:root {
    --bg-canvas: #202020;
    --bg-layer: #2C2C2C;
    --bg-layer-alt: #3D3D3D;
    --text-primary: rgba(255, 255, 255, 0.9);
    --text-secondary: rgba(255, 255, 255, 0.6);
    --accent: #60CDFF;
    --border: rgba(255, 255, 255, 0.06);
    --expense: #ff5252;
    --income: #4caf50;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background-color: var(--bg-canvas);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
}

/* --- Боковое меню --- */
.sidebar {
    width: 250px;
    background-color: var(--bg-layer);
    border-right: 1px solid var(--border);
    padding: 20px 10px;
    position: fixed;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 20px;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 30px;
    padding-left: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-menu { list-style: none; }
.nav-menu li { margin-bottom: 5px; }
.nav-menu a {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: var(--text-primary);
    border-radius: 6px;
    transition: 0.2s;
}
.nav-menu a:hover, .nav-menu a.active {
    background-color: var(--bg-layer-alt);
    color: var(--accent);
}

/* --- Основной контент --- */
.main-content {
    margin-left: 250px;
    padding: 40px;
    width: calc(100% - 250px);
}

h1 { font-size: 28px; margin-bottom: 20px; font-weight: 600; }
h2 { font-size: 20px; margin-bottom: 15px; margin-top: 30px; color: var(--text-primary); border-bottom: 1px solid var(--border); padding-bottom: 10px; }

/* --- Карточки --- */
.card { background-color: var(--bg-layer); border: 1px solid var(--border); border-radius: 8px; padding: 20px; margin-bottom: 20px; }

/* --- Формы и кнопки --- */
input[type="text"], input[type="number"], input[type="datetime-local"], select {
    width: 100%; padding: 10px; font-family: 'Segoe UI', Arial, sans-serif; font-size: 15px;
    background-color: var(--bg-canvas); color: var(--text-primary);
    border: 1px solid var(--border); border-radius: 6px; margin-bottom: 15px; outline: none;
}
input:focus, select:focus { border-color: var(--accent); }
button {
    background-color: var(--accent); color: #000; border: none; padding: 10px 20px;
    border-radius: 6px; cursor: pointer; font-weight: 600; font-family: 'Segoe UI', Arial, sans-serif;
    transition: 0.2s;
}
button:hover { background-color: #4db8e8; }