:root { --navy: #0b2545; --navy-light: #23466f; --text: #17253a; --muted: #5f6f82; --line: #d9e1ea; --white: #ffffff; }
* { box-sizing: border-box; }
body { margin: 0; background: #f6f8fb; color: var(--text); font: 17px/1.7 Arial, Helvetica, sans-serif; }
.container { width: min(760px, calc(100% - 32px)); margin: 50px auto 80px; }
.archive-page { width: min(980px, calc(100% - 32px)); }
h1, h2 { color: var(--navy); }
h1 { font: normal clamp(30px, 5vw, 42px)/1.2 Georgia, 'Times New Roman', serif; margin: 22px 0 8px; }
h2 { font-size: 21px; line-height: 1.4; }
a { color: var(--navy-light); }
.back { font-weight: bold; }
.date { color: var(--muted); }
.note { padding: 12px 16px; background: #e8eef5; }
.question { border-top: 1px solid var(--line); padding: 17px 0; }
.question p { margin-bottom: 0; }
.references { border-top: 2px solid var(--navy); margin-top: 35px; padding-top: 15px; }
.references li { margin: 10px 0; overflow-wrap: anywhere; }

.research-search {
    margin: 32px 0 38px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--white);
}

.research-search label {
    display: block;
    margin-bottom: 8px;
    color: var(--navy);
    font-weight: bold;
}

.research-search input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #aebaca;
    border-radius: 6px;
    color: var(--text);
    background: var(--white);
    font: inherit;
}

.research-search input:focus {
    outline: 3px solid rgba(35, 70, 111, 0.2);
    border-color: var(--navy-light);
}

.result-count {
    min-height: 1.7em;
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.research-card {
    position: relative;
    min-height: 190px;
    padding: 24px;
    border: 1px solid var(--line);
    border-top: 4px solid var(--navy);
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 4px 16px rgba(11, 37, 69, 0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.research-card:hover,
.research-card:focus-within {
    transform: translateY(-3px);
    box-shadow: 0 9px 24px rgba(11, 37, 69, 0.12);
}

.research-card[hidden] {
    display: none;
}

.research-card .week-label {
    margin: 0 0 8px;
    color: var(--muted);
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.research-card h3 {
    margin: 0 0 34px;
    color: var(--navy);
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 22px;
    line-height: 1.35;
}

.research-card h3 a {
    color: inherit;
    text-decoration: none;
}

.research-card h3 a::after {
    position: absolute;
    inset: 0;
    content: '';
}

.read-link {
    position: absolute;
    right: 24px;
    bottom: 20px;
    color: var(--navy-light);
    font-weight: bold;
}

.empty-state {
    padding: 28px;
    border: 1px dashed var(--line);
    border-radius: 8px;
    color: var(--muted);
    background: var(--white);
    text-align: center;
}

@media (max-width: 700px) {
    .research-grid {
        grid-template-columns: 1fr;
    }

    .research-card {
        min-height: 165px;
    }
}