/* === Systems Tinkerer / robnet.dev style === */

:root {
    --bg: #05090c;
    --panel: #10161a;
    --text: #d8f7df;
    --muted: #9ab7a2;
    --green: #00ff7f;
    --green-soft: rgba(0, 255, 127, 0.12);
    --border: rgba(0, 255, 127, 0.25);
    --border-soft: rgba(255, 255, 255, 0.1);
    --curtain: #030607;
    --error: #ff6666;
    --error-soft: rgba(255, 80, 80, 0.12);
    --error-border: rgba(255, 80, 80, 0.3);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: 16px;
    line-height: 1.7;
}

body.has-curtain {
    overflow: hidden;
}

a {
    color: var(--green);
    text-decoration: none;
}

a:hover {
    text-decoration: none;
}

/* Header navigation */
.site-header {
    width: 100%;
}

.top-nav {
    width: 100%;
    padding: 18px 16px 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* Main page layout */
main {
    width: min(920px, calc(100% - 32px));
    margin: 0 auto;
    padding: 18px 0 32px;
}

body.has-curtain main {
    opacity: 0;
    transition: opacity 0.45s ease;
}

/* Systems emblem */
.systems-emblem {
    display: flex;
    justify-content: center;
    margin: 18px auto 22px;
}

.systems-emblem img {
    width: min(220px, 48vw);
    height: auto;
    display: block;
    border-radius: 50%;
    filter: drop-shadow(0 0 18px rgba(0, 255, 127, 0.22));
}

/* Typography */
h1 {
    margin: 0 0 24px;
    color: var(--green);
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.1;
    text-align: center;
    letter-spacing: -0.04em;
}

h1 span {
    display: block;
    color: var(--muted);
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    font-weight: normal;
    letter-spacing: 0;
    margin-top: 12px;
}

h2 {
    color: var(--green);
    font-size: 1.35rem;
    text-align: center;
    margin: 0 0 14px;
}

p {
    margin: 0 0 1.2rem;
}

ul {
    margin: 0 0 1.2rem 1.2rem;
    padding: 0;
}

li {
    margin: 0.35rem 0;
}

/* Intro */
.intro {
    max-width: 760px;
    margin: 0 auto 2rem;
    text-align: center;
    font-size: 1.05rem;
}

.intro strong {
    color: var(--green);
}

/* Sections */
.project-section,
.archive-section,
.ability-section,
.contact-section {
    margin: 42px 0;
}

.section-intro {
    max-width: 760px;
    margin: 0 auto 28px;
    text-align: center;
    color: var(--muted);
    font-size: 1rem;
}

/* Cards */
.ability-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin: 36px 0;
}

.ability-box {
    display: block;
    min-height: 160px;
    padding: 22px;
    background: var(--panel);
    border: 1px solid var(--border-soft);
    border-radius: 14px;
    color: var(--text);
}

.ability-box strong {
    display: block;
    color: var(--green);
    font-size: 1.05rem;
    margin-bottom: 10px;
}

.ability-box p {
    margin: 0;
    color: var(--text);
}

/* Archive callout */
.archive-note {
    max-width: 820px;
    margin: 28px auto 0;
    padding: 22px;
    background: var(--green-soft);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-align: center;
    color: var(--text);
}

.archive-link {
    text-align: center;
    margin: 28px auto 0;
}

.archive-link a,
.robnet-button {
    display: inline-block;
    border: 1px solid var(--green);
    border-radius: 8px;
    padding: 12px 18px;
    color: var(--green);
    text-decoration: none;
    transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.archive-link a:hover,
.robnet-button:hover {
    background: var(--green);
    color: #041008;
    transform: translateY(-1px);
}

/* Highlight section */
.highlight-box {
    background: var(--green-soft);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px;
    margin: 38px 0 30px;
    text-align: center;
}

.highlight-box strong {
    color: var(--green);
}

.closing {
    max-width: 760px;
    margin: 0 auto 34px;
    text-align: center;
}

/* Contact section */
.contact-section {
    margin-top: 48px;
    margin-bottom: 42px;
}

.contact-panel,
.legal-panel {
    max-width: 820px;
    margin: 30px auto;
    padding: 28px;
    background: var(--panel);
    border: 1px solid var(--border-soft);
    border-radius: 14px;
}

.legal-panel h2 {
    text-align: left;
    margin-top: 2rem;
}

.legal-panel h2:first-child {
    margin-top: 0;
}

.contact-form p {
    margin-bottom: 1.15rem;
}

.contact-form label {
    display: inline-block;
    margin-bottom: 0.4rem;
    color: var(--green);
    font-weight: bold;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 13px 15px;
    border: 1px solid var(--border-soft);
    border-radius: 10px;
    background: #070c10;
    color: var(--text);
    font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(0, 255, 127, 0.08);
}

.contact-form textarea {
    min-height: 190px;
    resize: vertical;
}

.honeypot {
    display: none;
}

.privacy-note {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.55;
}

.privacy-note a:hover,
.direct-mail a:hover {
    opacity: 0.78;
}

.contact-actions {
    display: flex;
    justify-content: center;
    margin-top: 24px;
}

.form-message {
    max-width: 820px;
    margin: 28px auto;
    padding: 22px;
    border-radius: 14px;
    text-align: center;
}

.form-success {
    background: var(--green-soft);
    border: 1px solid var(--border);
}

.form-success strong {
    color: var(--green);
}

.form-error {
    background: var(--error-soft);
    border: 1px solid var(--error-border);
}

.form-error strong {
    color: var(--error);
}

.direct-mail {
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
}

/* Footer hint */
.hint {
    max-width: 760px;
    margin: 0 auto 18px;
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
}

/* Shared button style */
.startBtn {
    appearance: none;
    border: 1px solid var(--green);
    background: transparent;
    color: var(--green);
    border-radius: 8px;
    padding: 12px 20px;
    font: inherit;
    white-space: nowrap;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.startBtn:hover {
    background: var(--green);
    color: #041008;
    transform: translateY(-1px);
}

/* Footer menu */
.footer-menu {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    margin: 26px auto 14px;
    text-align: center;
}

.footer-menu a,
.footer-menu .footer-link {
    color: var(--green);
    text-decoration: none;
    font-size: 0.9rem;
    transition: opacity 0.15s ease;
}

.footer-menu a:hover,
.footer-menu .footer-link:hover {
    color: var(--green);
    text-decoration: none;
    opacity: 0.78;
}

.copyright {
    text-align: center;
    color: var(--muted);
    font-size: 0.82rem;
    margin-top: 8px;
}

/* Back to top */
.back-to-top {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 42px;
    height: 42px;
    margin: 28px auto 14px;
    border: 1px solid var(--green);
    border-radius: 50%;
    color: var(--green);
    text-decoration: none;
    font-size: 1.4rem;
    line-height: 1;
    transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.back-to-top:hover {
    background: var(--green);
    color: #041008;
    transform: translateY(-2px);
}

/* Curtain */
#curtain {
    position: fixed;
    inset: 0;
    display: flex;
    z-index: 9999;
    background: radial-gradient(120% 80% at 50% -10%, rgba(255, 255, 255, 0.06), transparent 60%);
    transition: opacity 0.2s ease;
}

#curtain.open {
    pointer-events: none;
}

#curtain .left,
#curtain .right {
    flex: 1;
    background: var(--curtain);
    background-image: repeating-linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.03) 0 6px,
        transparent 6px 14px
    );
    box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.6);
    transform: translateX(0);
    transition: transform 1.6s ease-in-out;
}

#curtain.open .left {
    transform: translateX(-100%);
}

#curtain.open .right {
    transform: translateX(100%);
}

/* Mobile optimisation */
@media (max-width: 760px) {
    body {
        font-size: 15px;
    }

    .top-nav {
        padding-top: 14px;
        padding-bottom: 4px;
        gap: 8px;
    }

    main {
        width: min(100% - 24px, 920px);
        padding-top: 16px;
    }

    .systems-emblem {
        margin-top: 10px;
        margin-bottom: 18px;
    }

    .systems-emblem img {
        width: min(170px, 52vw);
    }

    .ability-list {
        grid-template-columns: 1fr;
    }

    .ability-box {
        min-height: auto;
    }

    .contact-panel,
    .legal-panel {
        padding: 20px;
    }

    .startBtn {
        padding: 10px 13px;
    }

    .footer-menu {
        gap: 12px;
    }
}