/* ===== CSS Reset & Variables ===== */
:root {
    /* Color Palette */
    --color-primary: #1e3a8a; /* Deep modern blue */
    --color-primary-dark: #1e40af; /* Slightly lighter base */
    --color-primary-darker: #0f172a; /* Slate 900 */
    --color-accent: #f59e0b; /* Warm gold/orange for construction vibe */
    --color-accent-hover: #d97706;
    
    --color-text: #334155; /* Slate 700 */
    --color-text-light: #64748b; /* Slate 500 */
    --color-heading: #0f172a; /* Slate 900 */
    
    --color-bg: #ffffff;
    --color-bg-light: #f8fafc; /* Slate 50 */
    --color-border: #e2e8f0; /* Slate 200 */
    
    /* Typography */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;   /* 8px */
    --spacing-sm: 1rem;     /* 16px */
    --spacing-md: 1.5rem;   /* 24px */
    --spacing-lg: 2rem;     /* 32px */
    --spacing-xl: 3rem;     /* 48px */
    --spacing-2xl: 5rem;    /* 80px */
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: var(--spacing-sm);
}

.lead {
    font-size: 1.25rem;
    color: var(--color-text-light);
    font-weight: 400;
}

.text-accent {
    color: var(--color-accent);
}

.text-white, .text-white h2, .text-white p {
    color: #ffffff;
}

.text-center {
    text-align: center;
}

.subtitle {
    display: inline-block;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: 1.5rem;
}

.subtitle::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1rem;
    height: 2px;
    background-color: var(--color-accent);
}

/* ===== Utilities ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: var(--spacing-2xl) 0;
}

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

.mb-4 { margin-bottom: var(--spacing-sm); }
.mb-8 { margin-bottom: var(--spacing-lg); }
.mb-10 { margin-bottom: var(--spacing-xl); }
.mt-8 { margin-top: var(--spacing-lg); }

.display-block {
    display: block;
}

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

a:hover {
    color: var(--color-accent);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-weight: 600;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-decoration: none;
    border: 2px solid transparent;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.2);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    color: #ffffff;
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 24px rgba(245, 158, 11, 0.4);
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 300%; height: 300%;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 60%);
    transform: translate(-50%, -50%) scale(0);
    transition: transform 0.6s ease-out;
}

.btn-primary:hover::after {
    transform: translate(-50%, -50%) scale(1);
}

.btn-outline {
    background-color: transparent;
    border-color: #ffffff;
    color: #ffffff;
}

.btn-outline:hover {
    background-color: #ffffff;
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

.btn i {
    margin-left: 0.5rem;
    font-size: 1.25rem;
}

/* ===== Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-normal);
    padding: var(--spacing-md) 0;
}

.header.scrolled {
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary-darker);
    letter-spacing: -0.05em;
}

.logo i {
    color: var(--color-accent);
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link.active {
    color: var(--color-primary);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-heading);
    cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px; /* Offset for header */
}

/* Premium background pattern */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,58,138,0.6) 100%), url('assets/images/modern-home-design-sri-lanka.webp') center/cover no-repeat;
    z-index: -2;
}

.hero-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Subtle dot grid pattern */
    background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    z-index: -1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    padding-bottom: var(--spacing-2xl);
}

@media (min-width: 992px) {
    .hero-content {
        grid-template-columns: 3fr 2fr;
    }
}

.hero-text {
    color: #ffffff;
}

.hero-title {
    color: #ffffff;
    margin-top: var(--spacing-sm);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-border);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }
}

.stat-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg);
    border-radius: 1rem;
    text-align: center;
    color: #ffffff;
    transition: transform var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.1);
}

.stat-card i {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.stat-card h3 {
    color: #ffffff;
    font-size: 2.5rem;
    margin-bottom: 0;
}

.stat-card p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.floating-contact {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - var(--spacing-md) * 2);
    max-width: 1000px;
    background-color: var(--color-bg);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    z-index: 10;
}

.fc-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text);
    font-weight: 500;
}

.fc-item i {
    color: var(--color-accent);
    font-size: 1.5rem;
}

.fc-divider {
    width: 1px;
    height: 40px;
    background-color: var(--color-border);
}

/* ===== Services Section ===== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-card:hover::after {
    transform: scaleX(1);
}

.service-icon {
    width: 60px;
    height: 60px;
    background-color: var(--color-bg-light);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
    background-color: var(--color-primary);
    color: #ffffff;
}

.service-card h3 {
    font-size: 1.25rem;
}

/* ===== Features Section ===== */
.features-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

@media (min-width: 992px) {
    .features-container {
        grid-template-columns: 1fr 1fr;
    }
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform var(--transition-fast);
}

.feature-item:hover {
    transform: translateX(10px);
    background: rgba(255, 255, 255, 0.1);
}

.feature-check {
    width: 40px;
    height: 40px;
    background-color: var(--color-accent);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.25rem;
}

/* ===== About Section ===== */
.about-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

@media (min-width: 992px) {
    .about-container {
        grid-template-columns: 1fr 1fr;
    }
}

.image-wrapper {
    position: relative;
    border-radius: 1rem;
    background-color: var(--color-bg-light);
    height: 500px;
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-light) 0%, #e2e8f0 100%);
    color: var(--color-primary);
    font-size: 10rem;
    opacity: 0.5;
}

.experience-badge {
    position: absolute;
    bottom: var(--spacing-lg);
    right: -20px;
    background-color: var(--color-accent);
    color: #ffffff;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.experience-badge h3 {
    color: #ffffff;
    margin: 0;
    font-size: 1.5rem;
}

.experience-badge p {
    margin: 0;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .contact-info-list {
        flex-direction: row;
    }
}

.info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: var(--spacing-md);
    background-color: var(--color-bg-light);
    border-radius: 0.75rem;
    border: 1px solid var(--color-border);
    flex: 1;
}

.info-icon {
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.info-text span {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.info-text strong {
    color: var(--color-heading);
    font-size: 1.125rem;
}

/* ===== Contact Section ===== */
.contact-card {
    background-color: var(--color-bg);
    border-radius: 1.5rem;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 992px) {
    .contact-grid {
        grid-template-columns: 1fr 1.5fr;
    }
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.method-card {
    padding: var(--spacing-md);
    background-color: var(--color-bg-light);
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--color-border);
    transition: transform var(--transition-fast);
}

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

.method-icon {
    width: 60px;
    height: 60px;
    background-color: var(--color-primary-darker);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto var(--spacing-sm);
}

.method-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.method-card p, .method-card a {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.method-card a {
    display: block;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-form h3 {
    margin-bottom: var(--spacing-sm);
}

.form-group {
    width: 100%;
}

input, select, textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    font-family: var(--font-main);
    font-size: 1rem;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: all var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

::placeholder {
    color: #94a3b8;
}

/* ===== Gallery Section (Interactive Scroll) ===== */
.gallery {
    padding-bottom: var(--spacing-2xl);
    padding-top: var(--spacing-md);
    overflow: hidden;
}

.gallery-scroller {
    display: flex;
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    width: 100%;
    gap: var(--spacing-md);
    padding: 1rem 0; /* Spacing for the hover shadow to be visible */
}

.gallery-track {
    display: flex;
    flex-shrink: 0;
    justify-content: space-around;
    gap: var(--spacing-md);
    min-width: 100%;
    animation: scroll-gallery 25s linear infinite;
}

/* Pause scroll when hovering over the gallery */
.gallery-scroller:hover .gallery-track {
    animation-play-state: paused;
}

.gallery-item {
    width: 280px;
    height: 220px;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
    cursor: pointer;
}

@media (min-width: 768px) {
    .gallery-item {
        width: 380px;
        height: 280px;
    }
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

@keyframes scroll-gallery {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(calc(-100% - var(--spacing-md)));
    }
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-primary-darker);
    color: #cbd5e1; /* Slate 300 */
    padding-top: var(--spacing-2xl);
}

.footer-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .footer-container {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand p {
    max-width: 400px;
}

.footer h3 {
    color: #ffffff;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.footer ul {
    list-style: none;
}

.footer li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer a {
    color: #cbd5e1;
}

.footer a:hover {
    color: var(--color-accent);
    padding-left: 5px;
}

.footer i {
    color: var(--color-accent);
}

.footer-bottom {
    background-color: #020617; /* Slate 950 */
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 0.875rem;
}

/* ===== Animations ===== */
.reveal {
    opacity: 0;
    transition: all var(--transition-slow);
}

.reveal.active {
    opacity: 1;
    transform: translate(0, 0);
}

.reveal-up {
    transform: translateY(50px);
}

.reveal-left {
    transform: translateX(-50px);
}

.reveal-right {
    transform: translateX(50px);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Responsive adjustments for specific elements */
@media (max-width: 1024px) {
    .floating-contact {
        position: static;
        transform: none;
        margin-top: var(--spacing-xl);
        width: 100%;
    }
    .hero {
        padding-bottom: var(--spacing-2xl);
    }
}

@media (max-width: 900px) {
    .fc-divider {
        display: none;
    }
    .floating-contact {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--color-bg);
        flex-direction: column;
        justify-content: center;
        transition: left var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .nav-link {
        font-size: 1.25rem;
    }
    
    .nav-cta {
        display: none; /* Hide CTA on mobile nav bar to save space */
    }
    
    .experience-badge {
        right: 0;
        bottom: 0;
        border-radius: 0;
        width: 100%;
    }
}

/* ===== WhatsApp Floating Button ===== */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 35px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.3);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    animation: bounce-pulse 2s infinite;
}

.whatsapp-float:hover {
    background-color: #128c7e;
    color: #fff;
    transform: scale(1.1);
}

@keyframes bounce-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.6);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
        transform: scale(1.05);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
        transform: scale(1);
    }
}

@media (max-width: 768px) {
    .whatsapp-float {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 30px;
    }
}