/* style.css */
:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    color: var(--text-primary);
    display: flex;
    height: 100vh;
}

/* Authentication Page */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100%;
}
.auth-box {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
}
.auth-box input {
    width: 100%;
    padding: 0.75rem;
    margin: 0.5rem 0;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-sizing: border-box;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: white;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}
.company-info h1 {
    color: var(--primary-color);
    margin: 0;
}
.nav-links {
    list-style: none;
    padding: 0;
    margin-top: 2rem;
}
.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    transition: all 0.2s;
}
.nav-link.active, .nav-link:hover {
    background: #eff6ff;
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}
.page {
    display: none;
}
.page.active {
    display: block;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

/* Cards & Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}
.tab {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    font-weight: 500;
}
.tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}

/* Forms & Tables */
.card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.clients-table {
    width: 100%;
    border-collapse: collapse;
}
.clients-table th, .clients-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.clients-table th {
    background: #f8fafc;
    font-weight: 600;
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-weight: 500;
}
.btn-primary { background: var(--primary-color); color: white; }
.btn-secondary { background: white; border: 1px solid var(--border-color); color: var(--text-secondary); }

/* Form inputs */
.form-row { display: flex; gap: 1rem; margin-bottom: 1rem; }
.form-group { flex: 1; display: flex; flex-direction: column; gap: 0.5rem; }
input, select { padding: 0.625rem; border: 1px solid var(--border-color); border-radius: 6px; }

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}
.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
}