:root {
    --bg-main: #080b12;
    --bg-section: #0d1320;
    --bg-elevated: #111827;
    --bg-card: #162033;
    --bg-footer: #06080d;
    --text-main: #f5f7fb;
    --text-soft: #cbd5e1;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --primary-deep: #1d4ed8;
    --secondary: #14b8a6;
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 24px;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.2);
    --shadow-card: 0 18px 44px rgba(0, 0, 0, 0.24);
    --shadow-cta: 0 14px 36px rgba(59, 130, 246, 0.18);
    --glass: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
    --container: min(1180px, calc(100vw - 40px));
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Inter", sans-serif;
    background: linear-gradient(180deg, #070a10 0%, #080b12 34%, #09111d 100%);
    color: var(--text-soft);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

h1,
h2,
h3 {
    margin: 0;
    font-family: "Archivo", sans-serif;
    color: var(--text-main);
}

.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: rgba(8, 11, 18, 0.72);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
    transition: background 180ms ease, border-color 180ms ease;
}

.main-nav.is-scrolled,
.site-header.is-scrolled {
    background: rgba(8, 11, 18, 0.92);
}

.nav-logo,
.brand {
    font-family: "Archivo", sans-serif;
    font-weight: 700;
    font-size: 1.35rem;
    color: var(--text-main);
    letter-spacing: -0.03em;
}

.nav-logo span,
.brand strong {
    color: var(--primary);
}

.nav-links,
.top-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a,
.top-nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: color 180ms ease;
}

.nav-links a:hover,
.nav-links a.is-active,
.top-nav a:hover {
    color: var(--text-main);
}

.nav-cta,
.button,
.btn-primary,
.btn-ghost,
.trade-btn,
.plan-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    padding: 14px 22px;
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 600;
    transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
    cursor: pointer;
}

.nav-cta,
.btn-primary,
.button-primary,
.trade-btn,
.plan-cta.highlight {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 10px 24px rgba(59, 130, 246, 0.22);
}

.nav-cta:hover,
.btn-primary:hover,
.button-primary:hover,
.trade-btn:hover,
.plan-cta.highlight:hover {
    transform: translateY(-1px);
    background: var(--primary-deep);
    box-shadow: var(--shadow-cta);
}

.btn-ghost,
.button-secondary,
.plan-cta {
    background: transparent;
    color: var(--text-main);
    border-color: rgba(148, 163, 184, 0.24);
}

.btn-ghost:hover,
.button-secondary:hover,
.plan-cta:hover {
    transform: translateY(-1px);
    border-color: rgba(96, 165, 250, 0.42);
    background: rgba(255, 255, 255, 0.02);
}

#hero {
    position: relative;
    min-height: 100svh;
    padding: 120px 24px 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-backdrop,
.hero-grid,
.hero-system-lines {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-backdrop {
    background:
        radial-gradient(circle at 50% 24%, rgba(59, 130, 246, 0.22), transparent 26%),
        radial-gradient(circle at 76% 42%, rgba(20, 184, 166, 0.14), transparent 22%),
        radial-gradient(circle at 18% 38%, rgba(59, 130, 246, 0.12), transparent 18%);
    filter: blur(8px);
}

.hero-grid {
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(circle at center, black 36%, transparent 80%);
    opacity: 0.75;
}

.hero-system-lines {
    background:
        linear-gradient(130deg, transparent 48%, rgba(59, 130, 246, 0.12) 49%, transparent 50%) center / 100% 100% no-repeat,
        linear-gradient(35deg, transparent 46%, rgba(20, 184, 166, 0.08) 47%, transparent 48%) center / 100% 100% no-repeat;
    opacity: 0.6;
}

.hero-inner,
.value-inner,
.how-inner,
.pricing-inner,
.brief-shell,
.site-header {
    width: var(--container);
    margin-inline: auto;
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(420px, 0.95fr);
    gap: 44px;
    align-items: center;
}

.hero-eyebrow,
.value-tag,
.tag,
.pricing-tag,
.cta-eyebrow,
.eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--primary);
}

.hero-eyebrow {
    margin-bottom: 24px;
}

.hero-h1 {
    font-size: clamp(3.2rem, 8vw, 7.5rem);
    line-height: 0.92;
    letter-spacing: -0.05em;
}

.hero-h1 .line2 {
    color: var(--primary);
}

.hero-sub,
.value-body,
.trade-desc,
.pricing-sub,
.cta-sub {
    font-size: clamp(1rem, 1.8vw, 1.2rem);
    line-height: 1.7;
    color: var(--text-soft);
}

.hero-sub {
    max-width: 660px;
    margin-top: 22px;
}

.hero-actions,
.cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.hero-proof {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 46px;
}

.proof-item {
    padding: 18px;
    border-radius: 18px;
    background: rgba(17, 24, 39, 0.64);
    border: 1px solid rgba(148, 163, 184, 0.12);
    box-shadow: var(--shadow-soft);
}

.proof-num {
    font-family: "Archivo", sans-serif;
    color: var(--text-main);
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1;
}

.proof-num em {
    font-style: normal;
    font-size: 0.36em;
    color: var(--primary);
    margin-left: 6px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.proof-label {
    margin-top: 10px;
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.hero-visual {
    position: relative;
}

.hero-machine {
    position: relative;
    height: 620px;
    border-radius: 30px;
    border: 1px solid rgba(148, 163, 184, 0.12);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01)),
        radial-gradient(circle at center, rgba(59, 130, 246, 0.18), transparent 35%),
        #0b1320;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.machine-glow {
    position: absolute;
    inset: 16%;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.16), transparent 60%);
    filter: blur(24px);
}

.machine-core,
.scene-core {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: "Archivo", sans-serif;
    color: var(--text-main);
    letter-spacing: 0.08em;
    background: radial-gradient(circle at top, rgba(59, 130, 246, 0.24), rgba(8, 11, 18, 0.96));
    border: 1px solid rgba(148, 163, 184, 0.18);
    z-index: 3;
}

.machine-ring,
.scene-orbit {
    position: absolute;
    left: 50%;
    top: 50%;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.ring-one {
    width: 220px;
    height: 220px;
}

.ring-two {
    width: 320px;
    height: 320px;
    border-color: rgba(20, 184, 166, 0.14);
}

.machine-node {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 18px rgba(59, 130, 246, 0.44);
    z-index: 2;
}

.node-one { left: 22%; top: 26%; }
.node-two { right: 20%; top: 22%; }
.node-three { left: 26%; bottom: 22%; }
.node-four { right: 24%; bottom: 20%; }

.machine-link,
.scene-wire {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.44), rgba(20, 184, 166, 0.26));
    transform-origin: left center;
    z-index: 1;
}

.link-one {
    left: 31%;
    top: 32%;
    width: 170px;
    transform: rotate(26deg);
}

.link-two {
    right: 30%;
    top: 32%;
    width: 170px;
    transform: rotate(154deg);
}

.link-three {
    left: 36%;
    bottom: 31%;
    width: 180px;
    transform: rotate(-20deg);
}

.machine-panel,
.scene-part,
.scene-chip,
.vm-float,
.vm-badge {
    position: absolute;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(148, 163, 184, 0.14);
    color: var(--text-main);
    font-size: 13px;
    z-index: 4;
}

.panel-one { left: 10%; top: 18%; }
.panel-two { right: 10%; top: 18%; }
.panel-three { left: 12%; bottom: 16%; }
.panel-four { right: 10%; bottom: 18%; }

.scroll-hint {
    position: absolute;
    left: 50%;
    bottom: 28px;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
    z-index: 2;
}

.scroll-hint span {
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.scroll-arrow {
    width: 24px;
    height: 40px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    position: relative;
}

.scroll-arrow::before {
    content: "";
    position: absolute;
    width: 4px;
    height: 8px;
    border-radius: 999px;
    background: var(--primary);
    left: 50%;
    top: 7px;
    transform: translateX(-50%);
    animation: scrollPulse 1.8s ease-in-out infinite;
}

#value,
#how,
#pricing,
#cta,
.brief-shell {
    padding: 110px 0;
}

.value-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.value-title {
    margin-top: 18px;
    font-size: clamp(2.6rem, 5vw, 5rem);
    line-height: 0.95;
    letter-spacing: -0.04em;
}

.value-title em,
.trade-title span,
.cta-title span,
.footer-logo span {
    color: var(--primary);
    font-style: normal;
}

.value-body {
    margin-top: 22px;
}

.value-checks {
    display: grid;
    gap: 14px;
    margin-top: 28px;
}

.value-checks li,
.trade-features li,
.plan-features li,
.brief-sidecard li {
    position: relative;
    padding-left: 22px;
}

.value-checks li::before,
.trade-features li::before,
.plan-features li::before,
.brief-sidecard li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.8em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--secondary);
    box-shadow: 0 0 14px rgba(20, 184, 166, 0.4);
}

.value-mockup {
    position: relative;
    min-height: 460px;
    border-radius: 28px;
    border: 1px solid rgba(148, 163, 184, 0.12);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01)),
        radial-gradient(circle at 70% 18%, rgba(59, 130, 246, 0.12), transparent 24%),
        #0f1725;
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.vm-badge {
    top: 22px;
    right: 20px;
    background: rgba(59, 130, 246, 0.16);
    color: var(--text-main);
}

.vm-frame {
    position: absolute;
    inset: 70px 28px 28px;
    border-radius: 22px;
    padding: 24px;
    background: rgba(8, 11, 18, 0.58);
    border: 1px solid rgba(148, 163, 184, 0.14);
}

.vm-topbar,
.vm-title,
.vm-line,
.vm-button {
    border-radius: 999px;
}

.vm-topbar {
    width: 32%;
    height: 12px;
    background: rgba(59, 130, 246, 0.34);
}

.vm-title {
    width: 58%;
    height: 24px;
    margin-top: 26px;
    background: rgba(245, 247, 251, 0.82);
}

.vm-line {
    margin-top: 16px;
    width: 78%;
    height: 12px;
    background: rgba(203, 213, 225, 0.14);
}

.vm-line.medium {
    width: 68%;
}

.vm-line.short {
    width: 44%;
}

.vm-button {
    margin-top: 24px;
    width: 170px;
    height: 44px;
    background: linear-gradient(135deg, rgba(29, 78, 216, 0.82), rgba(20, 184, 166, 0.72));
    border-radius: 14px;
}

.vm-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 26px;
}

.vm-chip-row span {
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(148, 163, 184, 0.12);
    font-size: 13px;
}

.float-a { left: 18px; top: 100px; }
.float-b { right: 24px; bottom: 96px; }
.float-c { left: 24px; bottom: 42px; }

.trades-section {
    padding: 14px 0 0;
}

.trades-header {
    width: var(--container);
    margin-inline: auto;
    text-align: center;
}

.trades-header h2,
.how-title,
.pricing-title,
.cta-title {
    margin-top: 18px;
    font-size: clamp(2.7rem, 5vw, 5.2rem);
    line-height: 0.95;
    letter-spacing: -0.04em;
}

.trades-header p,
.pricing-sub,
.cta-sub {
    max-width: 760px;
    margin: 18px auto 0;
}

.trade-slide {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 100svh;
    padding: 70px calc((100vw - var(--container)) / 2) 70px;
    border-top: 1px solid rgba(148, 163, 184, 0.08);
    overflow: hidden;
}

.trade-slide.reverse {
    flex-direction: row-reverse;
}

.trade-left,
.trade-right {
    width: 50%;
    position: relative;
    z-index: 1;
}

.trade-left {
    padding: 0 42px 0 0;
}

.trade-slide.reverse .trade-left {
    padding: 0 0 0 42px;
}

.trade-number {
    position: absolute;
    top: 50%;
    right: 2%;
    transform: translateY(-50%);
    font-family: "Archivo", sans-serif;
    font-size: min(19vw, 240px);
    line-height: 1;
    color: rgba(245, 247, 251, 0.04);
    pointer-events: none;
}

.trade-slide.reverse .trade-number {
    right: auto;
    left: 2%;
}

.trade-tag {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
    color: var(--text-main);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.trade-tag .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 14px rgba(59, 130, 246, 0.4);
}

.trade-title {
    font-size: clamp(3rem, 5vw, 5.4rem);
    line-height: 0.92;
    letter-spacing: -0.05em;
}

.trade-desc {
    max-width: 560px;
    margin-top: 22px;
}

.trade-features {
    display: grid;
    gap: 12px;
    margin-top: 26px;
}

.trade-btn {
    margin-top: 34px;
}

.trade-visual {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
}

.scene-shell {
    --progress: 0;
    width: min(100%, 560px);
    aspect-ratio: 1 / 1;
    border-radius: 30px;
    position: relative;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
        radial-gradient(circle at center, rgba(59, 130, 246, 0.16), transparent 34%),
        #0e1624;
    border: 1px solid rgba(148, 163, 184, 0.12);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.scene-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(circle at center, black 38%, transparent 85%);
}

.scene-center {
    position: absolute;
    inset: 50%;
    transform: translate(-50%, -50%);
    width: 360px;
    height: 360px;
}

.orbit-one {
    width: 210px;
    height: 210px;
}

.orbit-two {
    width: 320px;
    height: 320px;
    border-color: rgba(20, 184, 166, 0.14);
}

.scene-wire {
    left: 50%;
    top: 50%;
    width: 140px;
}

.wire-one {
    transform: translate(10px, -140px) rotate(-26deg);
}

.wire-two {
    transform: translate(60px, 54px) rotate(34deg);
}

.wire-three {
    transform: translate(-170px, 70px) rotate(-18deg);
}

.scene-part {
    transform:
        translate(
            calc(var(--x) * (0.4 + var(--progress) * 0.7)),
            calc(var(--y) * (0.4 + var(--progress) * 0.7))
        )
        rotate(calc(var(--r) * (0.2 + var(--progress) * 0.8)));
}

.part-one { left: 42%; top: 14%; --x: -120px; --y: -6px; --r: -10deg; }
.part-two { right: 14%; top: 22%; --x: 44px; --y: -34px; --r: 8deg; }
.part-three { left: 16%; top: 40%; --x: -54px; --y: 0px; --r: -12deg; }
.part-four { right: 12%; bottom: 22%; --x: 54px; --y: 42px; --r: 10deg; }
.part-five { left: 22%; bottom: 18%; --x: -46px; --y: 48px; --r: -6deg; }
.part-six { left: 40%; bottom: 10%; --x: 0px; --y: 46px; --r: 4deg; }

.scene-chip {
    font-size: 12px;
    color: var(--text-soft);
}

.chip-one { left: 16px; top: 20px; }
.chip-two { right: 18px; top: 50px; }
.chip-three { right: 28px; bottom: 20px; }

.system-electric .scene-shell,
.system-electric .hero-machine {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
        radial-gradient(circle at center, rgba(59, 130, 246, 0.18), transparent 34%),
        #0e1624;
}

.system-plumb .scene-shell {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
        radial-gradient(circle at center, rgba(20, 184, 166, 0.18), transparent 34%),
        #0c1722;
}

.system-hvac .scene-shell {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
        radial-gradient(circle at center, rgba(59, 130, 246, 0.2), transparent 34%),
        #131726;
}

.system-roof .scene-shell {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
        radial-gradient(circle at center, rgba(59, 130, 246, 0.15), transparent 34%),
        #151926;
}

.system-carp .scene-shell {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
        radial-gradient(circle at center, rgba(20, 184, 166, 0.16), transparent 34%),
        #101925;
}

.steps-grid,
.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 40px;
}

.step-card,
.plan-card,
.brief-sidecard,
.form-section,
.form-submit,
.success-panel {
    padding: 28px;
    border-radius: 22px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015)),
        rgba(8, 11, 18, 0.68);
    border: 1px solid rgba(148, 163, 184, 0.12);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(14px);
}

.step-num {
    color: var(--primary);
    font-family: "Archivo", sans-serif;
    font-size: 1.2rem;
    letter-spacing: 0.08em;
}

.step-title {
    margin-top: 18px;
    font-family: "Archivo", sans-serif;
    font-size: 1.7rem;
    color: var(--text-main);
}

.step-body {
    margin-top: 14px;
    color: var(--text-soft);
    line-height: 1.7;
}

.pricing-sub {
    margin-top: 18px;
}

.plan-card.featured {
    background:
        linear-gradient(135deg, rgba(29, 78, 216, 0.18), rgba(20, 184, 166, 0.14)),
        rgba(17, 24, 39, 0.82);
    border-color: rgba(96, 165, 250, 0.24);
}

.plan-badge {
    display: inline-block;
    margin-bottom: 18px;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.plan-name {
    font-family: "Archivo", sans-serif;
    font-size: 2rem;
    color: var(--text-main);
}

.plan-price {
    margin-top: 16px;
    font-family: "Archivo", sans-serif;
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    color: var(--text-main);
    line-height: 1;
}

.plan-price span {
    font-size: 0.4em;
    color: var(--primary);
    margin-left: 6px;
}

.plan-period {
    margin-top: 10px;
    color: var(--text-muted);
}

.plan-features {
    display: grid;
    gap: 12px;
    margin-top: 24px;
    margin-bottom: 28px;
}

#cta {
    position: relative;
    text-align: center;
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.16), transparent 34%);
    filter: blur(14px);
    pointer-events: none;
}

.cta-title {
    position: relative;
    z-index: 1;
}

.cta-sub,
.cta-note {
    position: relative;
    z-index: 1;
}

.cta-note {
    margin-top: 18px;
    color: var(--text-muted);
}

footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    padding: 34px 24px 44px;
    background: var(--bg-footer);
    border-top: 1px solid rgba(148, 163, 184, 0.08);
}

.footer-logo {
    font-family: "Archivo", sans-serif;
    font-size: 1.4rem;
    color: var(--text-main);
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-links a,
.footer-copy {
    color: var(--text-muted);
    font-size: 14px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 16px 0;
    background: rgba(8, 11, 18, 0.72);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.header-button {
    flex-shrink: 0;
}

.brief-page {
    background:
        linear-gradient(180deg, rgba(7, 16, 24, 0.74), rgba(8, 17, 27, 0.92)),
        url("img/contacbg.jpg") center center / cover no-repeat fixed,
        linear-gradient(180deg, #071018 0%, #08111b 100%);
    min-height: 100svh;
    position: relative;
}

.brief-page::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at top right, rgba(59, 130, 246, 0.18), transparent 24%),
        radial-gradient(circle at left center, rgba(20, 184, 166, 0.12), transparent 22%),
        linear-gradient(180deg, rgba(8, 11, 18, 0.18), rgba(8, 11, 18, 0.58));
}

.brief-shell {
    padding-top: 48px;
    position: relative;
    z-index: 1;
}

.brief-hero {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 22px;
    align-items: start;
    margin-top: 18px;
    padding: 34px;
    border-radius: 28px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015)),
        rgba(8, 11, 18, 0.54);
    border: 1px solid rgba(148, 163, 184, 0.14);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-card);
}

.brief-sidecard strong {
    display: block;
    margin-bottom: 12px;
    color: var(--text-main);
}

.brief-sidecard ul {
    display: grid;
    gap: 12px;
}

.brief-form {
    display: grid;
    gap: 20px;
    margin-top: 24px;
}

.brief-hero-note {
    margin-top: 18px;
    color: var(--text-muted);
    font-size: 15px;
}

.brief-hero-note strong {
    color: var(--text-main);
}

.form-section-head {
    margin-bottom: 24px;
}

.form-grid {
    display: grid;
    gap: 18px;
}

.form-grid.two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.full-span {
    grid-column: 1 / -1;
}

.top-gap {
    margin-top: 18px;
}

label {
    display: grid;
    gap: 10px;
    color: var(--text-main);
    font-size: 15px;
    font-weight: 600;
}

input,
select,
textarea {
    width: 100%;
    padding: 15px 16px;
    border-radius: 14px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(8, 11, 18, 0.62);
    color: var(--text-main);
    font: inherit;
    resize: vertical;
}

input::placeholder,
textarea::placeholder {
    color: rgba(148, 163, 184, 0.8);
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.chip-button,
.success-chip {
    padding: 11px 16px;
    border-radius: 999px;
    background: rgba(17, 24, 39, 0.66);
    border: 1px solid rgba(148, 163, 184, 0.14);
    color: var(--text-soft);
}

.chip-button.is-selected,
.chip-button:hover {
    background: rgba(59, 130, 246, 0.16);
    border-color: rgba(96, 165, 250, 0.34);
    color: var(--text-main);
}

.form-submit {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.success-chip {
    display: inline-flex;
    margin-top: 18px;
}

.reveal,
.reveal-left,
.reveal-right {
    opacity: 0;
    filter: blur(8px);
    transition: opacity 700ms ease, transform 700ms ease, filter 700ms ease;
}

.reveal {
    transform: translateY(34px);
}

.reveal-left {
    transform: translateX(-34px);
}

.reveal-right {
    transform: translateX(34px);
}

.reveal.visible,
.reveal-left.visible,
.reveal-right.visible {
    opacity: 1;
    transform: translate(0, 0);
    filter: blur(0);
}

.delay-1 { transition-delay: 100ms; }
.delay-2 { transition-delay: 200ms; }
.delay-3 { transition-delay: 300ms; }

@keyframes scrollPulse {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    80% { opacity: 0; transform: translateX(-50%) translateY(16px); }
    100% { opacity: 0; }
}

@media (max-width: 1100px) {
    .hero-inner,
    .value-inner,
    .brief-hero {
        grid-template-columns: 1fr;
    }

    .hero-proof,
    .steps-grid,
    .plans-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .trade-slide,
    .trade-slide.reverse {
        flex-direction: column;
        padding-left: 20px;
        padding-right: 20px;
    }

    .trade-left,
    .trade-right {
        width: 100%;
    }

    .trade-left,
    .trade-slide.reverse .trade-left {
        padding: 0;
    }

    .trade-number {
        right: 20px;
        top: 60px;
        transform: none;
    }
}

@media (max-width: 820px) {
    .main-nav,
    .site-header {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-links,
    .top-nav {
        width: 100%;
        justify-content: center;
        gap: 16px;
    }

    .hero-proof,
    .steps-grid,
    .plans-grid,
    .form-grid.two-col,
    .form-submit {
        grid-template-columns: 1fr;
        flex-direction: column;
    }

    .hero-actions .btn-primary,
    .hero-actions .btn-ghost,
    .cta-actions .btn-primary,
    .cta-actions .btn-ghost,
    .header-button,
    .form-submit .button {
        width: 100%;
    }
}

@media (max-width: 560px) {
    .hero-h1,
    .trade-title,
    .trades-header h2,
    .how-title,
    .pricing-title,
    .cta-title,
    .value-title {
        letter-spacing: -0.03em;
    }

    .hero-machine,
    .value-mockup,
    .scene-shell {
        min-height: 420px;
        height: auto;
    }

    .brief-hero {
        padding: 22px;
        border-radius: 22px;
    }

    footer {
        flex-direction: column;
        align-items: flex-start;
    }
}