/* ===== VARIABLES ===== */
:root {
    --color-primary: #1a3a5c;
    --color-primary-dark: #0f2744;
    --color-accent: #e8a838;
    --color-accent-hover: #d4952e;
    --color-text: #333;
    --color-text-light: #666;
    --color-bg: #fff;
    --color-bg-alt: #f5f7fa;
    --color-bg-dark: #1a2332;
    --color-border: #dde1e7;
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --container: 1200px;
    --header-h: 72px;
    --radius: 8px;
    --shadow: 0 4px 20px rgba(0,0,0,.06);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.1);
    --transition: .3s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body { font-family: var(--font-main); color: var(--color-text); line-height: 1.6; background: var(--color-bg); -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; font-size: inherit; }

/* ===== UTILITY ===== */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}
.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-label {
    display: inline-block;
    font-size: .8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--color-accent);
    margin-bottom: 12px;
}
.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
    line-height: 1.3;
}
.section-subtitle {
    color: var(--color-text-light);
    font-size: 1.1rem;
    max-width: 560px;
    margin: 0 auto;
}
.placeholder-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 60px 0;
    color: #bbb;
    font-style: italic;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 32px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    text-align: center;
}
.btn--primary {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 4px 12px rgba(232,168,56,.3);
}
.btn--primary:hover {
    background: var(--color-accent-hover);
    box-shadow: 0 6px 20px rgba(232,168,56,.4);
    transform: translateY(-1px);
}
.btn--ghost {
    border: 2px solid rgba(255,255,255,.4);
    color: #fff;
}
.btn--ghost:hover {
    border-color: #fff;
    background: rgba(255,255,255,.1);
}
.btn--outline {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}
.btn--outline:hover {
    background: var(--color-primary);
    color: #fff;
}
.btn--lg { padding: 16px 48px; font-size: 1.05rem; }

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-h);
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,.06);
    z-index: 1000;
    transition: var(--transition);
}
.header--scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,.08);
}
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 24px;
}
.header__logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-icon { flex-shrink: 0; }
.logo-text {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 2px;
}
.header__nav {
    display: flex;
    gap: 32px;
}
.nav__link {
    font-weight: 500;
    font-size: .95rem;
    color: var(--color-text-light);
    position: relative;
    padding: 4px 0;
    transition: var(--transition);
}
.nav__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
    border-radius: 1px;
}
.nav__link:hover,
.nav__link.active { color: var(--color-primary); }
.nav__link:hover::after,
.nav__link.active::after { width: 100%; }
.header__phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: .95rem;
    color: var(--color-primary);
    white-space: nowrap;
    transition: var(--transition);
}
.header__phone:hover { color: var(--color-accent); }
.header__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    padding: 4px 0;
}
.header__burger span {
    display: block;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
    position: relative;
    height: 620px;
    margin-top: var(--header-h);
    overflow: hidden;
    background: var(--color-primary-dark);
}
.hero__bg-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(232,168,56,.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(44,95,138,.2) 0%, transparent 50%);
    z-index: 1;
}
.hero__slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease;
}
.hero__slide.active { opacity: 1; }
.hero__slide[data-slide="0"] {
    background: url('../img/slide1.jpg') center/cover no-repeat, linear-gradient(135deg, #142d4a 0%, #1e4d73 40%, #1a3a5c 100%);
}
.hero__slide[data-slide="1"] {
    background: url('../img/slide2.png') center/cover no-repeat, linear-gradient(135deg, #0f2744 0%, #1a4a6e 40%, #142d4a 100%);
}
.hero__overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(15,39,68,.85) 0%, rgba(15,39,68,.4) 60%, rgba(15,39,68,.2) 100%);
}
.hero__content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: #fff;
    max-width: 640px;
}
.hero__badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(232,168,56,.15);
    border: 1px solid rgba(232,168,56,.3);
    border-radius: 20px;
    font-size: .85rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 20px;
    width: fit-content;
}
.hero__title {
    font-size: 2.6rem;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
    letter-spacing: -.5px;
}
.hero__list {
    margin-bottom: 32px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.hero__list li {
    font-size: 1.05rem;
    padding-left: 24px;
    position: relative;
    opacity: .85;
}
.hero__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
}
.hero__actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.hero__visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 380px;
    height: 380px;
    z-index: 2;
    opacity: .6;
}
.hero__svg { width: 100%; height: 100%; }
.hero__dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}
.hero__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,.5);
    background: transparent;
    transition: var(--transition);
}
.hero__dot.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    width: 28px;
    border-radius: 5px;
}
.hero__scroll-hint {
    position: absolute;
    bottom: 24px;
    right: 32px;
    z-index: 3;
    animation: bounceDown 2s infinite;
}
@keyframes bounceDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* ===== ABOUT ===== */
.about {
    padding: 100px 0;
    background: var(--color-bg);
}
.about__grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}
.about__text p {
    margin-bottom: 16px;
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.8;
}
.about__features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 24px;
}
.about__feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: .95rem;
    color: var(--color-primary);
}
.about__stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}
.stat {
    text-align: center;
    padding: 32px 20px;
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.stat:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}
.stat__icon {
    margin: 0 auto 12px;
    display: block;
}
.stat__number {
    display: block;
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}
.stat__suffix {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary);
}
.stat__label {
    display: block;
    margin-top: 8px;
    font-size: .85rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== PORTFOLIO ===== */
.portfolio {
    padding: 100px 0;
    background: var(--color-bg-alt);
}
.portfolio__tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
}
.portfolio__tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius);
    font-size: .9rem;
    font-weight: 500;
    color: var(--color-text-light);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.portfolio__tab svg { flex-shrink: 0; }
.portfolio__tab:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
}
.portfolio__tab.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(26,58,92,.2);
}
.portfolio__panel {
    display: none;
    animation: fadeIn .5s ease;
}
.portfolio__panel.active { display: block; }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: none; }
}
.portfolio__card {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 0;
    background: var(--color-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.portfolio__img-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 380px;
    background: linear-gradient(135deg, #eef2f7 0%, #dde3eb 100%);
    position: relative;
}
.portfolio__img-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(26,58,92,.02) 20px,
        rgba(26,58,92,.02) 40px
    );
}
.portfolio__info {
    padding: 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.portfolio__info h3 {
    font-size: 1.4rem;
    color: var(--color-primary);
    margin-bottom: 16px;
    line-height: 1.35;
}
.portfolio__info p {
    color: var(--color-text-light);
    margin-bottom: 12px;
    line-height: 1.75;
    font-size: .95rem;
}
.portfolio__info .btn { margin-top: 16px; align-self: flex-start; }

/* ===== ADVANTAGES & EXPERIENCE (placeholders) ===== */
.advantages,
.experience {
    padding: 80px 0;
    text-align: center;
}
.advantages { background: var(--color-bg); }
.experience { background: var(--color-bg-alt); }

/* ===== CONTACT ===== */
.contact {
    padding: 100px 0;
    background: var(--color-bg);
}
.contact__wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: start;
}
.contact__form {
    background: var(--color-bg-alt);
    padding: 40px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}
.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}
.form__group { display: flex; flex-direction: column; }
.form__group--full { margin-bottom: 24px; }
.form__group label {
    font-weight: 600;
    font-size: .85rem;
    margin-bottom: 6px;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: .5px;
}
.form__group input,
.form__group textarea {
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
    background: #fff;
}
.form__group input:focus,
.form__group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(232,168,56,.1);
}
.form__group textarea { resize: vertical; }
.contact__form .btn {
    display: block;
    width: 100%;
}
.contact__info {
    display: flex;
    flex-direction: column;
    gap: 32px;
    padding-top: 20px;
}
.contact__info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.contact__info-item svg { flex-shrink: 0; margin-top: 2px; }
.contact__info-item strong {
    display: block;
    font-size: .85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-primary);
    margin-bottom: 4px;
}
.contact__info-item p {
    color: var(--color-text-light);
    font-size: 1rem;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-bg-dark);
    color: #ccc;
    padding-top: 60px;
}
.footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer__logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.footer__logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: 2px;
}
.footer__desc {
    font-size: .9rem;
    line-height: 1.7;
    color: #8899aa;
    max-width: 320px;
}
.footer__col h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: .85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}
.footer__col a {
    display: block;
    color: #8899aa;
    margin-bottom: 10px;
    font-size: .95rem;
    transition: var(--transition);
}
.footer__col a:hover { color: var(--color-accent); transform: translateX(4px); }
.footer__col p {
    margin-bottom: 8px;
    font-size: .95rem;
    color: #8899aa;
}
.footer__bottom {
    padding: 24px 0;
    text-align: center;
    font-size: .8rem;
    color: #556677;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
    .about__grid { grid-template-columns: 1fr; gap: 40px; }
    .about__stats { grid-template-columns: repeat(3, 1fr); }
    .portfolio__card { grid-template-columns: 1fr; }
    .portfolio__info { padding: 32px; }
    .portfolio__img-placeholder { min-height: 240px; }
    .hero__visual { display: none; }
    .contact__wrapper { grid-template-columns: 1fr; }
    .contact__info { flex-direction: row; flex-wrap: wrap; gap: 24px; }
    .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    :root { --header-h: 60px; }
    .header__nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        gap: 0;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        box-shadow: var(--shadow);
    }
    .header__nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    .nav__link {
        padding: 16px 24px;
        border-bottom: 1px solid var(--color-border);
        font-size: 1rem;
    }
    .nav__link::after { display: none; }
    .header__phone { display: none; }
    .header__burger { display: flex; }
    .header__burger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .header__burger.open span:nth-child(2) { opacity: 0; }
    .header__burger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
    .hero { height: 560px; }
    .hero__title { font-size: 1.8rem; }
    .hero__list li { font-size: .95rem; }
    .hero__scroll-hint { display: none; }
    .hero__dots { bottom: 16px; }
    .hero__actions { margin-bottom: 40px; }
    .section-title { font-size: 1.7rem; }
    .section-header { margin-bottom: 40px; }
    .about, .portfolio, .contact { padding: 64px 0; }
    .about__stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .stat { padding: 20px 12px; }
    .stat__number { font-size: 2rem; }
    .stat__icon { width: 24px; height: 24px; }
    .portfolio__tabs { gap: 6px; }
    .portfolio__tab { padding: 8px 12px; font-size: .8rem; }
    .portfolio__tab svg { width: 16px; height: 16px; }
    .form__row { grid-template-columns: 1fr; }
    .contact__form { padding: 24px; }
    .contact__info { flex-direction: column; }
    .footer__inner { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 480px) {
    .hero { height: 580px; }
    .hero__title { font-size: 1.5rem; }
    .hero__badge { font-size: .75rem; }
    .hero__actions { flex-direction: column; margin-bottom: 48px; }
    .hero__actions .btn { width: 100%; }
    .about__stats { grid-template-columns: 1fr; }
    .about__features { gap: 10px; }
    .portfolio__tab { padding: 6px 10px; font-size: .75rem; }
}