/* File: assets/css/style.css */
:root {
    --primary: #0f4c81; /* Engineering blue */
    --secondary: #e2e8f0;
    --text-main: #334155;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --danger: #ef4444;
    --success: #22c55e;
    --border: #cbd5e1;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', system-ui, sans-serif; }

body { background-color: var(--bg-light); color: var(--text-main); }

/* Form Styles */
.form-control { width: 100%; padding: 0.75rem; margin-bottom: 1rem; border: 1px solid var(--border); border-radius: 4px; font-size: 1rem; }
.btn { display: inline-block; background: var(--primary); color: var(--white); padding: 0.75rem 1.5rem; border: none; border-radius: 4px; cursor: pointer; font-size: 1rem; width: 100%; transition: background 0.3s; }
.btn:hover { background: #0c3d66; }

/* Login Container */
.login-wrapper { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.login-card { background: var(--white); padding: 2rem; border-radius: 8px; box-shadow: var(--shadow); width: 100%; max-width: 400px; }

/* Dashboard Layout */
.app-container { display: flex; min-height: 100vh; }
.sidebar { width: 250px; background: var(--primary); color: var(--white); padding: 1.5rem; transition: transform 0.3s ease; }
.sidebar a { color: var(--secondary); text-decoration: none; display: block; padding: 0.75rem 0; font-size: 1.1rem; }
.sidebar a:hover { color: var(--white); }
.main-content { flex: 1; padding: 2rem; width: calc(100% - 250px); }

/* Dashboard Cards */
.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.card { background: var(--white); padding: 1.5rem; border-radius: 8px; box-shadow: var(--shadow); border-left: 4px solid var(--primary); }
.card h3 { font-size: 0.9rem; color: #64748b; margin-bottom: 0.5rem; }
.card .value { font-size: 1.8rem; font-weight: bold; }

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .app-container { flex-direction: column; }
    .sidebar { width: 100%; padding: 1rem; display: flex; justify-content: space-around; }
    .main-content { width: 100%; padding: 1rem; }
}