:root {
    color-scheme: dark;
    --primary: #0A2540;
    --primary-deep: #071d32;
    --card: rgba(26, 58, 92, 0.72);
    --accent: #00D4AA;
    --accent-light: #00E5B8;
    --text: #f8fafc;
    --muted: #a7b6c8;
    --border: rgba(0, 212, 170, 0.18);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    background:
        radial-gradient(circle at 12% 18%, rgba(0, 212, 170, 0.09), transparent 30rem),
        radial-gradient(circle at 88% 62%, rgba(0, 212, 170, 0.06), transparent 32rem),
        var(--primary);
    color: var(--text);
    font-family: "Cairo", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.9;
}

a {
    color: inherit;
}

.skip-link {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 100;
    padding: 0.7rem 1rem;
    border-radius: 0.75rem;
    background: var(--accent);
    color: var(--primary);
    font-weight: 800;
    transform: translateY(-180%);
    transition: transform 0.2s ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.container {
    width: min(1120px, calc(100% - 2rem));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(10, 37, 64, 0.9);
    backdrop-filter: blur(18px);
}

.header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.brand-mark {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 0.75rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 900;
}

.brand-name {
    display: block;
    font-weight: 900;
    line-height: 1.2;
}

.brand-subtitle {
    display: block;
    color: var(--muted);
    font-family: Inter, Arial, sans-serif;
    font-size: 0.68rem;
    line-height: 1.4;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    color: #dbe4ee;
    font-size: 0.9rem;
}

.header-nav a {
    text-decoration: none;
    transition: color 0.2s ease;
}

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

main {
    padding: 4rem 0 5rem;
}

.article-shell {
    width: min(860px, 100%);
    margin-inline: auto;
}

.breadcrumbs {
    margin-bottom: 1.25rem;
    color: var(--muted);
    font-size: 0.88rem;
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
}

.breadcrumbs a {
    text-decoration: none;
}

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

.article-card {
    overflow: hidden;
    padding: clamp(1.4rem, 4vw, 3.2rem);
    border: 1px solid var(--border);
    border-radius: 1.5rem;
    background: var(--card);
    box-shadow: 0 28px 80px rgba(2, 12, 22, 0.28);
    backdrop-filter: blur(20px);
}

.category {
    display: inline-flex;
    padding: 0.3rem 0.85rem;
    border: 1px solid rgba(0, 212, 170, 0.25);
    border-radius: 999px;
    background: rgba(0, 212, 170, 0.1);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 800;
}

h1 {
    max-width: 760px;
    margin: 1rem 0;
    font-size: clamp(2rem, 6vw, 3.5rem);
    line-height: 1.35;
    letter-spacing: -0.025em;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 1.25rem;
    margin-bottom: 2rem;
    color: var(--muted);
    font-size: 0.88rem;
}

.lead {
    margin: 0 0 2.2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #dce6ef;
    font-size: clamp(1.05rem, 2.5vw, 1.2rem);
}

.article-content h2 {
    margin: 2.2rem 0 0.7rem;
    color: #fff;
    font-size: clamp(1.3rem, 3vw, 1.65rem);
    line-height: 1.5;
}

.article-content p {
    margin: 0 0 1.15rem;
    color: #cbd7e3;
}

.article-cta {
    margin-top: 3rem;
    padding: 1.35rem;
    border: 1px solid rgba(0, 212, 170, 0.25);
    border-radius: 1.1rem;
    background: rgba(0, 212, 170, 0.08);
}

.article-cta h2 {
    margin: 0 0 0.45rem;
    font-size: 1.25rem;
}

.article-cta p {
    margin: 0 0 1rem;
    color: var(--muted);
}

.primary-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0.65rem 1.2rem;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), #00b894);
    color: var(--primary);
    font-weight: 900;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-link:hover,
.primary-link:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 212, 170, 0.22);
}

.back-link {
    display: inline-flex;
    margin-top: 1.5rem;
    color: var(--accent);
    font-weight: 800;
    text-decoration: none;
}

.site-footer {
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--muted);
    text-align: center;
    font-size: 0.85rem;
}

:focus-visible {
    outline: 3px solid rgba(0, 229, 184, 0.7);
    outline-offset: 3px;
}

@media (max-width: 720px) {
    .brand-subtitle,
    .header-nav .optional-link {
        display: none;
    }

    .header-nav {
        gap: 0.85rem;
        font-size: 0.82rem;
    }

    main {
        padding-top: 2rem;
    }

    .article-card {
        border-radius: 1.15rem;
    }
}

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