/* ==========================================================================
   Design Tokens & Variables
   ========================================================================== */
:root {
    /* Colors (White-Ash Palette) */
    --color-bg: #FFFFFF;
    --color-surface: #F4F4F2;
    --color-surface-alt: #E7E7E4;
    --color-ink: #161616;
    --color-ink-muted: #5B5B58;
    --color-accent: #0F62FE; /* Chosen Blue Accent */
    --color-accent-ink: #FFFFFF;
    --color-dark-section: #161616;
    --color-success: #1E7A46;
    --color-error: #C8102E;

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Spacing & Layout */
    --max-width: 1200px;
    --header-height: 100px;
    --radius-sm: 8px;
    --radius-md: 12px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px; /* Base 16px for rem scaling */
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-ink);
}

p {
    color: var(--color-ink-muted);
}

a {
    text-decoration: none;
    color: var(--color-ink);
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

@media (min-width: 1024px) {
    .container {
        padding: 0 64px;
    }
}

.section-padding {
    padding: 56px 0;
}

@media (min-width: 768px) {
    .section-padding {
        padding: 96px 0;
    }
}

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

.dark-section {
    background-color: var(--color-dark-section);
    color: #FFFFFF;
}
.dark-section h1, .dark-section h2, .dark-section h3, .dark-section h4, .dark-section p {
    color: #FFFFFF;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 26px;
    margin-bottom: 12px;
}
@media (min-width: 768px) {
    .section-header h2 {
        font-size: 36px;
    }
}

/* ==========================================================================
   Components: Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-accent-ink);
}
.btn-primary:hover {
    background-color: #0d54d9; /* slightly darker blue */
    color: var(--color-accent-ink);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-ink);
    border: 1px solid var(--color-ink);
}
.btn-outline:hover {
    background-color: var(--color-ink);
    color: var(--color-bg);
}

.btn-full {
    width: 100%;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--color-bg);
    z-index: 100;
    transition: background-color 0.3s, border-bottom 0.3s;
}

.header.scrolled {
    border-bottom: 1px solid var(--color-surface-alt);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo-img {
    height: 80px;
}

.nav-menu {
    display: none; /* hidden on mobile */
    align-items: center;
    gap: 32px;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-link {
    font-weight: 500;
}
.nav-link:hover {
    color: var(--color-accent);
}

.mobile-menu-btn {
    display: block;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--color-ink);
    cursor: pointer;
}

@media (min-width: 1024px) {
    .mobile-menu-btn {
        display: none;
    }
    .nav-menu {
        display: flex;
    }
}

/* Mobile Overlay Menu */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-dark-section);
    z-index: 200;
    display: flex;
    flex-direction: column;
    padding: 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
}

.mobile-menu-overlay.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
}

.mobile-menu-close {
    background: none;
    border: none;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: auto;
}

.mobile-nav-link {
    color: #fff;
    font-size: 24px;
    font-family: var(--font-heading);
    font-weight: 600;
}

.mobile-menu-footer {
    padding-bottom: 48px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    padding-top: calc(var(--header-height) + 40px);
    padding-bottom: 56px;
}

.hero-container {
    display: -ms-grid;
    display: grid;
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
    gap: 40px;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
}

@media (min-width: 768px) {
    .hero {
        padding-top: calc(var(--header-height) + 80px);
        padding-bottom: 96px;
    }
    .hero-container {
        -ms-grid-columns: 1fr 40px 1fr;
        grid-template-columns: 1fr 1fr;
    }
}

.hero-eyebrow {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--color-ink-muted);
    margin-bottom: 16px;
}

.hero-title {
    font-size: 34px;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 16px;
    margin-bottom: 32px;
    max-width: 480px;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 56px;
    }
    .hero-subtitle {
        font-size: 18px;
    }
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

@media (min-width: 480px) {
    .hero-actions {
        flex-direction: row;
    }
}

.hero-visual {
    width: 100%;
}

.hero-image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: var(--color-surface-alt);
    border: 1px dashed #ccc;
}

/* ==========================================================================
   Trust Bar
   ========================================================================== */
.trust-bar {
    background-color: var(--color-surface-alt);
    padding: 32px 0;
}

.trust-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    row-gap: 16px;
}

@media (min-width: 768px) {
    .trust-container {
        justify-content: space-between;
    }
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink);
}

.trust-item i {
    font-size: 20px;
    color: var(--color-accent);
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

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

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.service-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-surface-alt);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.service-icon {
    font-size: 40px;
    color: var(--color-accent);
    margin-bottom: 24px;
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 15px;
    margin-bottom: 24px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-weight: 500;
    font-size: 14px;
    color: var(--color-accent);
}
.service-link:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Why Choose Us
   ========================================================================== */
.benefits-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

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

@media (min-width: 1024px) {
    .benefits-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.benefit-item i {
    font-size: 32px;
    color: var(--color-ink);
    margin-bottom: 16px;
}

.benefit-item h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.benefit-item p {
    font-size: 15px;
}

/* ==========================================================================
   Featured Projects
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

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

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

.project-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-surface-alt);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.project-img-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background-color: var(--color-surface);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--color-ink-muted);
}
.project-img-placeholder i {
    font-size: 32px;
}

.project-info {
    padding: 24px;
}

.project-tag {
    display: inline-block;
    background-color: var(--color-surface);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.project-info h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.project-info p {
    font-size: 15px;
    margin-bottom: 0;
}

/* ==========================================================================
   CTA Band
   ========================================================================== */
.cta-container {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.cta-logo {
    height: 80px;
    margin-bottom: 24px;
}

.cta-title {
    font-size: 26px;
    margin-bottom: 32px;
}

@media (min-width: 768px) {
    .cta-title {
        font-size: 36px;
    }
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
}

@media (min-width: 768px) {
    .contact-container {
        grid-template-columns: 1fr 1fr;
        gap: 64px;
    }
}

.contact-info-panel h2 {
    font-size: 32px;
    margin-bottom: 16px;
}

.contact-info-panel p {
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-detail-item {
    display: flex;
    gap: 16px;
}

.contact-detail-item i {
    font-size: 28px;
    color: var(--color-accent);
}

.contact-detail-item strong {
    display: block;
    margin-bottom: 4px;
    color: var(--color-ink);
}

.contact-detail-item a {
    color: var(--color-ink-muted);
}
.contact-detail-item a:hover {
    color: var(--color-accent);
}

.contact-form {
    background-color: var(--color-bg);
    padding: 32px;
    border: 1px solid var(--color-surface-alt);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-surface-alt);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 16px;
    background-color: var(--color-surface);
    transition: border-color 0.2s, background-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background-color: var(--color-bg);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding-top: 64px;
    padding-bottom: 32px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

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

.footer-logo {
    height: 64px;
    margin-bottom: 16px;
}

.footer-tagline {
    font-size: 14px;
    opacity: 0.8;
}

.footer h4 {
    margin-bottom: 16px;
    font-size: 16px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a, .footer-link {
    color: #FFFFFF;
    opacity: 0.8;
    font-size: 14px;
    transition: opacity 0.2s;
}

.footer-links a:hover, .footer-link:hover {
    opacity: 1;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 14px;
    opacity: 0.6;
}

/* ==========================================================================
   Floating WhatsApp Button
   ========================================================================== */
.floating-wa-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background-color: var(--color-success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    z-index: 150;
    transition: transform 0.2s;
}

.floating-wa-btn:hover {
    transform: scale(1.05);
}

@media (min-width: 768px) {
    .floating-wa-btn {
        display: none; /* Hide on desktop as header CTA is always visible */
    }
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: white;
    border: 1px solid var(--color-surface-alt);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.faq-item:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.07);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    cursor: pointer;
    text-align: left;
    gap: 16px;
    transition: background 0.2s;
}

.faq-question:hover {
    background: var(--color-surface);
}

.faq-question i {
    flex-shrink: 0;
    font-size: 20px;
    color: var(--color-accent);
    transition: transform 0.3s ease;
}

.faq-question.open i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.2s;
    padding: 0 24px;
}

.faq-answer.open {
    max-height: 300px;
    padding: 0 24px 20px;
}

.faq-answer p {
    color: var(--color-ink-muted);
    line-height: 1.7;
    font-size: 15px;
}

.faq-answer a {
    color: var(--color-accent);
    text-decoration: none;
}

.faq-answer a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Project Filter Tabs & Sliding Grid
   ========================================================================== */
.project-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.project-tab {
    background: var(--color-surface);
    border: 1px solid var(--color-surface-alt);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--color-ink-muted);
}

.project-tab:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.project-tab.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Make grid horizontally scrollable on mobile, standard grid on desktop */
.projects-slider-container {
    width: 100%;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 16px;
    scrollbar-width: thin;
    scrollbar-color: var(--color-surface-alt) transparent;
}

.projects-slider-container::-webkit-scrollbar {
    height: 6px;
}
.projects-slider-container::-webkit-scrollbar-track {
    background: transparent;
}
.projects-slider-container::-webkit-scrollbar-thumb {
    background: var(--color-surface-alt);
    border-radius: 10px;
}

.projects-grid {
    display: flex; /* Changed from grid to flex for sliding */
    gap: 24px;
    width: max-content; /* Ensure it grows horizontally */
}

.project-card {
    scroll-snap-align: start;
    width: 300px; /* Fixed width for sliding cards */
    flex-shrink: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Show/hide class for filtering */
.project-card.hide {
    display: none;
}

@media (min-width: 768px) {
    .projects-slider-container {
        overflow-x: visible;
        scroll-snap-type: none;
        padding-bottom: 0;
    }
    .projects-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        width: 100%;
    }
    .project-card {
        width: auto;
    }
}

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

/* ==========================================================================
   Hero Slider & Custom Adjustments
   ========================================================================== */
.hero-slider {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 fallback for Edge */
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0,0,0,0.1);
}

@supports (aspect-ratio: 16/9) {
    .hero-slider {
        padding-bottom: 0;
        aspect-ratio: 16/9;
    }
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    border-radius: 12px;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

/* Logo Size Increase */
.logo-img, .footer-logo, .cta-logo {
    max-height: 56px;
    width: auto;
}

/* FAQ & Reviews 2-Column Grid */
.faq-reviews-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

@media (min-width: 992px) {
    .faq-reviews-grid {
        grid-template-columns: 3fr 2fr;
        align-items: stretch;
    }
}