/* ==========================================================================
   Ruang & Rasa Studio — Style Sheet
   Theme: Warm Minimalism × Editorial Architecture
   ========================================================================== */

:root {
    /* Color Palette */
    --color-bg: #F4F0E8;
    --color-surface: #E9E2D6;
    --color-surface-hover: #DFD6C7;
    --color-sand: #D5C8B5;
    --color-taupe: #A79B8C;
    --color-dark: #292621;
    --color-charcoal: #38342F;
    --color-muted: #756E65;
    --color-accent-warm: #8C5E3C;
    --color-white: #FFFFFF;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* Spacing System */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --space-xxl: 9rem;
    
    /* Container */
    --content-width: 1240px;
    
    /* Typography */
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.25, 1, 0.5, 1);
    --transition-medium: 400ms cubic-bezier(0.25, 1, 0.5, 1);
    --transition-slow: 700ms cubic-bezier(0.25, 1, 0.5, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--color-bg);
    color: var(--color-dark);
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.65;
    color: var(--color-charcoal);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    border: none;
    outline: none;
    background: none;
}

button {
    cursor: pointer;
}

/* Accessibility & SEO Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-accent-warm);
    outline-offset: 3px;
}

/* SEO Screen Reader Only Utility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

ul {
    list-style: none;
}

/* Global Container */
.container {
    width: min(100% - 2.5rem, var(--content-width));
    margin-inline: auto;
}

.section-padding {
    padding-block: clamp(4rem, 8vw, var(--space-xl));
}

/* Typography Utility */
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-taupe);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 400;
    line-height: 1.15;
    color: var(--color-dark);
}

.section-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--color-muted);
    max-width: 32ch;
    font-weight: 300;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.9rem 1.8rem;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    border-radius: var(--radius-sm);
    transition: all var(--transition-medium);
}

.btn-primary {
    background-color: var(--color-dark);
    color: var(--color-bg);
}

.btn-primary:hover {
    background-color: #3f3b34;
    transform: translateY(-2px);
}

.btn-outline {
    border: 1px solid var(--color-dark);
    color: var(--color-dark);
}

.btn-outline:hover {
    background-color: var(--color-dark);
    color: var(--color-bg);
}

.btn-ghost {
    color: var(--color-dark);
    padding-inline: 1rem;
}

.btn-ghost:hover {
    color: var(--color-accent-warm);
}

.btn-sm {
    padding: 0.6rem 1.2rem;
    font-size: 0.8125rem;
}

.btn-full {
    width: 100%;
}

.btn-icon {
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* Header & Nav */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding-block: 1.5rem;
    transition: background-color var(--transition-medium), padding var(--transition-medium), box-shadow var(--transition-medium);
}

.header.scrolled {
    background-color: rgba(244, 240, 232, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding-block: 1rem;
    box-shadow: 0 4px 20px rgba(41, 38, 33, 0.04);
}

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

.brand-logo {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: var(--color-dark);
    line-height: 1;
}

.brand-sub {
    font-size: 0.65rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-taupe);
    margin-top: 3px;
}

.nav-list {
    display: flex;
    gap: 2.2rem;
    align-items: center;
}

.nav-link {
    font-size: 0.875rem;
    color: var(--color-charcoal);
    letter-spacing: 0.02em;
    position: relative;
    padding-block: 0.25rem;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 1px;
    background-color: var(--color-dark);
    transition: width var(--transition-fast);
}

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    z-index: 102;
}

.hamburger-line {
    width: 24px;
    height: 1.5px;
    background-color: var(--color-dark);
    transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
    padding-top: clamp(8rem, 14vw, 12rem);
    padding-bottom: clamp(3rem, 6vw, 5rem);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}

.badge-label {
    font-size: 0.725rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    color: var(--color-taupe);
    margin-bottom: 1.2rem;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.8rem, 5.5vw, 4.8rem);
    font-weight: 300;
    line-height: 1.05;
    color: var(--color-dark);
    margin-bottom: 1.5rem;
}

.hero-title em {
    font-style: italic;
    font-weight: 400;
}

.hero-description {
    font-size: clamp(1rem, 1.2vw, 1.125rem);
    line-height: 1.7;
    color: var(--color-muted);
    max-width: 44ch;
    margin-bottom: 2.2rem;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    margin-bottom: 3.5rem;
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding-top: 1.8rem;
    border-top: 1px solid var(--color-sand);
}

.meta-item {
    display: flex;
    flex-direction: column;
}

.meta-number {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--color-taupe);
}

.meta-text {
    font-size: 0.75rem;
    color: var(--color-muted);
    line-height: 1.4;
}

.hero-media {
    position: relative;
}

.hero-image-wrapper {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4 / 5;
    box-shadow: 0 20px 40px rgba(41, 38, 33, 0.08);
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.hero-image-wrapper:hover .hero-img {
    transform: scale(1.03);
}

.hero-image-caption {
    position: absolute;
    bottom: 1.5rem;
    left: 1.5rem;
    right: 1.5rem;
    background: rgba(244, 240, 232, 0.9);
    backdrop-filter: blur(8px);
    padding: 1rem 1.2rem;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
}

.caption-tag {
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-taupe);
}

.caption-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-dark);
    margin-top: 2px;
}

/* Philosophy Section */
.philosophy {
    background-color: var(--color-surface);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 6vw, 5rem);
    align-items: center;
}

.philosophy-quote {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 300;
    line-height: 1.2;
    color: var(--color-dark);
    margin-bottom: 2rem;
}

.philosophy-body {
    font-size: 1rem;
    color: var(--color-muted);
    margin-bottom: 1.2rem;
    line-height: 1.7;
}

.image-frame {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4 / 3;
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.frame-badge {
    position: absolute;
    top: 1.2rem;
    right: 1.2rem;
    background-color: var(--color-dark);
    color: var(--color-bg);
    font-size: 0.725rem;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    letter-spacing: 0.05em;
}

/* Selected Projects */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2.5rem;
    gap: 2rem;
}

.project-filters {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.2rem;
    font-size: 0.8125rem;
    border-radius: 50px;
    border: 1px solid var(--color-sand);
    color: var(--color-muted);
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--color-dark);
    background-color: var(--color-dark);
    color: var(--color-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: clamp(1.5rem, 3vw, 3rem);
}

.project-card {
    cursor: pointer;
}

.project-large {
    grid-column: span 7;
}

.project-medium {
    grid-column: span 5;
}

.project-image-box {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 16 / 11;
    margin-bottom: 1.2rem;
}

.project-medium .project-image-box {
    aspect-ratio: 4 / 3;
}

.project-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image-box img {
    transform: scale(1.04);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(41, 38, 33, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.view-btn {
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    padding: 0.6rem 1.2rem;
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 50px;
    backdrop-filter: blur(4px);
}

.project-meta {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.4rem;
}

.project-num {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-taupe);
}

.project-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
}

.project-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--color-dark);
    margin-bottom: 0.5rem;
    transition: color var(--transition-fast);
}

.project-card:hover .project-title {
    color: var(--color-accent-warm);
}

.project-desc {
    font-size: 0.9rem;
    color: var(--color-muted);
    line-height: 1.6;
}

/* Approach / Process */
.approach {
    background-color: var(--color-surface);
}

.approach-header {
    max-width: 540px;
    margin-bottom: 4rem;
}

.approach-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.step-card {
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-sand);
}

.step-num {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    color: var(--color-taupe);
    margin-bottom: 1rem;
    line-height: 1;
}

.step-title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--color-dark);
    margin-bottom: 0.8rem;
}

.step-text {
    font-size: 0.875rem;
    color: var(--color-muted);
    line-height: 1.65;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.service-card {
    background-color: var(--color-surface);
    padding: clamp(2rem, 4vw, 3rem);
    border-radius: var(--radius-md);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 30px rgba(41, 38, 33, 0.05);
}

.service-no {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--color-taupe);
}

.service-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--color-dark);
    margin-block: 0.8rem 1rem;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--color-muted);
    margin-bottom: 1.8rem;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    border-top: 1px solid var(--color-sand);
    padding-top: 1.2rem;
}

.service-list li {
    font-size: 0.825rem;
    color: var(--color-charcoal);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.service-list li::before {
    content: '—';
    color: var(--color-taupe);
}

/* Materials Showcase */
.materials {
    background-color: var(--color-dark);
    color: var(--color-bg);
}

.materials .section-label {
    color: var(--color-taupe);
}

.materials-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: center;
}

.materials-title {
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 300;
    line-height: 1.15;
    color: var(--color-bg);
    margin-bottom: 1.5rem;
}

.materials-body {
    font-size: 1rem;
    color: var(--color-taupe);
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.material-pills {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mat-pill {
    padding: 1.2rem;
    border: 1px solid rgba(213, 200, 181, 0.15);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
}

.mat-pill strong {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--color-bg);
}

.mat-pill span {
    font-size: 0.8125rem;
    color: var(--color-taupe);
    margin-top: 2px;
}

.mat-pill:hover,
.mat-pill.active {
    background: rgba(233, 226, 214, 0.08);
    border-color: var(--color-sand);
}

.material-display-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4 / 5;
}

.material-display-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity var(--transition-medium);
}

.material-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(41, 38, 33, 0.95), transparent);
    padding: 2rem 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
}

#material-caption-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--color-bg);
}

#material-caption-desc {
    font-size: 0.8125rem;
    color: var(--color-taupe);
    margin-top: 4px;
}

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.testimonial-card {
    background-color: var(--color-surface);
    padding: clamp(2rem, 4vw, 3.5rem);
    border-radius: var(--radius-md);
    position: relative;
}

.quote-mark {
    font-family: var(--font-serif);
    font-size: 4rem;
    line-height: 1;
    color: var(--color-sand);
    margin-bottom: -1rem;
}

.testimonial-quote {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-style: italic;
    color: var(--color-dark);
    line-height: 1.5;
    margin-bottom: 2rem;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-dark);
}

.author-location {
    font-size: 0.8125rem;
    color: var(--color-muted);
}

/* About Studio Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: center;
}

.about-image-wrapper {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4 / 5;
}

.about-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-experience-badge {
    position: absolute;
    bottom: 1.5rem;
    left: 1.5rem;
    background-color: var(--color-bg);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
}

.exp-years {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--color-dark);
}

.exp-text {
    font-size: 0.75rem;
    color: var(--color-muted);
}

.about-title {
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 300;
    line-height: 1.15;
    color: var(--color-dark);
    margin-bottom: 1.8rem;
}

.about-paragraph {
    font-size: 1rem;
    color: var(--color-muted);
    line-height: 1.7;
    margin-bottom: 1.2rem;
}

.about-details {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    margin-top: 2rem;
    padding-top: 1.8rem;
    border-top: 1px solid var(--color-sand);
}

.detail-item {
    display: flex;
    flex-direction: column;
}

.detail-item strong {
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-dark);
}

.detail-item span {
    font-size: 0.95rem;
    color: var(--color-muted);
}

/* Contact Section */
.contact {
    background-color: var(--color-surface);
}

.contact-box {
    max-width: 1000px;
    margin-inline: auto;
}

.contact-header {
    text-align: center;
    max-width: 600px;
    margin-inline: auto;
    margin-bottom: 3.5rem;
}

.contact-title {
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 300;
    line-height: 1.15;
    color: var(--color-dark);
    margin-bottom: 1rem;
}

.contact-subtitle {
    font-size: 1rem;
    color: var(--color-muted);
}

.contact-body {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    background-color: var(--color-bg);
    padding: clamp(2rem, 4vw, 3.5rem);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(41, 38, 33, 0.03);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

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

.form-group label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-sand);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--color-dark);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-dark);
    background-color: var(--color-white);
}

.form-note {
    font-size: 0.75rem;
    color: var(--color-muted);
    text-align: center;
    margin-top: -0.5rem;
}

.contact-info-panel {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding-left: 2rem;
    border-left: 1px solid var(--color-sand);
}

.info-block {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.725rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-taupe);
    margin-bottom: 0.3rem;
}

.info-val {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--color-dark);
}

.info-val:hover {
    color: var(--color-accent-warm);
}

.info-val-text {
    font-size: 0.9rem;
    color: var(--color-muted);
    line-height: 1.5;
}

/* Footer */
.footer {
    background-color: var(--color-dark);
    color: var(--color-bg);
    padding-top: 5rem;
    padding-bottom: 3rem;
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    padding-bottom: 4rem;
    border-bottom: 1px solid rgba(213, 200, 181, 0.15);
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    letter-spacing: 0.12em;
    color: var(--color-bg);
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--color-taupe);
    max-width: 30ch;
    margin-top: 1rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.col-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-taupe);
    margin-bottom: 1.2rem;
    display: block;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.footer-col a {
    font-size: 0.875rem;
    color: var(--color-sand);
}

.footer-col a:hover {
    color: var(--color-bg);
}

.footer-loc {
    font-size: 0.875rem;
    color: var(--color-sand);
    line-height: 1.6;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    font-size: 0.8125rem;
    color: var(--color-taupe);
}

/* Modal Dialog */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

.modal.is-open {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(41, 38, 33, 0.6);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    z-index: 201;
    background-color: var(--color-bg);
    width: min(100%, 850px);
    max-height: 90vh;
    overflow-y: auto;
    border-radius: var(--radius-md);
    padding: clamp(1.8rem, 4vw, 3rem);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    transform: translateY(20px);
    transition: transform var(--transition-medium);
}

.modal.is-open .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 1.2rem;
    right: 1.5rem;
    font-size: 2rem;
    line-height: 1;
    color: var(--color-muted);
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-dark);
}

.modal-project-img {
    width: 100%;
    border-radius: var(--radius-sm);
    aspect-ratio: 16 / 9;
    object-fit: cover;
    margin-bottom: 1.5rem;
}

.modal-project-title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    color: var(--color-dark);
    margin-bottom: 0.4rem;
}

.modal-project-tag {
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-taupe);
    margin-bottom: 1.2rem;
    display: block;
}

.modal-project-desc {
    font-size: 1rem;
    color: var(--color-muted);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.modal-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-sand);
}

.feature-item {
    display: flex;
    flex-direction: column;
}

.feature-label {
    font-size: 0.725rem;
    text-transform: uppercase;
    color: var(--color-taupe);
}

.feature-val {
    font-size: 0.9rem;
    color: var(--color-dark);
    font-weight: 500;
}

/* Scroll Reveal Animation Styles */
.reveal-element {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 800ms cubic-bezier(0.25, 1, 0.5, 1),
                transform 800ms cubic-bezier(0.25, 1, 0.5, 1);
    will-change: opacity, transform;
}

.reveal-element.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

/* SEO & Core Web Vitals Optimization: Content Visibility for Rendering Performance */
.philosophy,
.projects,
.approach,
.services,
.materials,
.testimonials,
.about,
.contact,
.footer {
    content-visibility: auto;
    contain-intrinsic-size: 1px 600px;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
    }
    
    .hero-media {
        order: -1;
    }
    
    .hero-image-wrapper {
        aspect-ratio: 16 / 9;
    }
    
    .philosophy-grid,
    .materials-container,
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .approach-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-body {
        grid-template-columns: 1fr;
    }
    
    .contact-info-panel {
        padding-left: 0;
        border-left: none;
        border-top: 1px solid var(--color-sand);
        padding-top: 2rem;
    }
}

@media (max-width: 768px) {
    .desktop-only-btn {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        inset: 0;
        background-color: var(--color-bg);
        z-index: 101;
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding: 3rem 2rem;
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-medium), visibility var(--transition-medium);
    }
    
    .nav-menu.is-active {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.8rem;
        margin-bottom: 3rem;
    }
    
    .nav-link {
        font-family: var(--font-serif);
        font-size: 2rem;
    }
    
    .nav-mobile-cta {
        display: block;
        width: 100%;
    }
    
    /* Mobile Nav Toggle Active State */
    .nav-toggle.is-active .hamburger-line:nth-child(1) {
        transform: translateY(3.25px) rotate(45deg);
    }
    
    .nav-toggle.is-active .hamburger-line:nth-child(2) {
        transform: translateY(-3.25px) rotate(-45deg);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-large,
    .project-medium {
        grid-column: span 1;
    }
    
    .services-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 0.8rem;
        text-align: center;
    }
    
    .modal-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-meta {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    
    .approach-steps {
        grid-template-columns: 1fr;
    }
    
    .form-group-row {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Reduced Motion Accessibility
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .reveal-element {
        opacity: 1;
        transform: none;
    }
}

/* ==========================================================================
   Print Stylesheet Optimization for Crawlers & Print Media
   ========================================================================== */
@media print {
    .header,
    .nav-toggle,
    .btn,
    .modal,
    .project-filters {
        display: none !important;
    }
    
    body {
        background-color: #ffffff !important;
        color: #000000 !important;
    }
    
    .container {
        width: 100% !important;
        padding: 0 !important;
    }
}