:root {
    --primary: #0682b4;
    --primary-dark: #046a94;
    --accent: #31b7e9;
    --dark: #1d2a3b;
    --gray: #6b7280;
    --light: #f4f7f9;
    --white: #ffffff;
    --border: #e2e8f0;
    --radius: 10px;
    --shadow: 0 4px 20px rgba(29, 42, 59, 0.08);
}

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

body {
    font-family: 'Open Sans', 'Segoe UI', system-ui, sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background: var(--white);
}

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

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

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-links {
    display: flex;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    color: var(--dark);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 6px 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.25s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--dark);
}

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    padding: 90px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.6rem;
    font-weight: 700;
    margin-bottom: 18px;
}

.hero p {
    font-size: 1.15rem;
    max-width: 620px;
    margin: 0 auto 30px;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    background: var(--white);
    color: var(--primary);
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    color: var(--primary-dark);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}

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

.section {
    padding: 70px 0;
}

.section.alt {
    background: var(--light);
}

.section-title {
    text-align: center;
    margin-bottom: 45px;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--dark);
    margin-bottom: 10px;
}

.section-title p {
    color: var(--gray);
    max-width: 560px;
    margin: 0 auto;
}

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card .icon {
    font-size: 2rem;
    margin-bottom: 14px;
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.card p {
    color: var(--gray);
    font-size: 0.95rem;
}

.properties {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.property {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.property:hover {
    transform: translateY(-5px);
}

.property .thumb {
    height: 170px;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.85);
}

.property .body {
    padding: 20px;
}

.property .price {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.property h3 {
    margin: 6px 0;
    font-size: 1.1rem;
}

.property .meta {
    color: var(--gray);
    font-size: 0.88rem;
}

.tag {
    display: inline-block;
    background: var(--light);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    margin-bottom: 10px;
}

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

.member .avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    margin: 0 auto 14px;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.6rem;
    font-weight: 700;
}

.member h4 {
    font-size: 1rem;
    margin-bottom: 2px;
}

.member p {
    color: var(--gray);
    font-size: 0.85rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 130px;
}

.btn-submit {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 700;
    cursor: pointer;
    font-size: 0.95rem;
    transition: background 0.2s ease;
}

.btn-submit:hover {
    background: var(--primary-dark);
}

.alert {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.92rem;
}

.alert-success {
    background: #e6f7ee;
    color: #1a7f4b;
    border: 1px solid #b6e6cd;
}

.contact-info p {
    margin-bottom: 14px;
    color: var(--gray);
}

.contact-info strong {
    color: var(--dark);
}

.site-footer {
    background: var(--dark);
    color: #cbd5e1;
    padding: 45px 0 25px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.site-footer h4 {
    color: #fff;
    margin-bottom: 14px;
    font-size: 1.05rem;
}

.site-footer ul {
    list-style: none;
}

.site-footer ul li {
    margin-bottom: 8px;
}

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

.site-footer a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 18px;
    text-align: center;
    font-size: 0.85rem;
    color: #94a3b8;
}

.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    padding: 50px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.2rem;
}

@media (max-width: 860px) {
    .features,
    .properties {
        grid-template-columns: 1fr 1fr;
    }
    .members {
        grid-template-columns: 1fr 1fr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        gap: 14px;
        box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
    }
    .nav-links.open {
        display: flex;
    }
    .nav-toggle {
        display: block;
    }
    .features,
    .properties,
    .members {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 2rem;
    }
}