/* ── Crash Course dialog size ── */
.crash-dialog {
    width: 720px;
    height: 580px;
}

/* ── Tab strip ── */
.tab-strip {
    display: flex;
    gap: 3px;
    padding: 6px 8px 0;
    background: #c0c0c0;
    border-bottom: 2px solid #808080;
    flex-shrink: 0;
    box-shadow: 0 1px 0 white;
}

/* Individual tab button */
.cc-tab {
    padding: 4px 16px 5px;
    background: #c0c0c0;
    border-top: 2px solid white;
    border-left: 2px solid white;
    border-right: 2px solid #808080;
    border-bottom: none;
    font-size: 12px;
    font-family: "MS Sans Serif", "Microsoft Sans Serif", Arial, sans-serif;
    cursor: pointer;
    position: relative;
    bottom: -2px;
    color: #000;
    white-space: nowrap;
}

.cc-tab:hover:not(.active) {
    background: #d4d4d4;
}

/* Active tab sits flush against the content area — no bottom border */
.cc-tab.active {
    background: #c0c0c0;
    z-index: 10;
    padding-bottom: 8px;
    border-bottom: 2px solid #c0c0c0;
    font-weight: bold;
}

/* ── Tab content panels ── */
.cc-panel {
    display: none;
    flex: 1;
    padding: 10px 12px;
    overflow: hidden;
    min-height: 0;
}

.cc-panel.active {
    display: flex;
    flex-direction: column;
}

/* Scrollable content box inside each panel */
.cc-panel .win98-textbox {
    flex: 1;
    overflow-y: scroll;
}

/* Tighten up heading spacing inside the course */
.cc-panel .win98-textbox h2 {
    font-size: 14px;
    margin-bottom: 8px;
    color: #000080;
    border-bottom: 1px solid #808080;
    padding-bottom: 4px;
}

.cc-panel .win98-textbox h3 {
    font-size: 12px;
    margin: 12px 0 4px;
    color: #000;
    font-weight: bold;
}

.cc-panel .win98-textbox p {
    margin-bottom: 6px;
    line-height: 1.6;
}

.cc-panel .win98-textbox ul {
    padding-left: 20px;
    margin-bottom: 8px;
}

.cc-panel .win98-textbox li {
    margin-bottom: 4px;
    line-height: 1.5;
}

/* ── Inline superscript citations ── */
sup.cite {
    font-size: 9px;
    line-height: 0;
    vertical-align: super;
    margin-left: 1px;
}

sup.cite a {
    color: #000080;
    text-decoration: none;
    font-family: "MS Sans Serif", "Microsoft Sans Serif", Arial, sans-serif;
    cursor: pointer;
}

sup.cite a:hover {
    text-decoration: underline;
    color: #0000cc;
}

/* Flash highlight when a ref is jumped to */
@keyframes ref-flash {
    0%   { background: #ffff88; }
    70%  { background: #ffff88; }
    100% { background: transparent; }
}

.ref-highlight {
    animation: ref-flash 1.8s ease forwards;
    border-radius: 2px;
}

/* ── IEEE reference list ── */
.src-note {
    font-size: 11px;
    color: #555;
    margin-bottom: 10px;
    font-style: italic;
}

.ieee-list {
    list-style: decimal;
    padding-left: 28px;
    margin: 0;
}

.ieee-list li {
    font-size: 12px;
    line-height: 1.65;
    margin-bottom: 10px;
    color: #000;
    padding-left: 4px;
}

.ieee-list li em {
    font-style: italic;
}

/* ── Footer bar ── */
.cc-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 12px 8px;
    border-top: 1px solid #808080;
    flex-shrink: 0;
}

.cc-progress {
    font-size: 11px;
    color: #444;
    font-family: "MS Sans Serif", "Microsoft Sans Serif", Arial, sans-serif;
}

.cc-footer-btns {
    display: flex;
    gap: 6px;
}