body {
    margin: 0;
    color: #EAF2FF;
    font-family: "Segoe UI", sans-serif;

    background:
        linear-gradient(
            rgba(2, 8, 24, 0.52),
            rgba(2, 8, 24, 0.62)
        ),
        url("../images/future-bg.png");

    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.site-header {
    padding: 20px 30px;
    border-bottom: 1px solid #1F6F8B;

    background: rgba(5, 12, 28, 0.72);
    backdrop-filter: blur(2px);
}

.logo-area h1 {
    margin: 0;
    color: #63E6FF;
}

.logo-area p {
    margin: 6px 0 18px;
    color: #9FB0C8;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 36px;
}

.main-nav a {
    color: #EAF2FF;
    text-decoration: none;

    padding: 6px 0;

    font-size: 16px;
    line-height: 1;
    white-space: nowrap;
}

.main-nav a:hover {
    color: #63E6FF;
}

main {
    padding: 30px 40px;
}

.featured-card,
.small-topic-card {
    background:
        linear-gradient(
            rgba(255,255,255,0.02) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            rgba(255,255,255,0.02) 1px,
            transparent 1px
        ),
        linear-gradient(
            135deg,
            rgba(24, 52, 78, 0.92),
            rgba(8, 18, 34, 0.95)
        );

    background-size:
        24px 24px,
        24px 24px,
        auto;
}

.pick-label {
    color: #63E6FF;
    font-size: 14px;
    font-weight: bold;
}

.featured-card h2 {
    font-size: 32px;
    margin: 10px 0;
}

.featured-card h2 a {
    color: #EAF2FF;
    text-decoration: none;
}

.featured-card h2 a:visited {
    color: #EAF2FF;
}

.featured-card h2 a:hover {
    color: #63E6FF;
}

.featured-card h2 a:active {
    color: #63E6FF;
}

.article-summary {
    color: #B7C7DC;
    line-height: 1.8;
}

.read-button {
    display: inline-block;

    margin-top: 15px;
    padding: 10px 20px;

    border: 1px solid #63E6FF;
    border-radius: 6px;

    color: #63E6FF;
    text-decoration: none;
}

.read-button:hover {
    background-color: #63E6FF;
    color: #08111F;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
    width: 100%;
}

.logo-area {
    flex: 1;
    min-width: 0;
}

.lab-logo {
    display: block;
    width: 600px;
    max-width: 100%;
    height: auto;
}

.clock-panel {
    width: 320px;
    flex-shrink: 0;
}

#current-time {
    font-size: 64px;
    font-weight: bold;
    letter-spacing: 6px;
    line-height: 1;

    color: #63E6FF;

    font-family: Consolas, "Courier New", monospace;
    font-variant-numeric: tabular-nums;

    text-shadow:
        0 0 6px rgba(99, 230, 255, 0.9),
        0 0 18px rgba(99, 230, 255, 0.45);
}

#current-date {
    margin-top: 8px;
    font-size: 18px;
    letter-spacing: 2px;
    color: #9FB0C8;
}

.observation-status {
    margin-top: 14px;
}

.observation-status span {
    display: block;
    font-size: 12px;
    letter-spacing: 2px;
    color: #7089A5;
}

.observation-status strong {
    display: block;
    margin-top: 5px;
    font-size: 16px;
    letter-spacing: 2px;
    color: #63E6FF;
}

.topics-layout {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 20px;

    max-width: 1200px;
    margin: 40px;
    align-items: stretch;
}

.topics-layout .featured-card {
    margin: 0;
}

.side-topics {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.small-topic-card {
    padding: 18px 20px;

    background: rgba(16, 26, 46, 0.92);

    border: 1px solid rgba(46, 223, 255, 0.55);
    border-radius: 8px;
}

.topic-date {
    margin: 0 0 8px;
    font-size: 13px;
    color: #9FB0C8;
    font-family: Consolas, "Courier New", monospace;
}

.small-topic-card h3 {
    margin: 0;
    font-size: 18px;
    line-height: 1.5;
}

.small-topic-card h3 a {
    color: #EAF2FF;
    text-decoration: none;
}

.small-topic-card h3 a:hover {
    color: #63E6FF;
}

@media (max-width: 850px) {
    .topics-layout {
        grid-template-columns: 1fr;
        margin: 20px;
    }
}

/* =============================
   Article page
============================= */

.article-page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 30px 100px;
}

.article-panel {
    padding: 45px 55px;

    background:
        linear-gradient(
            rgba(255,255,255,0.018) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            rgba(255,255,255,0.018) 1px,
            transparent 1px
        ),
        linear-gradient(
            145deg,
            rgba(13, 29, 50, 0.96),
            rgba(5, 14, 29, 0.96)
        );

    background-size:
        28px 28px,
        28px 28px,
        auto;

    border: 1px solid rgba(99, 230, 255, 0.5);
    border-radius: 10px;

    box-shadow:
        0 0 25px rgba(46, 223, 255, 0.10);
}

.article-label {
    margin: 0 0 8px;

    color: #63E6FF;

    font-size: 13px;
    letter-spacing: 3px;
    font-family: Consolas, "Courier New", monospace;
}

.article-date {
    margin: 0 0 18px;

    color: #8297B3;

    font-size: 14px;
    font-family: Consolas, "Courier New", monospace;
}

.article-header h1 {
    margin: 0 0 35px;

    font-size: 38px;
    line-height: 1.4;

    color: #EAF2FF;
}

.article-content {
    max-width: 760px;

    color: #C7D4E5;

    font-size: 17px;
    line-height: 2;
}

.article-content p {
    margin: 0 0 24px;
}


/* =============================
   Future observation
============================= */

.future-panel {
    margin-top: 50px;
    padding: 30px;

    background: rgba(4, 18, 33, 0.72);

    border-top: 1px solid #2EDFFF;
    border-bottom: 1px solid rgba(46, 223, 255, 0.35);
}

.future-label {
    margin: 0;

    color: #63E6FF;

    font-size: 12px;
    letter-spacing: 3px;
    font-family: Consolas, "Courier New", monospace;
}

.future-panel h2 {
    margin: 8px 0 12px;

    color: #EAF2FF;
}

.future-notice {
    color: #93A7BF;

    font-size: 13px;
    line-height: 1.7;
}

.future-metrics {
    display: flex;
    gap: 50px;

    margin: 30px 0;
}

.future-metric {
    display: flex;
    flex-direction: column;
}

.metric-name {
    color: #EAF2FF;

    font-size: 15px;
}

.metric-en {
    margin-top: 3px;

    color: #7089A5;

    font-size: 10px;
    letter-spacing: 2px;

    font-family: Consolas, "Courier New", monospace;
}

.metric-value {
    margin-top: 7px;

    color: #63E6FF;

    font-size: 42px;
    line-height: 1;

    font-family: Consolas, "Courier New", monospace;

    text-shadow:
        0 0 10px rgba(99, 230, 255, 0.45);
}

.future-text {
    color: #B7C7DC;

    line-height: 1.9;
}


/* =============================
   Article sources
============================= */

.article-sources {
    margin-top: 30px;
}

.article-sources a,
.article-sources a:visited {
    color: #A5DDF2;
    text-decoration: underline;
    text-underline-offset: 3px;
}


/* =============================
   Back button
============================= */

.back-button {
    display: inline-block;

    margin-top: 35px;
    padding: 10px 18px;

    color: #63E6FF;
    text-decoration: none;

    border: 1px solid rgba(99, 230, 255, 0.55);
    border-radius: 6px;
}

.back-button:hover {
    background: #63E6FF;
    color: #08111F;
}


/* =============================
   Mobile
============================= */

@media (max-width: 700px) {

    .article-page {
        padding: 30px 15px 70px;
    }

    .article-panel {
        padding: 28px 22px;
    }

    .article-header h1 {
        font-size: 28px;
    }

    .future-metrics {
        flex-direction: column;
        gap: 24px;
    }

    .metric-value {
        font-size: 36px;
    }
}


/* Article navigation */

.article-navigation {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 30px;
}

.article-navigation .back-button {
    margin-top: 0;
}

@media (max-width: 600px) {
    .article-navigation {
        flex-direction: column;
        align-items: flex-start;
    }
}