:root {
    /* Italia 2026 palette — mediterranean blue + tuscan terracotta */
    --brand: #2E7DAF;          /* mediterranean blue */
    --brand-mid: #1F5C85;      /* darker blue */
    --brand-deep: #0F2D4A;     /* deep navy — header / footer */
    --brand-soft: #E8F1F8;     /* light sky — hover, code bg, blockquote */
    --brand-light: #A8C8E0;    /* subtle accent */
    --accent: #C45A2E;         /* terracotta — highlights */
    --accent-soft: #F8E8DD;    /* light terracotta */

    --white: #FFFFFF;
    --off-white: #FAFAFC;
    --gray: #6C757D;
    --dark-gray: #2B2B2B;
    --light-gray: #E2E8EE;
    --warn: #E0A040;
    --ok: #4A9A6E;
    --danger: #C24747;

    --content-max: 920px;
    --sidebar-w: 280px;
    --header-h: 138px;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.65;
    color: var(--dark-gray);
    background: var(--off-white);
    -webkit-font-smoothing: antialiased;
}

/* ============ HEADER ============ */
.trip-header {
    background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand-mid) 100%);
    color: var(--white);
    border-bottom: 4px solid var(--brand);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(15, 45, 74, 0.22);
}
.trip-header .brand {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 14px 32px 10px;
    max-width: 1400px;
    margin: 0 auto;
    text-decoration: none;
    color: inherit;
}
.trip-header .brand-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.trip-header .institution {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.3px;
}
.trip-header .department {
    font-size: 13px;
    font-weight: 400;
    color: var(--brand-soft);
    letter-spacing: 0.4px;
}
.trip-header .course-bar {
    background: rgba(0, 0, 0, 0.22);
    padding: 8px 32px;
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 13px;
    max-width: 1400px;
    margin: 0 auto;
    align-items: center;
}
.trip-header .course-bar .course {
    font-weight: 600;
    color: var(--white);
    text-decoration: none;
    border-bottom: 1px dashed transparent;
    transition: border-color 0.15s;
}
.trip-header .course-bar .course:hover { border-bottom-color: var(--brand-soft); }
.trip-header .course-bar .year {
    background: var(--accent);
    color: var(--white);
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 600;
}
.trip-header .course-bar .instructor {
    color: var(--brand-soft);
    margin-left: auto;
}

/* ============ PHASE NAV ============ */
.phase-nav {
    background: rgba(0, 0, 0, 0.32);
    padding: 6px 32px;
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 4px;
    overflow-x: auto;
}
.phase-nav a {
    color: var(--brand-soft);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12.5px;
    font-weight: 600;
    white-space: nowrap;
    transition: all 0.15s;
}
.phase-nav a:hover { background: rgba(255,255,255,0.08); color: var(--white); }
.phase-nav a.active {
    background: var(--brand);
    color: var(--white);
}

/* ============ VIEW SWITCHER ============ */
.view-switcher {
    display: inline-flex;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    padding: 3px;
    gap: 2px;
    border: 1px solid rgba(255, 255, 255, 0.18);
}
.view-switcher button {
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: inherit;
    color: var(--brand-soft);
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.15s;
}
.view-switcher button:hover { color: var(--white); background: rgba(255,255,255,0.08); }
.view-switcher button.active { background: var(--white); color: var(--brand-deep); }
.view-pane[data-view="summary"] { display: block; }
.view-pane[data-view="full"]    { display: none; }
body.view-full .view-pane[data-view="summary"] { display: none; }
body.view-full .view-pane[data-view="full"]    { display: block; }

/* ============ LAYOUT ============ */
.layout {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    max-width: 1400px;
    margin: 0 auto;
    gap: 0;
}
.layout > * { min-width: 0; }

/* ============ SIDEBAR / TOC ============ */
.toc-sidebar {
    position: sticky;
    top: var(--header-h);
    align-self: start;
    height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 24px 18px 24px 28px;
    border-right: 1px solid var(--light-gray);
    background: var(--white);
    font-size: 14px;
}
.toc-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--gray);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--brand);
}
.toc-sidebar ul { list-style: none; padding-left: 0; margin: 0; }
.toc-sidebar ul ul {
    padding-left: 14px;
    margin-top: 4px;
    border-left: 2px solid var(--light-gray);
}
.toc-sidebar li { margin: 4px 0; }
.toc-sidebar a {
    color: var(--dark-gray);
    text-decoration: none;
    display: block;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.15s;
    font-size: 13px;
    line-height: 1.4;
    overflow-wrap: anywhere;
    word-break: break-word;
}
.toc-sidebar a:hover { background: var(--brand-soft); color: var(--brand-deep); }
.toc-sidebar > ul > li > a { font-weight: 600; color: var(--brand-deep); }

/* ============ MAIN CONTENT ============ */
.content {
    padding: 40px 56px 80px;
    max-width: calc(var(--content-max) + 112px);
    background: var(--white);
    min-height: calc(100vh - var(--header-h));
}
.content > article > .doc-subtitle {
    color: var(--gray);
    font-size: 15px;
    margin: -12px 0 24px;
    line-height: 1.5;
    max-width: 720px;
}

/* ============ TYPOGRAPHY ============ */
h1, h2, h3, h4, h5, h6 {
    color: var(--brand-deep);
    font-weight: 700;
    line-height: 1.3;
    scroll-margin-top: calc(var(--header-h) + 20px);
}
h1 {
    font-size: 32px;
    border-bottom: 3px solid var(--brand);
    padding-bottom: 12px;
    margin: 0 0 24px;
}
h2 {
    font-size: 24px;
    margin: 40px 0 16px;
    padding-left: 14px;
    border-left: 5px solid var(--brand);
}
h3 {
    font-size: 19px;
    margin: 32px 0 12px;
    color: var(--brand-mid);
}
h4 {
    font-size: 16px;
    margin: 24px 0 10px;
    color: var(--brand-mid);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
p { margin: 12px 0; }
strong { color: var(--brand-deep); font-weight: 700; }
em { color: var(--brand-mid); }
a {
    color: var(--brand);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s;
    overflow-wrap: anywhere;
    word-break: break-word;
}
a:hover { border-bottom-color: var(--brand); }

/* ============ LISTS ============ */
ul, ol { padding-left: 24px; margin: 12px 0; }
li { margin: 6px 0; }
li > p { margin: 4px 0; }
ul li::marker { color: var(--brand); }
ol li::marker { color: var(--brand-deep); font-weight: 700; }

/* ============ CODE ============ */
code {
    font-family: var(--font-mono);
    font-size: 0.92em;
    background: var(--brand-soft);
    color: var(--brand-deep);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--light-gray);
    overflow-wrap: anywhere;
    word-break: break-word;
}
pre code { overflow-wrap: normal; word-break: normal; }
pre {
    background: #0F2D4A;
    color: #E2E8F0;
    padding: 18px 22px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 13.5px;
    line-height: 1.55;
    border-left: 4px solid var(--accent);
    margin: 18px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
pre code { background: transparent; color: inherit; padding: 0; border: none; font-size: inherit; }

/* ============ TABLES ============ */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 18px 0;
    font-size: 14px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    border-radius: 6px;
    overflow: hidden;
    display: block;
    overflow-x: auto;
}
th {
    background: var(--brand-deep);
    color: var(--white);
    text-align: left;
    padding: 10px 14px;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--light-gray);
    vertical-align: top;
}
tr:nth-child(even) td { background: var(--off-white); }
tr:hover td { background: var(--brand-soft); }

/* ============ BLOCKQUOTE ============ */
blockquote {
    margin: 18px 0;
    padding: 14px 22px;
    background: var(--brand-soft);
    border-left: 5px solid var(--brand);
    color: var(--dark-gray);
    border-radius: 0 6px 6px 0;
}
blockquote p { margin: 6px 0; }

/* ============ HORIZONTAL RULES ============ */
hr {
    border: none;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--brand), transparent);
    margin: 36px 0;
}

/* ============ BADGES / CALLOUTS ============ */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.badge-ok      { background: #DCEEE1; color: var(--ok); }
.badge-warn    { background: #FBE9C9; color: #8A5A0B; }
.badge-danger  { background: #FADADA; color: var(--danger); }
.badge-info    { background: var(--brand-soft); color: var(--brand-deep); }
.badge-accent  { background: var(--accent-soft); color: var(--accent); }

.callout {
    margin: 20px 0;
    padding: 14px 18px 14px 20px;
    border-left: 5px solid var(--brand);
    background: var(--brand-soft);
    border-radius: 0 6px 6px 0;
}
.callout.warn   { border-left-color: var(--warn); background: #FBF3E1; }
.callout.danger { border-left-color: var(--danger); background: #FADADA; }
.callout.ok     { border-left-color: var(--ok); background: #DCEEE1; }
.callout.accent { border-left-color: var(--accent); background: var(--accent-soft); }
.callout > h4:first-child { margin-top: 0; }

/* ============ DAY CARD ============ */
.day-card {
    border: 1px solid var(--light-gray);
    border-radius: 10px;
    padding: 18px 22px;
    margin: 22px 0;
    background: var(--white);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.day-card h3 {
    margin-top: 0;
    color: var(--brand-deep);
    border-bottom: 2px dashed var(--brand-light);
    padding-bottom: 8px;
}
.day-card .day-meta {
    color: var(--gray);
    font-size: 13px;
    margin-bottom: 8px;
}

/* ============ STATS GRID (hub) ============ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin: 22px 0;
}
.stat {
    border: 1px solid var(--light-gray);
    border-radius: 10px;
    padding: 16px 18px;
    background: var(--white);
}
.stat .label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray);
    font-weight: 600;
}
.stat .value {
    font-size: 26px;
    font-weight: 700;
    color: var(--brand-deep);
    margin-top: 4px;
}
.stat .sub {
    font-size: 12px;
    color: var(--gray);
    margin-top: 2px;
}

/* ============ PHASE CARDS (hub) ============ */
.phase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin: 24px 0;
}
.phase-card {
    border: 1px solid var(--light-gray);
    border-radius: 10px;
    padding: 18px 20px;
    background: var(--white);
    text-decoration: none;
    color: var(--dark-gray);
    transition: all 0.15s;
    display: block;
    position: relative;
    overflow: hidden;
}
.phase-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--brand), var(--accent));
}
.phase-card:hover {
    border-color: var(--brand);
    box-shadow: 0 6px 18px rgba(15,45,74,0.10);
    transform: translateY(-2px);
    border-bottom-color: var(--brand) !important;
}
.phase-card h3 { margin: 6px 0 4px; color: var(--brand-deep); }
.phase-card .meta {
    color: var(--gray);
    font-size: 13px;
    margin-bottom: 10px;
}
.phase-card .desc { font-size: 14px; color: var(--dark-gray); }
.phase-card .status {
    margin-top: 12px;
    font-size: 12px;
    color: var(--ok);
    font-weight: 600;
}

/* ============ FOOTER ============ */
.trip-footer {
    background: var(--brand-deep);
    color: var(--brand-soft);
    padding: 24px 32px;
    text-align: center;
    font-size: 13px;
    border-top: 4px solid var(--brand);
}
.trip-footer a { color: var(--brand-soft); border-bottom: 1px solid rgba(232,241,248,0.4); }
.trip-footer a:hover { border-bottom-color: var(--white); color: var(--white); }

/* ============ RESPONSIVE ============ */
@media (max-width: 980px) {
    .layout { grid-template-columns: 1fr; }
    .toc-sidebar {
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--light-gray);
        padding: 18px 24px;
    }
    .content { padding: 28px 24px 60px; }
    .trip-header .brand { padding: 12px 18px 8px; }
    .trip-header .course-bar { padding: 8px 18px; }
    .phase-nav { padding: 6px 18px; }
}

/* ============ PRINT ============ */
@media print {
    body { background: var(--white); }
    .toc-sidebar, .trip-footer, .phase-nav, .view-switcher { display: none; }
    .trip-header { position: static; }
    .layout { display: block; }
    .content { padding: 0; }
    a { color: var(--brand-deep); }
    .view-pane[data-view="summary"], .view-pane[data-view="full"] { display: block !important; }
}