:root {
    /* Color Palette (from the existing Crest China brand) */
    --clr-primary-deep: #0468bf;
    --clr-primary: #0084bf;
    --clr-accent: #2ea3f2;
    --clr-accent-light: #6592e6;
    --clr-bg-light: #efefef;
    --clr-slate-dark: #1f2937;
    --clr-slate-gray: #4b5563;
    --clr-white: #FFFFFF;
    --clr-overlay: rgba(4, 42, 74, 0.55);

    /* Typography */
    --font-heading: 'Ubuntu', sans-serif;
    --font-body: 'Open Sans', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;

    /* Effects */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --shadow-soft: 0 10px 30px rgba(4, 42, 74, 0.08);
    --shadow-med: 0 20px 40px rgba(4, 42, 74, 0.14);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--clr-white);
    color: var(--clr-slate-gray);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--clr-primary-deep);
    font-weight: 700;
    line-height: 1.2;
}

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

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

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section-padding {
    padding: var(--space-xl) 0;
}

.bg-light {
    background: var(--clr-bg-light);
}

/* Components */
.btn {
    display: inline-block;
    padding: 1.1rem 2.25rem;
    border-radius: 100px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    font-family: var(--font-heading);
    font-size: 1rem;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background-color: var(--clr-primary);
    color: var(--clr-white);
    box-shadow: 0 10px 20px rgba(0, 132, 191, 0.25);
}

.btn-primary:hover {
    background-color: var(--clr-primary-deep);
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(0, 132, 191, 0.35);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--clr-primary);
    color: var(--clr-primary);
}

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

.btn-ghost {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--clr-white);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.22);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.25rem 0;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: var(--shadow-soft);
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 44px;
    width: auto;
    transition: var(--transition);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    list-style: none;
}

.nav-links a {
    font-weight: 600;
    color: var(--clr-slate-dark);
}

.nav-links a:hover {
    color: var(--clr-primary);
}

.nav-links .has-dropdown {
    position: relative;
}

.nav-links .dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--clr-white);
    box-shadow: var(--shadow-med);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0;
    min-width: 180px;
    list-style: none;
    z-index: 100;
}

.nav-links .has-dropdown:hover .dropdown {
    display: block;
}

.nav-links .dropdown li a {
    display: block;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
    white-space: nowrap;
}

.nav-call-mobile {
    display: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--clr-slate-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero Section */
.hero {
    min-height: 88vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    color: var(--clr-white);
    padding-top: 90px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(4, 104, 191, 0.88) 0%, rgba(4, 42, 74, 0.7) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 760px;
}

.hero-eyebrow {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
    color: var(--clr-white);
    background: rgba(255, 255, 255, 0.18);
    padding: 0.4rem 1rem;
    border-radius: 100px;
    margin-bottom: var(--space-sm);
}

.hero h1 {
    font-size: 3.2rem;
    color: var(--clr-white);
    margin-bottom: var(--space-sm);
    line-height: 1.15;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: var(--space-md);
    opacity: 0.92;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* Shared Page Header (inner pages) */
.page-header {
    padding: calc(var(--space-xl) + 60px) 0 var(--space-lg);
    background: linear-gradient(135deg, var(--clr-primary-deep) 0%, #032b4d 100%);
    color: var(--clr-white);
    text-align: center;
}

.page-header h1 {
    color: var(--clr-white);
    font-size: 3rem;
}

.page-header p {
    max-width: 700px;
    margin: var(--space-xs) auto 0;
    opacity: 0.85;
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .page-header h1 { font-size: 2.2rem; }
}

/* Trust Bar */
.trust-bar {
    background: var(--clr-white);
    padding: var(--space-md) 0;
    box-shadow: var(--shadow-soft);
    position: relative;
    z-index: 10;
    margin-top: -50px;
    border-radius: var(--radius-md);
}

.trust-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.trust-item {
    text-align: center;
    padding: 0 var(--space-sm);
}

.trust-item i {
    font-size: 1.6rem;
    color: var(--clr-primary);
    margin-bottom: var(--space-xs);
}

.trust-item h4 {
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.trust-item p {
    font-size: 0.88rem;
    opacity: 0.75;
}

/* Section headings */
.section-heading {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.section-heading h2 {
    font-size: 2.4rem;
}

.section-heading p {
    max-width: 650px;
    margin: var(--space-xs) auto 0;
    font-size: 1.05rem;
}

/* Product Category Cards */
.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.category-card {
    background: var(--clr-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    overflow: hidden;
    border: 1px solid rgba(4, 104, 191, 0.08);
    text-align: center;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-med);
}

.category-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.category-card .category-body {
    padding: var(--space-md);
}

.category-card h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.category-card p {
    font-size: 0.92rem;
    margin-bottom: var(--space-sm);
}

/* Product Photo Gallery */
.photo-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-sm);
}

.photo-gallery figure {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    aspect-ratio: 1 / 1;
}

.photo-gallery img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.photo-gallery figure:hover img {
    transform: scale(1.06);
}

/* Feature List (checkmark items) */
.feature-list {
    list-style: none;
    margin: var(--space-md) 0;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
}

.feature-list i {
    color: var(--clr-primary);
    margin-top: 4px;
}

/* Guarantee Callout */
.guarantee-callout {
    background: var(--clr-bg-light);
    border-left: 4px solid var(--clr-accent-light);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--clr-primary-deep);
    text-align: center;
}

/* Clients strip */
.clients-strip {
    text-align: center;
}

.clients-strip img {
    margin: 0 auto;
    border-radius: var(--radius-sm);
}

/* Catalogue Cards */
.catalogue-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.catalogue-card {
    background: var(--clr-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(4, 104, 191, 0.08);
}

.catalogue-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-med);
}

.catalogue-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.catalogue-card .catalogue-body {
    padding: var(--space-md);
    text-align: center;
}

.catalogue-tag {
    display: inline-block;
    background: var(--clr-bg-light);
    color: var(--clr-primary);
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding: 6px 14px;
    border-radius: 100px;
    margin-bottom: var(--space-xs);
}

/* Contact Form */
.contact-layout {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-xl);
}

.form-group { margin-bottom: var(--space-md); }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--clr-slate-dark); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid #ddd;
    font-family: inherit;
}

.contact-info {
    background: var(--clr-white);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.contact-info > div { margin-bottom: var(--space-md); display: flex; align-items: center; }
.contact-info i { color: var(--clr-primary); font-size: 1.4rem; margin-right: 1rem; }

.hours-table {
    width: 100%;
    font-size: 0.92rem;
}

.hours-table td { padding: 4px 0; }
.hours-table td:last-child { text-align: right; font-weight: 600; color: var(--clr-slate-dark); }

.form-alert {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    font-size: 0.95rem;
    font-weight: 500;
}

.form-alert--success {
    background: rgba(4, 104, 191, 0.1);
    color: var(--clr-primary-deep);
}

.form-alert--error {
    background: rgba(200, 60, 40, 0.1);
    color: #C83C28;
}

.form-group--honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal--visible {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
.site-footer {
    background: #042a4a;
    color: var(--clr-white);
}

.site-footer h4 { color: var(--clr-white); }

.site-footer a:hover { color: var(--clr-accent); }

.sticky-contact {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 999;
}

.sticky-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-white);
    font-size: 1.4rem;
    box-shadow: var(--shadow-med);
    transition: var(--transition);
}

.sticky-btn:hover { transform: scale(1.08); }
.sticky-whatsapp { background: #25D366; }
.sticky-call { background: var(--clr-primary); }

/* Responsive */
@media (max-width: 1024px) {
    .hero h1 { font-size: 2.6rem; }
    .trust-content { grid-template-columns: repeat(2, 1fr); }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .photo-gallery { grid-template-columns: repeat(3, 1fr); }
    .catalogue-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .section-padding { padding: var(--space-lg) 0; }
    .hero h1 { font-size: 2.1rem; }
    .hero-btns { flex-direction: column; align-items: flex-start; }
    .trust-content { grid-template-columns: 1fr; }
    .contact-layout { grid-template-columns: 1fr; }
    .photo-gallery { grid-template-columns: repeat(2, 1fr); }
    .catalogue-grid { grid-template-columns: 1fr; }

    .nav-toggle { display: flex; }
    .nav-content { position: relative; }
    .nav-call-desktop { display: none; }
    .nav-call-mobile { display: block; margin-top: var(--space-sm); }
    .nav-call-mobile .btn { width: 100%; }

    .nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--clr-white);
        box-shadow: var(--shadow-med);
        border-radius: 0 0 var(--radius-md) var(--radius-md);
        padding: 0 var(--space-md);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: var(--transition);
    }

    .nav-links.open {
        max-height: 90vh;
        overflow-y: auto;
        opacity: 1;
        padding: var(--space-md);
    }

    .nav-links li { border-bottom: 1px solid rgba(0,0,0,0.06); }
    .nav-links li:last-child { border-bottom: none; }
    .nav-links a { display: block; padding: 0.9rem 0; }
    .nav-links .dropdown { display: block; position: static; box-shadow: none; padding-left: 1rem; }
    .nav-links .has-dropdown:hover .dropdown { display: block; }
}