:root {
    --background: #f3f5f7;
    --surface: #ffffff;
    --text: #17202a;
    --muted: #667085;
    --border: #d5dae1;
    --primary: #294c67;
    --primary-hover: #1f3b50;
    --soft-primary: #eef4f8;
    --error: #a52828;
    --success: #27633d;
    --radius: 14px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;

    background-color: #ffffff;
    background-image: url("./media/img/prague_background.png");
    background-repeat: no-repeat;
    background-position: center top;
    background-size: 100% auto;
    background-attachment: fixed;

    color: var(--text);
    font-family:
        Inter,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
}

button,
input {
    font: inherit;
}

.page {
    min-height: 100vh;
    padding: 56px 20px;
}

/* =========================================================
   MAIN NAVIGATION
   ========================================================= */
.main-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;

    width: min(760px, 100%);
    margin: 0 auto 18px;
    padding: 0 4px;
}

.main-menu-link {
    color: var(--muted);
    font-size: 1.1rem;
    font-weight: 500;
    text-decoration: none;

    transition:
        color 150ms ease,
        font-weight 150ms ease;
}

.main-menu-link:hover {
    color: var(--primary);
}

.main-menu-link.is-active {
    color: var(--primary);
    font-weight: 700;
}


.engine-panel {
    width: min(760px, 100%);
    margin: 0 auto;
    padding: 44px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.hero {
    margin-bottom: 38px;
    text-align: center;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: clamp(2rem, 6vw, 3.2rem);
    line-height: 1.08;
}

.subtitle {
    margin: 18px 0 0;
    color: var(--primary);
    font-size: 1.15rem;
    font-weight: 600;
}

.introduction {
    max-width: 620px;
    margin: 18px auto 0;
    color: var(--muted);
    line-height: 1.65;
    text-align: justify;
}

.input-section h2,
.mock-files h2,
.results h2 {
    margin: 0 0 20px;
    font-size: 1.15rem;
}

.field + .field {
    margin-top: 18px;
}

.field label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.field input {
    width: 100%;
    padding: 14px 15px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
}

.field input:focus {
    border-color: var(--primary);
    outline: 3px solid var(--soft-primary);
}

.divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 34px 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.divider::before,
.divider::after {
    height: 1px;
    flex: 1;
    background: var(--border);
    content: "";
}

.upload-box {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px;
    border: 1px dashed var(--border);
    border-radius: 10px;
    background: #fafbfc;
}

#listing-file {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

.file-button,
.secondary-button {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    padding: 10px 16px;
    border: 1px solid var(--primary);
    border-radius: 9px;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.file-button:hover,
.secondary-button:hover {
    background: var(--soft-primary);
}

.helper-text,
.mock-files p {
    color: var(--muted);
    font-size: 0.9rem;
}

.mock-files {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 32px;
    padding: 22px;
    border-radius: 10px;
    background: var(--soft-primary);
}

.mock-files h2,
.mock-files p {
    margin-top: 0;
    margin-bottom: 5px;
}

.secondary-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.launch-button {
    width: 100%;
    margin-top: 10px;
    padding: 15px 20px;
    border: 0;
    border-radius: 10px;
    background: var(--primary);
    color: white;
    font-weight: 700;
    cursor: pointer;
}

.launch-button:hover {
    background: var(--primary-hover);
}

.launch-button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.form-message {
    min-height: 24px;
    margin: 22px 0 0;
    color: var(--error);
}

.results {
    margin-top: 34px;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 10px;
}

@media (max-width: 650px) {
    .page {
        padding: 20px 12px;
    }

    .engine-panel {
        padding: 28px 20px;
    }

    .mock-files,
    .upload-box {
        align-items: stretch;
        flex-direction: column;
    }

    .file-button,
    .secondary-button {
        width: 100%;
    }
}

/* =========================================================
   ENGINE LOADING STATE
   ========================================================= */

.results.is-loading {
    display: block;
}

.loading-card {
    padding: 1.5rem;
    border: 1px solid rgba(20, 32, 45, 0.14);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.92);
}

.loading-header {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    margin-bottom: 1.25rem;
}

.loading-header h3 {
    margin: 0 0 0.2rem;
    font-size: 1.1rem;
}

.loading-header p {
    margin: 0;
    color: #5f6873;
}

.loading-spinner {
    width: 26px;
    height: 26px;
    flex: 0 0 26px;
    border: 3px solid rgba(20, 32, 45, 0.16);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: engine-spin 0.8s linear infinite;
}

.progress-list {
    display: grid;
    gap: 0.8rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.progress-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #7a828c;
    transition:
        color 180ms ease,
        opacity 180ms ease;
}

.progress-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.35rem;
    height: 1.35rem;
    flex: 0 0 1.35rem;
    border: 1px solid currentColor;
    border-radius: 50%;
    font-size: 0.75rem;
    line-height: 1;
}

.progress-item.is-active {
    color: inherit;
    font-weight: 600;
}

.progress-item.is-active .progress-icon {
    animation: engine-pulse 1.1s ease-in-out infinite;
}

.progress-item.is-complete {
    color: #2f6f4e;
}

.progress-item.is-pending {
    opacity: 0.55;
}

.launch-button:disabled {
    cursor: wait;
    opacity: 0.72;
}

@keyframes engine-spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes engine-pulse {
    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.12);
    }
}

@media (prefers-reduced-motion: reduce) {
    .loading-spinner,
    .progress-item.is-active .progress-icon {
        animation: none;
    }
}

/* =========================================================
   ENGINE RESULT PRESENTATION
   ========================================================= */

.results {
    margin-top: 34px;
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.96);
}

.results-title {
    margin: 0 0 28px;
    color: var(--primary);
    font-size: 1.55rem;
    line-height: 1.2;
    text-align: center;
}

.result-header {
    margin-bottom: 22px;
}

.result-status-line {
    margin: 0 0 12px;
    color: var(--text);
    font-size: 0.98rem;
}

.result-status-line strong {
    color: var(--primary);
}

.result-summary {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.45;
}

/* Summary statistics */

.result-statistics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 24px;

    margin: 0 0 32px 28px;
    padding: 18px 22px;

    border-left: 4px solid var(--primary);
    border-radius: 0 12px 12px 0;
    background: var(--soft-primary);
}

.result-stat {
    display: flex;
    align-items: baseline;
    gap: 8px;
    min-width: 0;
}

.result-stat strong {
    min-width: 1.5rem;
    color: var(--primary);
    font-size: 1.18rem;
    line-height: 1;
}

.result-stat span {
    color: var(--text);
    font-size: 0.92rem;
}

/* Entity cards */

.entity-grid {
    display: grid;
    gap: 20px;
}

.entity-card {
    padding: 22px;

    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);

    box-shadow:
        0 4px 14px rgba(23, 32, 42, 0.06);
}

.entity-card-header {
    margin-bottom: 16px;
}

.entity-title {
    margin: 0 0 12px;
    color: var(--primary);
    font-size: 1.28rem;
    line-height: 1.2;
}

.entity-interpretation {
    margin: 0 0 12px;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.45;
}

.entity-listing-count {
    margin: 0;
}

.entity-listings {
    display: grid;
    gap: 8px;

    margin: 0;
    padding: 0 0 0 21px;
}

.entity-listings li {
    padding-left: 3px;
    line-height: 1.5;
}

.entity-listings li strong {
    margin-right: 5px;
}

.entity-component {
    margin: 18px 0 0;
    padding-top: 15px;

    border-top: 1px solid var(--border);

    color: var(--muted);
    font-size: 0.91rem;
}

.entity-component-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 18px;
}

.entity-component p {
    margin: 0;
}

.entity-component strong {
    color: var(--text);
}

.entity-probability {
    color: var(--primary);
    font-weight: 700;
}

.entity-cutoff-distance {
    margin-top: 9px !important;
}

.entity-cutoff-distance span {
    color: var(--primary);
    font-weight: 700;
}

.entity-component strong {
    color: var(--text);
}

/* Expandable evidence and technical output */

.result-disclosures {
    display: grid;
    gap: 17px;

    margin-top: 32px;
    padding-top: 22px;

    border-top: 1px solid var(--border);
}

.result-details {
    margin: 0;
}

.result-details summary {
    width: fit-content;

    color: var(--primary);
    font-weight: 700;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;

    cursor: pointer;
}

.result-details summary:hover {
    color: var(--primary-hover);
}

.result-details[open] summary {
    margin-bottom: 16px;
}

.result-details pre {
    max-height: 420px;
    margin: 0;
    padding: 16px;
    overflow: auto;

    border: 1px solid var(--border);
    border-radius: 10px;
    background: #f7f9fb;

    font-size: 0.8rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
}

/* Pairwise comparison table */

.table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.comparison-table th,
.comparison-table td {
    padding: 11px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.comparison-table th {
    color: var(--primary);
    background: var(--soft-primary);
}

/* Responsive result layout */

@media (max-width: 650px) {
    .results {
        padding: 22px 18px;
    }

    .result-statistics {
        grid-template-columns: 1fr;
        margin-left: 12px;
    }

    .entity-card {
        padding: 18px;
    }
}

/* =========================================================
   METHODOLOGY PAGE
   ========================================================= */

.methodology-content {
    display: grid;
    gap: 0;
}

.methodology-section {
    padding: 30px 0;
    border-top: 1px solid var(--border);
}

.methodology-section:first-child {
    border-top: 0;
    padding-top: 0;
}

.methodology-section:last-child {
    padding-bottom: 0;
}

.methodology-heading {
    display: flex;
    align-items: center;
    gap: 16px;

    margin-bottom: 14px;
}

.methodology-step {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 44px;
    height: 44px;
    flex: 0 0 44px;

    margin: 0;

    border-radius: 50%;
    background: var(--primary);
    color: white;

    font-size: 1rem;
    font-weight: 800;
    line-height: 1;

    box-shadow: 0 4px 12px rgba(41, 76, 103, 0.18);
}

.methodology-section h2 {
    margin: 0;

    color: var(--primary);

    font-size: 1.3rem;
    line-height: 1.3;
}

.methodology-section > p {
    margin: 0;
    color: var(--text);
    line-height: 1.7;
}

.methodology-section > p + p {
    margin-top: 16px;
}

/* =========================================================
   PAGE / PANEL TRANSITIONS
   ========================================================= */

.engine-panel {
    opacity: 1;
    transform: translateY(0);

    transition:
        opacity 220ms ease,
        transform 220ms ease;
}


/* Incoming page */

.engine-panel.panel-enter {
    animation: panel-fade-in 320ms ease both;
}


/* Current page before navigation */

.engine-panel.panel-leaving {
    opacity: 0;
    transform: translateY(8px);
}


@keyframes panel-fade-in {

    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }

}


/* Accessibility */

@media (prefers-reduced-motion: reduce) {

    .engine-panel {
        transition: none;
    }

    .engine-panel.panel-enter {
        animation: none;
    }

}