:root {
    --primary: #1e3a5f;
    --accent: #ff6b35;
    --bg: #f0f2f5;
    --sidebar-bg: #0f1e2e;
    --text: #2c3e50;
    --border: #dfe4ea;
}

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

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    color: white;
    padding: 1.5rem 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}
.sidebar__logo {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--accent);
    padding: 0 1.5rem 1.5rem;
    border-bottom: 1px solid #2a3f55;
}
.sidebar__nav { padding: 1rem 0; }
.sidebar__nav a {
    display: block;
    padding: 0.7rem 1.5rem;
    color: #cbd5e1;
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}
.sidebar__nav a:hover { background: #1a2b3e; color: white; }
.sidebar__nav a.active {
    background: #1a2b3e;
    color: var(--accent);
    border-left-color: var(--accent);
}
.nav-group {
    padding: 1rem 1.5rem 0.3rem;
    font-size: 0.8rem;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Content */
.content {
    margin-left: 260px;
    flex: 1;
    padding: 2rem;
}
.page-title {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

/* Dashboard tiles */
.tiles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.2rem;
}
.tile {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    text-decoration: none;
    color: var(--text);
    transition: transform 0.2s, box-shadow 0.2s;
    border-left: 4px solid var(--accent);
}
.tile:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.1);
}
.tile__icon { font-size: 2rem; margin-bottom: 0.5rem; }
.tile__title { font-weight: 600; color: var(--primary); margin-bottom: 0.3rem; }
.tile__desc { font-size: 0.9rem; color: #64748b; }

/* Forms */
.form-group {
    margin-bottom: 1.2rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    color: var(--primary);
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.btn {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s;
}
.btn:hover { background: #e55a2b; }

.result-box {
    background: #e8f5e9;
    border-left: 4px solid #4caf50;
    padding: 1rem;
    margin-top: 1.5rem;
    border-radius: 4px;
}
.result-box h3 {
    color: #2e7d32;
    margin-bottom: 0.5rem;
}