:root {
    --color-bg: #ffffff;
    --color-bg-soft: #f5f7fa;
    --color-bg-alt: #fafbfd;
    --color-surface: #ffffff;
    --color-border: #e1e5ea;
    --color-text: #1b1f23;
    --color-text-muted: #5c6773;
    --color-text-soft: #767e88;
    --color-primary: #0067b8;
    --color-primary-hover: #005a9e;
    --color-primary-text: #ffffff;
    --color-accent: #50e6ff;
    --color-purple: #8661c5;
    --color-teal: #00b294;
    --color-orange: #ff8c00;
    --color-green: #107c10;
    --color-red: #d13438;
    --color-success: #107c10;
    --color-warning: #f7a724;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --font-family: "Segoe UI Variable", "Segoe UI", -apple-system, BlinkMacSystemFont,
        "Helvetica Neue", Arial, sans-serif;
    --content-max: 1180px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

h1, h2, h3, h4 {
    margin: 0;
    color: var(--color-text);
    font-weight: 600;
    letter-spacing: -0.01em;
}

h1:focus {
    outline: none;
}

/* ─── Site header ─────────────────────────────────────────────── */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 32px;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 32px;
}

.site-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    color: var(--color-text);
    font-size: 1rem;
}

.site-brand:hover {
    text-decoration: none;
    color: var(--color-text);
}

.site-brand__logo {
    height: 40px;
    width: auto;
    display: block;
    flex-shrink: 0;
}

.site-brand__name {
    color: var(--color-text);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-left: auto;
}

.site-nav a {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.9rem;
}

.site-nav a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.site-nav__cta {
    color: var(--color-primary) !important;
    font-weight: 600 !important;
}

.site-signout {
    margin: 0;
}

.site-signout__btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 8px 16px;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
}

.site-signout__btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ─── Main / footer chrome ─────────────────────────────────────── */

.site-main {
    flex: 1;
}

.site-footer {
    background-color: var(--color-bg-soft);
    border-top: 1px solid var(--color-border);
    padding: 32px 0;
    margin-top: 80px;
}

.site-footer__inner {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.site-footer__brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.site-footer__logo {
    height: 40px;
    width: auto;
    display: block;
    flex-shrink: 0;
}

.site-footer__brand-text {
    display: flex;
    flex-direction: column;
}

.site-footer__brand strong {
    color: var(--color-text);
    font-size: 0.95rem;
}

.site-footer__meta {
    display: flex;
    flex-direction: column;
    text-align: right;
    gap: 2px;
}

/* ─── Buttons ─────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-primary-text);
}

.btn--primary:hover {
    background-color: var(--color-primary-hover);
    color: #fff;
    text-decoration: none;
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn--ghost {
    background-color: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn--ghost:hover {
    background-color: var(--color-bg-soft);
    border-color: var(--color-text-muted);
    text-decoration: none;
}

.btn--large {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn--large svg {
    width: 20px;
    height: 20px;
}

/* ─── Hero ────────────────────────────────────────────────────── */

.hero {
    background: linear-gradient(180deg, #f5f9ff 0%, #ffffff 100%);
    padding: 80px 0 100px;
    overflow: hidden;
}

.hero__inner {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 32px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero__copy {
    max-width: 620px;
}

.hero__eyebrow {
    display: inline-block;
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 20px;
}

.hero__title {
    font-size: clamp(2rem, 4vw, 3.25rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    color: var(--color-text);
    font-weight: 600;
}

.hero__sub {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0 0 32px;
}

.hero__actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}

.hero__meta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    color: var(--color-text-soft);
    font-size: 0.875rem;
}

.hero__meta-dot {
    opacity: 0.5;
}

.hero__art {
    position: relative;
    height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__glow {
    position: absolute;
    inset: 20px;
    background: radial-gradient(circle at 50% 50%,
        rgba(80, 230, 255, 0.35) 0%,
        rgba(0, 103, 184, 0.15) 35%,
        transparent 70%);
    filter: blur(40px);
    z-index: 0;
}

.hero__card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 380px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transform: perspective(1200px) rotateX(3deg) rotateY(-6deg);
}

.hero__card-bar {
    height: 12px;
    background: linear-gradient(90deg, #e1e8ef 0%, #f1f4f8 100%);
    border-radius: 999px;
}

.hero__card-bar--short {
    width: 60%;
}

.hero__card-bar--medium {
    width: 80%;
}

.hero__card-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 4px 0;
}

.hero__chip {
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.hero__chip--ok {
    background-color: #dff6dd;
    color: #107c10;
}

.hero__chip--warn {
    background-color: #fff4ce;
    color: #8a6d00;
}

/* ─── Sections ────────────────────────────────────────────────── */

.section {
    padding: 80px 0;
}

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

.section--cta {
    background: linear-gradient(135deg, #f5f9ff 0%, #fff 50%, #f5f9ff 100%);
}

.section__inner {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 32px;
}

.section__inner--narrow {
    max-width: 820px;
}

.section__inner--cols {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 64px;
    align-items: start;
}

.section__title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    text-align: center;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.section__title--left {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
}

.section__title--center {
    text-align: center;
}

.section__sub {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
    line-height: 1.6;
}

.section__sub--left {
    text-align: left;
    margin: 0;
}

.section__sub--center {
    text-align: center;
}

/* ─── Features grid ───────────────────────────────────────────── */

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    transition: all 0.2s ease;
}

.feature:hover {
    border-color: transparent;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    margin-bottom: 18px;
}

.feature__icon svg {
    width: 24px;
    height: 24px;
    color: #fff;
}

.feature__icon--blue { background-color: #0067b8; }
.feature__icon--teal { background-color: var(--color-teal); }
.feature__icon--purple { background-color: var(--color-purple); }
.feature__icon--orange { background-color: var(--color-orange); }
.feature__icon--green { background-color: var(--color-green); }
.feature__icon--red { background-color: var(--color-red); }

.feature__title {
    font-size: 1.15rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.feature__desc {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.55;
}

/* ─── Steps ───────────────────────────────────────────────────── */

.steps {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.step {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px;
    position: relative;
}

.step__num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 16px;
}

.step__title {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.step__desc {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ─── Requirements ────────────────────────────────────────────── */

.reqs {
    margin: 0;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 8px 28px;
}

.req {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 20px;
    padding: 18px 0;
    border-bottom: 1px solid var(--color-border);
}

.req:last-child {
    border-bottom: none;
}

.req dt {
    font-weight: 600;
    color: var(--color-text);
}

.req dd {
    margin: 0;
    color: var(--color-text-muted);
}

/* ─── Download card ───────────────────────────────────────────── */

.download-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-md);
}

.download-card__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 24px;
}

.download-card__file {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.download-card__name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--color-text);
    font-family: "Cascadia Code", "Consolas", monospace;
}

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

.download-card__notes {
    margin: 0;
    padding: 0;
    list-style: none;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.download-card__notes li {
    position: relative;
    padding-left: 24px;
}

.download-card__notes li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 7px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--color-primary);
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='4' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
    background-size: 10px;
    background-position: center;
    background-repeat: no-repeat;
}

/* ─── Sign in page ────────────────────────────────────────────── */

.signin-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    background:
        radial-gradient(circle at 20% 20%, rgba(0, 103, 184, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(80, 230, 255, 0.08) 0%, transparent 50%),
        #f5f7fa;
}

.signin-card {
    width: 100%;
    max-width: 420px;
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 48px 40px;
}

.signin-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
}

.signin-brand__logo {
    height: 56px;
    width: auto;
    display: block;
}

.signin-title {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.signin-sub {
    color: var(--color-text-muted);
    margin: 0 0 24px;
    font-size: 0.95rem;
    line-height: 1.55;
}

.signin-error {
    background-color: #fdf3f4;
    border: 1px solid #f1bbbe;
    color: #a4262c;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.signin-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.signin-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.signin-field__label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
}

.signin-input {
    padding: 12px 14px;
    font-family: inherit;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-surface);
    color: var(--color-text);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.signin-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 103, 184, 0.18);
}

.signin-submit {
    margin-top: 8px;
    padding: 13px 24px;
    background-color: var(--color-primary);
    color: var(--color-primary-text);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.signin-submit:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.signin-footnote {
    margin: 24px 0 0;
    text-align: center;
    color: var(--color-text-soft);
    font-size: 0.85rem;
}

/* ─── Responsive ──────────────────────────────────────────────── */

@media (max-width: 960px) {
    .hero {
        padding: 56px 0 64px;
    }

    .hero__inner {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero__art {
        height: 320px;
        order: -1;
    }

    .section {
        padding: 56px 0;
    }

    .section__inner--cols {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .features,
    .steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .site-nav {
        display: none;
    }

    .site-footer__meta {
        text-align: left;
    }
}

@media (max-width: 620px) {
    .site-header__inner {
        padding: 0 20px;
    }

    .section__inner {
        padding: 0 20px;
    }

    .hero__inner {
        padding: 0 20px;
    }

    .features,
    .steps {
        grid-template-columns: 1fr;
    }

    .download-card {
        padding: 24px;
    }

    .download-card__head {
        flex-direction: column;
        align-items: flex-start;
    }

    .req {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .signin-card {
        padding: 32px 24px;
    }
}

/* ─── Blazor error UI (template default) ──────────────────────── */

#blazor-error-ui {
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

.blazor-error-boundary {
    background: #b32121;
    padding: 1rem;
    color: white;
}

.blazor-error-boundary::after {
    content: "An error has occurred.";
}