONS BAR ===== */
.quick-actions { display:flex; gap:10px; flex-wrap:wrap; margin-bottom:24px; }
.quick-action-btn {
    display:flex; align-items:center; gap:8px; padding:12px 18px;
    background:white; border:1px solid var(--gray-200); border-radius:var(--radius-lg);
    font-size:13px; font-weight:600; color:var(--gray-700); cursor:pointer;
    text-decoration:none; transition:all .15s; box-shadow:var(--shadow);
}
.quick-action-btn:hover { border-color:var(--primary); color:var(--primary); text-decoration:none; transform:translateY(-1px); box-shadow:var(--shadow-md); }
.quick-action-btn .qa-icon { font-size:20px; }

/* ===== ACTIVITY FEED ===== */
.activity-feed { display:flex; flex-direction:column; gap:0; }
.activity-item { display:flex; align-items:flex-start; gap:12px; padding:12px 0; border-bottom:1px solid var(--gray-100); }
.activity-item:last-child { border-bottom:none; }
.activity-dot { width:8px; height:8px; border-radius:50%; background:var(--primary); flex-shrink:0; margin-top:5px; }
.activity-dot.success { background:var(--success); }
.activity-dot.warning { background:var(--warning); }
.activity-dot.danger { background:var(--danger); }
.activity-text { flex:1; font-size:13px; color:var(--gray-700); }
.activity-time { font-size:11px; color:var(--gray-400); white-space:nowrap; }

/* ===== AMOUNT DISPLAY ===== */
.amount-positive { color:var(--success); font-weight:600; }
.amount-warning { color:var(--warning); font-weight:600; }
.amount-danger { color:var(--danger); font-weight:700; }

/* ===== SETUP CHECKLIST ===== */
.setup-card { background:linear-gradient(135deg,#eff6ff,#f0fdf4); border:1px solid #bfdbfe; border-radius:var(--radius-lg); padding:24px; margin-bottom:24px; }
.setup-step { display:flex; align-items:center; gap:12px; padding:8px 0; }
.setup-step-icon { width:28px; height:28px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:13px; flex-shrink:0; }
.setup-step.done .setup-step-icon { background:var(--success); color:white; }
.setup-step.todo .setup-step-icon { background:var(--gray-200); color:var(--gray-500); }
.setup-step-text { font-size:13px; }
.setup-step.done .setup-step-text { color:var(--gray-500); text-decoration:line-through; }
.setup-step.todo .setup-step-text { font-weight:600; color:var(--gray-800); }