:root {
    --primary-color: #4f46e5; /* Indigo */
    --primary-hover: #4338ca;
    --secondary-color: #64748b;
    --bg-color: #f1f5f9;
    --text-color: #0f172a;
    --sidebar-bg: #ffffff;
    --sidebar-text: #334155;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: color 0.3s ease; }

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.sidebar-header {
    padding: 24px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.company-logo {
    max-width: 100%;
    max-height: 60px;
    border-radius: 8px;
    object-fit: contain;
}

.company-name {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.sidebar-nav ul {
    list-style: none;
    margin-top: 15px;
    padding: 0 15px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    margin-bottom: 5px;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
    color: var(--sidebar-text);
}

.sidebar-nav a:hover {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    transform: translateX(4px);
}

.logout-link {
    color: var(--danger) !important;
}
.logout-link:hover {
    background-color: rgba(239, 68, 68, 0.1) !important;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-color);
}

.main-content.full-width {
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 100%);
    position: relative;
    overflow: hidden;
}

.main-content.full-width::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79,70,229,0.15) 0%, rgba(255,255,255,0) 70%);
    top: -200px;
    left: -200px;
    border-radius: 50%;
}
.main-content.full-width::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(168,85,247,0.15) 0%, rgba(255,255,255,0) 70%);
    bottom: -150px;
    right: -150px;
    border-radius: 50%;
}

.topbar {
    height: 64px;
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 5;
}

.user-info {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--secondary-color);
}

.content-body {
    padding: 32px;
    flex: 1;
    overflow-y: auto;
}

/* UI Elements */
.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: #fff;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.3);
}

.btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 8px -1px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background-color: var(--secondary-color);
    box-shadow: 0 4px 6px -1px rgba(100, 116, 139, 0.3);
}
.btn-secondary:hover {
    background-color: #475569;
    box-shadow: 0 6px 8px -1px rgba(100, 116, 139, 0.4);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background-color: #f8fafc;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    background-color: #fff;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}

.alert {
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-danger {
    background-color: #fef2f2;
    color: var(--danger);
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #f0fdf4;
    color: var(--success);
    border: 1px solid #bbf7d0;
}

/* Auth Containers (Login / Register) */
.auth-wrapper {
    display: flex;
    width: 100%;
    max-width: 1000px;
    height: 600px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    position: relative;
    z-index: 10;
}

.auth-sidebar {
    flex: 1;
    background: linear-gradient(135deg, var(--primary-color), #818cf8);
    color: white;
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.auth-sidebar h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.auth-sidebar p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 80%;
}

.auth-form-container {
    flex: 1;
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: white;
}

.login-header {
    text-align: left;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 2rem;
    color: var(--text-color);
    margin-bottom: 8px;
    font-weight: 700;
}

.login-header p {
    color: var(--secondary-color);
    font-size: 1rem;
}

.auth-link {
    margin-top: 20px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.auth-link a {
    color: var(--primary-color);
    font-weight: 600;
}
.auth-link a:hover {
    text-decoration: underline;
}

/* Tables */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 10px;
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #f8fafc;
    font-weight: 600;
    color: var(--secondary-color);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

th:first-child { border-top-left-radius: 8px; }
th:last-child { border-top-right-radius: 8px; }

tr {
    transition: background-color 0.2s;
}

tr:hover td {
    background-color: #f1f5f9;
}

/* Dynamic Theming */
.btn { background-color: var(--primary-color); }
.company-name { background: linear-gradient(135deg, var(--primary-color), #818cf8); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.auth-sidebar { background: linear-gradient(135deg, var(--primary-color), #818cf8); }
.sidebar-nav a:hover { color: var(--primary-color); background-color: rgba(var(--primary-color-rgb), 0.1); }