/* Reset et variables */
:root {
    --bg: #f6f7fb;
    --card: #ffffff;
    --text: #0f172a;
    --muted: #475569;
    --primary: #4f46e5;
    /* indigo */
    --primary-600: #4338ca;
    --ring: rgba(79, 70, 229, 0.2);
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 12px rgba(16, 24, 40, 0.08);
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
    color: var(--text);
    background: linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.skip-link:focus {
    position: fixed;
    left: 1rem;
    top: 1rem;
    width: auto;
    height: auto;
    padding: .5rem .75rem;
    background: var(--card);
    border-radius: .5rem;
    box-shadow: var(--shadow);
}

.container {
    width: min(1100px, 92vw);
    margin: 0 auto;
}

.site-header {
    padding: 3rem 0 2rem;
}

.header-content {
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: 1.25rem;
    align-items: center;
}

.avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #a78bfa, #4f46e5);
    color: white;
    display: grid;
    place-items: center;
    font-weight: 700;
    letter-spacing: .5px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 50%;
}

.bio .name {
    margin: 0;
    font-size: clamp(1.5rem, 2vw + 1rem, 2.2rem);
}

.bio .role {
    margin: .25rem 0 .5rem;
    color: var(--primary-600);
    font-weight: 600;
}

.bio .summary {
    margin: 0;
    color: var(--muted);
}

.main-content {
    padding: 1rem 0 4rem;
    flex: 1 0 auto;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.card {
    background: var(--card);
    border-radius: 14px;
    padding: 1.25rem;
    box-shadow: var(--shadow);
    transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    will-change: transform;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(16, 24, 40, 0.12);
}

.card:focus-within {
    outline: 2px solid var(--ring);
    outline-offset: 2px;
}

.card-title {
    margin: 0 0 .5rem;
    font-size: 1.1rem;
}

.card-desc {
    margin: 0 0 .9rem;
    color: var(--muted);
}

.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
}

.btn {
    appearance: none;
    border: 1px solid #e2e8f0;
    background: #f8fafc;
    color: var(--text);
    padding: .55rem .9rem;
    border-radius: 10px;
    font-weight: 500;
    text-decoration: none;
    transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

.btn:hover {
    background: #eef2f7;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn.primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.btn.primary:hover {
    background: var(--primary-600);
}

.btn.ghost {
    background: transparent;
}

.site-footer {
    padding: 2rem 0;
    color: var(--muted);
    border-top: 1px solid #e5e7eb;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: saturate(1.2) blur(8px);
}

.scroll-top {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    width: 44px;
    height: 44px;
    border-radius: 999px;
    border: none;
    color: #fff;
    background: var(--primary);
    box-shadow: 0 10px 20px rgba(79, 70, 229, .35);
    cursor: pointer;
    transform: translateY(120%);
    opacity: 0;
    transition: transform .3s ease, opacity .3s ease, background .2s ease;
}

.scroll-top.show {
    transform: translateY(0);
    opacity: 1;
}

.scroll-top:hover {
    background: var(--primary-600);
}

/* Responsif */
@media (max-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .header-content {
        grid-template-columns: 56px 1fr;
    }

    .avatar {
        width: 56px;
        height: 56px;
        font-size: .95rem;
    }

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