:root {
    --ink-900: #0e2338;
    --ink-800: #15324e;
    --line: #3e6e92;
    --line-bright: #8fc4e8;
    --paper: #f3f7fa;
    --paper-dim: #a9c2d6;
    --stamp: #e8963c;
    --stamp-dark: #c97b28;
    --radius: 3px;
    --maxw: 880px;
    --grid-line: rgba(143, 196, 232, 0.05);
}
:root[data-theme='light'] {
    --ink-900: #f3f7fa;
    --ink-800: #e3edf4;
    --line: #6e97b8;
    --line-bright: #1f6fa8;
    --paper: #12283d;
    --paper-dim: #4c6478;
    --stamp: #d9791e;
    --stamp-dark: #b8630f;
    --grid-line: rgba(31, 111, 168, 0.06);
}
* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    background: var(--ink-900);
    color: var(--paper);
    font-family: 'IBM Plex Sans', system-ui, sans-serif;
    font-size: 17px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition:
        background 0.2s ease,
        color 0.2s ease;
}
.grid-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 40px 40px;
}
a {
    color: inherit;
}
a:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--line-bright);
    outline-offset: 3px;
}
h1,
h2,
.brand {
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-weight: 700;
    margin: 0;
}
h1 {
    font-size: clamp(2.1rem, 5vw, 3.3rem);
    line-height: 1.1;
    letter-spacing: -0.01em;
}
h2 {
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    font-weight: 500;
    margin-bottom: 1.5rem;
}
.brand {
    font-size: 1.05rem;
    letter-spacing: 0.02em;
    color: var(--line-bright);
    margin-bottom: 2rem;
    display: inline-block;
}
.lede {
    max-width: 52ch;
    color: var(--paper-dim);
    font-size: 1.05rem;
}
header,
main,
footer {
    position: relative;
    z-index: 1;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 18px 0;
    backdrop-filter: blur(0.5rem);
    background-color: color-mix(in srgb, var(--ink-900), transparent 90%);
}
.logo-link {
    display: inline-flex;
    align-items: center;
    line-height: 0;
    /* background: #0e2338; */
    padding: 7px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--line);
}
.logo-img {
    height: 26px;
    width: auto;
    display: block;
}
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border-radius: var(--radius);
    background: transparent;
    border: 1px solid var(--line);
    color: var(--paper);
    cursor: pointer;
    transition:
        border-color 0.15s ease,
        color 0.15s ease;
}
.theme-toggle:hover {
    border-color: var(--line-bright);
    color: var(--line-bright);
}
.theme-toggle .icon-sun {
    display: none;
}
:root[data-theme='light'] .theme-toggle .icon-moon {
    display: none;
}
:root[data-theme='light'] .theme-toggle .icon-sun {
    display: block;
}

.hero {
    padding: 32px 24px 40px;
}
.title-block {
    max-width: var(--maxw);
    margin: 0 auto;
    position: relative;
    border: 1px solid var(--line);
    padding: 56px clamp(24px, 5vw, 64px);
    animation: draw-in 0.7s ease-out both;
}
@keyframes draw-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
@media (prefers-reduced-motion: reduce) {
    .title-block {
        animation: none;
    }
}

.mark {
    position: absolute;
    font-family: 'IBM Plex Mono', monospace;
    color: var(--line);
    font-size: 1.1rem;
    line-height: 1;
}
.mark-tl {
    top: -0.6em;
    left: -0.6em;
}
.mark-tr {
    top: -0.6em;
    right: -0.6em;
}
.mark-bl {
    bottom: -0.6em;
    left: -0.6em;
}
.mark-br {
    bottom: -0.6em;
    right: -0.6em;
}

.fields {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 24px 40px;
    margin: 2.5rem 0 0;
    padding-top: 1.75rem;
    border-top: 1px solid var(--line);
    list-style: none;
}
.fields div {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.fields dt {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--paper-dim);
}
.fields dd {
    margin: 0;
    font-size: 0.95rem;
}

.cta-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 2.25rem;
}
.btn {
    display: inline-block;
    padding: 13px 26px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition:
        background 0.15s ease,
        color 0.15s ease,
        border-color 0.15s ease;
}
.btn-primary {
    background: var(--stamp);
    color: var(--ink-900);
    font-weight: 600;
}
.btn-primary:hover {
    background: var(--stamp-dark);
}
.btn-secondary {
    border-color: var(--line);
    color: var(--paper);
}
.btn-secondary:hover {
    border-color: var(--line-bright);
    color: var(--line-bright);
}

.section {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 64px 24px;
    border-top: 1px solid var(--ink-800);
}
.section p {
    max-width: 64ch;
    color: var(--paper-dim);
}

.schedule {
    list-style: none;
    margin: 0;
    padding: 0;
}
.schedule li {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 32px;
    padding: 20px 0;
    border-top: 1px solid var(--ink-800);
}
.schedule li:first-child {
    border-top: none;
    padding-top: 0;
}
.item-name {
    flex: 0 0 260px;
    font-weight: 600;
    font-family: 'Space Grotesk', sans-serif;
}
.item-desc {
    flex: 1 1 320px;
    color: var(--paper-dim);
}

.tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0;
    padding: 0;
}
.tags li {
    border: 1px solid var(--line);
    padding: 6px 14px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    border-radius: var(--radius);
    color: var(--paper-dim);
}

.specs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 28px 32px;
    margin: 0;
    list-style: none;
    padding: 0;
}
.specs div {
    border-top: 1px solid var(--ink-800);
    padding-top: 14px;
}
.specs dt {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    margin-bottom: 4px;
}
.specs dd {
    margin: 0;
    color: var(--paper-dim);
}

.plus-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 12px 28px;
    padding: 0;
    margin: 1.5rem 0 0;
}
.plus-list li {
    position: relative;
    padding-left: 20px;
    color: var(--paper-dim);
}
.plus-list li::before {
    content: '+';
    position: absolute;
    left: 0;
    color: var(--line-bright);
    font-family: 'IBM Plex Mono', monospace;
}

.contact {
    padding: 64px 24px 40px;
}
.title-block--footer {
    padding: 48px clamp(24px, 5vw, 64px);
}
.title-block--footer p {
    max-width: 52ch;
    color: var(--paper-dim);
    margin: 1rem 0 0;
}
.social-row {
    display: flex;
    gap: 24px;
    margin-top: 2rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    list-style: none;
    padding: 0;
}
.social-row a {
    text-decoration: none;
    border-bottom: 1px solid var(--line);
    padding-bottom: 2px;
}
.social-row a:hover {
    color: var(--line-bright);
    border-color: var(--line-bright);
}

.fine-print {
    max-width: var(--maxw);
    margin: 32px auto 0;
    padding: 0 24px;
    color: var(--paper-dim);
    font-size: 0.82rem;
    text-align: center;
}

@media (max-width: 640px) {
    .fields {
        grid-template-columns: 1fr;
    }
    .item-name {
        flex-basis: 100%;
    }
}