:root {
    font-family: 'Segoe UI', Roboto, sans-serif;
    color-scheme: dark;
    --bg: #050c16;
    --bg-alt: #0d1526;
    --surface: #101c33;
    --surface-alt: #162544;
    --text: #e4f0ff;
    --muted: #8fa0c3;
    --accent: #2bb3ff;
    --accent-strong: #08d6a0;
    --danger: #ff5f6d;
    --shadow: 0 18px 50px rgba(4, 9, 20, 0.55);
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

body.theme-light {
    color-scheme: light;
    --bg: #f7f9fd;
    --bg-alt: #ffffff;
    --surface: #ffffff;
    --surface-alt: #f1f4fb;
    --text: #0c1a2f;
    --muted: #5c6e91;
    --shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
}

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

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(1200px, 92vw);
    margin: 0 auto;
}

.top-nav {
    position: sticky;
    top: 0;
    background: rgba(5, 12, 22, 0.92);
    backdrop-filter: blur(12px);
    z-index: 20;
}

.top-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.top-nav ul {
    list-style: none;
    display: flex;
    gap: 1.25rem;
    padding: 0;
    margin: 0;
}

.logo {
    font-weight: 700;
    letter-spacing: 0.08em;
}

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

.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(61, 122, 241, 0.35), transparent),
        radial-gradient(circle at 80% 30%, rgba(8, 214, 160, 0.35), transparent);
    filter: blur(20px);
    opacity: 0.8;
}

.hero__content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    padding: 4rem 0;
}

.hero__badge {
    display: inline-flex;
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-strong);
}

.hero__lead {
    color: var(--muted);
    max-width: 520px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1.5rem 0;
}

.hero__stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.hero__stats article {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.hero__stats h3 {
    margin: 0;
    font-size: 1.5rem;
}

.hero__stats small {
    color: var(--muted);
}

.hero__visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hmi-screen {
    background: var(--surface-alt);
    padding: 1.5rem;
    border-radius: 1.5rem;
    box-shadow: var(--shadow);
    position: relative;
}

.hmi-screen canvas {
    width: 100%;
    border-radius: 1rem;
    background: #050c16;
}

.hmi-screen__status {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
}

.hmi-screen__status article {
    padding: 0.5rem 0.75rem;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
}

.section {
    padding: 4rem 0;
}

.section--alt {
    background: var(--bg-alt);
}

.section--mnemo {
    background: linear-gradient(135deg, rgba(7, 20, 42, 0.9), rgba(5, 12, 22, 0.95));
}

.section__intro {
    max-width: 640px;
    margin-bottom: 2rem;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.8rem;
    color: var(--accent-strong);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 1.25rem;
    box-shadow: var(--shadow);
}

.card ul {
    padding-left: 1.2rem;
    color: var(--muted);
}

.architecture {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    align-items: center;
}

.architecture__schema {
    background: var(--surface);
    border-radius: 1.25rem;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-shadow: var(--shadow);
}

.architecture__schema div {
    padding: 1rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.03);
    text-align: center;
}

.mnemo {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    align-items: center;
}

.mnemo__panel {
    background: var(--surface);
    border-radius: 1.5rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.mnemo__svg {
    width: 100%;
    height: auto;
}

.mnemo__flow {
    fill: none;
    stroke: url(#flowGradient);
    stroke-width: 6;
    stroke-dasharray: 12;
    animation: flow 2s linear infinite;
}

.mnemo__node {
    fill: rgba(255, 255, 255, 0.05);
    stroke: rgba(8, 214, 160, 0.6);
    stroke-width: 2;
}

.mnemo__sensor {
    fill: rgba(43, 179, 255, 0.2);
    stroke: var(--accent);
    stroke-width: 3;
}

.mnemo__sidebar {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 1.25rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.mnemo__signals,
.mnemo__units {
    display: grid;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.signal-card,
.unit-card {
    border-radius: 1rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    transition: border-color 0.2s ease;
}

.signal-card strong {
    display: flex;
    justify-content: space-between;
}

.signal-card span {
    font-size: 0.85rem;
    color: var(--muted);
}

.signal-card[data-trend="up"] {
    border: 1px solid var(--accent-strong);
}

.signal-card[data-trend="down"] {
    border: 1px solid var(--danger);
}

.unit-card small {
    color: var(--muted);
}

.unit-card[data-status="alert"] {
    border: 1px solid var(--danger);
    color: var(--danger);
}

.unit-card[data-status="maintenance"] {
    border: 1px solid #f9a826;
    color: #f9a826;
}

.timeline {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    padding: 0;
    margin: 0;
}

.timeline li {
    background: var(--surface);
    border-radius: 1.25rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.cases {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.metrics-grid article {
    background: var(--surface);
    padding: 1.25rem;
    border-radius: 1.2rem;
    box-shadow: var(--shadow);
}

.cta__form {
    display: grid;
    gap: 1rem;
    margin-top: 1.5rem;
}

input,
textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border-radius: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.03);
    color: inherit;
    font-size: 1rem;
}

.btn {
    border: none;
    border-radius: 999px;
    padding: 0.8rem 1.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn--primary {
    background: linear-gradient(120deg, var(--accent), var(--accent-strong));
    color: #001220;
}

.btn--ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: inherit;
}

.btn--secondary {
    background: rgba(8, 214, 160, 0.18);
    color: var(--accent-strong);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.footer {
    background: #03070f;
    padding: 2.5rem 0;
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.footer__copy {
    text-align: center;
    color: var(--muted);
    margin-top: 1.5rem;
}

/* Admin */
body.admin {
    background: #040914;
}

.admin-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 3vw;
    background: #03070f;
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.admin-nav__actions {
    display: flex;
    gap: 0.75rem;
}

.admin-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: calc(100vh - 64px);
}

.admin-sidebar {
    background: #050b16;
    padding: 2rem 1.5rem;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.admin-sidebar ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.admin-sidebar button {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 0.7rem;
    border: 1px solid transparent;
    color: inherit;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
}

.admin-sidebar button.is-active {
    border-color: var(--accent);
    color: var(--accent);
}

.admin-content {
    padding: 2rem 3vw;
}

.admin-content__header {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.admin-content__actions .btn {
    min-width: 150px;
}

.panel {
    display: none;
}

.panel.is-visible {
    display: block;
}

.content-form {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.form-block {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 1.2rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.form-block__header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.form-collection {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.form-collection__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
}

.form-card {
    background: rgba(0, 0, 0, 0.35);
    padding: 1rem;
    border-radius: 1rem;
}

.form-card h4 {
    margin-top: 0;
}

.collection-actions {
    display: flex;
    justify-content: flex-end;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: flex-end;
}

.auth-gate {
    position: fixed;
    inset: 0;
    background: rgba(0, 4, 12, 0.92);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99;
}

.auth-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1.2rem;
    box-shadow: var(--shadow);
    width: min(360px, 90vw);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-error {
    color: var(--danger);
    min-height: 1rem;
}

.kanban {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.kanban-column {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 1rem;
    padding: 1rem;
    min-height: 280px;
}

.kanban-card {
    background: var(--surface);
    border-radius: 0.75rem;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 1rem;
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.cards--tight {
    gap: 1rem;
}

.report-summary {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

@keyframes flow {
    from {
        stroke-dashoffset: 0;
    }
    to {
        stroke-dashoffset: 24;
    }
}

@media (max-width: 960px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }

    .admin-sidebar ul {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .admin-sidebar button {
        flex: 1;
        min-width: 140px;
    }
}

@media (max-width: 720px) {
    .hero__content {
        grid-template-columns: 1fr;
    }

    .top-nav ul {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
}