/* ==========================================================================
   RAVINDRAN INDUSTRIES - Core Design System & Stylesheet
   Pure Vanilla CSS3 - Standard Static Architecture
   ========================================================================== */

:root {
    /* Color Palette */
    --paper: #FAFAF7;
    --paper-deep: #F2F0E9;
    --ink: #1B1B18;
    --ink-soft: #4A4A44;
    --steel: #8C8D82;
    --patina: #4B5E4F;
    --patina-deep: #374a3b;
    --patina-dark: #1c2e21;
    --line: #DCD9CE;
    --white: #FFFFFF;
    --amber: #E5A93C;

    /* Semantic Theme Tokens */
    --background: var(--paper);
    --foreground: var(--ink);
    --primary: var(--ink);
    --primary-foreground: var(--paper);
    --secondary: var(--paper-deep);
    --secondary-foreground: var(--ink-soft);
    --muted: var(--steel);
    --muted-foreground: var(--ink-soft);
    --accent: var(--patina);
    --accent-foreground: var(--white);
    --border: var(--line);

    /* Architectural Typography */
    --display: 'Syne', 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --heading-small: 'Space Grotesk', 'Outfit', sans-serif;
    --body: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono: 'Space Grotesk', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Metrics & Transitions */
    --wrap: 1240px;
    --pad: clamp(20px, 5vw, 72px);
    --ease: cubic-bezier(.16, .8, .24, 1);
    --radius: 0px;
}

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

html {
    scroll-behavior: smooth;
    touch-action: pan-y;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--paper);
    color: var(--ink);
    font-family: var(--body);
    font-weight: 400;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: clip;
    min-height: 100vh;
}

img, svg, picture, video {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.25s ease, opacity 0.25s ease;
}

button, input, select, textarea {
    font: inherit;
}

::selection {
    background: var(--patina);
    color: var(--white);
}

/* ── Layout Utilities ─────────────────────────────────────────────────────── */
.wrap-container {
    max-width: var(--wrap);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--pad);
    padding-right: var(--pad);
}

.section-py {
    padding-top: 110px;
    padding-bottom: 110px;
}

.section-py-sm {
    padding-top: 70px;
    padding-bottom: 70px;
}

/* ── Typography Elements ─────────────────────────────────────────────────── */
h1, h2 {
    font-family: var(--display);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.08;
    color: var(--ink);
}

h3, h4, h5, h6 {
    font-family: var(--heading-small);
    font-weight: 600;
    letter-spacing: -0.015em;
    color: var(--ink);
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--patina-deep);
    font-weight: 600;
    margin-bottom: 18px;
}

.eyebrow::before {
    content: '';
    width: 9px;
    height: 9px;
    flex: none;
    background: linear-gradient(var(--patina), var(--patina)) center/1px 100% no-repeat,
                linear-gradient(90deg, var(--patina), var(--patina)) center/100% 1px no-repeat;
}

.eyebrow.eyebrow-steel {
    color: var(--steel);
}

.eyebrow.eyebrow-steel::before {
    background: linear-gradient(var(--steel), var(--steel)) center/1px 100% no-repeat,
                linear-gradient(90deg, var(--steel), var(--steel)) center/100% 1px no-repeat;
}

.eyebrow.eyebrow-light {
    color: #9bb097;
}

.eyebrow.eyebrow-light::before {
    background: linear-gradient(#9bb097, #9bb097) center/1px 100% no-repeat,
                linear-gradient(90deg, #9bb097, #9bb097) center/100% 1px no-repeat;
}

.section-title {
    font-size: clamp(30px, 4vw, 48px);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.025em;
}

.section-subtitle {
    font-size: 16px;
    color: var(--ink-soft);
    max-width: 540px;
    line-height: 1.65;
    margin-top: 16px;
}

/* ── SVG Drawing Classes ─────────────────────────────────────────────────── */
.draw {
    stroke: var(--ink);
    fill: none;
    stroke-width: 1.2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.draw-soft {
    stroke: var(--steel);
    fill: none;
    stroke-width: 1;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ── Navigation Bar ──────────────────────────────────────────────────────── */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px var(--pad);
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: all 0.4s ease;
}

.site-nav.scrolled {
    padding: 13px var(--pad);
    background: rgba(250, 250, 247, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo-img {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: 2px;
    transition: transform 0.35s ease;
}

.nav-brand:hover .nav-logo-img {
    transform: scale(1.05) rotate(4deg);
}

.nav-brand-text {
    display: flex;
    flex-direction: column;
    font-family: var(--mono);
    line-height: 1.15;
}

.nav-brand-title {
    font-size: 14.5px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--ink);
}

.nav-brand-sub {
    font-size: 10px;
    color: var(--steel);
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.04em;
}

.nav-link-item a {
    position: relative;
    display: block;
    height: 20px;
    overflow: hidden;
    color: var(--ink-soft);
}

.nav-link-slider {
    display: flex;
    flex-direction: column;
    transition: transform 0.4s cubic-bezier(0.76, 0, 0.24, 1);
}

.nav-link-slider span {
    height: 20px;
    display: flex;
    align-items: center;
}

.nav-link-slider span:last-child {
    color: var(--patina-deep);
    font-weight: 600;
}

.nav-link-item a:hover .nav-link-slider {
    transform: translateY(-50%);
}

.nav-link-item.active a .nav-link-slider {
    transform: translateY(-50%);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 11px 20px;
    background: var(--ink);
    color: var(--paper);
    border: 1px solid var(--ink);
    font-weight: 600;
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.25s ease;
}

.nav-cta:hover {
    background: var(--patina-deep);
    border-color: var(--patina-deep);
    color: var(--white);
    transform: translateY(-1px);
}

.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 550;
}

.nav-hamburger span {
    display: block;
    width: 22px;
    height: 1.5px;
    background-color: var(--ink);
    transition: all 0.3s ease;
}

.nav-hamburger.open span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}

.nav-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: var(--patina);
    width: 0%;
    transition: width 0.1s linear;
}

/* ── Mobile Menu Overlay ─────────────────────────────────────────────────── */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: var(--paper);
    z-index: 490;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding: 100px var(--pad) 40px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s ease;
}

.mobile-menu-overlay.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-menu-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mobile-menu-item a {
    font-family: var(--display);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--ink);
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    transition: color 0.25s ease, padding-left 0.25s ease;
}

.mobile-menu-item a:hover {
    color: var(--patina-deep);
    padding-left: 8px;
}

.mobile-menu-cta {
    margin-top: 28px;
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 28px;
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: var(--ink);
    color: var(--paper);
    font-weight: 600;
}

/* ── Hero Section ────────────────────────────────────────────────────────── */
.hero-section {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    padding-top: 130px;
    padding-bottom: 90px;
    background: var(--paper);
    overflow: clip;
    z-index: 1;
}

.hero-grid-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, rgba(220, 217, 206, 0.4) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(220, 217, 206, 0.4) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 80% 65% at 60% 40%, black, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 80% 65% at 60% 40%, black, transparent 75%);
    opacity: 0.6;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge-strip {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.hero-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background: var(--white);
    border: 1px solid rgba(27, 27, 24, 0.15);
    border-radius: 9999px;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
}

.pulse-dot {
    position: relative;
    display: flex;
    width: 8px;
    height: 8px;
}

.pulse-dot-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--patina-deep);
    opacity: 0.75;
    animation: ping 1.8s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.pulse-dot-core {
    position: relative;
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--patina-deep);
}

.hero-badge-text-primary {
    font-family: var(--mono);
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-weight: 700;
    color: var(--ink);
}

.hero-badge-divider {
    color: rgba(27, 27, 24, 0.25);
}

.hero-badge-text-secondary {
    font-family: var(--mono);
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #55564E;
}

.hero-badge-line {
    width: 40px;
    height: 1px;
    background: rgba(27, 27, 24, 0.2);
}

.hero-badge-extra {
    font-family: var(--mono);
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: #7A7B72;
}

.hero-kicker {
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--patina-deep);
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hero-kicker-dot {
    width: 6px;
    height: 6px;
    background: var(--patina-deep);
}

.hero-title {
    font-size: clamp(38px, 5.4vw, 70px);
    line-height: 1.02;
    font-weight: 800;
    letter-spacing: -0.038em;
    color: var(--ink);
    margin-bottom: 10px;
}

.hero-title-line-1 {
    display: block;
    color: var(--ink);
}

.hero-title-line-2 {
    display: block;
    color: var(--patina-deep);
    font-weight: 700;
}

.hero-title-dot {
    color: var(--amber);
}

.hero-products-strip {
    font-family: var(--mono);
    font-size: clamp(11.5px, 1.2vw, 12.5px);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: #63645A;
    margin-top: 10px;
    margin-bottom: 16px;
    font-weight: 500;
}

.hero-paragraph {
    max-width: 500px;
    font-size: 16.5px;
    line-height: 1.7;
    color: #4F5048;
    margin-top: 14px;
}

.hero-specs-strip {
    margin: 28px 0;
    padding: 16px 0;
    border-top: 1px solid rgba(27, 27, 24, 0.12);
    border-bottom: 1px solid rgba(27, 27, 24, 0.12);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: 520px;
}

.hero-spec-item {
    display: flex;
    flex-direction: column;
}

.hero-spec-item:not(:first-child) {
    border-left: 1px solid rgba(27, 27, 24, 0.12);
    padding-left: 16px;
}

.hero-spec-label {
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: #7E8075;
}

.hero-spec-val {
    font-family: var(--mono);
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--ink);
    margin-top: 2px;
}

.hero-spec-val.accent {
    color: var(--patina-deep);
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 28px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 16px 28px;
    background: var(--ink);
    color: var(--paper);
    border: 1px solid var(--ink);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: var(--patina-deep);
    border-color: var(--patina-deep);
    color: var(--white);
    box-shadow: 0 6px 16px rgba(55, 74, 59, 0.18);
    transform: translateY(-1px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 16px 26px;
    background: transparent;
    color: var(--ink);
    border: 1px solid rgba(27, 27, 24, 0.3);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--ink);
    background: var(--ink);
    color: var(--paper);
    transform: translateY(-1px);
}

/* ── Hero Interactive Artwork Triangle ───────────────────────────────────── */
.hero-artwork-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 12px;
    height: 490px;
    position: relative;
}

.hero-spark-canvas {
    position: absolute;
    inset: 0;
    z-index: 10;
    pointer-events: none;
    width: 100%;
    height: 100%;
}

.hero-art-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--line);
    transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.hero-art-card.card-0 {
    grid-column: 1;
    grid-row: 1 / span 2;
    background: var(--paper);
}

.hero-art-card.card-1 {
    grid-column: 2;
    grid-row: 1;
    background: var(--paper-deep);
}

.hero-art-card.card-2 {
    grid-column: 2;
    grid-row: 2;
    background: #EAE8DF;
}

.hero-art-card.active {
    border-color: var(--patina);
    box-shadow: 0 0 0 1px var(--patina), 0 12px 30px -8px rgba(55, 74, 59, 0.16);
}

.hero-art-body {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 0;
    padding: 24px 20px 10px;
}

.hero-art-card.card-1 .hero-art-body,
.hero-art-card.card-2 .hero-art-body {
    padding: 16px 14px 6px;
}

.hero-art-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-art-footer {
    border-top: 1px solid var(--line);
    padding: 9px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color 0.3s ease;
}

.hero-art-card.active .hero-art-footer {
    background: rgba(75, 94, 79, 0.06);
}

.hero-art-label {
    font-family: var(--mono);
    font-size: 9px;
    letter-spacing: 0.12em;
    color: var(--steel);
    text-transform: uppercase;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 8px;
}

.hero-status-pill {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--mono);
    font-size: 8.5px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 700;
}

.hero-status-pill.welding {
    color: var(--patina-deep);
}

.hero-status-pill.ready {
    color: var(--steel);
    opacity: 0.75;
}

.hero-scroll-cue {
    position: absolute;
    bottom: 24px;
    left: var(--pad);
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--steel);
    text-transform: uppercase;
}

.hero-scroll-track {
    position: relative;
    width: 1px;
    height: 32px;
    background: var(--line);
    overflow: hidden;
}

.hero-scroll-bar {
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--patina);
    animation: scroll-indicator 1.8s var(--ease) infinite;
}

/* ── Marquee Ticker ──────────────────────────────────────────────────────── */
.marquee-wrapper {
    overflow: hidden;
    padding: 20px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--paper-deep);
}

.marquee-outer {
    width: 100%;
    overflow: hidden;
}

.marquee-track {
    display: flex;
    width: max-content;
    animation: scroll-left 34s linear infinite;
}

.marquee-outer:hover .marquee-track {
    animation-play-state: paused;
}

.marquee-item {
    display: inline-flex;
    align-items: center;
    gap: 28px;
    padding: 0 28px;
    font-family: var(--mono);
    font-size: 14px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-soft);
    white-space: nowrap;
}

.marquee-dash {
    color: var(--steel);
}

/* ── Blueprint Section (Philosophy / Why Choose Us) ──────────────────────── */
.blueprint-section {
    position: relative;
    padding: 120px 0;
    background: #FAFAF7;
    overflow: clip;
    z-index: 1;
}

.blueprint-canvas-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    mix-blend-mode: multiply;
}

.blueprint-grid-layout {
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 70px;
    align-items: start;
}

.quote-block {
    font-size: clamp(22px, 2.6vw, 32px);
    line-height: 1.35;
    color: var(--ink);
    font-weight: 600;
    letter-spacing: -0.02em;
    font-family: var(--display);
}

.quote-cite {
    display: block;
    margin-top: 24px;
    font-family: var(--mono);
    font-style: normal;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--steel);
}

.spec-list {
    border-top: 1px solid var(--line);
}

.spec-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 0;
    font-size: 14.5px;
    border-bottom: 1px solid var(--line);
}

.spec-key {
    font-family: var(--mono);
    color: var(--steel);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 12px;
}

.spec-val {
    text-align: right;
    max-width: 60%;
    color: var(--ink-soft);
}

/* ── Services Section & Grid ─────────────────────────────────────────────── */
.services-section {
    padding: 120px 0;
    background: var(--paper);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.service-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 28px;
    min-height: 390px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    color: var(--ink);
    transition: background-color 0.4s ease;
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    background: var(--white);
}

.service-thumb {
    width: 100%;
    height: 144px;
    margin-bottom: 20px;
    overflow: hidden;
    background: #181816;
    position: relative;
    border: 1px solid var(--line);
}

.service-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card:hover .service-thumb img {
    transform: scale(1.06);
}

.service-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    font-family: var(--mono);
    font-size: 9px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: rgba(0, 0, 0, 0.75);
    color: #fff;
    padding: 2px 7px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.service-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.service-num {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--steel);
}

.service-icon {
    color: var(--patina-deep);
    transition: transform 0.4s ease;
}

.service-card:hover .service-icon {
    transform: translateY(-3px);
}

.service-title {
    font-size: 18.5px;
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 8px;
    color: var(--ink);
}

.service-desc {
    font-size: 13.5px;
    color: var(--ink-soft);
    line-height: 1.6;
}

.service-expand-detail {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card:hover .service-expand-detail {
    max-height: 220px;
}

.service-expand-text {
    font-size: 12.5px;
    color: var(--ink-soft);
    line-height: 1.6;
    border-top: 1px solid var(--line);
    padding-top: 12px;
    margin-top: 10px;
}

.service-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink);
    margin-top: 20px;
    opacity: 0;
    transform: translateX(-6px);
    transition: all 0.3s ease;
}

.service-card:hover .service-card-link {
    opacity: 1;
    transform: translateX(0);
}

.tag-cloud-wrapper {
    margin-top: 60px;
    padding-top: 48px;
    border-top: 1px solid var(--line);
}

.tag-cloud-title {
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--steel);
    margin-bottom: 20px;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-pill {
    font-family: var(--mono);
    font-size: 13px;
    padding: 8px 16px;
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--ink-soft);
    user-select: none;
    transition: border-color 0.25s ease, color 0.25s ease;
}

/* ── Bento & Masonry Galleries ───────────────────────────────────────────── */
.gallery-section {
    padding: 120px 0;
    background: var(--paper-deep);
}

.gallery-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.filter-btn {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 8px 16px;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--steel);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.25s ease;
}

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

.filter-btn.active {
    border-color: var(--ink);
    background: var(--ink);
    color: var(--paper);
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 220px;
    gap: 12px;
}

.bento-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    min-height: 180px;
}

.bento-card img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.bento-card:hover img {
    transform: scale(1.07);
}

.bento-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.75) 0%, rgba(0, 0, 0, 0.15) 45%, transparent 100%);
}

.bento-color-tint {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.bento-card:hover .bento-color-tint {
    opacity: 1;
}

.bento-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 10;
    color: #FAFAF7;
    font-family: var(--mono);
    font-size: 9px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 3px 8px;
}

.bento-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px;
    z-index: 10;
}

.bento-meta {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 4px;
}

.bento-title {
    font-family: var(--display);
    font-size: 14.5px;
    font-weight: 600;
    color: #fff;
    line-height: 1.3;
    transform: translateY(4px);
    transition: transform 0.3s ease;
}

.bento-card:hover .bento-title {
    transform: translateY(0);
}

.bento-expand-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    opacity: 0;
    transform: scale(0.6);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.bento-card:hover .bento-expand-btn {
    opacity: 1;
    transform: scale(1);
}

/* Masonry Grid */
.masonry-grid {
    column-count: 4;
    column-gap: 12px;
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: 12px;
}

.masonry-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    background: #e8e6df;
}

.masonry-aspect {
    position: relative;
    padding-bottom: 75%;
    width: 100%;
}

.masonry-card img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.masonry-card:hover img {
    transform: scale(1.06);
}

.masonry-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.75) 0%, rgba(0, 0, 0, 0.1) 50%, transparent 100%);
    opacity: 0.5;
    transition: opacity 0.4s ease;
}

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

.masonry-bottom-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 14px;
    z-index: 10;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.masonry-card:hover .masonry-bottom-label {
    opacity: 1;
    transform: translateY(0);
}

/* ── Industries Served Section ───────────────────────────────────────────── */
.industries-section {
    padding: 120px 0;
    background: var(--patina-dark);
    color: var(--paper);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.industry-card {
    display: flex;
    flex-direction: column;
    padding: 28px;
    min-height: 200px;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: background-color 0.3s ease;
}

.industry-card:hover {
    background: rgba(255, 255, 255, 0.06);
}

.industry-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

.industry-num {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: #9bb097;
}

.industry-icon {
    color: #cad6c7;
    opacity: 0.4;
    transition: opacity 0.3s ease;
}

.industry-card:hover .industry-icon {
    opacity: 0.75;
}

.industry-body {
    margin-top: auto;
    padding-top: 32px;
}

.industry-title {
    font-size: 17px;
    font-weight: 600;
    color: #fff;
    line-height: 1.25;
}

.industry-desc {
    margin-top: 8px;
    font-family: var(--mono);
    font-size: 12px;
    color: #8dab88;
    line-height: 1.5;
}

/* ── Process Section ─────────────────────────────────────────────────────── */
.process-section {
    padding: 120px 0;
    background: var(--white);
    overflow: hidden;
}

.process-header-flex {
    display: flex;
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 40px;
}

.process-track-bar {
    position: relative;
    margin-bottom: 48px;
    height: 2px;
    background: var(--line);
    overflow: hidden;
}

.process-track-fill {
    position: absolute;
    inset: 0;
    background: var(--patina);
    transform-origin: left;
    transform: scaleX(0);
    transition: transform 0.2s ease;
}

.process-steps-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.process-step-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    transition: all 0.3s ease;
}

.step-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.step-num {
    font-family: var(--mono);
    font-size: 14px;
    font-weight: 700;
    color: var(--patina-deep);
    letter-spacing: 0.08em;
}

.step-timeline {
    font-family: var(--mono);
    font-size: 9.5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 2px 7px;
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--steel);
}

.step-phase {
    font-family: var(--mono);
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--steel);
    margin-bottom: 4px;
}

.step-title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--ink);
}

.step-desc {
    margin-top: 12px;
    font-size: 13.5px;
    color: var(--ink-soft);
    line-height: 1.6;
}

/* Mobile swipe process controls */
.process-mobile-ctrls {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid rgba(220, 217, 206, 0.6);
}

/* ── Testimonials Section ────────────────────────────────────────────────── */
.testimonials-section {
    padding: 120px 0;
    background: var(--paper-deep);
}

.quotes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    border-top: 1px solid var(--line);
    padding-top: 36px;
}

.quote-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.quote-text {
    font-size: 17px;
    line-height: 1.6;
    color: var(--ink);
}

.quote-author {
    margin-top: 24px;
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--steel);
}

/* Testimonial Submission Form */
.testimonial-form-container {
    padding: 32px;
    border: 1px solid var(--line);
    max-width: 680px;
    background: var(--paper);
    margin-bottom: 48px;
    display: none;
}

.testimonial-form-container.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

/* ── Enquiry Section ─────────────────────────────────────────────────────── */
.enquiry-section {
    padding: 120px 0;
    background: var(--ink);
    color: var(--paper);
    overflow: clip;
}

.enquiry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
}

.enquiry-form-field {
    margin-bottom: 22px;
}

.enquiry-label {
    display: block;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #9C9B90;
    margin-bottom: 8px;
}

.enquiry-input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid #46453D;
    font-family: var(--body);
    font-size: 15px;
    padding: 10px 2px;
    color: var(--paper);
    outline: none;
    transition: border-color 0.3s ease;
}

.enquiry-input:focus {
    border-bottom-color: var(--patina);
}

.enquiry-input::placeholder {
    color: #6a6960;
}

.enquiry-select {
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    border: none;
    border-bottom: 1px solid #46453D;
    font-family: var(--body);
    font-size: 15px;
    padding: 10px 2px;
    color: var(--paper);
    width: 100%;
    outline: none;
    cursor: pointer;
}

.enquiry-select option {
    background: var(--ink);
    color: var(--paper);
}

.enquiry-submit-btn {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 16px 28px;
    background: var(--paper);
    color: var(--ink);
    border: 1px solid var(--paper);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.enquiry-submit-btn:hover {
    background: var(--patina-deep);
    border-color: var(--patina-deep);
    color: var(--white);
}

/* ── Lightbox Image Modal ────────────────────────────────────────────────── */
.image-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.modal-close-btn {
    position: absolute;
    top: 24px;
    right: 24px;
    z-index: 100;
    padding: 10px 18px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    border-radius: 9999px;
    transition: background-color 0.2s ease;
}

.modal-close-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

.modal-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.modal-nav-btn:hover {
    background: rgba(0, 0, 0, 0.95);
    border-color: #fff;
}

.modal-nav-btn.prev {
    left: 24px;
}

.modal-nav-btn.next {
    right: 24px;
}

.modal-window {
    position: relative;
    max-width: 1060px;
    width: 100%;
    max-height: 90vh;
    background: #141412;
    border: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-image-col {
    position: relative;
    flex: 1;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 480px;
}

.modal-image-col img {
    max-height: 75vh;
    width: 100%;
    object-fit: contain;
    padding: 12px;
}

.modal-counter-badge {
    position: absolute;
    bottom: 16px;
    left: 16px;
    background: rgba(0, 0, 0, 0.7);
    color: rgba(255, 255, 255, 0.85);
    font-family: var(--mono);
    font-size: 11px;
    padding: 4px 10px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.modal-info-col {
    width: 340px;
    padding: 32px;
    background: #181816;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
}

.modal-cat-tag {
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #a8b89c;
    padding: 3px 8px;
    border: 1px solid rgba(168, 184, 156, 0.3);
    background: rgba(168, 184, 156, 0.1);
}

.modal-year {
    font-family: var(--mono);
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
}

.modal-project-title {
    font-family: var(--display);
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin-top: 14px;
    margin-bottom: 8px;
}

.modal-project-loc {
    font-family: var(--mono);
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.modal-project-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.6;
    margin-bottom: 24px;
}

.modal-spec-box {
    padding: 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 24px;
}

.modal-spec-label {
    font-family: var(--mono);
    font-size: 10.5px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.1em;
    margin-bottom: 4px;
}

.modal-spec-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.9);
}

.modal-enquire-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 20px;
    background: #2d4031;
    color: #fff;
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: background-color 0.25s ease;
}

.modal-enquire-btn:hover {
    background: #3b5240;
}

/* ── Accordion Component ─────────────────────────────────────────────────── */
.accordion-wrapper {
    width: 100%;
    border-top: 1px solid var(--line);
}

.accordion-item {
    border-bottom: 1px solid var(--line);
    transition: background-color 0.3s ease;
}

.accordion-item.active {
    background: var(--white);
}

.accordion-header {
    width: 100%;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    padding: 24px 0;
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    color: var(--ink);
}

.accordion-title {
    font-family: var(--mono);
    font-size: 14.5px;
    font-weight: 600;
    line-height: 1.4;
    padding-right: 16px;
    color: var(--ink);
}

.accordion-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

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

.accordion-content-inner {
    padding-bottom: 24px;
    font-size: 14px;
    line-height: 1.65;
    color: var(--ink-soft);
}

/* ── Page Hero (Shared between subpages) ──────────────────────────────────── */
.page-hero {
    position: relative;
    display: flex;
    align-items: center;
    padding-top: 140px;
    padding-bottom: 90px;
    min-height: 60vh;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    overflow: clip;
}

.page-hero.dark {
    background: var(--patina-dark);
    color: var(--paper);
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.page-hero-grid-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, var(--line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--line) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse 70% 80% at 20% 50%, black, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 80% at 20% 50%, black, transparent 70%);
    opacity: 0.5;
}

.page-hero.dark .page-hero-grid-bg {
    background-image:
        linear-gradient(to right, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    opacity: 0.6;
}

.page-hero-corner {
    position: absolute;
    top: 90px;
    right: var(--pad);
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--patina-deep);
    opacity: 0.6;
}

.page-hero.dark .page-hero-corner {
    color: #9bb097;
}

.page-hero-title {
    font-size: clamp(38px, 5.5vw, 72px);
    line-height: 1.08;
    letter-spacing: -0.03em;
    font-weight: 700;
}

.page-hero-title-accent {
    color: var(--patina);
}

.page-hero.dark .page-hero-title-accent {
    color: #9bb097;
}

.page-hero-sub {
    margin-top: 24px;
    max-width: 500px;
    font-size: 17px;
    line-height: 1.65;
    color: var(--ink-soft);
}

.page-hero.dark .page-hero-sub {
    color: #cad6c7;
}

/* ── Stats Strip ─────────────────────────────────────────────────────────── */
.stats-strip {
    padding: 60px 0;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-family: var(--display);
    font-size: clamp(36px, 4vw, 56px);
    line-height: 1;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--ink);
}

.stat-label {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--steel);
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
.site-footer {
    padding-top: 70px;
    padding-bottom: 34px;
    background: var(--ink);
    color: #9C9B90;
    border-top: 1px solid #33322B;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 40px;
    padding-bottom: 60px;
    border-bottom: 1px solid #33322B;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-brand-title {
    font-family: var(--mono);
    font-size: 14px;
    letter-spacing: 0.08em;
    color: var(--paper);
    font-weight: 700;
}

.footer-desc {
    font-size: 13.5px;
    line-height: 1.6;
    max-width: 280px;
    color: #9C9B90;
}

.footer-col-title {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #6b6a60;
    margin-bottom: 16px;
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 14px;
}

.footer-list a {
    color: inherit;
    transition: color 0.2s ease;
}

.footer-list a:hover {
    color: var(--paper);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding-top: 28px;
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: 0.04em;
    color: #7A7B72;
}

/* ── Back to Top Button ──────────────────────────────────────────────────── */
.back-to-top-btn {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 12px 16px;
    background: var(--ink);
    color: var(--paper);
    border: 1px solid var(--ink);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    opacity: 0;
    transform: translateY(16px);
    pointer-events: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(8px);
}

.back-to-top-btn.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top-btn:hover {
    background: var(--patina-deep);
    border-color: var(--patina-deep);
    color: var(--white);
}

/* ── Custom Architectural Cursor (Desktop Pointer Only) ─────────────────── */
@media (pointer: fine) {
    .custom-cursor-dot,
    .custom-cursor-ring {
        position: fixed;
        top: 0;
        left: 0;
        pointer-events: none;
        z-index: 99999;
        display: block;
    }

    .custom-cursor-dot {
        width: 5px;
        height: 5px;
        border-radius: 50%;
        background: var(--ink);
        transform: translate(-50%, -50%);
        transition: transform 0.2s ease, opacity 0.2s ease;
    }

    .custom-cursor-ring {
        width: 32px;
        height: 32px;
        border: 1px solid var(--steel);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: width 0.3s ease, height 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
    }

    .custom-cursor-ring.hover {
        width: 48px;
        height: 48px;
        border-color: var(--patina);
        background: rgba(75, 94, 79, 0.08);
    }
}