/* ==========================================================================
   1. БАЗОВЫЕ НАСТРОЙКИ, ШРИФТЫ И ПЕРЕМЕННЫЕ (3 цвета)
   ========================================================================== */
:root {
    --primary-color: #1e3a8a;    /* 1. Глубокий синий (основной цвет бренда) */
    --secondary-color: #06b6d4;  /* 2. Технологичный циан (для акцентов и кнопок) */
    --bg-color: #f8fafc;         /* 3. Светло-серый (мягкий фон для страниц) */
    --text-color: #333333;       /* Контрастный темный для текста */
    --white: #ffffff;
    --font-main: 'Segoe UI', Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 30px 15px;
}

.hidden-hack {
    display: none;
}

#a11y-toggle:checked ~ .page-wrapper {
    filter: contrast(150%) grayscale(100%);
    font-size: 115%;
}

/* ==========================================================================
   2. ШАПКА И НАВИГАЦИЯ (По умолчанию: Мобильная версия / Mobile First)
   ========================================================================== */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-text {
    font-size: 22px;
    font-weight: bold;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.burger-icon {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.burger-icon span {
    width: 28px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.main-nav {
    display: none; 
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--white);
    padding: 20px;
    gap: 15px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    border-top: 1px solid #e2e8f0;
}

#mobile-menu-toggle:checked ~ .main-nav {
    display: flex;
}

#mobile-menu-toggle:checked ~ .burger-icon span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

#mobile-menu-toggle:checked ~ .burger-icon span:nth-child(2) {
    opacity: 0;
}

#mobile-menu-toggle:checked ~ .burger-icon span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Ссылки навигации */
.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 5px 0;
    transition: color 0.3s ease;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--secondary-color);
}

/* --- Раздельная стилизация активных страниц --- */
.nav-link.page-index-active {
    color: var(--secondary-color);
}

.btn-primary.page-apply-active {
    background-color: var(--primary-color);
    box-shadow: inset 0 0 0 2px var(--secondary-color);
}

/* Кнопки */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: #0891b2;
    transform: translateY(-1px);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

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

/* ==========================================================================
   3. ГЛАВНАЯ СТРАНИЦА: СЛАЙДЕР, ЦЕЛИ И ЗАДАЧИ, НОВОСТИ
   ========================================================================== */
.section-title {
    text-align: center;
    font-size: 26px;
    color: var(--primary-color);
    margin: 25px 0;
}

/* Слайдер */
.slider-container {
    width: 100%;
    margin-bottom: 40px;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.06);
}

.slider-track {
    display: flex;
    width: 300%;
    animation: slide 15s infinite ease-in-out;
}

.slide {
    width: 33.333%;
    position: relative;
    background-color: #eaeded;
}

.slide img {
    width: 100%;
    height: auto;
    max-height: 450px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

.slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(30, 58, 138, 0.9));
    color: var(--white);
    padding: 15px;
    font-size: 16px;
    text-align: center;
    font-weight: 500;
}

@keyframes slide {
    0%, 28% { transform: translateX(0); }
    33%, 61% { transform: translateX(-33.333%); }
    66%, 94% { transform: translateX(-66.666%); }
    100% { transform: translateX(0); }
}

/* Описание целей и задач */
.goals-description {
    max-width: 850px;
    margin: 0 auto 25px auto;
    text-align: center;
    font-size: 16px;
    color: var(--text-color);
    line-height: 1.7;
    padding: 0 10px;
}

.goals-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 45px;
}

.goal-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    border-top: 4px solid var(--secondary-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    text-align: center;
}

.goal-card h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 19px;
}

/* Карточки новостей */
.news-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

.news-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.news-card img {
    width: 100%;
    height: auto;
    max-height: 240px;
    object-fit: cover;
}

.news-content {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.news-date {
    font-size: 13px;
    color: #6b7280;
    margin-bottom: 10px;
    font-weight: 500;
}

.news-content h3 {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-content p {
    color: #4b5563;
    margin-bottom: 25px;
    font-size: 15px;
    flex-grow: 1;
}

.news-content .btn {
    align-self: flex-start;
    margin-top: auto;
}

/* ==========================================================================
   4. СТРАНИЦА ЗАЯВКИ И ВАЛИДАЦИЯ
   ========================================================================== */
.form-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--primary-color);
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1.5px solid #cbd5e1;
    border-radius: 6px;
    font-family: inherit;
    font-size: 16px;
    background-color: var(--bg-color);
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary-color);
    background-color: var(--white);
}

.form-control:invalid:not(:placeholder-shown) {
    border-color: #ef4444;
    background-color: rgba(239, 68, 68, 0.01);
}

.form-control:valid:not(:placeholder-shown) {
    border-color: #10b981;
}

.checkbox-group {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 5px;
}

.checkbox-group label {
    font-weight: normal;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox-group input {
    width: 18px;
    height: 18px;
    accent-color: var(--secondary-color);
}

.submit-btn {
    width: 100%;
    padding: 14px;
    font-size: 18px;
    margin-top: 10px;
}

.success-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--white);
    padding: 35px;
    border-radius: 10px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
    text-align: center;
    border-top: 6px solid #10b981;
    z-index: 1000;
    width: 90%;
    max-width: 400px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.application-form:valid .submit-btn:active ~ .success-modal {
    animation: showModalDuration 5s forwards;
}

@keyframes showModalDuration {
    0% { opacity: 0; visibility: visible; }
    5% { opacity: 1; visibility: visible; }
    95% { opacity: 1; visibility: visible; }
    100% { opacity: 0; visibility: hidden; }
}

footer {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 20px;
    margin-top: auto;
    font-size: 14px;
}

/* ==========================================================================
   6. АДАПТИВНОСТЬ ПОД БОЛЬШИЕ ЭКРАНЫ (В т.ч. под разрешение 1280x720)
   ========================================================================== */
@media (min-width: 768px) {
    .burger-icon {
        display: none;
    }


    .header-container {
        flex-direction: row !important;
        justify-content: space-between !important;
        align-items: center !important;
        flex-wrap: nowrap !important; 
    }


    .main-nav {
        display: flex !important;
        flex-direction: row !important;
        position: static !important;
        width: auto !important;
        padding: 0 !important;
        box-shadow: none !important;
        border: none !important;
        gap: clamp(8px, 1.2vw, 20px) !important;
        align-items: center !important;
        justify-content: flex-end !important;
        flex-grow: 1 !important;
        flex-wrap: nowrap !important; 
    }

    #a11y-toggle:checked ~ .page-wrapper .main-nav {
        gap: 6px !important; 
    }

    #a11y-toggle:checked ~ .page-wrapper .btn {
        padding: 8px 12px !important; 
        font-size: 14px !important; 
    }

    .section-title {
        font-size: 32px;
        margin: 35px 0;
    }

    .slide-caption {
        font-size: 20px;
        padding: 20px;
    }

    .goals-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 25px;
    }

    .news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .checkbox-group {
        grid-template-columns: 1fr 1fr;
    }
}