:root {
    --color-primary: #0066FF;
    --color-secondary: #0F172A;
    --color-accent: #FFD700;
    --color-muted: #6B7280;
    --color-light: #F3F4F6;
    --color-white: #FFFFFF;
    --color-surface: rgba(255, 255, 255, 0.9);

    --font-heading: 'Roboto', 'Segoe UI', sans-serif;
    --font-body: 'Open Sans', 'Segoe UI', sans-serif;

    --space-2xs: 0.25rem;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-xxl: 6rem;

    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    --shadow-sm: 0 8px 20px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 15px 40px rgba(15, 23, 42, 0.12);

    --transition-base: all 0.35s ease;

    --max-width: 1200px;

    --gradient-primary: linear-gradient(135deg, rgba(0, 102, 255, 0.92), rgba(0, 102, 255, 0.45));
    --gradient-secondary: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(0, 102, 255, 0.7));
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--color-secondary);
    background: var(--color-light);
    line-height: 1.7;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

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

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

ul,
ol {
    list-style: none;
    padding: 0;
    margin: 0;
}

button,
input,
textarea,
select {
    font: inherit;
    color: inherit;
    background: transparent;
    border: none;
    outline: none;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-sm);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(18px);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 10%, rgba(255, 255, 255, 0.75) 100%);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    position: relative;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(1.25rem, 1.8vw, 1.75rem);
    letter-spacing: 0.04em;
    color: var(--color-primary);
}

.navigation {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    cursor: pointer;
    transition: var(--transition-base);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
    background: var(--color-secondary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-secondary);
}

.nav-links a {
    position: relative;
    padding: var(--space-2xs) 0;
    transition: var(--transition-base);
}

.nav-links a::after {
    content: "";
    position: absolute;
    inset: auto 0 -0.35rem 0;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
    transform: scaleX(1);
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
}

.page-content {
    flex: 1 0 auto;
}

.page-hero {
    position: relative;
    padding: var(--space-xxl) 0 var(--space-xl);
    overflow: hidden;
    background: var(--color-white);
}

.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(0, 102, 255, 0.18), transparent 55%),
                radial-gradient(circle at bottom left, rgba(255, 215, 0, 0.18), transparent 45%);
    pointer-events: none;
}

.page-hero .container {
    position: relative;
    z-index: 2;
}

.page-hero.homepage-hero {
    background: var(--gradient-secondary);
    color: var(--color-white);
}

.page-hero.homepage-hero::before {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.2), rgba(255, 255, 255, 0.05));
    opacity: 0.9;
}

.page-hero.internal-hero {
    background: radial-gradient(circle at top left, rgba(0, 102, 255, 0.1), rgba(255, 255, 255, 0.95));
}

.page-hero.internal-hero.courses-hero {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.18), rgba(15, 23, 42, 0.08));
}

.page-hero.internal-hero.resources-hero {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.25), rgba(0, 102, 255, 0.12));
}

.page-hero.internal-hero.about-hero {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.14), rgba(15, 23, 42, 0.1));
}

.page-hero.internal-hero.contact-hero {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.18), rgba(255, 255, 255, 0.95));
}

.page-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.page-subtitle {
    max-width: 38rem;
    font-size: clamp(1rem, 2.2vw, 1.2rem);
    color: rgba(15, 23, 42, 0.85);
    margin-bottom: var(--space-md);
}

.page-hero.homepage-hero .page-subtitle {
    color: rgba(255, 255, 255, 0.82);
}

.hero-layout {
    display: grid;
    gap: var(--space-xl);
    align-items: center;
}

.hero-content {
    display: grid;
    gap: var(--space-sm);
}

.hero-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.metric {
    background: rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    min-width: 150px;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.metric strong {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
}

.metric span {
    font-size: 0.9rem;
    opacity: 0.85;
}

.hero-media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.hero-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.05), transparent 60%);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.2rem;
    padding: 0 var(--space-md);
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: var(--transition-base);
    text-align: center;
    border: 1px solid transparent;
    gap: var(--space-xs);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), #f8c200);
    color: var(--color-secondary);
    box-shadow: 0 12px 30px rgba(255, 215, 0, 0.35);
}

.btn-primary:hover,
.btn-primary:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 16px 35px rgba(255, 215, 0, 0.45);
}

.btn-outline {
    border-color: rgba(255, 255, 255, 0.6);
    color: inherit;
    background: rgba(255, 255, 255, 0.08);
}

.btn-outline:hover,
.btn-outline:focus-visible {
    background: rgba(255, 255, 255, 0.2);
}

.btn-ghost {
    background: rgba(0, 102, 255, 0.12);
    color: var(--color-primary);
    border-color: rgba(0, 102, 255, 0.25);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
    background: rgba(0, 102, 255, 0.18);
}

.grid {
    display: grid;
    gap: var(--space-md);
}

.grid.featured-grid {
    gap: var(--space-lg);
}

.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.04), rgba(255, 215, 0, 0.07));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.card:hover::before {
    opacity: 1;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.card > * {
    position: relative;
    z-index: 2;
}

.card-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.card-title {
    font-family: var(--font-heading);
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    font-weight: 600;
    color: var(--color-secondary);
}

.card-subtitle {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.card-body {
    color: rgba(15, 23, 42, 0.85);
    font-size: 0.98rem;
    display: grid;
    gap: var(--space-sm);
}

.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.section-header {
    display: grid;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
    text-align: left;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--color-secondary);
}

.section-lead {
    font-size: clamp(1rem, 1.8vw, 1.1rem);
    color: rgba(15, 23, 42, 0.75);
    max-width: 42rem;
}

.feature-list {
    display: grid;
    gap: var(--space-xs);
    margin: 0;
    padding: 0;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xs);
    position: relative;
    padding-left: 1.75rem;
    color: rgba(15, 23, 42, 0.85);
}

.feature-list li::before {
    content: "";
    position: absolute;
    top: 0.55rem;
    left: 0;
    width: 0.65rem;
    height: 0.65rem;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: 0 0 0 6px rgba(0, 102, 255, 0.12);
}

.testimonial-grid {
    display: grid;
    gap: var(--space-md);
}

.testimonial-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.testimonial-card::before {
    content: "“";
    position: absolute;
    top: -2.5rem;
    right: 1.5rem;
    font-size: 9rem;
    color: rgba(0, 102, 255, 0.08);
    font-family: var(--font-heading);
}

.testimonial-text {
    font-size: 1.05rem;
    color: rgba(15, 23, 42, 0.8);
    margin-bottom: var(--space-md);
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
    font-weight: 600;
    color: var(--color-secondary);
}

.testimonial-role {
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.cta-banner {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.85), rgba(15, 23, 42, 0.95));
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.cta-banner::after {
    content: "";
    position: absolute;
    inset: -30% 40% 30% -20%;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.28), transparent 65%);
    transform: rotate(12deg);
}

.cta-banner-content {
    position: relative;
    z-index: 2;
    display: grid;
    gap: var(--space-md);
    max-width: 40rem;
}

.stat-band {
    display: grid;
    gap: var(--space-md);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.stat-band .stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
}

.stat-band .stat-item strong {
    font-size: clamp(1.75rem, 3vw, 2.3rem);
    color: var(--color-primary);
}

.resource-grid {
    display: grid;
    gap: var(--space-md);
}

.resource-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: var(--space-sm);
    transition: var(--transition-base);
}

.resource-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.resource-meta {
    display: flex;
    gap: var(--space-xs);
    align-items: center;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.team-grid {
    display: grid;
    gap: var(--space-md);
}

.team-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: var(--space-sm);
    text-align: center;
}

.team-photo {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto var(--space-sm);
    border: 4px solid rgba(0, 102, 255, 0.12);
}

.team-name {
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--color-secondary);
}

.team-role {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.team-bio {
    color: rgba(15, 23, 42, 0.75);
    font-size: 0.95rem;
}

.contact-wrapper {
    display: grid;
    gap: var(--space-lg);
}

.contact-grid {
    display: grid;
    gap: var(--space-lg);
}

.contact-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: var(--space-sm);
}

.contact-list {
    display: grid;
    gap: var(--space-sm);
    font-size: 1rem;
    color: rgba(15, 23, 42, 0.85);
}

.contact-list a {
    color: var(--color-primary);
    font-weight: 600;
}

.form-card {
    background: rgba(255, 255, 255, 0.92);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.form-grid {
    display: grid;
    gap: var(--space-sm);
}

.form-grid .field-group {
    display: grid;
    gap: var(--space-2xs);
}

label {
    font-weight: 600;
    color: var(--color-secondary);
    font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(0, 102, 255, 0.15);
    border-radius: var(--radius-sm);
    padding: 0.9rem 1rem;
    transition: var(--transition-base);
    box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.12);
}

textarea {
    resize: vertical;
    min-height: 8rem;
}

.details-list {
    display: grid;
    gap: var(--space-sm);
}

details {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-md);
    transition: var(--transition-base);
}

details[open] {
    box-shadow: var(--shadow-md);
}

summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 1.05rem;
    list-style: none;
    position: relative;
    padding-right: 2rem;
}

summary::marker {
    display: none;
}

summary::after {
    content: "+";
    position: absolute;
    right: 0;
    top: 0;
    font-size: 1.3rem;
    color: var(--color-primary);
    transition: transform 0.3s ease;
}

details[open] summary::after {
    transform: rotate(45deg);
}

details p {
    margin-top: var(--space-xs);
    color: rgba(15, 23, 42, 0.75);
}

.legal-article {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: var(--space-lg);
}

.legal-article section {
    display: grid;
    gap: var(--space-xs);
}

.legal-article h2 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin: 0;
    color: var(--color-secondary);
}

.legal-article p {
    margin: 0;
    color: rgba(15, 23, 42, 0.8);
    font-size: 1rem;
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    background: var(--color-white);
}

.table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.table thead {
    background: rgba(0, 102, 255, 0.08);
}

.table th,
.table td {
    text-align: left;
    padding: var(--space-sm);
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    font-size: 0.98rem;
}

.table tbody tr:hover {
    background: rgba(0, 102, 255, 0.04);
}

.site-footer {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 1));
    color: rgba(255, 255, 255, 0.82);
    padding: var(--space-xl) 0 var(--space-lg);
    margin-top: var(--space-xl);
}

.footer-grid {
    display: grid;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.footer-brand {
    max-width: 22rem;
    display: grid;
    gap: var(--space-sm);
}

.footer-brand .logo {
    color: var(--color-accent);
    font-size: 1.5rem;
}

.footer-nav {
    display: grid;
    gap: var(--space-xs);
}

.footer-heading {
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.03em;
    color: var(--color-white);
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.72);
    transition: var(--transition-base);
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
    color: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
}

.footer-contacts {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-weight: 600;
}

.footer-contacts a {
    color: var(--color-accent);
}

.cookie-banner {
    position: fixed;
    bottom: var(--space-sm);
    right: var(--space-sm);
    max-width: 420px;
    background: rgba(15, 23, 42, 0.95);
    color: var(--color-white);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    z-index: 2000;
    transform: translateY(120%);
    opacity: 0;
    transition: transform 0.5s ease, opacity 0.5s ease;
}

.cookie-banner.is-visible {
    transform: translateY(0);
    opacity: 1;
}

.cookie-banner p {
    margin-bottom: var(--space-sm);
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
}

.cookie-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    align-items: center;
}

.cookie-btn {
    flex: 1;
}

.cookie-link {
    font-size: 0.85rem;
    text-decoration: underline;
    color: rgba(255, 255, 255, 0.82);
}

.highlight {
    color: var(--color-primary);
    font-weight: 700;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: rgba(0, 102, 255, 0.12);
    color: var(--color-primary);
}

.divider {
    width: 100%;
    height: 1px;
    background: rgba(15, 23, 42, 0.08);
    margin: var(--space-lg) 0;
}

@media (min-width: 768px) {
    .hero-layout {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .grid.featured-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .testimonials .testimonial-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .resource-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .team-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .contact-grid {
        grid-template-columns: 0.9fr 1.1fr;
    }

    .footer-grid {
        grid-template-columns: 1.2fr 0.8fr 0.8fr;
    }
}

@media (min-width: 1024px) {
    .grid.featured-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .resource-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 1023px) {
    .grid.featured-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 920px) {
    .header-container {
        align-items: flex-start;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .nav-links {
        position: absolute;
        top: calc(100% + 1rem);
        right: var(--space-sm);
        flex-direction: column;
        background: var(--color-white);
        padding: var(--space-md);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md);
        width: min(280px, 95vw);
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
    }

    .nav-links.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }
}

@media (max-width: 767px) {
    .page-hero {
        padding: var(--space-xl) 0 var(--space-lg);
    }

    .card {
        padding: var(--space-md);
    }

    .cta-banner {
        padding: var(--space-lg);
    }

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

    .footer-contacts {
        flex-direction: column;
        align-items: flex-start;
    }

    .cookie-banner {
        left: var(--space-sm);
        max-width: calc(100% - 2 * var(--space-sm));
    }
}

@media (min-width: 1440px) {
    :root {
        --max-width: 1280px;
    }
}