/* ═══════════════════════════════════════════
   Тёплый Расчёт — Modern Redesign
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
    --c-primary: #2563eb;
    --c-primary-light: #60a5fa;
    --c-primary-dark: #1d4ed8;
    --c-accent: #f97316;
    --c-accent-light: #fb923c;
    --c-accent-dark: #ea580c;
    --c-bg: #f0f4f8;
    --c-white: #ffffff;
    --c-text: #0f172a;
    --c-text-muted: #64748b;
    --c-border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
    --shadow-md: 0 10px 25px -5px rgba(0,0,0,.08), 0 4px 10px -4px rgba(0,0,0,.04);
    --shadow-lg: 0 20px 50px -12px rgba(0,0,0,.15);
    --shadow-glow: 0 0 40px rgba(37,99,235,.15);
    --radius: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --max-w: 1240px;
    --transition: .3s cubic-bezier(.4,0,.2,1);
    --transition-fast: .15s ease;
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #1d4ed8 50%, #1e3a8a 100%);
    --gradient-accent: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    --gradient-hero: linear-gradient(160deg, #0f172a 0%, #1e3a8a 40%, #1d4ed8 70%, #2563eb 100%);
    --glass: rgba(255,255,255,.08);
    --glass-border: rgba(255,255,255,.12);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--c-text);
    background: var(--c-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; border: none; outline: none; }
button { cursor: pointer; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--c-bg); }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ─── SELECTION ─── */
::selection { background: rgba(37,99,235,.2); color: var(--c-primary-dark); }

/* ─── BUTTONS ─── */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 10px;
    padding: 14px 32px; border-radius: 12px; font-weight: 600; font-size: .95rem;
    transition: all var(--transition); white-space: nowrap; position: relative;
    letter-spacing: -.01em;
}
.btn-accent {
    background: var(--gradient-accent); color: #fff;
    box-shadow: 0 4px 15px rgba(249,115,22,.3);
}
.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(249,115,22,.4);
    filter: brightness(1.05);
}
.btn-accent:active { transform: translateY(0); }
.btn-outline {
    background: var(--glass); color: #fff;
    border: 1.5px solid var(--glass-border);
    backdrop-filter: blur(10px);
}
.btn-outline:hover {
    background: rgba(255,255,255,.15); border-color: rgba(255,255,255,.25);
    transform: translateY(-2px);
}
.btn-white {
    background: var(--c-white); color: var(--c-primary); border: 1px solid var(--c-border);
    box-shadow: var(--shadow-sm);
}
.btn-white:hover { background: #f8fafc; box-shadow: var(--shadow); transform: translateY(-1px); }
.btn-sm { padding: 10px 22px; font-size: .85rem; border-radius: 10px; }
.btn-lg { padding: 18px 40px; font-size: 1.05rem; border-radius: 14px; }

/* ─── HEADER ─── */
.header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(226,232,240,.6);
    transition: all var(--transition);
}
.header.scrolled {
    box-shadow: 0 4px 30px rgba(0,0,0,.08);
}
.header-top {
    display: flex; justify-content: space-between; align-items: center;
    padding: 8px 0; border-bottom: 1px solid rgba(226,232,240,.5);
    font-size: .78rem; color: var(--c-text-muted);
}
.header-top a {
    transition: color var(--transition-fast);
}
.header-top a:hover { color: var(--c-primary); }
.header-main {
    display: flex; justify-content: space-between; align-items: center; padding: 14px 0;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon {
    font-size: 2.2rem;
    filter: drop-shadow(0 2px 8px rgba(249,115,22,.3));
}
.logo-text { font-size: 1.3rem; font-weight: 800; color: var(--c-primary); line-height: 1.2; letter-spacing: -.02em; }
.logo-slogan { font-size: .72rem; color: var(--c-text-muted); font-weight: 500; letter-spacing: .02em; }
.header-contact { display: flex; align-items: center; gap: 24px; }
.header-phone {
    font-size: 1.2rem; font-weight: 700; color: var(--c-text);
    transition: color var(--transition-fast);
}
.header-phone:hover { color: var(--c-primary); }
.header-hours { font-size: .72rem; color: var(--c-text-muted); font-weight: 500; }

/* ─── NAV ─── */
.nav { border-top: 1px solid rgba(226,232,240,.4); }
.nav-list { display: flex; align-items: center; gap: 2px; list-style: none; padding: 6px 0; }
.nav-link {
    display: block; padding: 10px 16px; border-radius: 10px; font-size: .9rem; font-weight: 500;
    transition: all var(--transition-fast); color: var(--c-text-muted);
    position: relative;
}
.nav-link:hover { background: rgba(37,99,235,.06); color: var(--c-primary); }
.nav-link.active { background: rgba(37,99,235,.08); color: var(--c-primary); font-weight: 600; }

/* Dropdown */
.dropdown { position: relative; }
.dropdown::after {
    content: ''; position: absolute; top: 100%; left: 0; right: 0; height: 12px;
}
.dropdown-menu {
    position: absolute; left: 0; top: 100%; margin-top: 8px; background: var(--c-white);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: 10px;
    min-width: 300px; opacity: 0; visibility: hidden; transition: all .2s ease; pointer-events: none;
    border: 1px solid var(--c-border);
    transform: translateY(8px);
}
.dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0); }
.dropdown-item {
    display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: 12px;
    font-size: .88rem; transition: all var(--transition-fast); font-weight: 500;
}
.dropdown-item:hover { background: rgba(37,99,235,.06); color: var(--c-primary); transform: translateX(4px); }

/* Burger */
.burger { display: none; flex-direction: column; gap: 6px; padding: 8px; background: none; }
.burger span { display: block; width: 24px; height: 2.5px; background: var(--c-text); border-radius: 2px; transition: all var(--transition); }
.burger.active span:nth-child(1) { transform: translateY(8.5px) rotate(45deg); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: translateY(-8.5px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
    display: none; background: var(--c-white);
    border-top: 1px solid var(--c-border);
    padding: 20px 24px;
    max-height: 0; overflow: hidden;
    transition: max-height .4s ease, padding .3s ease;
}
.mobile-menu.open { display: block; max-height: 600px; padding: 20px 24px; }
.mobile-menu a {
    display: block; padding: 12px 0; font-size: .95rem;
    border-bottom: 1px solid rgba(226,232,240,.5);
    transition: color var(--transition-fast); font-weight: 500;
}
.mobile-menu a:hover { color: var(--c-primary); }
.mobile-menu .mobile-phone {
    display: block; text-align: center;
    background: var(--gradient-accent); color: #fff;
    padding: 16px; border-radius: var(--radius); margin-top: 16px;
    font-weight: 700; font-size: 1rem;
    box-shadow: 0 4px 15px rgba(249,115,22,.3);
    border-bottom: none;
}

/* ─── HERO ─── */
.hero {
    background: var(--gradient-hero);
    color: #fff; padding: 100px 0 120px; position: relative; overflow: hidden;
    min-height: 550px; display: flex; align-items: center;
}
.hero::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 600px 600px at 85% 15%, rgba(96,165,250,.15) 0%, transparent 70%),
        radial-gradient(ellipse 400px 400px at 10% 80%, rgba(249,115,22,.08) 0%, transparent 70%);
}
.hero::after {
    content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 80px;
    background: linear-gradient(to top, var(--c-bg), transparent);
}
.hero-content { position: relative; z-index: 2; max-width: 680px; }
.hero h1 {
    font-size: clamp(2rem, 4.5vw, 3.2rem); font-weight: 900; line-height: 1.15;
    margin-bottom: 24px; letter-spacing: -.03em;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,.8) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p { font-size: 1.15rem; color: rgba(255,255,255,.75); margin-bottom: 36px; line-height: 1.7; }
.hero-buttons { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-badges {
    display: flex; flex-wrap: wrap; gap: 28px; margin-top: 48px;
    font-size: .88rem; color: rgba(255,255,255,.65);
}
.hero-badges span {
    display: flex; align-items: center; gap: 8px;
    background: rgba(255,255,255,.06); padding: 8px 16px; border-radius: 10px;
    border: 1px solid rgba(255,255,255,.08);
    backdrop-filter: blur(10px);
    transition: all var(--transition);
}
.hero-badges span:hover {
    background: rgba(255,255,255,.1);
    color: rgba(255,255,255,.9);
}

/* Hero floating shapes */
.hero-shapes {
    position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none; overflow: hidden;
}
.hero-shape {
    position: absolute; border-radius: 50%; opacity: .06;
    background: #60a5fa;
    animation: float 20s ease-in-out infinite;
}
.hero-shape:nth-child(1) { width: 400px; height: 400px; top: -100px; right: -80px; animation-delay: 0s; }
.hero-shape:nth-child(2) { width: 250px; height: 250px; bottom: 50px; right: 200px; animation-delay: -5s; background: #f97316; }
.hero-shape:nth-child(3) { width: 180px; height: 180px; top: 30%; left: 60%; animation-delay: -10s; }

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(30px, -30px) rotate(5deg); }
    50% { transform: translate(-20px, 20px) rotate(-3deg); }
    75% { transform: translate(15px, -15px) rotate(2deg); }
}

/* ─── SECTIONS ─── */
.section { padding: 80px 0; }
.section-white { background: var(--c-white); }
.section-gray { background: var(--c-bg); }
.section-dark { background: var(--c-primary-dark); color: #fff; }
.section-title {
    font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; text-align: center;
    margin-bottom: 12px; color: var(--c-text); letter-spacing: -.03em;
}
.section-subtitle {
    text-align: center; color: var(--c-text-muted); max-width: 560px;
    margin: 0 auto 48px; font-size: 1.05rem; line-height: 1.6;
}

/* Section decorative line */
.section-title::after {
    content: ''; display: block; width: 48px; height: 4px;
    background: var(--gradient-accent); border-radius: 2px;
    margin: 16px auto 0;
}

/* ─── CARDS ─── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.card {
    background: var(--c-white); border: 1px solid rgba(226,232,240,.8);
    border-radius: var(--radius-lg); padding: 28px;
    transition: all var(--transition); position: relative; overflow: hidden;
}
.card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: var(--gradient-primary); opacity: 0;
    transition: opacity var(--transition);
}
.card:hover {
    box-shadow: var(--shadow-lg); border-color: transparent;
    transform: translateY(-6px);
}
.card:hover::before { opacity: 1; }
.card-icon {
    font-size: 2.8rem; margin-bottom: 16px;
    display: inline-flex; align-items: center; justify-content: center;
    width: 64px; height: 64px; border-radius: 16px;
    background: linear-gradient(135deg, rgba(37,99,235,.08), rgba(37,99,235,.03));
}
.card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; letter-spacing: -.01em; }
.card-text { font-size: .88rem; color: var(--c-text-muted); line-height: 1.6; }
.card-price {
    font-size: .9rem; font-weight: 700; color: var(--c-accent); margin-top: 12px;
    display: inline-flex; align-items: center; gap: 4px;
}

/* ─── ADVANTAGES ─── */
.adv-card {
    background: var(--c-white); border-radius: var(--radius-lg);
    padding: 32px; box-shadow: var(--shadow-sm);
    border: 1px solid rgba(226,232,240,.6);
    transition: all var(--transition);
    position: relative; overflow: hidden;
}
.adv-card::after {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
    background: var(--gradient-accent); transform: scaleX(0);
    transition: transform var(--transition); transform-origin: left;
}
.adv-card:hover {
    box-shadow: var(--shadow-md); transform: translateY(-4px);
}
.adv-card:hover::after { transform: scaleX(1); }
.adv-icon {
    font-size: 2rem; margin-bottom: 12px;
    display: inline-flex; align-items: center; justify-content: center;
    width: 52px; height: 52px; border-radius: 14px;
    background: linear-gradient(135deg, rgba(249,115,22,.1), rgba(249,115,22,.03));
}
.adv-title { font-weight: 700; margin-bottom: 6px; font-size: 1.05rem; letter-spacing: -.01em; }
.adv-text { font-size: .88rem; color: var(--c-text-muted); line-height: 1.6; }

/* ─── STEPS ─── */
.steps-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; text-align: center; }
.step-icon {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, rgba(37,99,235,.1), rgba(37,99,235,.04));
    color: var(--c-primary); border-radius: 18px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; margin: 0 auto 16px;
    transition: all var(--transition);
    position: relative;
}
.step-icon::after {
    content: ''; position: absolute; inset: -4px;
    border-radius: 22px; border: 2px dashed rgba(37,99,235,.15);
    transition: all var(--transition);
}
.step-title { font-weight: 700; font-size: .92rem; margin-bottom: 6px; }
.step-desc { font-size: .82rem; color: var(--c-text-muted); line-height: 1.5; }

/* Step connectors between items */
.steps-grid > div { position: relative; }
.steps-grid > div:not(:last-child)::after {
    content: '→'; position: absolute; right: -16px; top: 28px;
    color: rgba(37,99,235,.25); font-size: 1.2rem;
}

/* ─── ABOUT (SEO text) ─── */
.about-text { max-width: 800px; margin: 0 auto; }
.about-text p { margin-bottom: 18px; color: #475569; font-size: 1.02rem; line-height: 1.8; }
.about-text strong { color: var(--c-text); font-weight: 600; }

/* ─── FAQ ─── */
.faq-list { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: var(--c-white); border-radius: var(--radius);
    overflow: hidden; border: 1px solid rgba(226,232,240,.6);
    transition: all var(--transition);
}
.faq-item:hover { border-color: rgba(37,99,235,.15); }
.faq-q {
    display: flex; justify-content: space-between; align-items: center;
    padding: 18px 24px; cursor: pointer; font-weight: 600; font-size: .95rem;
    transition: all var(--transition-fast); color: var(--c-text);
}
.faq-q:hover { color: var(--c-primary); }
.faq-arrow {
    transition: transform .3s ease; color: var(--c-text-muted); font-size: .7rem;
    width: 28px; height: 28px; display: flex; align-items: center; justify-content: center;
    border-radius: 8px; background: rgba(37,99,235,.05);
    flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); background: rgba(37,99,235,.1); color: var(--c-primary); }
.faq-a { padding: 0 24px 20px; font-size: .9rem; color: var(--c-text-muted); display: none; line-height: 1.7; }
.faq-item.open .faq-a { display: block; }

/* ─── CTA ─── */
.cta {
    background: var(--gradient-hero);
    color: #fff; text-align: center; padding: 80px 0; position: relative; overflow: hidden;
}
.cta::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 500px 500px at 20% 50%, rgba(249,115,22,.1) 0%, transparent 70%),
        radial-gradient(ellipse 400px 400px at 80% 30%, rgba(96,165,250,.12) 0%, transparent 70%);
}
.cta > .container { position: relative; z-index: 1; }
.cta h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 900; margin-bottom: 14px;
    letter-spacing: -.03em;
}
.cta p { color: rgba(255,255,255,.7); margin-bottom: 32px; font-size: 1.1rem; }
.cta-buttons { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ─── FOOTER ─── */
.footer { background: #0c1222; color: #8b99af; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 48px; padding: 56px 0; }
.footer h4 { color: #e2e8f0; font-size: .9rem; margin-bottom: 20px; font-weight: 700; letter-spacing: .02em; text-transform: uppercase; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .logo-icon { font-size: 1.6rem; }
.footer-brand span { font-weight: 800; color: #e2e8f0; font-size: 1.15rem; letter-spacing: -.02em; }
.footer p { font-size: .88rem; margin-bottom: 16px; line-height: 1.7; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 10px; }
.footer a { font-size: .88rem; transition: all var(--transition-fast); }
.footer a:hover { color: #e2e8f0; transform: translateX(2px); display: inline-block; }
.footer-phone { font-size: 1.25rem; font-weight: 700; color: #e2e8f0; }
.footer-social { display: flex; gap: 10px; margin-top: 20px; }
.footer-social a {
    width: 40px; height: 40px; background: rgba(255,255,255,.06); border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: .75rem; font-weight: 700; color: #8b99af;
    transition: all var(--transition); border: 1px solid rgba(255,255,255,.06);
}
.footer-social a:hover {
    background: var(--c-primary); color: #fff; border-color: transparent;
    transform: translateY(-2px); box-shadow: 0 4px 15px rgba(37,99,235,.3);
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.06); padding: 20px 0;
    display: flex; justify-content: space-between; align-items: center;
    font-size: .78rem; flex-wrap: wrap; gap: 12px;
}
.footer-bottom a:hover { color: #cbd5e1; }

/* ─── MODAL ─── */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(15,23,42,.6);
    backdrop-filter: blur(8px); z-index: 200;
    display: none; align-items: center; justify-content: center; padding: 20px;
}
.modal-overlay.show { display: flex; }
.modal {
    background: var(--c-white); border-radius: var(--radius-xl); max-width: 460px; width: 100%;
    padding: 40px; position: relative; animation: modalIn .3s ease;
    box-shadow: var(--shadow-lg);
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(24px) scale(.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
    position: absolute; top: 16px; right: 18px; font-size: 1.5rem;
    color: var(--c-text-muted); background: none;
    width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
    border-radius: 10px; transition: all var(--transition-fast);
}
.modal-close:hover { background: rgba(37,99,235,.06); color: var(--c-text); }
.modal h3 { font-size: 1.4rem; margin-bottom: 8px; font-weight: 800; letter-spacing: -.02em; }
.modal p { font-size: .9rem; color: var(--c-text-muted); margin-bottom: 24px; }

/* ─── FORMS ─── */
.form-group { margin-bottom: 16px; }
.form-input {
    width: 100%; padding: 14px 18px; border: 1.5px solid var(--c-border);
    border-radius: 12px; font-size: .9rem; transition: all var(--transition);
    background: var(--c-bg);
}
.form-input:focus {
    border-color: var(--c-primary-light);
    box-shadow: 0 0 0 4px rgba(37,99,235,.1);
    background: var(--c-white);
}
.form-input::placeholder { color: #94a3b8; }
.form-check { display: flex; align-items: flex-start; gap: 10px; font-size: .8rem; color: var(--c-text-muted); margin-bottom: 20px; }
.form-check input { margin-top: 3px; accent-color: var(--c-primary); }

/* ─── SERVICE DETAIL ─── */
.service-hero {
    background: var(--gradient-hero); color: #fff; padding: 80px 0; position: relative; overflow: hidden;
}
.service-hero::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse 600px 400px at 80% 20%, rgba(96,165,250,.12) 0%, transparent 70%);
}
.service-hero > .container { position: relative; z-index: 1; }
.breadcrumb { font-size: .82rem; color: rgba(255,255,255,.5); margin-bottom: 24px; }
.breadcrumb a { color: rgba(255,255,255,.7); transition: color var(--transition-fast); }
.breadcrumb a:hover { color: #fff; }
.service-icon { font-size: 3.5rem; margin-bottom: 16px; }
.service-hero h1 {
    font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 900; margin-bottom: 16px;
    letter-spacing: -.03em;
}
.service-hero p { color: rgba(255,255,255,.75); max-width: 580px; margin-bottom: 24px; line-height: 1.7; }
.service-price {
    background: rgba(255,255,255,.1); padding: 12px 24px; border-radius: var(--radius);
    font-weight: 700; font-size: 1.1rem; display: inline-block;
    border: 1px solid rgba(255,255,255,.1);
    backdrop-filter: blur(10px);
}

/* ─── CALCULATOR ─── */
.calc-app {
    background: var(--c-white); border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md); padding: 40px;
    border: 1px solid rgba(226,232,240,.6);
}
.calc-room {
    display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
    background: var(--c-bg); padding: 14px 18px; border-radius: var(--radius);
    margin-bottom: 10px; border: 1px solid rgba(226,232,240,.5);
    transition: border-color var(--transition-fast);
}
.calc-room:focus-within { border-color: rgba(37,99,235,.2); }
.calc-room input {
    padding: 10px 14px; border: 1.5px solid var(--c-border); border-radius: 10px;
    font-size: .88rem; transition: all var(--transition); background: var(--c-white);
}
.calc-room input:focus { border-color: var(--c-primary-light); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.calc-room .name-input { flex: 1; min-width: 140px; }
.calc-room .area-input { width: 90px; }
.calc-room .del-btn {
    background: none; color: #ef4444; font-size: 1.3rem; padding: 6px 10px;
    border-radius: 8px; transition: all var(--transition-fast);
}
.calc-room .del-btn:hover { background: rgba(239,68,68,.08); }
.calc-params { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 18px; margin: 24px 0; }
.calc-params label { font-size: .85rem; font-weight: 600; margin-bottom: 6px; display: block; }
.calc-params select, .calc-params input[type=number] {
    width: 100%; padding: 12px 14px; border: 1.5px solid var(--c-border);
    border-radius: 10px; font-size: .88rem; background: var(--c-bg);
    transition: all var(--transition);
}
.calc-params select:focus, .calc-params input[type=number]:focus {
    border-color: var(--c-primary-light); box-shadow: 0 0 0 3px rgba(37,99,235,.1);
    background: var(--c-white);
}
.calc-params .hint { font-size: .75rem; color: var(--c-text-muted); margin-top: 4px; }
.calc-options { display: flex; flex-wrap: wrap; gap: 18px; margin: 20px 0; }
.calc-options label {
    display: flex; align-items: center; gap: 8px; font-size: .88rem;
    padding: 10px 16px; background: var(--c-bg); border-radius: 10px;
    border: 1.5px solid var(--c-border); cursor: pointer;
    transition: all var(--transition);
}
.calc-options label:has(input:checked) {
    border-color: rgba(37,99,235,.3); background: rgba(37,99,235,.04);
}
.calc-options input { accent-color: var(--c-primary); }
.calc-result {
    margin-top: 32px; background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
    border: 1px solid #bbf7d0; border-radius: var(--radius-xl); padding: 32px;
}
.calc-result h3 { font-size: 1.25rem; color: #166534; margin-bottom: 20px; font-weight: 800; }
.calc-table { width: 100%; border-collapse: collapse; font-size: .88rem; margin-bottom: 24px; }
.calc-table th {
    text-align: left; padding: 10px; border-bottom: 2px solid #d1fae5;
    color: #166534; font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em;
}
.calc-table td { padding: 10px; border-bottom: 1px solid #e2e8f0; }
.calc-table tfoot td { font-weight: 700; border-top: 2px solid #d1fae5; color: #166534; }
.calc-volume { background: #fff; border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.calc-volume .label { font-size: .85rem; color: var(--c-text-muted); }
.calc-volume .value { font-size: 2rem; font-weight: 900; color: var(--c-primary); letter-spacing: -.03em; }
.calc-prices { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.calc-price-card { background: #fff; border-radius: var(--radius); padding: 18px; }
.calc-price-card .label { font-size: .8rem; color: var(--c-text-muted); font-weight: 500; }
.calc-price-card .value { font-size: 1.15rem; font-weight: 700; letter-spacing: -.01em; }
.calc-price-card.total { background: linear-gradient(135deg, #fff7ed, #fff1e6); border: 1px solid #fed7aa; }
.calc-price-card.total .label { color: var(--c-accent); font-weight: 600; }
.calc-price-card.total .value { color: var(--c-accent-dark); font-size: 1.4rem; font-weight: 800; }
.calc-disclaimer { font-size: .78rem; color: var(--c-text-muted); margin: 14px 0; line-height: 1.6; }

/* ─── BLOG ─── */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 28px; }
.blog-card {
    background: var(--c-white); border: 1px solid rgba(226,232,240,.6);
    border-radius: var(--radius-lg); overflow: hidden;
    transition: all var(--transition);
}
.blog-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); border-color: transparent; }
.blog-card-img { height: 220px; background: #e2e8f0; overflow: hidden; position: relative; }
.blog-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.blog-card:hover .blog-card-img img { transform: scale(1.08); }
.blog-card-body { padding: 24px; }
.blog-card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; letter-spacing: -.01em; }
.blog-card-excerpt { font-size: .88rem; color: var(--c-text-muted); line-height: 1.6; }
.blog-card-date { font-size: .78rem; color: var(--c-text-muted); margin-top: 14px; }
.blog-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.tag {
    background: rgba(37,99,235,.06); color: var(--c-primary);
    padding: 4px 14px; border-radius: 20px; font-size: .78rem; font-weight: 500;
    transition: all var(--transition-fast);
}
.tag:hover { background: rgba(37,99,235,.12); }
.article-content { max-width: 740px; margin: 0 auto; }
.article-content p { margin-bottom: 18px; color: #475569; line-height: 1.8; }

/* ─── GALLERY ─── */
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.gallery-item {
    aspect-ratio: 1; border-radius: var(--radius-lg); overflow: hidden;
    background: #e2e8f0; cursor: pointer; position: relative;
}
.gallery-item::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,.3), transparent);
    opacity: 0; transition: opacity var(--transition);
}
.gallery-item:hover::after { opacity: 1; }
.gallery-item img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform .5s ease;
}
.gallery-item:hover img { transform: scale(1.1); }

/* ─── CONTACTS ─── */
.contacts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
.contact-card {
    background: var(--c-white); border-radius: var(--radius-xl);
    padding: 36px; box-shadow: var(--shadow-sm);
    border: 1px solid rgba(226,232,240,.6);
}
.contact-row { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 20px; }
.contact-icon {
    font-size: 1.4rem; width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(37,99,235,.06); border-radius: 14px; flex-shrink: 0;
}
.contact-label { font-size: .78rem; color: var(--c-text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: .03em; margin-bottom: 2px; }
.contact-value { font-weight: 600; font-size: 1.02rem; }
.contact-value a { color: var(--c-primary); transition: color var(--transition-fast); }
.contact-value a:hover { color: var(--c-accent); }

/* ─── LEGAL ─── */
.legal-content { max-width: 740px; margin: 0 auto; }
.legal-content p { margin-bottom: 16px; color: #475569; line-height: 1.8; }

/* ─── COOKIE ─── */
.cookie-bar {
    position: fixed; bottom: 0; left: 0; right: 0;
    background: rgba(12,18,34,.95); backdrop-filter: blur(20px); color: #fff;
    padding: 16px 24px; z-index: 300; display: none; font-size: .88rem;
    border-top: 1px solid rgba(255,255,255,.06);
}
.cookie-bar.show { display: block; }
.cookie-bar .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.cookie-bar a { color: #93c5fd; text-decoration: underline; }

/* ─── ANIMATIONS ─── */
.fade-in { animation: fadeIn .6s ease-out both; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

/* Scroll reveal */
.reveal {
    opacity: 0; transform: translateY(32px);
    transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
    opacity: 1; transform: translateY(0);
}
.reveal-left {
    opacity: 0; transform: translateX(-32px);
    transition: opacity .6s ease, transform .6s ease;
}
.reveal-left.visible {
    opacity: 1; transform: translateX(0);
}
.reveal-right {
    opacity: 0; transform: translateX(32px);
    transition: opacity .6s ease, transform .6s ease;
}
.reveal-right.visible {
    opacity: 1; transform: translateX(0);
}

/* Stagger children */
.stagger-children > * {
    opacity: 0; transform: translateY(20px);
    transition: opacity .5s ease, transform .5s ease;
}
.stagger-children.visible > *:nth-child(1) { transition-delay: 0s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: .08s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: .16s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: .24s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: .32s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: .4s; }
.stagger-children.visible > * {
    opacity: 1; transform: translateY(0);
}

/* Pulse for CTA buttons */
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 4px 15px rgba(249,115,22,.3); }
    50% { box-shadow: 0 4px 30px rgba(249,115,22,.5); }
}
.btn-accent.pulse { animation: pulse-glow 2s ease-in-out infinite; }

/* Counter animation */
.counter { display: inline-block; }

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: repeat(3, 1fr); }
    .steps-grid > div:not(:last-child)::after { display: none; }
}
@media (max-width: 768px) {
    .header-top { display: none; }
    .burger { display: flex; }
    .nav { display: none; }
    .mobile-menu.open { display: block; }
    .header-contact { display: none; }
    .hero { padding: 60px 0 80px; min-height: auto; }
    .section { padding: 56px 0; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .contacts-grid { grid-template-columns: 1fr; }
    .calc-params { grid-template-columns: 1fr; }
    .calc-prices { grid-template-columns: 1fr; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn { width: 100%; }
    .hero-badges { gap: 12px; }
    .hero-badges span { font-size: .8rem; padding: 6px 12px; }
    .cta { padding: 56px 0; }
    .calc-app { padding: 24px; }
}
@media (max-width: 480px) {
    .blog-grid { grid-template-columns: 1fr; }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: 1fr; }
    .section { padding: 40px 0; }
    .hero { padding: 48px 0 64px; }
    .hero h1 { font-size: 1.7rem; }
}