:root {
    --bg-white: #FFFFFF;
    --bg-light-gray: #F8F9FA;
    --text-dark: #212529;
    --text-headings: #111111;
    --accent-blue: #1a334a;
    --border-color: #DEE2E6;
    --font-main: 'Montserrat', sans-serif;
}
body::-webkit-scrollbar {
    width: 8px;
}
body::-webkit-scrollbar-track {
    background: var(--bg-light-gray);
}
body::-webkit-scrollbar-thumb {
    background-color: var(--accent-blue);
}
body::-webkit-scrollbar-thumb:hover {
    background-color: #06233d;
}
::selection {
    background-color: var(--accent-blue);
    color: var(--bg-white);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main), serif; color: var(--text-dark); line-height: 1.6; background-color: var(--bg-white); }
.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
section { padding: 80px 0; }
.section-title, .page-header h1 { font-size: 2.5rem; color: var(--text-headings); text-align: center; margin-bottom: 40px; }
.page-header { background-color: var(--bg-light-gray); text-align: center; padding: 60px 0; }
.page-header p { font-size: 1.1rem; color: #6c757d; }
a { color: var(--accent-blue); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--text-dark); }
img { max-width: 100%; height: auto; display: block; }

/* УЛУЧШЕНИЯ ДЛЯ КНОПОК ===== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: 2px solid var(--accent-blue);
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    cursor: pointer;
}
.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}
.btn-primary {
    background-color: var(--accent-blue);
    color: var(--bg-white);
}
.btn-primary:hover {
    background-color: #06233d;
    border-color: #06233d;
    color: var(--bg-white);
}
a.project-card { text-decoration: none; }

.header { background-color: var(--bg-white); border-bottom: 1px solid var(--border-color); padding: 20px 0; position: sticky; top: 0; z-index: 1000; }
.header__container { display: flex; justify-content: space-between; align-items: center; }
.header__logo { font-weight: 600; font-size: 1.5rem; color: var(--text-headings); }
.header__nav ul { display: flex; list-style: none; gap: 30px; }

/* УЛУЧШЕНИЯ ДЛЯ НАВИГАЦИИ ===== */
.header__nav a {
    color: var(--text-dark);
    font-weight: 600;
    position: relative;
    padding-bottom: 5px;
}
.header__nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-blue);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}
.header__nav a:hover::after {
    transform: scaleX(1);
}

.hamburger { display: none; background: transparent; border: none; cursor: pointer; padding: 5px; }
.hamburger__bar { display: block; width: 25px; height: 3px; margin: 5px 0; background-color: var(--text-dark); transition: all 0.3s ease-in-out; }
.hamburger.is-active .hamburger__bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.is-active .hamburger__bar:nth-child(2) { opacity: 0; }
.hamburger.is-active .hamburger__bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.hero { background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.2)), url('https://textur.gas-kvas.com/uploads/posts/2024-10/textur-gas-kvas-com-w57u-p-tekstura-abstraktnaya-belaya-1.jpg') no-repeat center center/cover; color: var(--bg-white); text-align: center; padding: 150px 0; }
.hero__title { font-size: 3.5rem; line-height: 1.2; margin-bottom: 20px; }
.hero__subtitle { font-size: 1.2rem; max-width: 600px; margin: 0 auto 40px; }
.hero .btn-primary:hover { background-color: transparent; color: var(--bg-white); border-color: var(--bg-white); }
.projects { padding-bottom: 60px; }
.projects--full-page { background-color: var(--bg-light-gray); }
.projects__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }

/* УЛУЧШЕНИЯ ДЛЯ КАРТОЧЕК ПРОЕКТОВ */
.project-card {
    background: var(--bg-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.12);
}
.project-card__content { padding: 20px; }
.project-card__title { font-size: 1.25rem; margin-bottom: 5px; color: var(--text-headings); }
.project-card__category { color: #6c757d; }
.projects__action { text-align: center; margin-top: 50px; }
.projects__action .btn { color: var(--accent-blue); }
.projects__action .btn:hover { background-color: var(--accent-blue); color: var(--bg-white); }
.about-preview { background-color: var(--bg-light-gray); }
.about-preview__container { display: flex; align-items: center; gap: 60px; }
.about-preview__image { flex: 1; }
.about-preview__text { flex: 1; }
.about-preview__text .section-title { text-align: left; margin-bottom: 20px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; }
.contact-details h3, .contact-form h3 { font-size: 1.5rem; margin-bottom: 20px; color: var(--text-headings); }
.contact-details p { margin-bottom: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: 600; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: var(--font-main), serif;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    resize: none;
}

/* УЛУЧШЕНИЯ ДЛЯ ФОРМ */
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(26, 51, 74, 0.15);
}
.contact-form button { width: 100%; }
.footer { background-color: var(--text-dark); color: var(--bg-light-gray); padding: 60px 0; font-size: 0.9rem; }
.footer__container { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer a { color: var(--bg-light-gray); }
.footer a:hover { color: var(--bg-white); text-decoration: underline; }
.footer__logo { font-size: 1.5rem; font-weight: 600; margin-bottom: 15px; display: inline-block; }
.footer h4 { font-size: 1.1rem; margin-bottom: 15px; color: var(--bg-white); }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 10px; }
.project-card, .about-preview__image, .about-preview__text, .service-card, .service-card--new { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.visible { opacity: 1; transform: translateY(0); }
.about-content h2 { text-align: center; font-size: 2rem; margin-bottom: 30px; }
.about-content p { max-width: 800px; margin: 0 auto; text-align: center; font-size: 1.1rem; line-height: 1.7; }
.inst { font-size: 12px; }
.services__grid--new { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }

/* УЛУЧШЕНИЯ ДЛЯ КАРТОЧЕК УСЛУГ */
.service-card--new {
    background-color: var(--bg-white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    border: 1px solid transparent;
    transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}
.service-card--new:hover {
    transform: translateY(-5px);
    border-color: var(--accent-blue);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.service-card__title { color: var(--accent-blue); margin-bottom: 20px; font-size: 1.25rem; }
.service-card__list { list-style: none; padding: 0; margin: 0 0 20px 0; text-align: left; flex-grow: 1; }
.service-card__list li { margin-bottom: 15px; padding-left: 20px; position: relative; }
.service-card__list li::before { content: '•'; color: var(--accent-blue); position: absolute; left: 0; font-size: 1.2rem; line-height: 1.6; }
.service-card__list li strong { color: var(--text-headings); }
.service-card__link { font-weight: 600; color: var(--accent-blue); text-decoration: none; transition: color 0.3s; }
.service-card__link:hover { color: #06233d; }
.cta-block { background-color: var(--accent-blue); color: var(--bg-white); text-align: center; padding: 60px 0; }
.cta-block h2 { font-size: 2rem; margin-bottom: 30px; max-width: 700px; margin-left: auto; margin-right: auto; }
.cta-block .btn-primary { background-color: var(--bg-white); color: var(--accent-blue); border-color: var(--bg-white); }
.cta-block .btn-primary:hover { background-color: transparent; color: var(--bg-white); }
.project-details { padding: 40px 0; }
.project-details__container { display: grid; grid-template-columns: 1fr; gap: 40px; align-items: flex-start; }
.project-details__image img { border-radius: 8px; box-shadow: 0 8px 25px rgba(0,0,0,0.1); }
.project-details__block { margin-bottom: 30px; }
.project-details__block h3 { font-size: 1.5rem; color: var(--accent-blue); margin-bottom: 15px; }
.project-details__block p, .project-details__block ul { font-size: 1.1rem; line-height: 1.7; }
.project-details__block ul { list-style: none; padding: 0; }
.project-details__block ul li { padding-left: 25px; position: relative; margin-bottom: 10px; }
.project-details__block ul li::before { content: '✓'; color: var(--accent-blue); position: absolute; left: 0; font-weight: 600; }
.popup-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); z-index: 2000; display: flex; justify-content: center; align-items: center; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease; }
.popup-overlay.is-active { opacity: 1; visibility: visible; }
.popup-form-container { background: var(--bg-white); padding: 40px; border-radius: 8px; width: 90%; max-width: 500px; position: relative; transform: scale(0.9); transition: transform 0.3s ease; }
.popup-overlay.is-active .popup-form-container { transform: scale(1); }
.popup-form-container h3 { text-align: center; font-size: 1.8rem; margin-bottom: 10px; }
.popup-form-container p { text-align: center; color: #6c757d; margin-bottom: 25px; }
.popup-close-btn { position: absolute; top: 15px; right: 15px; background: transparent; border: none; font-size: 2rem; line-height: 1; cursor: pointer; color: #aaa; }
.popup-close-btn:hover { color: #333; }
.form-status { margin-top: 15px; text-align: center; font-weight: 600; }
.sticky-cta-btn { position: fixed; bottom: 20px; right: 20px; z-index: 1000; padding: 12px 24px; background-color: var(--accent-blue); color: var(--bg-white); border: none; border-radius: 50px; font-weight: 600; box-shadow: 0 4px 15px rgba(0,0,0,0.2); cursor: pointer; transition: all 0.3s ease; }
.sticky-cta-btn:hover { transform: scale(1.05); background-color: #06233d; }
.page-header--projects {
    background: linear-gradient(rgba(17, 17, 17, 0.7), rgba(17, 17, 17, 0.6)), url('https://textur.gas-kvas.com/uploads/posts/2024-10/textur-gas-kvas-com-w57u-p-tekstura-abstraktnaya-belaya-1.jpg') no-repeat center center/cover;
    color: var(--bg-white);
    padding: 80px 0;
}
.page-header--projects h1 {
    color: var(--bg-white);
}
.page-header--projects p {
    color: rgba(255, 255, 255, 0.85);
}

/* СТИЛИ ДЛЯ БЛОКА "КЛЮЧЕВЫЕ ФИГУРЫ" */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}
.team-card {
    background-color: var(--bg-white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    text-align: center;
    border: 1px solid var(--border-color);
}
.team-card h3 {
    font-size: 1.25rem;
    margin-bottom: 5px;
    color: var(--text-headings);
}
.team-card span {
    display: block;
    color: var(--accent-blue);
    font-weight: 600;
    margin-bottom: 15px;
}

@media (min-width: 992px) {
    .project-details__container { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 992px) {
    .about-preview__container { flex-direction: column; }
    .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .section-title, .page-header h1 { font-size: 2rem; }
    .hero__title { font-size: 2.5rem; }
    .header__nav { display: flex; position: fixed; top: 77px; left: 0; width: 100%; height: calc(100vh - 77px); background-color: rgba(17, 17, 17, 0.98); flex-direction: column; justify-content: center; align-items: center; transform: translateX(100%); transition: transform 0.4s ease-in-out; }
    .header__nav.is-active { transform: translateX(0); }
    .header__nav ul { flex-direction: column; text-align: center; gap: 40px; }
    .header__nav a { font-size: 1.3rem; color: var(--bg-white); }
    .header__nav a:hover::after { background-color: var(--bg-white); }
    .hamburger { display: block; z-index: 1001; }
    .footer__container { grid-template-columns: 1fr; text-align: center; }
    .about-preview__text .section-title { text-align: center; }
}
@media (max-width: 480px) {
    .hero__title { font-size: 2rem; }
    .btn { font-size: 0.9rem; padding: 10px 20px; }
}
@media (max-width: 380px) {
    .projects__grid { grid-template-columns: 1fr; }
}

.projects--full-page .project-card {
    opacity: 1;
    transform: none;
}