:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-glow: rgba(37, 99, 235, 0.35);
    --accent: #60a5fa;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --text: #0f172a;
    --text-muted: #475569;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    --bg: #ffffff;
    --bg-alt: #f6f8fb;
    --card-bg: #ffffff;
    --header-bg: rgba(255, 255, 255, 0.85);
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.14);
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --grid-line: rgba(15, 23, 42, 0.04);
}

html[data-theme="dark"] {
    --primary: #60a5fa;
    --primary-dark: #3b82f6;
    --primary-glow: rgba(96, 165, 250, 0.25);
    --accent: #93c5fd;
    --dark: #070d1a;
    --dark-2: #0e1830;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --gray: #94a3b8;
    --gray-light: #1e2a44;
    --bg: #0a1120;
    --bg-alt: #0d1526;
    --card-bg: #101a30;
    --header-bg: rgba(10, 17, 32, 0.85);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --grid-line: rgba(148, 163, 184, 0.06);
}

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

html {
    scroll-behavior: smooth;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-alt);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-light);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

::selection {
    background: var(--primary);
    color: #fff;
}

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

img {
    max-width: 100%;
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-18px) scale(1.05);
    }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.reveal--visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--header-bg);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    border-bottom: 1px solid var(--gray-light);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 4px 14px var(--primary-glow);
    font-size: 1.2rem;
}

.logo__accent {
    color: var(--primary);
}

.logo:hover .logo__icon {
    transform: rotate(-8deg) scale(1.05);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--gray-light);
    background: var(--card-bg);
    color: var(--text);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    margin-right: 6px;
}

.theme-toggle:hover {
    border-color: var(--primary);
    transform: scale(1.08) rotate(12deg);
    box-shadow: 0 0 16px var(--primary-glow);
}

.header__right {
    display: flex;
    align-items: center;
}

.nav {
    display: flex;
    gap: 32px;
    margin-right: 20px;
}

.nav__link {
    font-weight: 500;
    color: var(--gray);
    transition: color var(--transition);
    position: relative;
    font-size: 0.95rem;
}

.nav__link::before {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
    transition: width var(--transition);
}

.nav__link:hover::before,
.nav__link--active::before {
    width: 100%;
}

.nav__link:hover,
.nav__link--active {
    color: var(--primary);
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
    border-radius: 2px;
}

.burger--active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.burger--active span:nth-child(2) {
    opacity: 0;
}

.burger--active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
    background:
        radial-gradient(ellipse 60% 50% at 20% 0%, var(--primary-glow), transparent 70%),
        radial-gradient(ellipse 50% 40% at 85% 20%, rgba(147, 197, 253, 0.12), transparent 70%),
        linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
    color: #fff;
    padding: 120px 0 110px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before,
.hero::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
    animation: float 9s ease-in-out infinite;
}

.hero::before {
    top: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(37, 99, 235, 0.25);
}

.hero::after {
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: rgba(96, 165, 250, 0.18);
    animation-delay: 3s;
}

.hero__content {
    position: relative;
    z-index: 2;
    animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 40px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    font-size: 0.85rem;
    font-weight: 600;
    color: #cbd5e1;
    margin-bottom: 28px;
    backdrop-filter: blur(8px);
}

.hero__badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    animation: blink 2s infinite;
}

.hero__title {
    font-size: clamp(2.2rem, 5.5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 22px;
    letter-spacing: -0.03em;
}

.hero__accent {
    background: linear-gradient(120deg, var(--accent), #93c5fd);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero__subtitle {
    font-size: 1.2rem;
    color: #9fb0c9;
    max-width: 640px;
    margin: 0 auto 40px;
}

.hero__buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero__buttons .btn {
    animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.hero__buttons .btn--primary { animation-delay: 0.15s; }
.hero__buttons .btn--outline { animation-delay: 0.25s; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 15px 34px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    letter-spacing: -0.01em;
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 6px 22px var(--primary-glow);
}

.btn--primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px var(--primary-glow);
    filter: brightness(1.08);
}

.btn--primary:active {
    transform: translateY(-1px);
}

.btn--outline {
    border-color: rgba(255, 255, 255, 0.35);
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(8px);
}

.btn--outline:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-3px);
}

.btn--secondary {
    background: var(--bg-alt);
    color: var(--text);
    border-color: var(--gray-light);
    padding: 13px 26px;
}

.btn--secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* Sections */
.section {
    padding: 96px 0;
    position: relative;
}

.section--alt {
    background:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
        var(--bg-alt);
    background-size: 48px 48px;
}

.section__title {
    font-size: clamp(1.8rem, 3.5vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 44px;
    position: relative;
    letter-spacing: -0.02em;
}

.section__title::after {
    content: '';
    display: block;
    width: 56px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 4px;
    margin-top: 14px;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    padding: 30px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    background: var(--card-bg);
}

.card:hover::before {
    transform: scaleX(1);
}

.card__badge {
    display: inline-block;
    width: fit-content;
    padding: 5px 14px;
    border-radius: 30px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    margin-bottom: 18px;
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.card__badge--guide {
    background: rgba(22, 163, 74, 0.1);
    color: #16a34a;
    border-color: rgba(22, 163, 74, 0.25);
}

html[data-theme="dark"] .card__badge--guide {
    color: #4ade80;
}

.card__badge--news {
    background: rgba(217, 119, 6, 0.1);
    color: #d97706;
    border-color: rgba(217, 119, 6, 0.25);
}

html[data-theme="dark"] .card__badge--news {
    color: #fbbf24;
}

.card__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

.card__title a,
.card__title:hover {
    transition: color var(--transition);
}

.card__text {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 22px;
    flex-grow: 1;
}

.card__meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--gray);
    margin-bottom: 16px;
    padding-top: 16px;
    border-top: 1px dashed var(--gray-light);
}

.card__link {
    color: var(--primary);
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.card__link::after {
    content: '→';
    transition: transform var(--transition);
}

.card__link:hover {
    color: var(--primary-dark);
    gap: 10px;
}

.card__link:hover::after {
    transform: translateX(4px);
}

/* Info block */
.info-block {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: center;
}

.info-block__text p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.info-block__text .btn {
    margin-top: 16px;
}

.info-block__stats {
    display: grid;
    gap: 20px;
}

.stat {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid var(--gray-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
}

.stat::before {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--primary-glow);
    opacity: 0.5;
}

.stat__number {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.02em;
    position: relative;
}

.stat__label {
    color: var(--gray);
    font-size: 0.95rem;
    margin-top: 4px;
    position: relative;
}

/* Article pages */
.page-header {
    background:
        radial-gradient(ellipse 70% 80% at 50% -20%, var(--primary-glow), transparent 60%),
        linear-gradient(135deg, var(--dark), var(--dark-2));
    color: #fff;
    padding: 72px 0 64px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header h1 {
    font-size: clamp(2rem, 4.5vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 14px;
    letter-spacing: -0.02em;
    animation: fadeUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-header p {
    color: #9fb0c9;
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
    animation: fadeUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.1s both;
}

.article-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.article-item {
    background: var(--card-bg);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    padding: 34px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.article-item:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-3px);
}

.article-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s ease;
}

.article-item:hover::before {
    transform: scaleY(1);
}

.article-item h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.article-item h3:hover {
    color: var(--primary);
}

.article-item p {
    color: var(--gray);
    margin-bottom: 16px;
}

.article-item__meta {
    display: flex;
    gap: 20px;
    font-size: 0.82rem;
    color: var(--gray);
    flex-wrap: wrap;
}

.article-item__meta span {
    background: var(--bg-alt);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid var(--gray-light);
}

/* About page */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    font-size: 1.6rem;
    margin: 44px 0 16px;
    color: var(--text);
    letter-spacing: -0.01em;
}

.about-content h2 .accent-bar {
    display: inline-block;
    width: 8px;
    height: 22px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    margin-right: 12px;
    vertical-align: middle;
}

.about-content p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-content ul {
    color: var(--gray);
    margin: 0 0 16px 20px;
    line-height: 2;
}

.about-content ul li {
    position: relative;
    padding-left: 28px;
    list-style: none;
}

.about-content ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

/* Footer */
.footer {
    background: var(--dark);
    color: #94a3b8;
    padding: 64px 0 0;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
}

.footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.logo--footer {
    color: #fff;
    margin-bottom: 16px;
}

.footer__desc {
    font-size: 0.95rem;
    line-height: 1.8;
    max-width: 360px;
}

.footer__heading {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 22px;
    font-weight: 700;
    position: relative;
}

.footer__heading::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    margin-top: 8px;
}

.footer__link {
    display: block;
    color: #94a3b8;
    margin-bottom: 12px;
    transition: var(--transition);
    font-size: 0.95rem;
    width: fit-content;
}

.footer__link:hover {
    color: var(--accent);
    transform: translateX(4px);
}

.footer__bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.9rem;
}

/* Cookie banner */
.cookie-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 200;
    background: var(--card-bg);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 20px 24px;
    display: none;
    min-width: 340px;
    animation: cookieIn 0.4s ease;
}

.cookie-banner--visible {
    display: block;
}

.cookie-banner__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    max-width: 900px;
    margin: 0 auto;
}

.cookie-banner__text p {
    color: var(--text);
    font-size: 0.95rem;
    margin: 0;
}

.cookie-banner__actions {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

@keyframes cookieIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Focus states */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
}

/* Responsive */
@media (max-width: 992px) {
    .info-block {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer__inner {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--header-bg);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 24px 20px;
        gap: 20px;
        border-bottom: 1px solid var(--gray-light);
        box-shadow: var(--shadow-lg);
        margin: 0;
    }

    .nav.nav--open {
        display: flex;
        animation: fadeUp 0.3s ease;
    }

    .nav__link--active::before {
        width: 100%;
    }

    .nav__link {
        font-size: 1.1rem;
    }

    .burger {
        display: flex;
    }

    .header__right {
        gap: 8px;
    }

    .hero {
        padding: 80px 0 70px;
    }

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

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

    .page-header h1 {
        font-size: 1.8rem;
    }

    .cookie-banner {
        left: 16px;
        right: 16px;
        transform: none;
        min-width: 0;
        padding: 18px 20px;
    }

    .cookie-banner--visible {
        display: block;
    }

    .cookie-banner__inner {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .cookie-banner__actions {
        justify-content: center;
    }

    @keyframes cookieIn {
        from {
            opacity: 0;
            transform: translateY(24px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .section {
        padding: 64px 0;
    }

    .stat__number {
        font-size: 2rem;
    }

    .article-item h3 {
        font-size: 1.2rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}