:root {
    --black: #000000;
    --white: #ffffff;
    --grey-100: #f4f4f4;
    --grey-200: #e5e5e5;
    --grey-500: #6b6b6b;
    --grey-700: #333333;
    --danger: #9f2f2f;
    --success: #2f6b4f;
    --container: 1280px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: "Inter", Arial, Helvetica, sans-serif; background: var(--white); color: var(--black); line-height: 1.65; }
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--grey-200); backdrop-filter: blur(14px); }
.navbar { width: min(var(--container), 92%); min-height: 88px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.logo { position: relative; font-family: "Playfair Display", Georgia, serif; font-size: clamp(1.55rem, 2vw, 2rem); font-weight: 600; letter-spacing: -.04em; }
.logo::after { content: ""; position: absolute; left: 0; bottom: -10px; width: 54px; height: 2px; background: var(--black); }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a { position: relative; font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: -8px; width: 0; height: 1px; background: var(--black); transition: width .35s ease; }
.nav-links a:hover::after { width: 100%; }
.menu-button { display: none; border: 0; background: transparent; color: var(--black); font-size: 1.8rem; cursor: pointer; }

.hero { position: relative; min-height: 760px; padding: 90px 6%; display: grid; grid-template-columns: 1.35fr .75fr; gap: 48px; align-items: center; overflow: hidden; background: var(--black); }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,0,0,.84), rgba(0,0,0,.55) 52%, rgba(0,0,0,.35)), url("../images/dubai-hero.jpg"); background-size: cover; background-position: center; filter: grayscale(100%) contrast(1.08); }
.hero > * { position: relative; z-index: 1; }
.hero-content { max-width: 800px; }
.eyebrow { margin-bottom: 18px; color: var(--grey-500); font-size: .72rem; font-weight: 700; letter-spacing: .28em; text-transform: uppercase; }
.hero .eyebrow { color: rgba(255,255,255,.72); }
.hero h1 { max-width: 790px; margin-bottom: 28px; color: var(--white); font-family: "Playfair Display", Georgia, serif; font-size: clamp(4rem, 7vw, 7rem); font-weight: 600; line-height: .93; letter-spacing: -.055em; }
.hero-description { max-width: 640px; color: rgba(255,255,255,.84); font-size: 1.08rem; line-height: 1.8; }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-stats { display: grid; gap: 18px; }
.hero-stat { padding: 28px 30px; background: var(--white); border: 1px solid var(--white); border-radius: 0; transition: transform .4s ease; }
.hero-stat:hover { transform: translateX(-6px); }
.hero-stat-number { display: block; margin-bottom: 18px; color: var(--black); font-size: .72rem; font-weight: 700; letter-spacing: .22em; }
.hero-stat h3 { margin-bottom: 10px; color: var(--black); font-family: "Playfair Display", Georgia, serif; font-size: 1.8rem; line-height: 1.05; }
.hero-stat p { color: var(--grey-700); }

.section { padding: 120px 6%; background: var(--white); border-top: 1px solid var(--grey-200); }
.section-alt { background: var(--black); color: var(--white); }
.section-heading, .card-grid, .project-grid, .tool-layout, .history-card, .comparison-form, .comparison-results, .enquiry-form, .about-grid { width: min(var(--container), 100%); margin-left: auto; margin-right: auto; }
.section-heading { max-width: 860px; margin-bottom: 58px; }
.section-heading h2 { margin-bottom: 18px; color: inherit; font-family: "Playfair Display", Georgia, serif; font-size: clamp(3rem, 5vw, 5.4rem); font-weight: 600; line-height: .98; letter-spacing: -.05em; }
.section-heading > p:not(.eyebrow) { max-width: 780px; color: var(--grey-500); font-size: 1.06rem; }
.section-alt .section-heading > p:not(.eyebrow), .section-alt .section-heading .eyebrow { color: rgba(255,255,255,.68); }

.button, button[type="submit"] { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 14px 24px; border: 1px solid var(--black); border-radius: 0; background: var(--white); color: var(--black); font-size: .76rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; cursor: pointer; transition: background .35s ease, color .35s ease, transform .35s ease; }
.button:hover, button[type="submit"]:hover { transform: translateY(-2px); background: var(--black); color: var(--white); }
.hero .button-primary { background: var(--white); color: var(--black); border-color: var(--white); }
.hero .button-primary:hover { background: transparent; color: var(--white); }
.hero .button-secondary { background: transparent; color: var(--white); border-color: rgba(255,255,255,.75); }
.hero .button-secondary:hover { background: var(--white); color: var(--black); }

.card-grid, .about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.information-card { position: relative; min-height: 300px; padding: 34px 32px; background: var(--white); color: var(--black); border: 1px solid var(--grey-200); border-radius: 0; box-shadow: none; transition: transform .4s ease, border-color .4s ease; }
.information-card::before { content: ""; display: block; width: 52px; height: 3px; margin-bottom: 34px; background: var(--black); }
.information-card:hover { transform: translateY(-6px); border-color: var(--black); }
.information-card h3 { margin-bottom: 18px; color: var(--black); font-family: "Playfair Display", Georgia, serif; font-size: 1.75rem; line-height: 1.08; }
.information-card p { color: var(--black); opacity: 1; line-height: 1.8; }
#learn { background: var(--black); color: var(--white); }
#learn .section-heading h2 { color: var(--white); }
#learn .section-heading > p:not(.eyebrow), #learn .section-heading .eyebrow { color: rgba(255,255,255,.68); }

.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.project-card { overflow: hidden; background: var(--white); border: 1px solid var(--grey-200); border-radius: 0; box-shadow: none; }
.project-image { min-height: 230px; background-size: cover; background-repeat: no-repeat; filter: grayscale(100%); transition: filter .7s ease, transform .7s ease; }
.project-card:hover .project-image { filter: grayscale(0%); transform: scale(1.035); }
.project-image-sobha { background-image: url("../images/sobha-hartland.jpg"); background-position: center; }
.project-image-valley { background-image: url("../images/the-valley.jpg"); background-position: center 35%; }
.project-image-dubai-hills { background-image: url("../images/dubai-hills.jpg"); background-position: center 45%; }
.project-image-expo { background-image: url("../images/expo-valley.jpg"); background-position: center 55%; }
.project-image-palm { background-image: url("../images/palm-jebel-ali.jpg"); background-position: center 60%; }
.project-image-damac { background-image: url("../images/damac-lagoons.jpg"); background-position: center 48%; }
.project-content { padding: 26px; }
.project-developer { margin-bottom: 10px; color: var(--grey-500); font-size: .7rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
.project-content h3 { margin-bottom: 20px; color: var(--black); font-family: "Playfair Display", Georgia, serif; font-size: 2rem; line-height: 1.04; }
.project-information { margin: 22px 0; border-top: 1px solid var(--grey-200); border-bottom: 1px solid var(--grey-200); }
.project-info-row { display: grid; grid-template-columns: 36px 1fr; gap: 12px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--grey-200); }
.project-info-row:last-child { border-bottom: 0; }
.project-info-icon { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; font-size: .95rem; filter: grayscale(100%); }
.project-info-row strong { display: block; color: var(--black); font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; }
.project-info-row p { margin: 2px 0 0; color: var(--grey-700); font-size: .9rem; }
.project-card .button { width: 100%; }
.projects-disclaimer { width: min(var(--container), 100%); margin: 30px auto 0; padding: 20px 0; background: transparent; color: var(--black); border: 0; border-top: 1px solid var(--black); border-radius: 0; font-size: .9rem; line-height: 1.7; }

.tool-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.tool-card, .results-card, .history-card, .comparison-column { padding: 34px; background: var(--white); color: var(--black); border: 1px solid var(--grey-200); border-radius: 0; box-shadow: none; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; color: var(--black); font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 14px 2px; background: transparent; color: var(--black); border: 0; border-bottom: 1px solid #8f8f8f; border-radius: 0; outline: none; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--black); box-shadow: none; }
.results-card h3, .history-card h3, .comparison-column h3 { margin-bottom: 20px; color: var(--black); font-family: "Playfair Display", Georgia, serif; font-size: 1.8rem; }
.result-row { display: flex; justify-content: space-between; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--grey-200); }
.result-row span { color: var(--grey-700); }
.result-row strong { color: var(--black); }
.disclaimer, .empty-message { margin-top: 20px; color: var(--grey-700); font-size: .9rem; }
.history-card { margin-top: 24px; }
.history-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.text-button { border: 0; background: transparent; color: var(--black); font-weight: 700; cursor: pointer; }
.history-entry { margin-top: 14px; padding: 18px; background: var(--grey-100); border-radius: 0; }
.history-entry p { color: var(--grey-700); }
.comparison-form { margin-bottom: 24px; }
.comparison-results { grid-template-columns: 1fr 1fr; gap: 22px; }
.comparison-results:not([hidden]) { display: grid; }
.comparison-item { padding: 14px 0; border-bottom: 1px solid var(--grey-200); }
.comparison-item strong { display: block; color: var(--black); }
.comparison-item span { color: var(--grey-700); }
.enquiry-form { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
.form-group-full, .enquiry-form .button, .enquiry-form .form-message { grid-column: 1 / -1; }
.form-message { margin-top: 14px; min-height: 24px; font-weight: 700; }
.message-success { color: var(--success); }
.message-error { color: var(--danger); }
#about { background: var(--white); }
.site-footer { padding: 42px 5%; background: var(--black); color: var(--white); text-align: center; border-top: 1px solid #333333; }
.site-footer p { color: rgba(255,255,255,.72); }
.site-footer p + p { margin-top: 8px; }
.site-footer a {
    color: inherit;
    text-decoration: underline;
}

.site-footer a:hover {
    opacity: 0.8;
}

@media (max-width: 1000px) {
    .project-grid, .card-grid, .about-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
    .hero, .tool-layout { grid-template-columns: 1fr; }
    .hero { min-height: auto; padding: 90px 5%; }
    .nav-links { position: absolute; top: 88px; left: 0; right: 0; display: none; flex-direction: column; align-items: flex-start; padding: 24px 5%; background: var(--white); border-bottom: 1px solid var(--grey-200); }
    .nav-links.open { display: flex; }
    .menu-button { display: block; }
    .section { padding: 88px 5%; }
}
@media (max-width: 650px) {
    .project-grid, .card-grid, .about-grid, .enquiry-form, .comparison-results:not([hidden]) { grid-template-columns: 1fr; }
    .hero h1 { font-size: clamp(3rem, 16vw, 4.8rem); }
    .hero-actions { flex-direction: column; }
    .button { width: 100%; }
    .history-heading, .result-row { align-items: flex-start; flex-direction: column; }
}