/* General Styles */
:root {
    --primary-color: #4a90e2;
    --secondary-color: #50e3c2;
    --background-gradient: linear-gradient(to right, #fdfbfb, #ebedee);
    --text-color: #333;
    --card-bg: #ffffff;
    --shadow: 0 10px 20px rgba(0,0,0,0.1);
    --border-radius: 15px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--background-gradient);
}

.container {
    max-width: 1100px;
    margin: auto;
    overflow: hidden;
    padding: 0 2rem;
}

h1, h2, h3 {
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

/* Navbar */
.navbar {
    background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.navbar .nav-links {
    display: flex;
    list-style: none;
}

.navbar .nav-links li {
    margin-left: 20px;
}

.navbar .nav-links a {
    color: var(--text-color);
    padding: 5px 10px;
    transition: color 0.3s ease;
}

.navbar .nav-links a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h1 {
    color: var(--primary-color);
}

/* Tool Grid */
.tool-grid {
    padding: 2rem 0;
}

.tool-grid .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: #fff;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    margin-top: 1rem;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background: #3a7ac8;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    background: #333;
    color: #fff;
}

/* Tool Page Specifics */
.tool-page main {
    padding: 2rem 0;
}

.tool-container {
    max-width: 800px;
    margin: auto;
    padding: 0 2rem;
}

.tool-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
}

.results {
    margin-top: 2rem;
    padding: 1.5rem;
    background: #f0f8ff;
    border-left: 5px solid var(--primary-color);
    border-radius: 8px;
}

.explanation, .faq {
    margin-bottom: 2rem;
}

.faq-item {
    margin-bottom: 1rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 1rem;
}

.faq-item h3 {
    font-size: 1.2rem;
    cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    h2 {
        font-size: 2rem;
    }

    .navbar .container {
        flex-direction: column;
    }

    .navbar .nav-links {
        margin-top: 1rem;
        flex-direction: column;
        align-items: center;
    }

    .navbar .nav-links li {
        margin: 0.5rem 0;
    }
}