:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #10b981;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --border: #e2e8f0;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Roboto', sans-serif;
    color: var(--dark);
    background-color: var(--light);
    line-height: 1.6;
}

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

a:hover {
    color: var(--primary-hover);
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.nav-menu ul {
    display: flex;
    gap: 20px;
}

.nav-menu a {
    color: var(--dark);
    font-weight: 500;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--dark);
    border-radius: 2px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: var(--white);
    padding: 40px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    color: #cbd5e1;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--secondary);
    color: var(--white);
}

.btn-secondary:hover {
    background-color: #059669;
    color: var(--white);
}

/* Services / Features */
.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--dark);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--primary);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

/* Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: var(--white);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background-color: var(--primary);
    color: var(--white);
}

/* Blog */
.blog-post {
    margin-bottom: 40px;
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.blog-post h2 {
    margin-bottom: 10px;
}

.blog-post-content {
    margin-top: 20px;
    line-height: 1.8;
}

.blog-post-content p {
    margin-bottom: 15px;
}

.blog-post-content a {
    color: #2563eb;
    text-decoration: underline;
    font-weight: 500;
}

.blog-post-content a:hover {
    color: #1d4ed8;
    text-decoration: none;
}

/* Filter */
.filter-box {
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 30px;
    display: flex;
    gap: 15px;
    align-items: flex-end;
}

/* Footer */
.footer {
    background-color: #0f172a;
    color: #cbd5e1;
    padding: 60px 0 0;
    margin-top: auto;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: #cbd5e1;
}

.footer-col a:hover {
    color: var(--white);
}

.footer-bottom {
    background-color: #020617;
    padding: 20px 0;
    text-align: center;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mb-4 {
    margin-bottom: 2rem;
}

.mt-4 {
    margin-top: 2rem;
}

/* Result Box */
.result-box {
    padding: 20px;
    border-radius: var(--radius);
    margin-top: 20px;
    display: none;
}

.result-success {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
    display: block;
}

.result-warning {
    background-color: #fef9c3;
    color: #854d0e;
    border: 1px solid #fde047;
    display: block;
}

.result-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        box-shadow: var(--shadow);
        padding: 20px;
    }

    .nav-menu.active {
        display: block;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 15px;
    }

    .menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 32px;
    }

    .filter-box {
        flex-direction: column;
    }

    .filter-box>div {
        width: 100%;
    }
}