/* ==========================================================================
   main.css — Global styles: tokens, reset, typography, layout, header,
   aside menu, footer, floating buttons
   ========================================================================== */

/* --- Design Tokens --- */
:root {
    --color-primary: #c0392b;
    --color-primary-dark: #a93226;
    --color-primary-light: #fef2f2;
    --color-secondary: #1a1a2e;
    --color-dark: #1a1a2e;
    --color-card-bg: #eff6ff;
    --color-text: #374151;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;
    --color-bg: #fff;
    --color-bg-alt: #f8fafc;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    --color-success: #22c55e;
    --color-white: #fff;

    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --container-max: 1200px;
    --container-pad: 24px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 100px;
    --shadow-sm: 0 1px 8px rgba(0,0,0,.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,.1);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
    --transition: .2s ease;

    /* z-index шкала (фаза 17.2) — единая иерархия чтобы не было войны 999 vs 1000 vs 2000 */
    --z-header:       100;
    --z-sticky-sub:   200;
    --z-overlay:      900;
    --z-aside:       1000;
    --z-modal:       2000;
    --z-toast:       3000;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input, textarea, select {
    font: inherit;
}

svg {
    display: block;
    fill: currentColor;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.25;
    font-weight: 700;
    color: var(--color-secondary);
}

h1 { font-size: clamp(30px, 4.5vw, 52px); }
h2 { font-size: clamp(24px, 3vw, 38px); }
h3 { font-size: clamp(18px, 2vw, 22px); font-weight: 600; }
h4 { font-size: 17px; font-weight: 600; }

p + p { margin-top: 16px; }

strong { font-weight: 600; }

/* --- Layout --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-pad);
}

.section {
    padding: 88px 0;
}

.section--alt {
    background: var(--color-bg-alt);
}

.section__header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
}

.section__eyebrow {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .1em;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.section__header h2 {
    margin-bottom: 16px;
}

.section__header p {
    color: var(--color-text-muted);
    font-size: 17px;
}

/* --- Header --- */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header .container {
    display: flex;
    flex-direction: column;
}

.header__top {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 68px;
}

.header__logo {
    flex-shrink: 0;
}

.header__logo-img {
    height: 30px;
    width: auto;
}

.header__contacts {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
}

.header__contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header__email,
.header__phone {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-secondary);
    transition: color var(--transition);
}

.header__email svg,
.header__phone svg {
    width: 18px;
    height: 18px;
}

.header__email:hover,
.header__phone:hover {
    color: var(--color-primary);
}

.header__hours {
    font-size: 13px;
    color: var(--color-text-muted);
}

.header__copy {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--color-text-light);
    transition: all var(--transition);
}

.header__copy svg {
    width: 16px;
    height: 16px;
}

.header__copy:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary);
}

.header__callback {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-primary);
    padding: 4px 12px;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition);
}

.header__callback:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.header__messengers {
    display: flex;
    gap: 8px;
}

.header__messenger {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
    transition: all var(--transition);
}

.header__messenger svg {
    width: 20px;
    height: 20px;
}

.header__messenger:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.header__cta {
    flex-shrink: 0;
}

/* Burger */
.header__burger {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 56px;
    height: 44px;
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.header__burger span {
    display: block;
    height: 2px;
    width: 22px;
    background: var(--color-primary);
    border-radius: 1px;
    transition: all .3s;
}

.header__burger-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: .03em;
    line-height: 1;
    margin-top: 1px;
}

.header__burger[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.header__burger[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}
.header__burger[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Nav */
.header__nav {
    border-top: 1px solid var(--color-border);
}

.header__menu {
    display: flex;
    align-items: center;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

.header__menu-item {
    position: relative;
}

.header__menu-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 12px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    transition: color var(--transition);
    white-space: nowrap;
}

.header__menu-link svg {
    width: 14px;
    height: 14px;
    transition: transform var(--transition);
}

.header__menu-link:hover {
    color: var(--color-primary);
}

.header__menu-item:hover .header__menu-link svg {
    transform: rotate(180deg);
}

/* Mega Menu */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 0 var(--radius-md) var(--radius-md) var(--radius-md);
    box-shadow: 0 12px 40px rgba(0,0,0,.12);
    padding: 28px 32px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .2s, visibility .2s;
    z-index: var(--z-sticky-sub);
    width: max-content;
    max-width: 900px;
}

.header__menu-item--mega:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.mega-menu__grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(150px, 1fr));
    gap: 24px;
}

.mega-menu__title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--color-secondary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-primary-light);
}

.mega-menu__list li {
    margin-bottom: 4px;
}

.mega-menu__list a {
    font-size: 13px;
    color: var(--color-text);
    transition: color var(--transition);
    padding: 3px 0;
    display: inline-block;
    line-height: 1.4;
}

.mega-menu__list a:hover {
    color: var(--color-primary);
}

/* --- Aside (Mobile Menu) --- */
.aside {
    position: fixed;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 85vw;
    height: 100vh;
    background: var(--color-white);
    z-index: var(--z-aside);
    transform: translateX(100%);
    transition: transform .3s ease;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.aside[aria-hidden="false"] {
    transform: translateX(0);
}

.aside__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.aside__logo svg {
    width: 88px;
    height: 30px;
}

.aside__close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

.aside__close svg {
    width: 20px;
    height: 20px;
}

.aside__nav {
    flex: 1;
    padding: 16px 20px;
}

.aside__accordion-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 12px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-secondary);
}

.aside__accordion-trigger svg {
    width: 16px;
    height: 16px;
    transition: transform .3s;
}

.aside__accordion-trigger[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

.aside__accordion-panel {
    display: none;
    padding-left: 12px;
    padding-bottom: 8px;
}

.aside__accordion-trigger[aria-expanded="true"] + .aside__accordion-panel {
    display: block;
}

.aside__group-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--color-text-muted);
    margin: 12px 0 8px;
}

.aside__list li {
    margin-bottom: 4px;
}

.aside__list a {
    font-size: 14px;
    color: var(--color-text);
    padding: 4px 0;
    display: block;
}

.aside__list a:hover {
    color: var(--color-primary);
}

.aside__link {
    display: block;
    padding: 12px 0;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
}

.aside__link:hover {
    color: var(--color-primary);
}

.aside__footer {
    padding: 20px;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.aside__phone {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-secondary);
}

.aside__email {
    font-size: 14px;
    color: var(--color-text-muted);
}

.aside__hours {
    font-size: 13px;
    color: var(--color-text-light);
}

.aside-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: var(--z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all .3s;
}

.aside-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

/* --- Footer --- */
.footer {
    background: #0f1728;
    color: var(--color-text-light);
    padding: 64px 0 32px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer__logo {
    display: block;
    margin-bottom: 12px;
}

.footer__logo img {
    filter: brightness(0) invert(1);
}

.footer__desc {
    font-size: 14px;
    line-height: 1.7;
    max-width: 280px;
}

.footer__title {
    color: var(--color-white);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .08em;
    margin-bottom: 16px;
}

.footer__list li {
    margin-bottom: 10px;
}

.footer__list a {
    font-size: 14px;
    color: var(--color-text-light);
    transition: color var(--transition);
}

.footer__list a:hover {
    color: var(--color-white);
}

.footer__col--contacts address {
    font-style: normal;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 14px;
}

.footer__col--contacts a {
    color: var(--color-text-light);
    transition: color var(--transition);
}

.footer__col--contacts a:hover {
    color: var(--color-white);
}

.footer__docs {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    padding: 20px 0;
    border-top: 1px solid #1f2d47;
    border-bottom: 1px solid #1f2d47;
    margin-bottom: 24px;
}

.footer__docs a {
    font-size: 13px;
    color: var(--color-text-light);
    transition: color var(--transition);
}

.footer__docs a:hover {
    color: var(--color-white);
}

.footer__bottom {
    padding-top: 24px;
    border-top: 1px solid #1f2d47;
    font-size: 13px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

/* --- Footer Cities --- */
.footer__cities {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,.1);
    margin-bottom: 24px;
}

.footer__cities-title {
    font-size: 14px;
    font-weight: 500;
    color: rgba(255,255,255,.7);
    margin: 0 0 12px;
}

.footer__cities-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer__cities-item {
    margin: 0;
    padding: 0;
}

.footer__cities-link {
    color: rgba(255,255,255,.6);
    font-size: 13px;
    text-decoration: none;
    transition: color var(--transition);
}

.footer__cities-link:hover {
    color: #fff;
}

/* --- Floating --- */
.floating {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 90;
}

.floating__btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(0,0,0,.15);
    transition: all var(--transition);
}

.floating__btn svg {
    width: 22px;
    height: 22px;
}

.floating__btn--tg {
    background: #229ED9;
    color: var(--color-white);
}

.floating__btn--wa {
    background: #25D366;
    color: var(--color-white);
}

.floating__btn--top {
    background: var(--color-white);
    color: var(--color-secondary);
    border: 1px solid var(--color-border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all .3s;
}

.floating__btn--top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.floating__btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,.2);
}

.floating__btn--top:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .header__contacts,
    .header__messengers,
    .header__cta,
    .header__callback {
        display: none;
    }

    .header__burger {
        display: flex;
        margin-left: auto;
    }

    .header__contact-item {
        margin-left: auto;
    }

    .header__nav {
        display: none;
    }

    .mega-menu {
        min-width: auto;
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }

    .section__header {
        margin-bottom: 40px;
    }

    .header__contact-item .header__phone span {
        display: none;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer__bottom {
        flex-direction: column;
        text-align: center;
    }

    .floating {
        bottom: 16px;
        right: 16px;
    }

    .floating__btn {
        width: 44px;
        height: 44px;
    }
}