:root {
    --primary-blue: #005EB8; /* Основной цвет из логотипа СЮП */
    --dark-blue: #003d7a;
    --accent-gold: #D4AF37;
    --accent-gold-dark: #002855; /* Темно-синий для контраста на золотом */
    --text-dark: #1a202c;
    --text-light: #4a5568;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --georgian-ribbon: repeating-linear-gradient(90deg, #000 0px, #000 20px, #f39c12 20px, #f39c12 40px);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-light);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.site-header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid var(--primary-blue);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-menu a:hover {
    color: var(--accent-gold);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-blue);
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 61, 122, 0.55), rgba(0, 94, 184, 0.6)), url('/fe403bd5-a0eb-4482-a165-bf20ccd95854_bd91cd02facb.png') center/cover;
    color: var(--white);
    padding: 5rem 1.5rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.95;
}

/* Flags Section */
.region-flags {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.region-flags img {
    width: 32px;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.region-flags span {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Buttons (Исправлена читаемость) */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    background-color: var(--primary-blue);
    color: var(--white);
    text-decoration: none;
    font-weight: 700;
    border-radius: 6px;
    transition: all 0.3s;
    border: 2px solid var(--primary-blue);
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background-color: var(--dark-blue);
    border-color: var(--dark-blue);
    transform: translateY(-2px);
}

.btn-gold {
    background-color: var(--accent-gold);
    color: var(--accent-gold-dark);
    border-color: var(--accent-gold);
}

.btn-gold:hover {
    background-color: #e5c158;
    border-color: #e5c158;
}

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

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

.btn-light {
    background-color: var(--bg-light);
    color: var(--text-dark);
    border-color: #cbd5e0;
}

.btn-light:hover {
    background-color: #e2e8f0;
    border-color: #cbd5e0;
}

/* Sections */
.section {
    padding: 4rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--georgian-ribbon);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.info-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-top: 4px solid var(--primary-blue);
}

.info-card h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.2rem;
}

.info-card ul {
    list-style: none;
    padding-left: 0;
}

.info-card li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.info-card li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--accent-gold);
    position: absolute;
    left: 0;
    top: 2px;
}

/* Lessons Grid */
.lessons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.lesson-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    border: 1px solid #e2e8f0;
}

.lesson-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 94, 184, 0.15);
    border-color: var(--primary-blue);
}

.lesson-card-header {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 1rem 1.5rem;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.lesson-card-body {
    padding: 1.5rem;
    flex-grow: 1;
}

.lesson-card-body h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.lesson-card-body p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* Lesson Page Specific */
.lesson-content {
    background: var(--white);
    padding: 3rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.breadcrumb {
    margin-bottom: 2rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.lesson-meta {
    display: flex;
    gap: 2rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--accent-gold);
}

.lesson-meta h4 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.download-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #e2e8f0;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Project Upload Section */
.project-upload {
    background: var(--primary-blue);
    color: var(--white);
    padding: 4rem 1.5rem;
    text-align: center;
    margin-top: 4rem;
}

.project-upload h2 {
    margin-bottom: 1rem;
    font-size: 2rem;
}

.project-upload p {
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.95;
    font-size: 1.1rem;
}

/* Footer */
.site-footer {
    background-color: #002855;
    color: var(--white);
    padding: 3rem 1.5rem 1.5rem;
    margin-top: auto;
    border-top: 4px solid var(--accent-gold);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    color: var(--accent-gold);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-col a {
    color: #cbd5e0;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.85rem;
    color: #94a3b8;
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        display: none;
        border-top: 1px solid #e2e8f0;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .region-flags {
        flex-direction: column;
        gap: 0.5rem;
        padding: 1rem;
    }
    
    .lesson-content {
        padding: 1.5rem;
    }
    
    .lesson-meta {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .download-section {
        flex-direction: column;
    }
    
    .download-section .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Подписи под кнопками скачивания в карточке урока */
.download-card .download-hint{
  font-size:12.5px;
  color:var(--muted);
  line-height:1.45;
  margin:8px 2px 14px;
  text-align:left;
}
.download-card .btn-block + .download-hint{ margin-top:8px; }
.download-card .download-hint + .btn-block{ margin-top:0; }

/* =========================================================
   Три кнопки скачивания с подписями (страница урока)
   ========================================================= */
.download-section{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    align-items: start;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #e2e8f0;
}

.download-section > h4{
    grid-column: 1 / -1;
    margin: 0;
    color: var(--text-dark);
    font-size: 1.05rem;
}

.download-item{
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.download-item .btn{
    width: 100%;
    justify-content: center;
}

.download-hint{
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.45;
    margin: 0;
    text-align: center;
}

@media (max-width: 768px){
    .download-section{ grid-template-columns: 1fr; }
}

/* =========================================================
   Заглушка «Материалы в разработке»
   ========================================================= */
.lesson-stub{
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
    margin: 2.5rem 0 1rem;
    padding: 3rem 2rem;
    border: 2px dashed #cbd5e0;
    border-radius: 12px;
    background: var(--bg-light);
}

.lesson-stub-icon{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--accent-gold);
    color: var(--accent-gold);
    font-size: 1.8rem;
    box-shadow: 0 6px 18px rgba(212, 175, 55, 0.18);
}

.lesson-stub h3{
    margin: 0;
    color: var(--primary-blue);
    font-size: 1.4rem;
}

.lesson-stub p{
    margin: 0;
    max-width: 620px;
    color: var(--text-light);
    line-height: 1.6;
}

.lesson-stub-badge{
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    background: var(--white);
    border: 1px solid #e2e8f0;
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.lesson-stub-badge i{
    color: var(--accent-gold);
    font-size: 0.8rem;
}

@media (max-width: 768px){
    .lesson-stub{ padding: 2rem 1.25rem; }
    .lesson-stub-icon{ width: 60px; height: 60px; font-size: 1.5rem; }
    .lesson-stub h3{ font-size: 1.2rem; }
}