/* ===== RESET & GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

:root {
    --primary: #1a365d;
    --primary-dark: #15355c;
    --secondary: #2d74da;
    --accent: #00c9ff;
    --light: #f8fafc;
    --dark: #0f172a;
    --gray: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --card-bg: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --radius: 12px;
    --transition: all 0.3s ease;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== HEADER ===== */
.site-header {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.logo:hover {
    color: var(--secondary);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.main-nav a {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    padding: 0.5rem 0;
    position: relative;
    transition: var(--transition);
}

.main-nav a:hover {
    color: var(--secondary);
}

.main-nav a.active {
    color: var(--secondary);
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--secondary);
}

.header-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    border: 2px solid transparent;
}

.btn-outline {
    background: transparent;
    border-color: var(--secondary);
    color: var(--secondary);
}

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

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

.btn-primary:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(45, 116, 218, 0.3);
}

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

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

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
    margin-bottom: 3rem;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.3rem;
    color: #cbd5e1;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== SERVICES GRID ===== */
.services {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--dark);
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--gray);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border: 1px solid #e2e8f0;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--secondary);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.service-card p {
    color: var(--gray);
    margin-bottom: 1.5rem;
}

.service-link {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.service-link:hover {
    text-decoration: underline;
}

/* ===== FEATURE STRIP ===== */
.feature-strip {
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 2.5rem 0;
    margin: 4rem 0;
}

.feature-items {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.feature-item {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
}

.feature-item .icon {
    font-size: 2.5rem;
}

.feature-item span {
    font-size: 1.2rem;
    font-weight: 600;
}

/* ===== TOOLS PREVIEW ===== */
.tools-preview {
    background: var(--light);
    padding: 3rem 0;
    border-radius: var(--radius);
    margin: 3rem 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.tool-item {
    background: white;
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.tool-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.tool-item .icon {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

.tool-item h4 {
    color: var(--dark);
    margin-bottom: 0.5rem;
}

/* ===== CTA SECTION ===== */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
    border-radius: var(--radius);
    margin: 4rem 0;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn-primary {
    background: white;
    color: var(--primary);
    font-size: 1.1rem;
    padding: 1rem 2.5rem;
}

.cta-section .btn-primary:hover {
    background: var(--light);
    transform: scale(1.05);
}

/* ===== FOOTER ===== */
.site-footer {
    background: var(--dark);
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid #334155;
    color: #94a3b8;
}

/* ===== FORM STYLES ===== */
.form-container {
    max-width: 500px;
    margin: 3rem auto;
    background: white;
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(45, 116, 218, 0.1);
}

/* ===== TOOL STYLES ===== */
.tool-container {
    background: white;
    border-radius: var(--radius);
    padding: 2.5rem;
    box-shadow: var(--shadow);
    margin: 2rem 0;
}

.tool-form {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tool-form input {
    flex: 1;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius);
    font-size: 1rem;
}

.results-container {
    background: #f8fafc;
    border-radius: var(--radius);
    padding: 2rem;
    margin-top: 2rem;
}

.result-item {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    border-left: 4px solid var(--success);
}

.result-item.warning {
    border-left-color: var(--warning);
}

.result-item.error {
    border-left-color: var(--danger);
}

/* ===== DASHBOARD ===== */
.dashboard-header {
    background: white;
    padding: 2rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-card .value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem 0;
    }

    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .feature-items {
        flex-direction: column;
        gap: 2rem;
    }

    .tool-form {
        flex-direction: column;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .form-container {
        padding: 2rem;
        margin: 2rem 1rem;
    }

    .tool-container {
        padding: 1.5rem;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}