:root {
    --primary: #2c3e50;
    --secondary: #34495e;
    --accent: #27ae60;
    --bg: #f4f4f4;
    --text: #333;
    --danger: #c0392b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--text);
    padding-bottom: 80px; /* Space for fixed header/nav on mobile if needed */
}

header {
    background-color: var(--primary);
    color: white;
    padding: 1rem;
    text-align: center;
}

#net-worth-display {
    font-size: 1.5rem;
    font-weight: bold;
    margin-top: 0.5rem;
}

nav {
    display: flex;
    overflow-x: auto;
    background: var(--secondary);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav button {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    white-space: nowrap;
}

nav button.active {
    background-color: var(--accent);
}

main {
    padding: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

/* Ensure all sections are hidden by default */
section {
    display: none; 
    padding: 1rem 0;
}

/* Show only the active section */
section.active-section {
    display: block;
}

/* Navigation button styling for the 'Proper' look */
nav button.active {
    background-color: var(--accent);
    border-bottom: 4px solid white; /* Adds a nice visual indicator */
    font-weight: bold;
}

/* Dashboard Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.card {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.card h3 { margin: 0 0 0.5rem 0; font-size: 1rem; color: #666; }
.card p { font-size: 1.5rem; font-weight: bold; margin: 0; color: var(--primary); }

/* Forms */
form {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

input, select, button {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

button[type="submit"], button {
    background-color: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
}

button:hover { opacity: 0.9; }

/* Lists */
.list-container {
    margin-top: 1rem;
}

.list-item {
    background: white;
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.list-info div { margin-bottom: 4px; }
.list-amount { font-weight: bold; color: var(--primary); }
.delete-btn { background: var(--danger); font-size: 0.8rem; padding: 0.4rem; margin-left: 10px; }

/* Data Management */
.data-group {
    background: white;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 8px;
}
.data-group button { margin-right: 0.5rem; margin-bottom: 0.5rem; }

/* Lock Screen transition */
#lock-screen {
    transition: opacity 0.4s ease;
}

/* Optional: Add a 'Lock Now' button style to your nav */
.lock-nav-btn {
    background-color: var(--danger) !important;
    font-weight: bold;
}