:root {
    --bg: #0f1411;
    --card: #171d19;
    --card-2: #1d2520;
    --line: #2b352e;
    --text: #e9efe9;
    --muted: #93a096;
    --green: #4be37a;
    --green-dark: #1f7a3d;
    --warn: #e8b84a;
    --radius: 12px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background:
        radial-gradient(900px 400px at 85% -10%, rgba(75, 227, 122, 0.08), transparent 70%),
        var(--bg);
    color: var(--text);
    font-family: -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.6;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 28px 22px 70px; }


header { display: flex; align-items: center; flex-wrap: wrap; gap: 14px 24px; }
header img { width: 48px; height: 48px; }

h1 {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 40px;
    font-weight: normal;
    letter-spacing: 0.5px;
    margin: 0;
}
h2 {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 30px;
    font-weight: normal;
    margin: 4px 0 12px;
}

nav { margin-left: auto; }
.nav-btn {
    background: var(--green);
    color: #0b1a10;
    border-color: var(--green);
    font-weight: 600;
}
.nav-btn:hover { background: #6af095; border-color: #6af095; }

hr { border: 0; border-top: 1px solid var(--line); margin: 30px 0; }

.small {
    color: var(--muted);
    font-size: 14px;
    margin: 6px 0;
}
section > .small:first-child {
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--green);
    font-size: 13px;
}


button, select, input[type="text"], input[type="search"] {
    background: var(--card);
    color: var(--text);
    border: 1px solid var(--line);
    padding: 9px 16px;
    font-family: inherit;
    font-size: 15px;
    border-radius: 8px;
    transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
button { cursor: pointer; }
button:hover { border-color: var(--green); }
button:disabled { opacity: 0.35; cursor: not-allowed; border-color: var(--line); }
button.active {
    background: rgba(75, 227, 122, 0.12);
    border-color: var(--green);
    color: var(--green);
    box-shadow: 0 0 14px rgba(75, 227, 122, 0.25);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(75, 227, 122, 0.15);
}
input[type="text"], input[type="search"] { width: 100%; }
select { margin: 10px 0; }
input[type="checkbox"], input[type="radio"] { accent-color: var(--green); }

#analyseBtn {
    background: var(--green);
    color: #0e2616;
    border-color: var(--green);
    font-weight: 600;
    padding: 11px 28px;
    margin-top: 4px;
}
#analyseBtn:hover:not(:disabled) { background: #6af095; box-shadow: 0 0 18px rgba(75, 227, 122, 0.35); }
#analyseBtn:disabled { background: var(--card); color: var(--muted); }


.layout { display: grid; grid-template-columns: 1fr 350px; gap: 44px; }

.row { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.row input { flex: 1; width: auto; }


.drop {
    border: 2px dashed var(--line);
    background: var(--card);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    margin: 16px 0 20px;
    max-width: 500px;
    transition: border-color 0.2s, background 0.2s;
}
.drop:hover { border-color: #3f5046; }
.drop.over { border-color: var(--green); background: rgba(75, 227, 122, 0.07); }
.drop-title { font-family: Georgia, serif; font-size: 22px; margin: 0 0 6px; }
.drop p { color: var(--muted); margin: 0 0 14px; }
.drop .drop-title { color: var(--text); }

#preview {
    display: block;
    margin: 20px auto 0;
    max-width: 100%;
    border-radius: 10px;
    border: 1px solid var(--line);
}

.box {
    background: var(--card);
    border: 1px solid var(--line);
    border-left: 3px solid var(--green);
    border-radius: var(--radius);
    padding: 20px 22px;
    margin-top: 18px;
    max-width: 500px;
}
.box p { margin: 6px 0; }

.bar { background: var(--card-2); height: 8px; border-radius: 99px; margin: 3px 0 12px; overflow: hidden; }
.bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--green-dark), var(--green)); border-radius: 99px; }

.warn { color: var(--warn); }


aside h2 { margin-bottom: 16px; }

details {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    margin-bottom: 14px;
    overflow: hidden;
}
details[open] { border-color: #3a4a3f; }
summary {
    padding: 15px 18px;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--green); font-size: 22px; line-height: 1; }
details[open] summary::after { content: "–"; }
summary:hover { background: var(--card-2); }
.inner { padding: 6px 18px 18px; }


#libList { max-height: 430px; overflow-y: auto; padding-right: 6px; }
#libList::-webkit-scrollbar { width: 6px; }
#libList::-webkit-scrollbar-thumb { background: var(--line); border-radius: 99px; }
.disease { border-top: 1px solid var(--line); padding: 12px 0; font-size: 15px; }
.disease b { color: var(--text); }
.disease p { margin: 3px 0; color: var(--muted); }
mark { background: var(--green); color: #0b1a10; border-radius: 3px; padding: 0 2px; }


ul { padding-left: 0; list-style: none; margin: 8px 0; }
li.task { display: flex; gap: 10px; align-items: center; padding: 8px 0; border-top: 1px solid var(--line); }
li.task span { flex: 1; }
li.task button { padding: 4px 10px; font-size: 13px; }
li.task.done span { text-decoration: line-through; color: var(--muted); }


.q { margin-bottom: 16px; font-size: 15px; }
.q label { display: block; margin: 5px 0; color: var(--muted); cursor: pointer; }
.q label:hover { color: var(--text); }
#quizResult { margin-top: 12px; color: var(--green); }


ol { padding-left: 22px; }
ol li { margin: 6px 0; color: var(--text); }
ol li::marker { color: var(--green); font-weight: 600; }

@media (max-width: 800px) {
    .layout { grid-template-columns: 1fr; }
    h1 { font-size: 32px; }
    nav { margin-left: 0; }
}