:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #eef2ff;
    --bg: #f8fafc;
    --card: #ffffff;
    --sidebar: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --accent: #10b981;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
}

nav {
    width: 300px;
    background: var(--sidebar);
    border-right: 1px solid var(--border);
    padding: 30px 20px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

nav a {
    text-decoration: none;
}



.nav-group {
    margin-bottom: 25px;

}

.nav-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 10px;
    padding-left: 12px;
    letter-spacing: 1px;
}

.nav-item {
    padding: 12px 16px;
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
    transition: 0.2s;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-item.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.container {
    margin-left: 300px;
    padding: 50px;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    
}

main {
    flex: 1;
}

.main-content {
    max-width: 700px;
    margin: auto;
    
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 30px;
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 30px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

input,
select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
    outline: none;
    transition: 0.2s;
    background: #fcfdfe;
    box-sizing: border-box;
}

input:focus,
select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.result-area {
    background: #f1f5f9;
    border-radius: var(--radius);
    padding: 20px;
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#res-label {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

.result-val {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.actions {
    margin-top: 20px;
}

.btn-export {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    transition: 0.2s;
}

.btn-export:hover {
    background: var(--primary-dark);
}

.sidebar-footer {
    margin-top: auto;
    padding: 1rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer-text {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 500;
}

.footer-text a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}


@media (max-width: 768px) {
  

nav a {
    text-decoration: none;
}



.nav-group {
    margin-bottom: 25px;

}

.nav-label {
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 5px;
    padding-left: 5px;
    letter-spacing: 1px;
}

.nav-item {
    
    padding: 5px 10px;
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 400;
    transition: 0.2s;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-item.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}
nav {
    width: 100vw;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 10px 10px;
    display: grid;
    gap: 20px;
    flex-wrap: wrap;
    overflow-y: visible;
}
img {

    width: 120px;
    height: auto;
    margin-bottom: 0;
}
.nav-group {
    display: flex;
    gap: 10px;
    margin-bottom: 0;
}

.nav-label {
    display: none;
}

.nav-item {
    padding: 8px 16px;
    margin-bottom: 0;
    font-size: 0.85rem;
}

 

    .container {
        margin-left: 0;
        padding: 20px;  
        min-height: auto;
    }
}