:root {
    --bg-deep: #0b1426;
    --bg-card: #0f1d32;
    --bg-hover: #152238;
    --border: #1e3a5f;
    --border-light: #2a4a6a;
    --text-primary: #e8ecf2;
    --text-secondary: #8a9ab5;
    --text-muted: #4a6a8a;
    --accent: #2e75b6;
    --green: #27ae60;
    --orange: #e87722;
    --red: #c0392b;
    --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", Consolas, monospace;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: radial-gradient(circle at top, rgba(46, 117, 182, 0.15), transparent 32%), var(--bg-deep);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
}

button,
input {
    font: inherit;
}

.page {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 20px 40px;
}

.site-header {
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-text {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2.5px;
    color: var(--text);
    font-family: var(--font-mono);
}

.logo-highlight {
    color: #22d3ee;
}

.logo-sep {
    font-size: 11px;
    color: var(--text-muted);
    margin-left: 4px;
}

.header-nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.header-nav a {
    font-size: 11px;
    color: var(--text-muted);
    text-decoration: none;
    letter-spacing: 1px;
    transition: color 0.2s ease;
}

.header-nav a:hover,
.header-nav a:focus-visible {
    color: var(--text-primary);
}

.hero {
    padding: 48px 0 32px;
    border-bottom: 1px solid var(--border);
}

.hero-label,
.section-label {
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.hero-label {
    margin-bottom: 8px;
}

.hero h1 {
    font-family: var(--font-sans);
    font-size: 28px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 10px;
}

.hero-sub {
    font-size: 13px;
    color: var(--text-secondary);
    max-width: 680px;
    line-height: 1.75;
}

.hero-source {
    margin-top: 14px;
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.hero-source span {
    color: var(--green);
}

.section-label {
    margin-bottom: 10px;
    margin-top: 32px;
}

.vessel-types {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.vessel-btn {
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
}

.vessel-btn:hover,
.vessel-btn:focus-visible {
    border-color: var(--border-light);
    color: var(--text-secondary);
}

.vessel-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(46, 117, 182, 0.08);
    font-weight: 600;
}

.vessel-btn .count {
    opacity: 0.55;
    margin-left: 4px;
}

.imo-lookup {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    align-items: center;
    flex-wrap: wrap;
}

.imo-lookup input,
.capture-form input {
    padding: 10px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.imo-lookup input {
    width: 220px;
}

.imo-lookup input:focus,
.capture-form input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(46, 117, 182, 0.12);
}

.imo-lookup input::placeholder,
.capture-form input::placeholder {
    color: var(--text-muted);
}

.imo-lookup button,
.share-btn,
.capture-form button {
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.imo-lookup button {
    padding: 10px 16px;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    letter-spacing: 0.5px;
}

.imo-lookup button:hover,
.imo-lookup button:focus-visible {
    background: rgba(46, 117, 182, 0.1);
}

.imo-status {
    font-size: 11px;
    color: var(--text-muted);
}

.imo-status.found {
    color: var(--green);
}

.imo-status.not-found {
    color: var(--red);
}

.imo-helper {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: -6px;
    margin-bottom: 12px;
}

.trust-line {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 10px;
    letter-spacing: 0.02em;
}

.sliders {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 28px;
}

.slider-card,
.result-card,
.capture-section,
.source-note,
.fleet-impact {
    background: var(--bg-card);
    border-radius: 6px;
}

.slider-card {
    border: 1px solid var(--border);
    padding: 16px;
}

.slider-label,
.result-label,
.fi-label,
.sn-label {
    font-size: 9px;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.slider-value {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
}

.slider-value .unit {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 4px;
}

.slider-input {
    width: 100%;
    margin-top: 8px;
    accent-color: var(--accent);
    cursor: pointer;
}

.slider-range {
    display: flex;
    justify-content: space-between;
    font-size: 9px;
    color: var(--text-muted);
    margin-top: 4px;
}

.results {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.result-card {
    padding: 18px;
    border-top: 3px solid var(--border);
}

.result-card.fuel {
    border-top-color: var(--orange);
}

.result-card.co2 {
    border-top-color: var(--red);
}

.result-card.ets {
    border-top-color: var(--accent);
}

.result-card.total {
    border-top-color: var(--green);
}

.result-value {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.fuel-color {
    color: var(--orange);
}

.co2-color {
    color: var(--red);
}

.ets-color {
    color: var(--accent);
}

.total-color {
    color: var(--green);
}

.result-sub,
.fi-sub,
.capture-section p,
.source-note p,
.capture-feedback {
    font-size: 11px;
    color: var(--text-muted);
}

.fleet-impact {
    border: 1px solid rgba(192, 57, 43, 0.25);
    padding: 18px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
}

.fleet-impact-right {
    text-align: right;
}

.fi-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--red);
}

.fi-note {
    font-size: 10px;
    color: var(--text-muted);
}

.share-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    align-items: center;
}

.share-btn {
    padding: 8px 16px;
    letter-spacing: 0.5px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
}

.share-btn:hover,
.share-btn:focus-visible {
    border-color: var(--border-light);
    color: var(--text-primary);
}



.copied-toast {
    font-size: 11px;
    color: var(--green);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.copied-toast.show {
    opacity: 1;
}

.capture-section {
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    padding: 24px;
    margin-bottom: 32px;
}

.capture-section h2 {
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

.capture-section p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.capture-form {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.capture-form input {
    flex: 1 1 220px;
    min-width: 0;
}

.capture-form button {
    padding: 10px 20px;
    background: var(--accent);
    border: none;
    color: #fff;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.capture-form button:hover,
.capture-form button:focus-visible {
    background: #256a9e;
}

.capture-feedback {
    margin-top: 10px;
    min-height: 16px;
}

.capture-feedback.error {
    color: var(--red);
}

.capture-feedback.success {
    color: var(--green);
}

.capture-success {
    display: none;
    font-size: 12px;
    color: var(--green);
    margin-top: 10px;
}

.source-note {
    background: rgba(39, 174, 96, 0.06);
    border: 1px solid rgba(39, 174, 96, 0.2);
    padding: 16px;
    margin-bottom: 32px;
}

.sn-label {
    color: var(--green);
    font-weight: 700;
    margin-bottom: 4px;
}

.source-note p {
    line-height: 1.7;
}

.source-note .hl {
    color: var(--green);
}

.site-footer {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    text-align: center;
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 20px;
}

.site-footer a {
    color: var(--text-muted);
    text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
    color: var(--text-secondary);
}

.footer-sep {
    margin: 0 6px;
}

@media (max-width: 900px) {
    .results {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .page {
        padding: 0 15px 32px;
    }

    .site-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-nav {
        width: 100%;
        justify-content: flex-start;
    }

    .logo-sep {
        display: none;
    }

    .hero h1 {
        font-size: 22px;
    }

    .sliders,
    .results {
        grid-template-columns: 1fr;
    }

    .fleet-impact {
        flex-direction: column;
        text-align: center;
    }

    .fleet-impact-right {
        text-align: center;
    }

    .capture-form {
        flex-direction: column;
    }

    .capture-form button,
    .imo-lookup button,
    .imo-lookup input {
        width: 100%;
    }
}