/* Minimalist White & Blue Theme */
:root {
    --primary-blue: #1a73e8;       /* Clean Professional Blue */
    --light-blue: #e8f0fe;         /* Very soft blue for active/hover states */
    --bg-white: #ffffff;
    --bg-off-white: #f8f9fa;       /* Light grey/blue for body background */
    --text-main: #3c4043;          /* Dark grey instead of harsh black */
    --text-light: #5f6368;
    --border-color: #dadce0;
}

* { 
    margin: 0; padding: 0; box-sizing: border-box; 
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; 
}

body { 
    background-color: var(--bg-off-white); 
    color: var(--text-main); 
    font-size: 14px; /* Small, professional font size */
    line-height: 1.6;
}

.container { max-width: 1000px; margin: 0 auto; padding: 0 15px; }

/* Navbar */
.navbar { 
    background: var(--bg-white); 
    border-bottom: 1px solid var(--border-color);
    padding: 12px 20px;
    display: flex; justify-content: space-between; align-items: center;
}
.navbar .logo a { 
    text-decoration: none; color: var(--primary-blue); 
    font-weight: 600; font-size: 16px; letter-spacing: 0.5px;
}
.nav-links a { 
    text-decoration: none; color: var(--text-light); 
    margin-left: 20px; font-size: 13px; font-weight: 500; transition: color 0.2s;
}
.nav-links a:hover { color: var(--primary-blue); }

/* Minimal Hero Section */
.hero { 
    text-align: center; padding: 40px 15px 30px; 
    background: var(--bg-white); border-bottom: 1px solid var(--border-color);
}
.hero h1 { font-size: 20px; font-weight: 600; color: var(--text-main); margin-bottom: 8px; }
.hero p { font-size: 13px; color: var(--text-light); }
.positive-points {
    display: flex; justify-content: center; gap: 15px; margin-top: 15px; font-size: 12px; color: var(--text-light);
}
.positive-points span { background: var(--light-blue); color: var(--primary-blue); padding: 4px 10px; border-radius: 4px; }

/* Dashboard Grid */
.calc-grid { 
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
    gap: 15px; padding: 30px 0; 
}
.calc-box { 
    background: var(--bg-white); border: 1px solid var(--border-color); 
    border-radius: 8px; padding: 20px; text-decoration: none; 
    color: var(--text-main); transition: all 0.2s ease;
    display: flex; flex-direction: column; align-items: flex-start;
}
.calc-box:hover { 
    border-color: var(--primary-blue); box-shadow: 0 4px 12px rgba(26,115,232,0.08); 
    transform: translateY(-2px);
}
.calc-box .icon { 
    background: var(--light-blue); color: var(--primary-blue); 
    width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; 
    border-radius: 6px; margin-bottom: 12px; font-size: 16px;
}
.calc-box h3 { font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.calc-box p { font-size: 12px; color: var(--text-light); line-height: 1.4; }

/* Calculator UI Layout */
.calc-wrapper {
    display: flex; gap: 20px; background: var(--bg-white); 
    border: 1px solid var(--border-color); border-radius: 8px; 
    padding: 25px; margin-top: 20px; flex-wrap: wrap;
}
.calc-form { flex: 1; min-width: 280px; }
.calc-result { flex: 1; min-width: 280px; border-left: 1px solid var(--border-color); padding-left: 20px; text-align: center;}

.input-group { margin-bottom: 15px; }
.input-group label { display: block; font-size: 12px; color: var(--text-light); margin-bottom: 4px; }
.input-group input { 
    width: 100%; padding: 10px; border: 1px solid var(--border-color); 
    border-radius: 4px; font-size: 14px; color: var(--text-main); outline: none;
}
.input-group input:focus { border-color: var(--primary-blue); }

.btn-primary { 
    background: var(--primary-blue); color: #fff; border: none; 
    padding: 10px 15px; font-size: 13px; font-weight: 500; border-radius: 4px; 
    cursor: pointer; width: 100%; transition: background 0.2s;
}
.btn-primary:hover { background: #1557b0; }

.result-amount { font-size: 24px; font-weight: 700; color: var(--primary-blue); margin: 10px 0; }

@media (max-width: 768px) {
    .calc-wrapper { flex-direction: column; }
    .calc-result { border-left: none; border-top: 1px solid var(--border-color); padding-left: 0; padding-top: 20px; }
}