/* ===== Base ===== */
:root {
    --blue-900: #0a2540;
    --blue-700: #0b5ed7;
    --blue-600: #1976f0;
    --blue-100: #e8f1fd;
    --blue-50: #f4f9ff;
    --white: #ffffff;
    --text-dark: #1b2a3c;
    --text-muted: #5a6b7d;
    --radius: 12px;
    --shadow: 0 6px 20px rgba(10, 37, 64, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.6;
}

h1, h2, h3 {
    margin: 0 0 0.5em;
    color: var(--blue-900);
}

p {
    margin: 0 0 1em;
    color: var(--text-muted);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 999px;
    font-weight: 600;
    transition: all 0.2s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--blue-600);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--blue-700);
}

.btn-outline {
    border-color: var(--blue-600);
    color: var(--blue-600);
    background-color: transparent;
}

.btn-outline:hover {
    background-color: var(--blue-100);
}

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

.btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

/* ===== Navbar ===== */
.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(10, 37, 64, 0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--blue-900);
}

.logo span {
    color: var(--blue-600);
}

.nav-menu ul {
    display: flex;
    gap: 32px;
}

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

.nav-menu a:hover {
    color: var(--blue-600);
}

/* ===== Hero ===== */
.hero {
    background: linear-gradient(135deg, var(--blue-50) 0%, var(--blue-100) 100%);
    padding: 100px 0;
    text-align: center;
}

.hero-inner {
    max-width: 780px;
}

.hero h1 {
    font-size: 2.75rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.1rem;
    margin: 20px auto 32px;
    max-width: 640px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Section common ===== */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2rem;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 48px;
}

/* ===== Services cards ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.card {
    background-color: var(--white);
    border: 1px solid #e3ecf7;
    border-radius: var(--radius);
    padding: 32px 24px;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.card h3 {
    font-size: 1.2rem;
}

/* ===== Why us ===== */
.why-us {
    background-color: var(--blue-50);
}

.why-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.why-item {
    background-color: var(--white);
    border-radius: var(--radius);
    padding: 28px 22px;
    box-shadow: var(--shadow);
}

.why-number {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--blue-600);
    margin-bottom: 8px;
}

.why-item h3 {
    font-size: 1.1rem;
}

/* ===== CTA final ===== */
.cta-final {
    background: linear-gradient(135deg, var(--blue-700) 0%, var(--blue-900) 100%);
    padding: 80px 0;
    text-align: center;
}

.cta-final-inner {
    max-width: 640px;
}

.cta-final h2 {
    color: var(--white);
}

.cta-final p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
}

.cta-final-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--blue-900);
    color: rgba(255, 255, 255, 0.75);
    padding: 48px 0 0;
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: space-between;
    padding-bottom: 32px;
}

.footer-brand .logo {
    color: var(--white);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    max-width: 320px;
    margin-top: 8px;
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.75);
    margin: 0 0 6px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .navbar-inner {
        flex-direction: column;
        height: auto;
        padding: 16px 0;
        gap: 12px;
    }

    .nav-menu ul {
        gap: 18px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: 64px 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .section {
        padding: 56px 0;
    }
}