@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography elements */
h1, h2, h3, h4 { color: var(--text-main); font-weight: 600; }
a { color: var(--primary); text-decoration: none; transition: 0.2s; }
a:hover { color: var(--primary-hover); }

/* Layout Grid */
.app-container {
    display: flex;
    flex: 1;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.sidebar h2 {
    margin-bottom: 30px;
    font-size: 1.5rem;
    color: var(--primary);
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.nav-links li a {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    border-radius: 8px;
    color: var(--text-muted);
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-links li a:hover, .nav-links li a.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
}

/* Login Page specific */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at center, var(--bg-card) 0%, var(--bg-dark) 100%);
}

.login-container {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    padding: 40px;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.5s ease-out;
}

.login-container h2 {
    margin-bottom: 25px;
    text-align: center;
    font-size: 1.8rem;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 20px;
}

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

input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
    padding: 12px;
    font-size: 1rem;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover { background: #b91c1c; }

/* Alerts */
.alert {
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #6ee7b7;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Cards & Dashboards */
.grid {
    display: grid;
    gap: 20px;
}

.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.card h3 {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.card .value {
    font-size: 2rem;
    font-weight: 700;
}

.value.income { color: var(--success); }
.value.expense { color: var(--danger); }

/* Tables */
.table-responsive {
    overflow-x: auto;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

tr:last-child td { border-bottom: none; }

.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    display: inline-block;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Utility */
.flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.mb-4 { margin-bottom: 1rem; }
.mt-4 { margin-top: 1rem; }
.gap-2 { gap: 0.5rem; }
.w-auto { width: auto; }