:root {
    --bg: #f5f6fa;
    --card: #ffffff;
    --text: #222;
    --accent: #0ea5a4;
    --accent-2: #06b6d4;
    --muted: #6b7280;
    --max-width: 1100px;
    --radius: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.5;
}

/* header */
header,
.header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
    position: relative;
    z-index: 999;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    color: #fff;
    padding: 1rem 1.25rem;
}

/* keep header content centered and constrained */
.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.title-header,
.title {
    margin: 0;
}

.title {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: #fff;
}

nav { margin-left: auto; }
nav ol {
    display: flex;
    gap: 0.65rem;
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.95rem;
}
nav ol li a {
    color: rgba(255,255,255,0.95);
    text-decoration: none;
    padding: 0.35rem 0.5rem;
    border-radius: 6px;
}
nav ol li a:hover, nav ol li a:focus {
    background: rgba(255,255,255,0.08);
    outline: 2px solid rgba(255,255,255,0.06);
}

/* main content */
main {
    max-width: var(--max-width);
    margin: 1.25rem auto;
    padding: 1rem;
}

main section h2 {
    margin-top: 0;
    color: var(--accent);
    font-size: 1.1rem;
}
main section p {
    margin: 0.25rem 0 1rem;
    color: var(--muted);
}

h1 {
    font-size: 1.5rem;
    margin: 1rem 0 0.5rem;
    color: var(--text);
}

/* categories grid */
.catagory {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.slise-list {
    background: var(--card);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: 0 6px 18px rgba(15,23,42,0.06);
}

.slise-list ul {
    padding: 0;
    margin: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.slise-list ul li a {
    display: block;
    padding: 0.5rem 0.6rem;
    border-radius: 6px;
    background: linear-gradient(180deg, rgba(14,165,164,0.04), transparent);
    color: var(--text);
    text-decoration: none;
    border: 1px solid rgba(15,23,42,0.03);
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.slise-list ul li a:hover, .slise-list ul li a:focus {
    background: var(--accent);
    color: #fff;
    border-color: rgba(255,255,255,0.08);
    transform: translateY(-2px);
    box-shadow: 0 8px 26px rgba(14,165,164,0.12);
}

.slise-list ul li a:active { transform: none; }

/* utility focus style for keyboard users */
a:focus { outline: 3px solid rgba(14,165,164,0.15); outline-offset: 2px; }

/* responsive tweaks */
@media (max-width: 640px) {
    .header-inner { gap: 0.6rem; }
    .title-header h1 { font-size: 1rem; }
    h1 { font-size: 1.25rem; }
    nav { margin-left: 8px; }
}

/* small helpers */
.text-muted { color: var(--muted); font-size: 0.95rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }