/* ==========================================================================
   Contruzzo Premium Visual Identity & Stylesheet
   Design Language: Minimalist, High-end, Modern Architectural Focus
   Palette: Deep Navy Blue, Solid Grey, Crisp White, Light Slate
   ========================================================================== */

/* --- Design System Variables --- */
:root {
    /* Color Palette */
    --color-navy-darker: #07111E;     /* Deep dark navy, near black, for ultimate premium feel */
    --color-navy-dark: #0F1E32;       /* Rich Deep Navy Blue */
    --color-navy-medium: #1E314B;     /* Slate Navy for secondary highlights */
    --color-grey-solid: #4A5768;      /* Solid Grey for body text */
    --color-grey-light: #7E8E9F;      /* Steel Grey for subtitles and captions */
    --color-slate-50: #F8FAFC;        /* Architectural off-white */
    --color-slate-100: #F1F5F9;       /* Light cool grey background */
    --color-white: #FFFFFF;           
    --color-border: #E2E8F0;          /* Thin modern divider color */
    --color-border-hover: #CBD5E1;
    --color-accent-blue: #38BDF8;     /* Tech accent */
    
    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Shadows (Subtle, high-end blur) */
    --shadow-sm: 0 2px 8px -1px rgba(15, 30, 50, 0.04);
    --shadow-md: 0 12px 30px -10px rgba(15, 30, 50, 0.08);
    --shadow-lg: 0 20px 40px -15px rgba(7, 17, 30, 0.12);

    /* Animation Constants */
    --transition-fast: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-normal: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Layout */
    --border-radius-sm: 2px;          /* Minimalist, architectural sharp corners */
    --border-radius-md: 4px;
    --container-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Offset for sticky nav */
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-grey-solid);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    color: var(--color-navy-dark);
    font-weight: 500; /* Cleaner look for headings */
    letter-spacing: -0.02em;
}

h1 {
    font-weight: 700;
}

p {
    font-weight: 400;
}

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

button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
    outline: none;
    transition: var(--transition-fast);
}

/* Custom Scrollbar for premium browsers */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-slate-50);
}
::-webkit-scrollbar-thumb {
    background: var(--color-navy-medium);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-navy-dark);
}

/* --- Reusable Components & Layout Utility --- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 32px;
}

/* Premium Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-normal);
}

.btn-primary {
    background-color: var(--color-navy-dark);
    color: var(--color-white);
    border: 1px solid var(--color-navy-dark);
}

.btn-primary:hover {
    background-color: var(--color-navy-darker);
    border-color: var(--color-navy-darker);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-navy-dark);
    border: 1px solid var(--color-navy-dark);
}

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

.btn-block {
    display: flex;
    width: 100%;
}

/* Section Header Typography */
.section-header {
    margin-bottom: 64px;
    max-width: 680px;
}

.section-pretitle {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--color-grey-light);
    text-transform: uppercase;
    display: block;
    margin-bottom: 12px;
    position: relative;
    padding-left: 20px;
}

.section-pretitle::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 1px;
    background-color: var(--color-grey-light);
}

.section-title {
    font-size: 40px;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--color-navy-dark);
}

.section-description {
    font-size: 17px;
    color: var(--color-grey-solid);
    line-height: 1.6;
}

/* --- Sticky Modern Navigation --- */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    z-index: 1000;
    transition: var(--transition-normal);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px;
}

.brand-logo {
    height: 75px;
    width: auto;
    transition: var(--transition-normal);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-link {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-navy-dark);
    padding: 8px 0;
    position: relative;
    opacity: 0.85;
}

.nav-link.active, .nav-link:hover {
    opacity: 1;
    color: var(--color-navy-darker);
}

/* Premium Minimalist Line Underlink */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background-color: var(--color-navy-dark);
    transition: var(--transition-normal);
    transform: translateX(-50%);
}

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

.nav-link.nav-btn {
    background-color: var(--color-navy-dark);
    color: var(--color-white);
    padding: 10px 24px;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    opacity: 1;
}

.nav-link.nav-btn:hover {
    background-color: var(--color-navy-darker);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.nav-link.nav-btn::after {
    display: none;
}

.nav-toggle {
    display: none;
}

/* --- Hero Section (Aesthetic, clean negative space) --- */
.hero-section {
    padding-top: 200px;
    padding-bottom: 140px;
    background: radial-gradient(circle at 80% 30%, rgba(241, 245, 249, 0.8) 0%, rgba(255, 255, 255, 1) 70%);
    position: relative;
    overflow: hidden;
}

/* Geometric details in background to look designed */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    background-color: var(--color-slate-50);
    z-index: 0;
    clip-path: polygon(25% 0%, 100% 0%, 100% 100%, 0% 100%);
    opacity: 0.5;
}

.hero-container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
}

.hero-pretitle {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.25em;
    color: var(--color-grey-light);
    text-transform: uppercase;
    display: block;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 58px;
    line-height: 1.15;
    margin-bottom: 28px;
    color: var(--color-navy-darker);
}

.hero-subtitle {
    font-size: 20px;
    color: var(--color-grey-solid);
    margin-bottom: 48px;
    max-width: 680px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 20px;
}

/* --- Why Contruzzo Section (Pillars Grid) --- */
.why-section {
    padding: var(--section-padding);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-white);
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.pillar-card {
    padding: 48px;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-slow);
    position: relative;
}

.pillar-card::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    width: calc(100% + 2px);
    height: 0px;
    background-color: var(--color-navy-dark);
    transition: var(--transition-normal);
}

.pillar-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-navy-dark);
    box-shadow: var(--shadow-md);
}

.pillar-card:hover::before {
    height: 4px;
}

.pillar-icon {
    width: 56px;
    height: 56px;
    background-color: var(--color-slate-100);
    color: var(--color-navy-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
    transition: var(--transition-normal);
}

.pillar-card:hover .pillar-icon {
    background-color: var(--color-navy-dark);
    color: var(--color-white);
}

.pillar-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--color-navy-dark);
}

.pillar-text {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-grey-solid);
}

/* --- Services Accordion Section --- */
.services-section {
    padding: var(--section-padding);
    background-color: var(--color-slate-50);
    border-bottom: 1px solid var(--color-border);
}

.accordions-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
}

.accordion-item {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-normal);
}

.accordion-item:hover {
    border-color: var(--color-border-hover);
}

.accordion-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 40px;
    background: none;
    text-align: left;
}

.accordion-title-wrapper {
    display: flex;
    align-items: center;
    gap: 32px;
}

.accordion-num {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    color: var(--color-grey-light);
    letter-spacing: 0.1em;
}

.accordion-title-text {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 600;
    color: var(--color-navy-dark);
}

.accordion-icon-box {
    color: var(--color-navy-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    transition: var(--transition-normal);
}

.accordion-header:hover .accordion-icon-box {
    background-color: var(--color-navy-dark);
    color: var(--color-white);
    border-color: var(--color-navy-dark);
}

/* Collapsible Panel */
.accordion-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.accordion-content {
    padding: 0 40px 48px 108px;
}

.service-intro-text {
    font-size: 16px;
    color: var(--color-grey-solid);
    margin-bottom: 32px;
    line-height: 1.7;
}

.tech-expandable-section {
    padding-top: 32px;
    border-top: 1px solid var(--color-slate-100);
}

.tech-section-title {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 24px;
    color: var(--color-grey-light);
}

.tech-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.tech-list li {
    font-size: 15px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    position: relative;
    padding-left: 24px;
}

.tech-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 8px;
    height: 1px;
    background-color: var(--color-navy-medium);
}

.tech-list li strong {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 16px;
    color: var(--color-navy-dark);
}

.tech-list li span {
    color: var(--color-grey-solid);
}

/* Opened Accordion Active States */
.accordion-item.open {
    border-color: var(--color-navy-dark);
    box-shadow: var(--shadow-md);
}

.accordion-item.open .accordion-icon-box {
    background-color: var(--color-navy-dark);
    color: var(--color-white);
    border-color: var(--color-navy-dark);
    transform: rotate(180deg);
}

/* --- Portfolio Grid Section --- */
.portfolio-section {
    padding: var(--section-padding);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-white);
}

.portfolio-filters {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 8px 24px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-grey-solid);
}

.filter-btn:hover {
    border-color: var(--color-navy-dark);
    color: var(--color-navy-dark);
}

.filter-btn.active {
    background-color: var(--color-navy-dark);
    color: var(--color-white);
    border-color: var(--color-navy-dark);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.portfolio-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition-slow);
}

.portfolio-card.hide {
    display: none;
}

/* --- Portfolio Carousel Styles --- */
.portfolio-carousel {
    position: relative;
    width: 100%;
    aspect-ratio: 1.5; /* Premium architectural photo ratio */
    background-color: var(--color-slate-100);
    overflow: hidden;
}

.carousel-track-container {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    flex-wrap: nowrap;
    width: 100%;
    height: 100%;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

.carousel-slide {
    flex: 0 0 100%;
    width: 100%;
    height: 100%;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-card:hover .carousel-slide img {
    transform: scale(1.06);
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(7, 17, 30, 0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 300;
    z-index: 10;
    opacity: 0;
    transition: var(--transition-normal);
    user-select: none;
}

.portfolio-carousel:hover .carousel-btn {
    opacity: 1;
}

.carousel-btn-prev {
    left: 12px;
}

.carousel-btn-next {
    right: 12px;
}

.carousel-btn:hover {
    background-color: rgba(7, 17, 30, 0.85);
}

.carousel-indicators {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
    padding: 4px 8px;
    background-color: rgba(7, 17, 30, 0.25);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 10px;
}

.carousel-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition-fast);
}

.carousel-dot.active {
    background-color: var(--color-white);
    transform: scale(1.25);
}

.portfolio-img-overlay {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 5;
}

/* Make carousel controls visible on hover and on touch devices by default */
@media (hover: none) {
    .carousel-btn {
        opacity: 0.8;
    }
}

/* --- Tech Details Toggle Styles --- */
.tech-details-toggle {
    margin-top: 24px;
}

.btn-tech-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-navy-dark);
    padding: 6px 0;
    border-bottom: 1px solid transparent;
    transition: var(--transition-fast);
}

.btn-tech-toggle:hover {
    color: var(--color-navy-medium);
    border-color: var(--color-navy-medium);
}

.btn-tech-toggle .chevron-mini {
    transition: transform var(--transition-normal);
}

.btn-tech-toggle[aria-expanded="true"] .chevron-mini {
    transform: rotate(180deg);
}

.tech-details-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.tech-details-toggle.open .tech-details-content {
    margin-top: 16px;
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
}

.placeholder-tag {
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 6px 14px;
    background-color: rgba(7, 17, 30, 0.8);
    backdrop-filter: blur(4px);
    color: var(--color-white);
    border-radius: var(--border-radius-sm);
}

.portfolio-card-content {
    padding: 32px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    border-top: 1px solid var(--color-slate-50);
}

.portfolio-project-title {
    font-size: 20px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.portfolio-project-desc {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-grey-solid);
}

.badge-dev {
    font-family: var(--font-display);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background-color: rgba(30, 49, 75, 0.08);
    color: var(--color-navy-dark);
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
}

.portfolio-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-navy-dark);
}

/* --- Contact & Lead Form Section (High Contrast dark mode) --- */
.contact-section {
    padding: var(--section-padding);
    background-color: var(--color-navy-darker);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

/* Architectural aesthetic line element */
.contact-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 45%;
    width: 1px;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.05);
    z-index: 0;
}

.contact-container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
}

.contact-info {
    max-width: 480px;
}

.contact-info .section-title {
    color: var(--color-white);
}

.contact-intro {
    font-size: 16px;
    color: var(--color-grey-light);
    margin-bottom: 48px;
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-icon {
    color: var(--color-grey-light);
    stroke-width: 1.5px;
}

.contact-text {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 500;
    color: var(--color-white);
    letter-spacing: 0.02em;
}

/* Clean White Form Card */
.contact-form-wrapper {
    background-color: var(--color-white);
    padding: 56px;
    border-radius: var(--border-radius-sm);
    color: var(--color-grey-solid);
    box-shadow: var(--shadow-lg);
}

.form-title {
    font-size: 26px;
    margin-bottom: 32px;
    color: var(--color-navy-dark);
}

.form-group {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-label {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-navy-dark);
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    font-family: var(--font-body);
    font-size: 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-navy-dark);
    background-color: var(--color-white);
    transition: var(--transition-fast);
}

.form-control::placeholder {
    color: var(--color-grey-light);
    opacity: 0.8;
}

.form-control:focus {
    border-color: var(--color-navy-dark);
    outline: none;
    box-shadow: 0 0 0 3px rgba(15, 30, 50, 0.05);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg fill='none' height='24' stroke='%230F1E32' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><polyline points='6 9 12 15 18 9'/></svg>");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 48px;
}

.form-alert {
    margin-top: 24px;
    padding: 20px;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    line-height: 1.6;
}

.success-alert {
    background-color: rgba(56, 161, 105, 0.05);
    color: var(--color-success);
    border: 1px solid rgba(56, 161, 105, 0.15);
}

/* --- Footer Section --- */
.main-footer {
    padding: 80px 32px;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-logo {
    height: 42px;
    width: auto;
    align-self: flex-start;
}

.footer-tagline {
    font-family: var(--font-display);
    font-size: 14px;
    color: var(--color-grey-light);
    letter-spacing: 0.02em;
}

.footer-meta {
    padding-top: 32px;
    border-top: 1px solid var(--color-slate-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--color-grey-light);
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a:hover {
    color: var(--color-navy-dark);
}


/* ==========================================================================
   Responsive Architecture & Media Queries
   ========================================================================== */

@media (max-width: 1024px) {
    .container {
        padding: 0 40px;
    }

    .hero-title {
        font-size: 48px;
    }

    .portfolio-grid {
        gap: 24px;
    }

    .contact-container {
        gap: 40px;
    }
}

@media (max-width: 900px) {
    :root {
        --section-padding: 80px 24px;
    }
    
    .pillars-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 56px;
    }

    .contact-section::after {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 64px 20px;
    }

    .container {
        padding: 0 20px;
    }

    .header-container {
        height: 80px;
    }

    .brand-logo {
        height: 60px;
    }

    /* Mobile Hamburger Trigger */
    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        border: 1px solid var(--color-border);
        border-radius: var(--border-radius-sm);
        z-index: 1100;
    }

    .hamburger {
        display: block;
        width: 20px;
        height: 2px;
        background-color: var(--color-navy-dark);
        position: relative;
        transition: background-color 0.2s ease;
    }

    .hamburger::before, .hamburger::after {
        content: '';
        position: absolute;
        width: 20px;
        height: 2px;
        background-color: var(--color-navy-dark);
        transition: transform 0.2s ease, top 0.2s ease;
    }

    .hamburger::before {
        top: -6px;
    }

    .hamburger::after {
        top: 6px;
    }

    /* Activated Hamburger Transform */
    .nav-toggle[aria-expanded="true"] .hamburger {
        background-color: transparent;
    }

    .nav-toggle[aria-expanded="true"] .hamburger::before {
        top: 0;
        transform: rotate(45deg);
    }

    .nav-toggle[aria-expanded="true"] .hamburger::after {
        top: 0;
        transform: rotate(-45deg);
    }

    /* Draw-in Drawer Menu */
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: var(--color-white);
        box-shadow: -10px 0 40px rgba(7, 17, 30, 0.08);
        padding: 120px 40px 40px 40px;
        transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        display: block;
    }

    .main-nav[aria-hidden="false"] {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 32px;
    }

    .nav-link {
        font-size: 16px;
        width: 100%;
        padding: 12px 0;
    }

    .nav-link.nav-btn {
        display: block;
        text-align: center;
        margin-top: 24px;
        padding: 14px;
    }

    /* Hero layout scaling */
    .hero-section {
        padding-top: 150px;
        padding-bottom: 80px;
    }

    .hero-title {
        font-size: 38px;
    }

    .hero-subtitle {
        font-size: 17px;
        margin-bottom: 36px;
    }

    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
    }

    /* Accordion adjustment */
    .accordion-header {
        padding: 24px 20px;
    }

    .accordion-title-wrapper {
        gap: 20px;
    }

    .accordion-title-text {
        font-size: 18px;
    }

    .accordion-content {
        padding: 0 20px 24px 20px;
    }

    .tech-list {
        grid-template-columns: 1fr;
    }

    /* Portfolio filter buttons wrapping */
    .portfolio-filters {
        flex-wrap: wrap;
        gap: 8px;
    }

    .filter-btn {
        width: calc(50% - 4px);
        text-align: center;
        padding: 10px 0;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    /* Contact form styling */
    .contact-form-wrapper {
        padding: 32px 24px;
    }

    .form-group-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    /* Footer meta alignment */
    .footer-meta {
        flex-direction: column;
        gap: 24px;
        align-items: flex-start;
    }
}