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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #1a1a2e;
    line-height: 1.6;
    background: #fff;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
}

h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

/* Navbar */

.navbar {
    background: #0f172a;
    padding: 16px 0;
    border-bottom: 1px solid #1e293b;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #fff;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-contact-label {
    color: #94a3b8;
    font-size: 0.9rem;
    margin-right: -8px;
}

.nav-contact {
    color: #60a5fa;
    text-decoration: none;
    font-size: 0.9rem;
}

.nav-contact:visited {
    color: #60a5fa;
}

.nav-contact:hover {
    color: #93bbfc;
    text-decoration: underline;
}

.nav-sep {
    color: #475569;
    font-size: 0.9rem;
    margin: 0 -10px;
}

.nav-btn {
    background: #2563eb;
    color: #fff;
    padding: 10px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    transition: background 0.2s;
}

.nav-btn:hover {
    background: #1d4ed8;
}

/* Hero */

.hero {
    background: linear-gradient(rgba(15, 23, 42, 0.75), rgba(15, 23, 42, 0.85)), url('img_1.png') center/cover no-repeat;
    color: #fff;
    padding: 80px 24px 80px;
    text-align: center;
}

.hero h1 {
    font-size: 2.6rem;
    max-width: 800px;
    margin: 0 auto 24px;
    line-height: 1.2;
}

.hero-sub {
    font-size: 1.2rem;
    color: #94a3b8;
    max-width: 650px;
    margin: 0 auto 40px;
}

.btn {
    display: inline-block;
    background: #2563eb;
    color: #fff;
    padding: 16px 36px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background: #1d4ed8;
}

/* Sections */

section {
    padding: 80px 0;
}

section:nth-child(even) {
    background: #f8fafc;
}

/* Grid */

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* Cards - problems */

.card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 32px 24px;
    text-align: center;
}

.card-icon {
    width: 56px;
    height: 56px;
    background: #fee2e2;
    color: #dc2626;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.card p {
    color: #475569;
    font-size: 0.95rem;
}

/* Two columns */

.two-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.col ul {
    list-style: none;
    padding: 0;
}

.col li {
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
    color: #334155;
}

.col li:last-child {
    border-bottom: none;
}

.col h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 3px solid #2563eb;
}

/* Task cards */

.task-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 28px 24px;
}

.task-icon {
    width: 44px;
    height: 44px;
    background: #eff6ff;
    color: #2563eb;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.task-card h3 {
    color: #2563eb;
}

.task-card p {
    color: #475569;
    font-size: 0.95rem;
}

/* Example / Comparison */

.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.comp-col {
    border-radius: 12px;
    padding: 32px;
}

.comp-col h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
}

.comp-col ul {
    list-style: none;
    padding: 0;
}

.comp-col li {
    padding: 10px 0;
    padding-left: 28px;
    position: relative;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.comp-col li:last-child {
    border-bottom: none;
}

.comp-before {
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.comp-before li::before {
    content: "\2717";
    position: absolute;
    left: 0;
    color: #dc2626;
    font-weight: 700;
}

.comp-after {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.comp-after li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: #16a34a;
    font-weight: 700;
}

/* Cases */

.case {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 40px 36px;
    margin-bottom: 32px;
}

.case:last-child {
    margin-bottom: 0;
}

.case > h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.case-desc {
    color: #64748b;
    margin-bottom: 28px;
}

.case-details {
    margin-top: 24px;
    padding: 20px 24px;
    background: #f8fafc;
    border-radius: 10px;
    color: #334155;
    font-size: 0.95rem;
}

.case-link {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.case-link:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

/* Why us */

.why-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 32px 24px;
    border-top: 4px solid #2563eb;
}

.why-icon {
    width: 52px;
    height: 52px;
    background: #eff6ff;
    color: #2563eb;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.why-card p {
    color: #475569;
}

/* Steps */

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.step {
    text-align: center;
    padding: 24px 16px;
}

.step-icon {
    width: 56px;
    height: 56px;
    background: #2563eb;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.step p {
    color: #475569;
    font-size: 0.95rem;
}

/* Contact form */

.contact {
    background: #0f172a;
    color: #fff;
    padding: 80px 0;
}

.contact h2 {
    color: #fff;
}

.contact-sub {
    text-align: center;
    color: #94a3b8;
    margin-bottom: 40px;
    margin-top: -24px;
}

.form {
    max-width: 520px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form input,
.form textarea {
    padding: 14px 18px;
    border: 1px solid #334155;
    border-radius: 8px;
    background: #1e293b;
    color: #fff;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.form input::placeholder,
.form textarea::placeholder {
    color: #64748b;
}

.form input:focus,
.form textarea:focus {
    border-color: #2563eb;
}

.form .btn {
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
}

.contact-email {
    text-align: center;
    margin-top: 24px;
    color: #94a3b8;
}

.contact-email a {
    color: #60a5fa;
    text-decoration: none;
}

.contact-email a:hover {
    text-decoration: underline;
}

/* Footer */

footer {
    background: #0f172a;
    border-top: 1px solid #1e293b;
    padding: 32px 0;
    color: #64748b;
    font-size: 0.9rem;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #94a3b8;
    font-weight: 600;
}

.footer-logo-img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

footer a {
    color: #94a3b8;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive */

@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-sub {
        font-size: 1rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .two-cols {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

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

    .footer-inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-contact,
    .nav-contact-label,
    .nav-sep {
        display: none;
    }

    .nav-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .logo-text {
        font-size: 1rem;
    }
    .steps {
        grid-template-columns: 1fr;
    }

    section {
        padding: 56px 0;
    }

    .hero {
        padding: 64px 24px 56px;
    }
}