:root {
     --bg: #0f172a;
     --card-bg: #1e293b;
     --accent: #3b82f6;
     --text: #f1f5f9;
     --text-dim: #94a3b8;
     --warning: #ef4444;
     --sidebar-width: 200px;
 }

 body {
     font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
     background-color: var(--bg);
     color: var(--text);
     line-height: 1.6;
     margin: 0;
     padding: 0;
     display: flex;
 }

 .sidebar {
     width: var(--sidebar-width);
     height: 100vh;
     position: fixed;
     left: 0;
     top: 0;
     background: rgba(15, 23, 42, 0.8);
     backdrop-filter: blur(10px);
     border-right: 1px solid rgba(148, 163, 184, 0.1);
     padding: 40px 20px;
     display: flex;
     flex-direction: column;
     gap: 15px;
     z-index: 100;
 }

.sidebar-group-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    cursor: pointer;
    background: none;
    border: none;
    outline: none;
    position: relative; /* limit ::before hover background to this button only */
}

.sidebar-group-toggle:hover {
    color: var(--accent);
}

.sidebar-group-toggle::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background: radial-gradient(circle at 0 0, rgba(59,130,246,0.4), transparent 55%);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.sidebar-group-toggle span {
    position: relative;
    z-index: 1;
}

.sidebar-group-toggle:hover::before {
    opacity: 1;
}

.sidebar-group-chevron {
    font-size: 0.7rem;
    color: var(--text-dim);
    transition: transform 0.2s ease;
}

.sidebar-group-toggle[aria-expanded="true"] .sidebar-group-chevron {
    transform: rotate(90deg);
}

.sidebar-group {
    margin-bottom: 8px;
}

.sidebar-group-links {
    margin-left: 8px;
    display: none;
    flex-direction: column;
}

.sidebar-group-links a {
    font-size: 0.85rem;
    padding: 4px 0;
    border-radius: 6px;
    position: relative;
    transition: color 0.2s ease, transform 0.15s ease, background 0.15s ease;
}

.sidebar-group-links a:hover {
    color: var(--accent);
    transform: translateX(2px);
    background: rgba(15,23,42,0.8);
}

.sidebar-group-links[data-open="true"] {
    display: flex;
}

.is-hidden {
    display: none !important;
}

.sidebar-divider {
    height: 1px;
    margin: 12px 0 8px;
    background: rgba(148, 163, 184, 0.25);
}

.sidebar-current {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-current-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
}

.sidebar-current-links {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-left: 4px;
}

.sidebar-current-links a {
    font-size: 0.85rem;
    padding: 3px 6px;
    border-radius: 999px;
    background: rgba(15,23,42,0.6);
    color: var(--text-dim);
    transition: background 0.18s ease, color 0.18s ease, transform 0.12s ease;
}

.sidebar-current-links a:hover {
    background: linear-gradient(135deg, rgba(59,130,246,0.9), rgba(56,189,248,0.9));
    color: #ffffff;
    transform: translateX(2px);
}

 .sidebar a {
     color: var(--text-dim);
     text-decoration: none;
     font-size: 0.9rem;
     transition: color 0.3s;
     padding: 5px 0;
 }

 .sidebar a:hover {
     color: var(--accent);
 }

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
}

.sidebar-title {
    font-weight: bold;
    color: var(--text);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1px;
}

.sidebar-home-link {
    font-size: 0.8rem;
    color: var(--accent);
    padding: 0;
}

 .container {
    max-width: 1000px;
     margin: 0 auto;
     padding: 40px 20px 40px calc(var(--sidebar-width) + 40px);
     flex: 1;
 }

 header {
     display: flex;
     flex-direction: column;
     align-items: center;
     padding-bottom: 60px;
     border-bottom: 1px solid var(--card-bg);
     margin-bottom: 40px;
     gap: 40px;
 }

 .header-logos {
     display: flex;
     justify-content: space-between;
     align-items: center;
     width: 100%;
     gap: 20px;
 }

 .company-logo-link {
     flex: 1;
     display: flex;
     justify-content: flex-start;
 }

 .company-logo {
     max-height: 80px;
     width: auto;
     opacity: 0.6;
     transition: opacity 0.3s, transform 0.3s;
 }

 .company-logo:hover {
     opacity: 1;
     transform: scale(1.02);
 }

 .dev-logos-container {
     flex: 1;
     display: flex;
     flex-direction: column;
     align-items: flex-end;
     gap: 15px;
 }

 .dev-logo-item {
     display: flex;
     align-items: center;
     gap: 15px;
     opacity: 0.8;
     transition: opacity 0.3s;
 }

 .dev-logo-item:hover {
     opacity: 1;
 }

 .dev-logo-icon {
     height: 60px;
     width: auto;
 }

 .dev-logo-text {
     height: 40px;
     width: auto;
 }

 .header-main {
     text-align: center;
 }

.hero-banner {
    margin-top: 24px;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    max-height: 260px;
    box-shadow: 0 22px 45px rgba(0, 0, 0, 0.65);
}

.hero-banner img {
    width: 100%;
    max-width: 100%;
    display: block;
    object-fit: cover;
    transform: translateY(-12%);
}

.hero-banner::after {
    content: "";
    position: absolute;
    inset: 55% 0 0 0;
    background: linear-gradient(to bottom, rgba(15,23,42,0) 0%, rgba(15,23,42,0.9) 45%, rgba(15,23,42,1) 100%);
}

@keyframes heroFadeIn {
    0% {
        opacity: 0;
        transform: translateY(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes cardFadeInUp {
    0% {
        opacity: 0;
        transform: translateY(12px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.tabs-nav {
    margin-top: 24px;
    display: inline-flex;
    gap: 8px;
    padding: 4px;
    border-radius: 999px;
    background: radial-gradient(circle at 0 0, rgba(59,130,246,0.25), transparent 60%);
    border: 1px solid rgba(148,163,184,0.35);
    box-shadow: 0 10px 25px rgba(15,23,42,0.8);
}

.tab-link {
    border: none;
    outline: none;
    background: transparent;
    color: var(--text-dim);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
    text-decoration: none;
}

.tab-link:hover {
    background: rgba(15,23,42,0.9);
    color: var(--accent);
    transform: translateY(-1px);
}

.tab-link--primary {
    background: linear-gradient(135deg, #2563eb, #38bdf8);
    color: white;
    box-shadow: 0 6px 18px rgba(37,99,235,0.55);
}

.tab-link--primary:hover {
    background: linear-gradient(135deg, #1d4ed8, #0ea5e9);
    color: white;
}

.top-search-bar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 24px;
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(15,23,42,0.9);
    border-radius: 999px;
    padding: 6px 14px;
    border: 1px solid rgba(148,163,184,0.4);
    box-shadow: 0 0 0 1px rgba(15,23,42,0.8), 0 8px 20px rgba(15,23,42,0.6);
}

.search-input-wrapper input {
    border: none;
    outline: none;
    background: transparent;
    color: var(--text);
    font-size: 0.9rem;
    width: 220px;
}

.search-input-wrapper input::placeholder {
    color: var(--text-dim);
}

.search-icon {
    font-size: 0.85rem;
    color: var(--text-dim);
}

 h1 {
     font-size: 3rem;
     margin: 0;
     color: var(--accent);
     letter-spacing: -1px;
    animation: heroFadeIn 0.6s ease-out forwards;
 }

 .subtitle {
     font-size: 1.2rem;
     color: var(--text-dim);
     margin-top: 10px;
 }

 section {
     background: var(--card-bg);
     padding: 30px;
     border-radius: 12px;
     margin-bottom: 30px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
    animation: cardFadeInUp 0.5s ease-out forwards;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

section::before {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: 12px;
    border: 1px solid rgba(148,163,184,0.1);
    pointer-events: none;
}

section:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 35px rgba(15,23,42,0.9);
 }

 h2 {
     color: var(--accent);
     margin-top: 0;
     font-size: 1.5rem;
     display: flex;
     align-items: center;
     gap: 10px;
 }

 h2::after {
     content: "";
     flex: 1;
     height: 1px;
     background: rgba(148, 163, 184, 0.2);
 }

 .settings-img-container {
     margin: 20px 0;
     text-align: center;
 }

 .settings-img {
     max-width: 100%;
     border-radius: 8px;
     border: 1px solid rgba(255,255,255,0.1);
     box-shadow: 0 4px 12px rgba(0,0,0,0.5);
 }

 .img-caption {
     font-size: 0.85rem;
     color: var(--text-dim);
     margin-top: 10px;
     font-style: italic;
 }

 .settings-details {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
     gap: 20px;
     margin-top: 25px;
 }

 .detail-card {
     background: rgba(15, 23, 42, 0.3);
     padding: 15px;
     border-radius: 8px;
     border: 1px solid rgba(148, 163, 184, 0.1);
 }

 .detail-card h3 {
     margin-top: 0;
     font-size: 1rem;
     color: var(--accent);
     border-bottom: 1px solid rgba(59, 130, 246, 0.2);
     padding-bottom: 5px;
 }

 .detail-card p {
     font-size: 0.9rem;
     margin-bottom: 0;
 }

 ol, ul {
     padding-left: 20px;
 }

 li {
     margin-bottom: 15px;
 }

 .important-box {
     border-left: 4px solid var(--warning);
     background: rgba(239, 68, 68, 0.1);
     padding: 20px;
     border-radius: 0 8px 8px 0;
     margin: 25px 0;
 }

 .important-box strong {
     color: var(--warning);
     display: block;
     margin-bottom: 5px;
     text-transform: uppercase;
     font-size: 0.9rem;
 }

 .faq-item {
     margin-bottom: 25px;
     border-bottom: 1px solid rgba(148, 163, 184, 0.1);
     padding-bottom: 20px;
 }

 .faq-item:last-child {
     border: none;
 }

 .faq-q {
     font-weight: 600;
     color: var(--accent);
     display: block;
     margin-bottom: 8px;
     font-size: 1.1rem;
 }

 code {
     background: #000;
     padding: 2px 6px;
     border-radius: 4px;
     font-family: 'Consolas', monospace;
     font-size: 0.9em;
     color: #e2e8f0;
 }

 .step {
     margin-bottom: 30px;
     padding-bottom: 20px;
     border-bottom: 1px solid rgba(148, 163, 184, 0.1);
 }

 .step:last-child {
     border-bottom: none;
     margin-bottom: 0;
     padding-bottom: 0;
 }

 .step h3 {
     color: var(--accent);
     font-size: 1.2rem;
     margin-top: 0;
 }

 .step ul {
     list-style-type: none;
     padding-left: 0;
 }

 .step li {
     margin-bottom: 10px;
     position: relative;
     padding-left: 20px;
 }

 .step li::before {
     content: "•";
     color: var(--accent);
     position: absolute;
     left: 0;
     font-weight: bold;
 }

 footer {
     text-align: center;
     color: var(--text-dim);
     margin-top: 60px;
     font-size: 0.9rem;
 }