/* FUSION-ML — Swiss Minimalist Design System */

/* -------------------------------------------------------- */
/* Reset & Variables                                         */
/* -------------------------------------------------------- */

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

:root {
    --bg: #ffffff;
    --fg: #000000;
    --border: #000000;
    --muted: #666666;
    --surface: #f5f5f5;
    --font: "Inter", "Helvetica Neue", system-ui, sans-serif;
    --mono: "JetBrains Mono", "SF Mono", "Consolas", monospace;
    --max-w: 1200px;
    --gap: 2rem;
}

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font);
    color: var(--fg);
    background: var(--bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* -------------------------------------------------------- */
/* Typography                                                */
/* -------------------------------------------------------- */

h1 {
    font-size: 1.6rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-bottom: 2px solid var(--fg);
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
}

h2 {
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--fg);
}

p {
    margin-bottom: 0.75rem;
}

a {
    color: var(--fg);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
}

a:hover {
    background: var(--fg);
    color: var(--bg);
}

code {
    font-family: var(--mono);
    font-size: 0.9em;
    background: var(--surface);
    padding: 0.15em 0.4em;
}

.mono {
    font-family: var(--mono);
    font-size: 0.85rem;
}

.muted {
    color: var(--muted);
    font-size: 0.9rem;
}

/* -------------------------------------------------------- */
/* Navigation                                                */
/* -------------------------------------------------------- */

.nav {
    border-bottom: 2px solid var(--fg);
    padding: 0.75rem 0;
}

.nav-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--gap);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    border-bottom: none;
}

.nav-logo:hover {
    background: none;
    color: var(--fg);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-bottom: none;
    padding: 0.2rem 0;
}

.nav-link:hover {
    border-bottom: 1px solid var(--fg);
    background: none;
    color: var(--fg);
}

/* -------------------------------------------------------- */
/* Layout                                                    */
/* -------------------------------------------------------- */

.main {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: var(--gap);
    flex: 1;
    width: 100%;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}

@media (max-width: 768px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* -------------------------------------------------------- */
/* Cards & Panels                                            */
/* -------------------------------------------------------- */

.card {
    border: 1px solid var(--fg);
    padding: 1.5rem;
    display: block;
    transition: background 0.15s;
}

.card:hover {
    background: var(--fg);
    color: var(--bg);
}

.card h2 {
    margin-top: 0;
    border-bottom: none;
}

.card:hover h2 {
    color: var(--bg);
}

.card p {
    margin-bottom: 0;
    font-size: 0.9rem;
}

.panel {
    border: 1px solid var(--fg);
    padding: 1.5rem;
}

/* -------------------------------------------------------- */
/* Forms                                                     */
/* -------------------------------------------------------- */

.field {
    margin-bottom: 1rem;
}

.field label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.3rem;
    color: var(--muted);
}

.field-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.field-row .field {
    flex: 1;
    margin-bottom: 0;
}

input[type="text"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--fg);
    background: var(--bg);
    font-family: var(--font);
    font-size: 0.9rem;
    color: var(--fg);
    outline: none;
}

input:focus, textarea:focus, select:focus {
    box-shadow: 0 0 0 1px var(--fg);
}

textarea {
    resize: vertical;
}

.code-area {
    font-family: var(--mono);
    font-size: 0.8rem;
    line-height: 1.5;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23000'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
    padding-right: 2rem;
}

input[type="checkbox"] {
    margin-right: 0.5rem;
    accent-color: var(--fg);
}

/* -------------------------------------------------------- */
/* Buttons                                                   */
/* -------------------------------------------------------- */

.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    background: var(--fg);
    color: var(--bg);
    border: 1px solid var(--fg);
    font-family: var(--font);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.btn:hover {
    background: var(--bg);
    color: var(--fg);
}

.btn:disabled {
    background: var(--muted);
    border-color: var(--muted);
    color: var(--bg);
    cursor: not-allowed;
}

.btn-small {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--bg);
    color: var(--fg);
    border: 1px solid var(--fg);
    font-family: var(--font);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
}

.btn-small:hover {
    background: var(--fg);
    color: var(--bg);
}

.btn-remove {
    border: none;
    color: var(--muted);
    font-size: 0.9rem;
}

.btn-remove:hover {
    color: var(--fg);
    background: none;
}

.btn-group {
    display: flex;
    gap: 0.75rem;
    margin: 1rem 0;
}

/* -------------------------------------------------------- */
/* Tables                                                    */
/* -------------------------------------------------------- */

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.table th {
    text-align: left;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    border-bottom: 1px solid var(--fg);
    padding: 0.4rem 0.5rem;
}

.table td {
    padding: 0.3rem 0.5rem;
    border-bottom: 1px solid var(--surface);
}

.table input {
    border: none;
    border-bottom: 1px solid var(--surface);
    padding: 0.2rem 0;
    font-size: 0.85rem;
}

.table input:focus {
    border-bottom-color: var(--fg);
    box-shadow: none;
}

/* -------------------------------------------------------- */
/* Result Boxes                                              */
/* -------------------------------------------------------- */

.result-box {
    margin-top: 1rem;
    padding: 1rem;
    border: 1px solid var(--fg);
    font-size: 0.9rem;
}

.result-box.pass {
    border-style: solid;
}

.result-box.fail {
    border-style: dashed;
}

.result-box .result-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    margin-bottom: 0.3rem;
}

.result-box .result-value {
    font-family: var(--mono);
    font-size: 1rem;
}

.latex-box {
    padding: 1rem;
    background: var(--surface);
    min-height: 2.5rem;
    display: flex;
    align-items: center;
    font-size: 1.2rem;
}

/* -------------------------------------------------------- */
/* ScoreCard                                                 */
/* -------------------------------------------------------- */

.scorecard {
    min-height: 200px;
}

.scorecard-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--fg);
}

.scorecard-header .verdict {
    font-size: 1.2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.layer-group {
    margin-bottom: 1.25rem;
}

.layer-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--muted);
    margin-bottom: 0.5rem;
    cursor: pointer;
}

.layer-title:hover {
    color: var(--fg);
}

.score-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--surface);
}

.score-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1.5px solid var(--fg);
    flex-shrink: 0;
}

.score-indicator.pass {
    background: var(--fg);
}

.score-indicator.fail {
    background: var(--bg);
}

.score-name {
    font-size: 0.85rem;
    flex: 1;
}

.score-bar-container {
    width: 80px;
    height: 4px;
    background: var(--surface);
    flex-shrink: 0;
}

.score-bar {
    height: 100%;
    background: var(--fg);
}

.score-value {
    font-family: var(--mono);
    font-size: 0.8rem;
    width: 3.5rem;
    text-align: right;
    flex-shrink: 0;
}

.score-details {
    display: none;
    padding: 0.5rem 0 0.5rem 1.5rem;
    font-size: 0.8rem;
    color: var(--muted);
}

.score-details.open {
    display: block;
}

.score-details code {
    font-size: 0.75rem;
}

/* -------------------------------------------------------- */
/* Status & Badges                                           */
/* -------------------------------------------------------- */

.status-text {
    font-size: 0.85rem;
    margin-top: 0.75rem;
    color: var(--muted);
}

.status-badges {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.badge {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--fg);
}

.badge.installed {
    background: var(--fg);
    color: var(--bg);
}

.badge.missing {
    border-style: dashed;
    color: var(--muted);
}

.badge.loading {
    border-style: dotted;
    color: var(--muted);
}

/* -------------------------------------------------------- */
/* Hero                                                      */
/* -------------------------------------------------------- */

.hero {
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2rem;
    border-bottom: none;
    line-height: 1.3;
}

.hero-sub {
    max-width: 600px;
    color: var(--muted);
    margin-top: 1rem;
}

/* -------------------------------------------------------- */
/* Info Bar                                                  */
/* -------------------------------------------------------- */

.info-bar {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--fg);
    display: flex;
    gap: var(--gap);
    flex-wrap: wrap;
}

.info-item {
    flex: 1;
    min-width: 250px;
}

.info-label {
    display: block;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--muted);
    margin-bottom: 0.3rem;
}

.info-value {
    font-size: 0.85rem;
}

/* -------------------------------------------------------- */
/* How It Works                                              */
/* -------------------------------------------------------- */

.how-section {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid var(--fg);
}

.how-step {
    display: flex;
    gap: 2rem;
    padding: 1.75rem 0;
    border-bottom: 1px solid var(--surface);
}

.how-step:last-child {
    border-bottom: none;
}

.how-number {
    font-family: var(--mono);
    font-size: 2rem;
    font-weight: 500;
    line-height: 1;
    color: var(--fg);
    flex-shrink: 0;
    width: 3rem;
    padding-top: 0.2rem;
}

.how-content h2 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.how-content p {
    color: var(--muted);
    line-height: 1.7;
    margin-bottom: 0;
}

.how-content code {
    color: var(--fg);
}

@media (max-width: 768px) {
    .how-step {
        flex-direction: column;
        gap: 0.5rem;
    }

    .how-number {
        font-size: 1.4rem;
    }
}

/* -------------------------------------------------------- */
/* Footer                                                    */
/* -------------------------------------------------------- */

.footer {
    border-top: 1px solid var(--fg);
    padding: 1rem 0;
    margin-top: 3rem;
}

.footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--gap);
    font-size: 0.75rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* -------------------------------------------------------- */
/* Error                                                     */
/* -------------------------------------------------------- */

.error-box {
    border: 1px dashed var(--fg);
    padding: 0.75rem 1rem;
    margin-top: 0.75rem;
    font-size: 0.85rem;
}

.error-box::before {
    content: "ERROR — ";
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
}