/* ============================================
   REVENPRO STUDIO — Total Visual Overhaul
   Inspired by SideHub, Palantir & Apple
   Colors: Gris claro + Naranja Mandarina
   ============================================ */

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

:root {
    /* Brand Palette — ORIGINAL */
    --white: #ffffff;
    --off-white: #f7f7f9;
    --bg-light: #f0f0f4;
    --bg-warm: #faf9f7;

    --text-dark: #111118;
    --text-body: #3d3d50;
    --text-muted: #8888a0;
    --text-faint: #b0b0c0;

    /* Naranja Mandarina */
    --accent: #8888a0;
    --accent-hover: #79798e;
    --accent-light: #cecece;
    --accent-pale: linear-gradient(135deg, #8888a039 0%, #c6cad350 55%, #45484f3f 80%);
    --accent-glow: rgba(114, 109, 99, 0.18);
    --accent-strong: rgba(159, 153, 144, 0.35);

    --red: #e03e3e;
    --red-pale: rgba(224, 62, 62, 0.06);
    --green: #2d9e5a;
    --green-pale: rgba(45, 158, 90, 0.06);

    --border-light: rgba(0, 0, 0, 0.05);
    --border-mid: rgba(0, 0, 0, 0.08);

    /* Glass effects */
    --glass-white: rgba(255, 255, 255, 0.2);
    --glass-white-strong: rgba(255, 255, 255, 0.4);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    --glass-shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.08);

    /* Dark section */
    --dark-bg: #111118;
    --dark-surface: #1a1a24;
    --dark-border: rgba(255, 255, 255, 0.08);
    --dark-text: #e8e8f0;
    --dark-muted: #777790;

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Montserrat', 'Inter', sans-serif;

    /* Spacing */
    --section-gap: clamp(100px, 15vw, 180px);
    --max-w: 1260px;
    --px: clamp(20px, 5vw, 48px);

    /* Motion */
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0, 1);

    /* Radius */
    --r-sm: 12px;
    --r-md: 18px;
    --r-lg: 26px;
    --r-xl: 32px;
    --r-full: 200px;
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; border: none; background: none; cursor: pointer; color: inherit; }
ul { list-style: none; }

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

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

.text-gradient {
    background: linear-gradient(135deg, var(--accent) 0%, #45484f 80%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* ---------- Section Label (SideHub style) ---------- */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 36px;
}

.section-label__number {
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.08em;
    background: var(--accent-pale);
    padding: 6px 14px;
    border-radius: var(--r-full);
}

.section-label__text {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.16em;
}

/* ---------- Buttons (Rounded pill, Apple-like) ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 28px;
    border-radius: var(--r-full);
    font-weight: 600;
    font-size: 15px;
    letter-spacing: -0.01em;
    transition: all 0.45s var(--ease);
    position: relative;
    white-space: nowrap;
}

.btn--primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}
.btn--primary:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px var(--accent-strong);
}
.btn--primary svg { transition: transform 0.35s var(--ease); }
.btn--primary:hover svg { transform: translateX(5px); }

.btn--ghost {
    background: var(--glass-white);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-dark);
    border: 1px solid var(--border-light);
    box-shadow: var(--glass-shadow);
}
.btn--ghost:hover {
    background: var(--white);
    border-color: var(--accent-glow);
    transform: translateY(-3px);
    box-shadow: var(--glass-shadow-lg);
}

.btn--outline {
    background: transparent;
    color: var(--accent);
    border: 1.5px solid var(--accent);
}
.btn--outline:hover {
    background: var(--accent-pale);
    transform: translateY(-3px);
}

.btn--dark {
    background: var(--text-dark);
    color: #fff;
}
.btn--dark:hover {
    background: #222230;
    transform: translateY(-3px);
}

 .btn--lg { padding: 16px 44px; font-size: 16px; background: #5c7fb3 /*linear-gradient(135deg, #75759a 0%,  80%) */; }
 .btn--lg:hover { background: #4c6aa0; transform: translateY(-3px); }
.btn--full { width: 100%; justify-content: center; }

/* ==========================================================
   NAVIGATION — Floating frosted glass (Apple style)
   ========================================================== */
.nav {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    width: calc(100% - 40px);
    max-width: 1280px;
    padding: 0;
    transition: all 0.5s var(--ease);
}

.nav__container {
    background: var(--glass-white-strong);
    backdrop-filter: blur(9px) saturate(100%);
    -webkit-backdrop-filter: blur(9px) saturate(100%);
    border: 1px solid var(--glass-border);
    border-radius: var(--r-full);
    padding: 10px 12px 10px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06), inset 0 1px 0 rgba(255,255,255,0.7);
    box-shadow: 0 8px 40px rgba(114, 113, 130, 0.136);
}

.nav__logo { display: flex; align-items: center; gap: 8px; z-index: 1001; }
.nav__logo-icon { color: var(--accent); font-size: 20px; transition: color 0.4s var(--ease); }
.nav__logo-text { font-family: var(--font-display); font-size: 17px; font-weight: 700; letter-spacing: -0.02em; transition: color 0.4s var(--ease); }
.nav__logo-text span { font-weight: 400; color: var(--text-body); transition: color 0.4s var(--ease); }

/* Nav text adapts to dark backgrounds */
.nav--on-dark .nav__logo-text { color: #fff; }
.nav--on-dark .nav__logo-text span { color: #d6d5eb; }
.nav--on-dark .nav__link { color: rgba(255,255,255,0.7); }
.nav--on-dark .nav__link:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav--on-dark .nav__link--active { color: #fff; background: rgba(255,255,255,0.1); }
.nav--on-dark .nav__burger span { background: #fff; }



.nav__links { display: flex; align-items: center; gap: 6px; }

.nav__link {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-body);
    padding: 8px 16px;
    border-radius: var(--r-full);
    transition: all 0.4s var(--ease);
}
.nav__link::after { display: none; }
.nav__link:hover { background: rgba(0, 0, 0, 0.04); color: var(--text-dark); }
.nav__link--active { background: rgba(0, 0, 0, 0.05); color: var(--text-dark); }

.nav__link--cta {
    background: var(--accent) !important;
    color: #fff !important;
    padding: 10px 22px;
    font-weight: 600;
    margin-left: 4px;
    box-shadow: 0 2px 12px var(--accent-glow);
}
.nav__link--cta:hover {
    background: var(--accent-hover) !important;
    box-shadow: 0 4px 20px var(--accent-strong);
    transform: translateY(-1px);
}

.nav__burger { display: none; flex-direction: column; gap: 5px; z-index: 1001; padding: 8px; }
.nav__burger span { display: block; width: 20px; height: 1.5px; background: var(--text-body); transition: all 0.3s var(--ease); transform-origin: center; }
.nav__burger--active span:nth-child(1) { transform: rotate(45deg) translate(3px, 5px); }
.nav__burger--active span:nth-child(2) { opacity: 0; }
.nav__burger--active span:nth-child(3) { transform: rotate(-45deg) translate(3px, -5px); }

/* ==========================================================
   HERO — Full viewport, centered, Apple-clean
   ========================================================== */
.hero {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 110px 0 100px;
    background: var(--white);
}

.hero__bg { position: absolute; inset: 0; z-index: 0; }

.hero__grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse 55% 55% at 50% 45%, black 15%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 55% 55% at 50% 45%, black 15%, transparent 70%);
}

.hero__gradient-orb { position: absolute; border-radius: 50%; filter: blur(120px); will-change: transform; }
.hero__gradient-orb--1 { width: 600px; height: 600px; background: rgba(245, 165, 36, 0.07); top: -180px; right: -120px; animation: orbA 16s ease-in-out infinite; }
.hero__gradient-orb--2 { width: 450px; height: 450px; background: rgba(245, 165, 36, 0.05); bottom: -120px; left: -100px; animation: orbB 20s ease-in-out infinite; }
@keyframes orbA { 0%,100%{transform:translate(0,0)}50%{transform:translate(-30px,25px)} }
@keyframes orbB { 0%,100%{transform:translate(0,0)}50%{transform:translate(25px,-30px)} }

.hero__container {
    position: relative; z-index: 1;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--px);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 22px;
    background: var(--accent-pale);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: var(--r-full);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-body);
    margin-bottom: 20px;
    box-shadow: var(--glass-shadow);
    align-self: flex-start;
}

.hero__badge-dot {
    width: 7px; height: 7px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 10px var(--accent-glow);
}
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.6)} }

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(38px, 7vw, 70px);
    font-weight: 700;
    line-height: 1.02;
    letter-spacing: -0.045em;
    margin-bottom: 32px;
}
.hero__title-line { display: block;
    margin: 5px;
}
.hero__title-line--accent { color: var(--accent); }

.hero__subtitle {
    font-size: clamp(16px, 1.8vw, 19px);
    line-height: 1.75;
    color: var(--text-body);
    max-width: 600px;
    margin: 0 auto 48px;
}
.hero__subtitle strong { color: var(--text-dark); font-weight: 600; }

.hero__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero__screen {
    width: 100%;
    max-width: 800px;
    transition: all 0.5s var(--ease);
}

.hero__scroll-indicator { position: absolute; bottom: 32px; right: var(--px); display: flex; flex-direction: column; align-items: center; gap: 10px; z-index: 1; }
.hero__scroll-indicator span { font-size: 9px; font-weight: 600; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.3em; writing-mode: vertical-rl; }
.hero__scroll-line { width: 1px; height: 50px; background: linear-gradient(to bottom, var(--accent), transparent); animation: scrollLine 2.5s ease-in-out infinite; }
@keyframes scrollLine { 0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}50.1%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom} }

/* ==========================================================
   MARQUEE
   ========================================================== */
.marquee {
    padding: 18px 0;
    background: var(--white);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    overflow: hidden;
}
.marquee__track { display: flex; animation: marquee 35s linear infinite; }
.marquee__content { display: flex; align-items: center; gap: 44px; white-space: nowrap; padding-right: 44px; flex-shrink: 0; }
.marquee__content span { font-family: var(--font-display); font-size: 12px; font-weight: 600; letter-spacing: 0.22em; color: var(--text-faint); }
.marquee__dot { color: var(--accent) !important; font-size: 8px !important; }
@keyframes marquee { 0%{transform:translateX(0)}100%{transform:translateX(-50%)} }

/* ==========================================================
   CLAIM WINDOW — Fixed BG + Glass overlay
   ========================================================== */
.claim-window {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('../images/claim_window.png') no-repeat center fixed;
    background-size: 60%;
    overflow: hidden;
}

/* iOS / mobile fallback — fixed attachment not supported */
@supports (-webkit-touch-callout: none) {
    .claim-window {
        background-attachment: scroll;
        background-size: cover;
    }
}

.claim-window__glass {
    position: relative;
    width: 100%;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(140, 140, 140, 0.366);
    backdrop-filter: blur(0px) saturate(120%);
    -webkit-backdrop-filter: blur(5px) saturate(120%);
    border-top: 1px solid rgba(255, 255, 255, 0.35);
    border-bottom: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.5), inset 0 -1px 0 rgba(255,255,255,0.3), 0 8px 32px rgba(0,0,0,0.1);
}

.claim-window__content {
    text-align: center;
    padding: 100px var(--px);
}

.claim-window__title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5.5vw, 64px);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
    color: #fff ;
}

.claim-window__text {
    font-size: clamp(16px, 1.8vw, 20px);
    color: var(--text-body);
    margin-bottom: 40px;
    line-height: 1.7;
}

/* ==========================================================
   PROBLEM — Glass cards side by side
   ========================================================== */
.problem { padding: var(--section-gap) 0; background: var(--off-white); }

.problem__grid { display: grid; grid-template-columns: 1fr; gap: 72px; align-items: start; grid-auto-rows: auto; }

.problem__title {
    font-family: var(--font-display);
    font-size: clamp(28px, 3.8vw, 46px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 28px;
}

.problem__text { font-size: 16px; line-height: 1.8; color: var(--text-body); margin-bottom: 16px; }
.problem__text strong { color: var(--text-dark); }

.problem__cards { display: grid; gap: 16px; }

.problem__card {
    padding: 32px;
    border-radius: var(--r-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    transition: all 0.5s var(--ease);
    box-shadow: var(--glass-shadow);
}
.problem__card:hover { transform: translateY(-6px); box-shadow: var(--glass-shadow-lg); }

.problem__card--bad { background: rgba(255, 255, 255, 0.6); border-left: 3px solid var(--red); }
.problem__card--good { background: rgba(255, 255, 255, 0.7); border-left: 3px solid #ACF024; }

.problem__card-icon { font-size: 18px; margin-bottom: 14px; }
.problem__card--bad .problem__card-icon { color: var(--red); }
.problem__card--good .problem__card-icon { color: #ACF024; }

.problem__card-title { font-family: var(--font-display); font-size: 17px; font-weight: 600; margin-bottom: 14px; }

.problem__card-list li { font-size: 14px; color: var(--text-body); padding: 6px 0 6px 22px; position: relative; }
.problem__card--bad .problem__card-list li::before { content: '✕'; position: absolute; left: 0; color: var(--red); font-size: 11px; }
.problem__card--good .problem__card-list li::before { content: '✓'; position: absolute; left: 0; color: #ACF024; font-weight: 700; }

/* ==========================================================
   DIFFERENCE — Full-width dark section (SideHub contrast)
   ========================================================== */
.difference {
    padding: var(--section-gap) 0;
    background: var(--dark-bg);
    color: var(--dark-text);
    position: relative;
    overflow: hidden;
}



.difference::before {
    content: '';
    position: absolute;
    top: -300px;
    right: -200px;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(245, 165, 36, 0.06), transparent 65%);
    pointer-events: none;
}

.difference .section-label__number { background: linear-gradient(135deg, #8888a069 0%, #c6cad369 55%, #4f515869 100%); }
.difference .section-label__text { color: var(--dark-muted); }

.difference__title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5.5vw, 68px);
    font-weight: 700;
    line-height: 1.06;
    letter-spacing: -0.045em;
    margin-bottom: 88px;
    max-width: 900px;
}

.difference__features { display: grid; gap: 0; }

.difference__feature {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 40px;
    padding: 52px 0;
    border-top: 1px solid var(--dark-border);
    transition: all 0.5s var(--ease);
    position: relative;
}

.difference__feature::before {
    content: '';
    position: absolute;
    inset: 0 calc(var(--px) * -1);
    padding: 0 var(--px);
    background: linear-gradient(90deg, rgba(139, 138, 170, 0.101), transparent 70%);
    opacity: 0;
    transition: opacity 0.5s var(--ease);
    border-radius: var(--r-md);
}
.difference__feature:hover::before { opacity: 1; }

.difference__feature-number {
    font-family: var(--font-display);
    font-size: 56px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.06);
    line-height: 1;
    transition: all 0.5s var(--ease);
    position: relative;
}
.difference__feature:hover .difference__feature-number {
    color: var(--accent);
    text-shadow: 0 0 60px rgba(142, 152, 170, 0.3);
}

.difference__feature-content { position: relative; }
.difference__feature-content h3 {
    font-family: var(--font-display);
    font-size: clamp(20px, 2.5vw, 28px);
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    color: #fff;
}
.difference__feature-content p { font-size: 15px; line-height: 1.8; color: var(--dark-muted); max-width: 580px; }

/* ==========================================================
   PROCESS — Cards grid (SideHub "How we work" style)
   ========================================================== */
.process {
    padding: var(--section-gap) 0;
    background: var(--white);
    position: relative;
}

.process__title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5.5vw, 68px);
    font-weight: 700;
    line-height: 1.06;
    letter-spacing: -0.045em;
    margin-bottom: 72px;
}

.process__timeline {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.process__step {
    display: flex;
    flex-direction: column;
    padding: 0;
    background: var(--glass-white-strong);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: all 0.5s var(--ease);
    box-shadow: var(--glass-shadow);
}
.process__step:hover {
    transform: translateY(-6px);
    box-shadow: var(--glass-shadow-lg);
    border-color: var(--accent-glow);
}

.process__step-marker {
    padding: 28px 32px 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.process__step-dot {
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 16px var(--accent-glow);
}

.process__step-line { display: none; }

.process__step-phase {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-pale);
    padding: 4px 12px;
    border-radius: var(--r-full);
    text-transform: uppercase;
    letter-spacing: 0.18em;
}

.process__step-content { padding: 20px 32px 32px; }
.process__step-content h3 {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}
.process__step-content p { font-size: 15px; line-height: 1.75; color: var(--text-body); }

/* ==========================================================
   PROJECTS — Gallery grid
   ========================================================== */
.projects { padding: var(--section-gap) 0; background: var(--off-white); }

.projects__title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5.5vw, 68px);
    font-weight: 700;
    line-height: 1.06;
    letter-spacing: -0.045em;
    margin-bottom: 12px;
}

.projects__subtitle { font-size: 17px; color: var(--text-body); margin-bottom: 56px; }

.projects__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    padding: 0 var(--px);
}

.project-card {
    border-radius: var(--r-lg);
    overflow: hidden;
    background: var(--white);
    border: 1px solid var(--border-light);
    transition: all 0.5s var(--ease);
    display: block;
    box-shadow: var(--glass-shadow);
}
.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--glass-shadow-lg);
    border-color: var(--accent-glow);
}

.project-card__image { position: relative; overflow: hidden; aspect-ratio: 16 / 10; }
.project-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s var(--ease); }
.project-card:hover .project-card__image img { transform: scale(1.06); }

.project-card__overlay {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(17, 17, 24, 0.7) 100%);
    display: flex; align-items: flex-end; justify-content: center;
    padding-bottom: 20px;
    opacity: 0;
    transition: opacity 0.4s ease;
}
.project-card:hover .project-card__overlay { opacity: 1; }

.project-card__view {
    font-weight: 600; font-size: 13px;
    color: #fff;
    background: var(--accent);
    padding: 10px 26px;
    border-radius: var(--r-full);
}

.project-card__info { padding: 24px; }
.project-card__tag {
    font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--accent);
    background: var(--accent-pale);
    padding: 5px 14px;
    border-radius: var(--r-full);
    display: inline-block;
    margin-bottom: 12px;
}
.project-card__name { font-family: var(--font-display); font-size: 19px; font-weight: 600; margin-bottom: 6px; letter-spacing: -0.01em; }
.project-card__desc { font-size: 14px; color: var(--text-body); line-height: 1.6; }

/* ==========================================================
   CODE SECTION — White glass bento grid
   ========================================================== */
.code-section { padding: var(--section-gap) 0; background: var(--white); }

.code-section__title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5.5vw, 68px);
    font-weight: 700;
    line-height: 1.06;
    letter-spacing: -0.045em;
    margin-bottom: 12px;
}
.code-section__subtitle { font-size: 17px; color: var(--text-body); margin-bottom: 56px; max-width: 540px; }

.code-section__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.code-card {
    background: var(--off-white);
    border: 1px solid var(--border-light);
    border-radius: var(--r-lg);
    padding: 36px;
    transition: all 0.5s var(--ease);
    position: relative;
    overflow: hidden;
}

.code-card::after {
    content: '';
    position: absolute;
    top: 0; left: 20%; right: 20%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
}
.code-card:hover::after { opacity: 0.5; }

.code-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--glass-shadow-lg);
    border-color: var(--accent-glow);
    background: var(--white);
}

.code-card__icon {
    width: 48px; height: 48px;
    border-radius: var(--r-md);
    background: var(--accent-pale);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 24px;
}
.code-card__icon svg { width: 22px; height: 22px; color: var(--accent); }

.code-card h3 { font-family: var(--font-display); font-size: 18px; font-weight: 600; margin-bottom: 10px; letter-spacing: -0.01em; }
.code-card p { font-size: 14px; line-height: 1.8; color: var(--text-body); }

/* Terminal blocks */
.code-section__blocks {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.code-block {
    background: #161620;
    border-left: 3px solid #ACF024;
    padding: 28px 36px;
    transition: border-color 0.3s ease, transform 0.4s var(--ease);
    position: relative;
    overflow: hidden;
}

.code-block::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(245,165,36,0.04) 0%, transparent 40%);
    opacity: 0;
    transition: opacity 0.4s ease;
}
.code-block:hover::before { opacity: 1; }
.code-block:hover { transform: translateX(4px); }

.code-block__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 8px;
}

.code-block__tag {
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 14px;
    font-weight: 600;
    color: #ACF024;
    letter-spacing: 0.02em;
}

.code-block__comment {
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 13px;
    color: #aea6f4;
    letter-spacing: 0.01em;
}

.code-block__content {
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.7;
    color: #c8c8d8;
    letter-spacing: 0.01em;
}

/* ==========================================================
   MANIFESTO — Dark banner with glass glow
   ========================================================== */
.manifesto {
    padding: var(--section-gap) 0;
    background: var(--dark-bg);
    position: relative;
    overflow: hidden;
}

.manifesto::before {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 900px; height: 900px;
    background: radial-gradient(circle, rgba(245, 165, 36, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.manifesto__content { position: relative; text-align: center; max-width: 820px; margin: 0 auto; }

.manifesto__badge {
    display: inline-block;
    font-size: 11px; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.18em;
    color: var(--accent);
    background: var(--accent-pale);
    padding: 7px 22px;
    border-radius: var(--r-full);
    margin-bottom: 44px;
}

.manifesto__title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4.5vw, 52px);
    font-weight: 700;
    line-height: 1.18;
    letter-spacing: -0.03em;
    margin-bottom: 32px;
    color: #fff;
}

.manifesto__text { font-size: 17px; line-height: 1.8; color: var(--dark-muted); margin-bottom: 16px; }
.manifesto__text strong { color: var(--dark-text); }
.manifesto__text:last-of-type { margin-bottom: 48px; }

/* ==========================================================
   CONCEPTS — Cards for each concept site (SideHub project cards)
   ========================================================== */
.concepts {
    padding: var(--section-gap) 0;
    background: var(--off-white);
}

.concepts__title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 52px);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    text-align: center;
}

.concepts__subtitle {
    font-size: 17px;
    color: var(--text-body);
    max-width: 600px;
    margin: 0 auto 56px;
    line-height: 1.7;
    text-align: center;
}

.concepts__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.concept-card {
    display: flex;
    flex-direction: column;
    border-radius: var(--r-lg);
    overflow: hidden;
    background: var(--white);
    border: 1px solid var(--border-light);
    transition: all 0.5s var(--ease);
    box-shadow: var(--glass-shadow);
    text-decoration: none;
    color: inherit;
}
.concept-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--glass-shadow-lg);
    border-color: var(--accent-glow);
}

.concept-card__preview {
    aspect-ratio: 16 / 10;
    background: var(--dark-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    position: relative;
    overflow: hidden;
}

.concept-card__preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease);
}

.concept-card:hover .concept-card__preview img {
    transform: scale(1.05);
}

.concept-card__preview::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 80%, rgba(245, 165, 36, 0.08), transparent 60%);
}

.concept-card__tagline {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    text-align: center;
    letter-spacing: -0.02em;
    line-height: 1.2;
    position: relative;
    z-index: 1;
}

.concept-card__body { padding: 28px; flex: 1; display: flex; flex-direction: column; }

.concept-card__badges {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.concept-card__badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    background: var(--accent-pale);
    padding: 5px 14px;
    border-radius: var(--r-full);
    width: fit-content;
}

.concept-card__badge--green {
    color: #ACF024;
    background: rgba(172, 240, 36, 0.1);
    margin-left: auto;
}

.concept-card__badge--green .concept-card__badge-dot {
    background: #ACF024;
}

.concept-card__badge-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #ACF024;
    animation: pulse 2s ease-in-out infinite;
}

.concept-card__name {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.concept-card__desc {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.65;
    margin-bottom: 20px;
    flex: 1;
}

.concept-card__link {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s var(--ease);
}
.concept-card:hover .concept-card__link { gap: 10px; }

.concepts__cta { text-align: center; }

/* ==========================================================
   FAQ — Clean accordion
   ========================================================== */
.faq { padding: var(--section-gap) 0; background: var(--white); }

.faq__title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 64px;
}

.faq__list { max-width: 780px; }

.faq__item { border-bottom: 1px solid var(--border-light); }

.faq__question {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%;
    padding: 28px 0;
    text-align: left;
    font-size: 17px;
    font-weight: 600;
    transition: color 0.3s ease;
    letter-spacing: -0.01em;
}
.faq__question:hover { color: var(--accent); }

.faq__icon { width: 20px; height: 20px; flex-shrink: 0; transition: transform 0.4s var(--ease), color 0.3s ease; color: var(--text-faint); }
.faq__item--active .faq__icon { transform: rotate(45deg); color: var(--accent); }

.faq__answer { max-height: 0; overflow: hidden; transition: max-height 0.5s var(--ease), padding 0.5s var(--ease); }
.faq__item--active .faq__answer { max-height: 300px; padding-bottom: 28px; }
.faq__answer p { font-size: 15px; line-height: 1.8; color: var(--text-body); }

/* ==========================================================
   CONTACT — Split layout with glass form
   ========================================================== */
.contact { padding: var(--section-gap) 0; background: var(--off-white); }

.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }

.contact__title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 46px);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}
.contact__text { font-size: 16px; line-height: 1.75; color: var(--text-body); margin-bottom: 44px; }

.contact__note {
    display: flex; gap: 16px;
    padding: 24px;
    background: #acf0249e;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: var(--r-md);
    box-shadow: var(--glass-shadow);
}
.contact__note-icon svg { width: 24px; height: 24px; color: var(--accent-hover); flex-shrink: 0; }
.contact__note strong { display: block; font-size: 16px; margin-bottom: 6px;}
.contact__note p { font-size: 13px; line-height: 1.6; }

/* Form — Frosted glass card */
.contact__form {
    background: var(--glass-white-strong);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--r-xl);
    padding: 44px;
    box-shadow: var(--glass-shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.9);
    position: relative;
    overflow: hidden;
}

.contact__form::before {
    content: '';
    position: absolute;
    top: 0; left: 10%; right: 10%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.3;
}

.form-group { margin-bottom: 22px; }
.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
    letter-spacing: 0.04em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--border-light);
    border-radius: var(--r-sm);
    color: var(--text-dark);
    font-family: inherit;
    font-size: 15px;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    background: var(--white);
    box-shadow: 0 0 0 3px var(--accent-pale), 0 4px 20px rgba(245, 165, 36, 0.06);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-faint); }

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group--checkbox { display: flex; align-items: flex-start; gap: 12px; }
.form-group--checkbox input[type="checkbox"] { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; accent-color: var(--accent); }
.form-group--checkbox label { font-size: 13px; color: var(--text-body); line-height: 1.5; margin-bottom: 0; font-weight: 400; letter-spacing: 0; }
.form-group--checkbox label a { color: var(--accent); text-decoration: underline; text-decoration-color: var(--accent-glow); }

/* Form feedback messages */
.form__feedback {
    font-size: 14px;
    font-weight: 500;
    padding: 12px 18px;
    border-radius: var(--r-sm);
    margin-bottom: 16px;
    display: none;
    line-height: 1.5;
}
.form__feedback:not(:empty) { display: block; }
.form__feedback--error { background: var(--red-pale); color: var(--red); border: 1px solid rgba(224, 62, 62, 0.15); }
.form__feedback--success { background: var(--green-pale); color: var(--green); border: 1px solid rgba(45, 158, 90, 0.15); }

/* ==========================================================
   FOOTER — Dark contrasting footer (SideHub)
   ========================================================== */
.footer {
    padding: 60px 0 32px;
    background: var(--dark-bg);
    color: var(--dark-text);
}

.footer__top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 48px; }
.footer .nav__logo-icon { color: var(--accent); }
.footer .nav__logo-text { color: #fff; }
.footer .nav__logo-text span { color: var(--dark-muted); }
.footer__tagline { font-size: 14px; color: var(--dark-muted); margin-top: 12px; }

.footer__links { display: flex; gap: 28px; }
.footer__links a { font-size: 13px; color: var(--dark-muted); transition: color 0.3s ease; }
.footer__links a:hover { color: var(--accent); }

.footer__social { display: flex; gap: 16px; align-items: center; }
.footer__social-link {
    display: flex; align-items: center; justify-content: center;
    width: 38px; height: 38px;
    border-radius: 50%;
    border: 1px solid var(--dark-border);
    color: var(--dark-muted);
    transition: color 0.3s ease, border-color 0.3s ease, transform 0.25s ease, background 0.3s ease;
}
.footer__social-link:hover {
    color: #fff;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-2px);
}

.footer__bottom {
    display: flex; align-items: center; justify-content: space-between;
    padding-top: 24px;
    border-top: 1px solid var(--dark-border);
    flex-wrap: wrap; gap: 16px;
}

.footer__legal { display: flex; gap: 24px; }
.footer__legal a { font-size: 12px; color: var(--dark-muted); transition: color 0.3s ease; }
.footer__legal a:hover { color: var(--dark-text); }
.footer__copy { font-size: 12px; color: var(--dark-muted); }

/* ==========================================================
   REVEAL ANIMATIONS (Apple-smooth)
   ========================================================== */
.reveal-up {
    opacity: 0;
    transform: translateY(44px);
    transition: opacity 0.9s var(--ease-smooth), transform 0.9s var(--ease-smooth);
}
.reveal-up.revealed { opacity: 1; transform: translateY(0); }

/* ==========================================================
   RESPONSIVE
   ========================================================== */
@media (max-width: 1024px) {
    .problem__grid { grid-template-columns: 1fr; gap: 35px; }
    .process__timeline { grid-template-columns: 1fr; }
    .code-section__grid { grid-template-columns: repeat(2, 1fr); }
    .code-card:nth-child(1), .code-card:nth-child(4) { grid-column: span 1; }
    .contact__grid { grid-template-columns: 1fr; gap: 64px; }
    .concepts__grid { grid-template-columns: 1fr; }
    .difference__feature { grid-template-columns: 80px 1fr; gap: 24px; padding: 40px 0; }
    .difference__feature-number { font-size: 44px; }
    .projects__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1025px) {
    .problem__grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
        gap: 55px;
    }
    .problem__grid > *:first-child {
        grid-column: 1 / -1;
    }
}

@media (min-width: 1025px) {
    .problem__cards {
        grid-template-columns: 1fr;
        gap: 24px;
        align-items: start;
    }
}

@media (max-width: 768px) {
    .nav { width: calc(100% - 24px); top: 10px; }
    .nav__container { padding: 8px 10px 8px 18px; }

    .nav__links {
        position: fixed;
        inset: 0;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(40px);
        -webkit-backdrop-filter: blur(40px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 20px;
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s var(--ease);
        border-radius: 0;
    }
    .nav__links--open { opacity: 1; visibility: visible; }
    .nav__links .nav__link { font-size: 24px; padding: 12px 24px; }
    .nav__links .nav__link--cta { font-size: 16px; }
    .nav__burger { display: flex; }

    .hero { padding: 120px 0 80px; }
    .hero__badge { font-size: 12px; padding: 7px 16px; }

    .code-section__grid { grid-template-columns: 1fr; }

    .difference__feature { grid-template-columns: 1fr; gap: 8px; }
    .difference__feature-number { font-size: 32px; }
    .difference__title { margin-bottom: 48px; }

    .process__step-content { padding: 16px 20px 24px; }
    .process__step-marker { padding: 20px 20px 0; }
    .process__step-content h3 { font-size: 19px; }
    .process__step-content p { font-size: 14px; }

    .form-row { grid-template-columns: 1fr; }
    .contact__form { padding: 28px; }
    .contact__grid { gap: 48px; }
    .contact__note { flex-direction: column; gap: 12px; padding: 20px; }
    .contact__note-icon svg { width: 20px; height: 20px; }

    .code-block { padding: 20px 16px; overflow-x: auto; }
    .code-block__tag { font-size: 12px; }
    .code-block__content { font-size: 12px; word-break: break-word; overflow-wrap: break-word; }
    .code-block__comment { font-size: 11px; }
    .code-block__bar { gap: 6px; }

    .claim-window { background-size: cover; }
    .claim-window__content { padding: 60px var(--px); }

    .manifesto__content { padding: 0 8px; }
    .manifesto__text { font-size: 15px; }

    .faq__question { font-size: 15px; padding: 22px 0; }
    .faq__answer p { font-size: 14px; }
    .faq__item--active .faq__answer { max-height: 500px; }

    .code-card { padding: 24px; }
    .code-card h3 { font-size: 16px; }

    .project-card__info { padding: 16px; }
    .project-card__name { font-size: 17px; }
    .projects__grid { padding: 0; }

    .footer__top { flex-direction: column; gap: 24px; }
    .footer__links { flex-wrap: wrap; gap: 16px; }
    .footer__bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
    .footer__legal { flex-wrap: wrap; gap: 16px; }

    .hero__scroll-indicator { display: none; }

    .projects__grid { grid-template-columns: 1fr; }
    .concepts__grid { grid-template-columns: 1fr; }

    .concept-card__body { padding: 20px; }
    .concept-card__tagline { font-size: 18px; }

    .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }
    .back-to-top__ring { width: 42px; height: 42px; }
}

@media (max-width: 480px) {
    .hero__actions { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
    .btn--lg { padding: 14px 28px; font-size: 15px; }

    .hero__title { margin-bottom: 24px; }
    .hero__subtitle { margin: 0 auto 36px; }

    .contact__form { padding: 20px; }
    .contact__title { font-size: 26px; }

    .section-label { margin-bottom: 24px; }

    .problem__card { padding: 24px; }
    .problem__grid { gap: 40px; }

    .manifesto__badge { margin-bottom: 28px; }

    .footer { padding: 40px 0 24px; }
    .footer__top { margin-bottom: 32px; }
}

/* ---------- Selection ---------- */
::selection { background: var(--accent); color: #fff; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--off-white); }
::-webkit-scrollbar-thumb { background: #d0d0d8; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #aaaabc; }

/* ---------- Theme Toggle ---------- */
.nav__actions { display: flex; align-items: center; gap: 12px; z-index: 1001; }

.theme-toggle {
    width: 36px; height: 36px;
    border-radius: 0;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-light);
    transition: all 0.3s var(--ease);
    color: var(--text-body);
    position: relative;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); transform: scale(1.08); }

.theme-toggle__icon {
    width: 16px; height: 16px;
    position: absolute;
    transition: opacity 0.3s ease, transform 0.4s var(--ease);
}
.theme-toggle__icon--sun { opacity: 1; transform: rotate(0) scale(1); }
.theme-toggle__icon--moon { opacity: 0; transform: rotate(-90deg) scale(0.5); }

[data-theme="dark"] .theme-toggle__icon--sun { opacity: 0; transform: rotate(90deg) scale(0.5); }
[data-theme="dark"] .theme-toggle__icon--moon { opacity: 1; transform: rotate(0) scale(1); }

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 9999;
    width: 46px;
    height: 46px;
    border: none;
    border-radius: 50%;
    background: var(--dark-bg);
    color: var(--off-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(0.9);
    transition: opacity 0.35s ease, visibility 0.35s ease, transform 0.35s var(--ease), background 0.25s ease, box-shadow 0.25s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    padding: 0;
}
.back-to-top--visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.back-to-top:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
    transform: translateY(-2px) scale(1.06);
}
.back-to-top:active { transform: translateY(0) scale(0.96); }

/* Progress ring */
.back-to-top__ring {
    position: absolute;
    inset: 0;
    width: 46px;
    height: 46px;
    transform: rotate(-90deg);
}
.back-to-top__ring-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.12);
    stroke-width: 2.4;
}
.back-to-top__ring-fill {
    fill: none;
    stroke: var(--off-white);
    stroke-width: 2.4;
    stroke-linecap: round;
    /* circumference = 2 × π × 21 ≈ 131.95 */
    stroke-dasharray: 131.95;
    stroke-dashoffset: 131.95;
    transition: stroke-dashoffset 0.15s ease;
}
.back-to-top:hover .back-to-top__ring-fill {
    stroke: #fff;
}

/* Arrow icon over the ring */
.back-to-top__icon {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

[data-theme="dark"] .back-to-top {
    background: var(--glass-white-strong);
    color: var(--dark-text);
}
[data-theme="dark"] .back-to-top__ring-bg { stroke: rgba(0, 0, 0, 0.15); }
[data-theme="dark"] .back-to-top__ring-fill { stroke: var(--dark-text); }