/* ==========================================================================
   COLORI
   ========================================================================== */
:root {
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-sidebar: #2e1065;
    --text-sidebar: #f5f3ff;
    --text-sidebar-muted: #c4b5fd;
    --text-main: #1e293b;
    --text-muted: #475569;
    --primary: #5d3a9b;
    --accent-bg: #f5f3ff;
    --border-color: #e2e8f0;
    --success-bg: #dcfce7;
    --success-text: #166534;
    --notstarted-bg: #fee2e2;
    --notstarted-text: #991b1b;
    --inprogress-bg: #fef3c7;
    --inprogress-text: #78350f;
    --sidebar-hover-bg: rgba(255, 255, 255, 0.1);
    --sidebar-border: rgba(255, 255, 255, 0.15);
    --btn-outline-border: rgba(255, 255, 255, 0.3);
    --radius-md: 10px;
    --radius-sm: 6px;
    --shadow-sm: 0 1px 3px rgba(46, 16, 101, 0.06), 0 1px 2px rgba(46, 16, 101, 0.04);
}

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

html {
    scroll-behavior: smooth;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.5;
}

body {
    display: grid;
    grid-template-columns: 290px 1fr;
    min-height: 100vh;
}

a:focus-visible,
summary:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ==========================================================================
   SIDEBAR
   ========================================================================== */
.sidebar {
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
    padding: 2rem 1.5rem;
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow-y: auto;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.logo {
    width: 100px;
    height: 100px;
}

.group-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.course-tag {
    font-size: 0.8rem;
    color: var(--text-sidebar-muted);
}

.main-nav {
    margin-bottom: auto;
}

.nav-title {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-sidebar-muted);
    margin: 1.25rem 0 0.5rem;
    font-weight: 600;
}

.main-nav ul {
    list-style: none;
}

.main-nav li {
    margin-bottom: 0.25rem;
}

.main-nav a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.75rem;
    color: var(--text-sidebar);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    transition: background-color 0.15s ease;
}

.main-nav a:hover {
    background-color: var(--sidebar-hover-bg);
}

.step-num {
    font-size: 0.75rem;
    font-family: monospace;
    background-color: var(--sidebar-border);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
}

.sidebar-footer {
    border-top: 1px solid var(--sidebar-border);
    padding-top: 1.25rem;
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.meta-block {
    display: flex;
    flex-direction: column;
}

.meta-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--text-sidebar-muted);
}

.meta-value {
    font-size: 0.88rem;
    font-weight: 500;
}

.external-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.btn-outline {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0.45rem 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-sidebar);
    border: 1px solid var(--btn-outline-border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-outline:hover {
    background-color: var(--sidebar-border);
    border-color: var(--bg-surface);
}

/* ==========================================================================
   CONTENUTI PRINCIPALI
   ========================================================================== */
.content {
    padding: 2.5rem 3rem;
    max-width: 1140px;
    width: 100%;
    margin: 0 auto;
}

.hero-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    margin-bottom: 2.5rem;
    box-shadow: var(--shadow-sm);
}

.hero-card h2 {
    font-size: 1.75rem;
    margin: 0.5rem 0;
    letter-spacing: -0.02em;
}

.hero-desc {
    color: var(--text-muted);
}

/* ==========================================================================
   MILESTONE E CARD
   ========================================================================== */
.milestone-section {
    margin-bottom: 3rem;
    scroll-margin-top: 2rem;
}

.milestone-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
}

.milestone-tag {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--primary);
    letter-spacing: 0.05em;
}

.milestone-header h2 {
    font-size: 1.4rem;
    letter-spacing: -0.01em;
}

.milestone-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 1.5rem;
    align-items: start;
}

.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.card h3 {
    font-size: 1.05rem;
    margin-bottom: 1rem;
}

/* ==========================================================================
   BADGE E LISTA DOCUMENTI
   ========================================================================== */
.badge {
    padding: 0.25rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 999px;
}

.badge-active {
    background-color: var(--accent-bg);
    color: var(--primary);
}

.badge-success {
    background-color: var(--success-bg);
    color: var(--success-text);
}

.badge-inprogress {
    background-color: var(--inprogress-bg);
    color: var(--inprogress-text);
}

.badge-notstarted {
    background-color: var(--notstarted-bg);
    color: var(--notstarted-text);
}

.doc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.doc-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.92rem;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.doc-list a:hover {
    border-color: var(--primary);
    background-color: var(--accent-bg);
}

.doc-version {
    font-family: monospace;
    font-size: 0.78rem;
    color: var(--text-muted);
    background-color: var(--bg-body);
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.no-docs {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0.2rem 0 0.65rem;
}

/* ==========================================================================
   ACCORDION VERBALI
   ========================================================================== */
.accordion {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    background-color: var(--bg-body);
}

.accordion:last-child {
    margin-bottom: 0;
}

.accordion summary {
    padding: 0.75rem 1rem;
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    user-select: none;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion summary::-webkit-details-marker {
    display: none;
}

.accordion summary::after {
    content: "+";
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 700;
}

.accordion[open] summary::after {
    content: "−";
}

.accordion[open] summary {
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-surface);
}

.doc-list.compact {
    padding: 0.75rem;
    background-color: var(--bg-surface);
}

/* ==========================================================================
   TEAM E FOOTER
   ========================================================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 1rem;
}

.member-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.15rem;
    box-shadow: var(--shadow-sm);
}

.member-name {
    font-weight: 600;
    font-size: 0.98rem;
}

.member-id {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0.2rem 0 0.65rem;
}

.member-link {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
}

.member-link:hover {
    text-decoration: underline;
}

.site-footer {
    margin-top: 4rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

#copyright {
    font-weight: bold;
    margin-top: 0.5rem;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 960px) {

    body {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: relative;
        height: auto;
        padding: 1.5rem;
    }

    .content {
        padding: 1.5rem;
    }

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