/* Fonts are self-hosted (SIL OFL, see fonts/OFL-*.txt) so no page view
   leaks to a third-party font CDN. */
@font-face {
    font-family: "Orbitron";
    src: url("fonts/orbitron-latin-wght.woff2") format("woff2");
    font-weight: 400 900;
    font-display: swap;
}

@font-face {
    font-family: "Rajdhani";
    src: url("fonts/rajdhani-latin-400.woff2") format("woff2");
    font-weight: 400;
    font-display: swap;
}

@font-face {
    font-family: "Rajdhani";
    src: url("fonts/rajdhani-latin-600.woff2") format("woff2");
    font-weight: 600;
    font-display: swap;
}

:root {
    color-scheme: light dark;
    --bg: #eef6f8;
    --card-bg: #ffffff;
    --field-bg: #f6fbfc;
    --text: #0b2a33;
    --heading: #007c91;
    --muted: #4a6670;
    /* Light-mode colours meet WCAG AA: text >= 4.5:1, borders/focus >= 3:1
       against the card. Hover darkens rather than lightens for that reason. */
    --accent: #007a8f;
    --accent-hover: #00606f;
    --accent-text: #ffffff;
    --border: #0089a3;
    --focus: #005f70;
    --error: #b33a0a;
    --ok: #087a4d;
    --glow: 0 0 0 transparent;
    --glow-strong: 0 0 6px rgba(0, 169, 199, 0.35);
    --text-glow: none;
    --font-display: "Orbitron", "Rajdhani", sans-serif;
    --font-body: "Rajdhani", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 1.125rem;
    padding: 1.5rem;
}

.card {
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: 6px;
    padding: 2rem;
    max-width: 480px;
    width: 100%;
    box-shadow: var(--glow-strong), inset var(--glow);
}

h1, h2 {
    font-family: var(--font-display);
    color: var(--heading);
    text-shadow: var(--text-glow);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

h1 {
    margin-top: 0;
    font-size: 1.3rem;
    font-weight: 700;
}

h2 {
    font-size: 1rem;
    font-weight: 600;
    margin: 1.5rem 0 0.4rem;
}

h2:first-of-type {
    margin-top: 0.5rem;
}

.muted {
    color: var(--muted);
    font-size: 1.0625rem;
    line-height: 1.4;
}

.muted.small {
    font-size: 0.95rem;
}

.error {
    color: var(--error);
    font-size: 1rem;
    font-weight: 600;
}

/* Error/status elements stay in the DOM (so live regions are announced)
   and simply collapse while empty. */
.error:empty {
    display: none;
}

label {
    display: block;
    margin: 1.1rem 0 0.4rem;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--heading);
}

textarea, select, input[type="text"], input[type="password"], input[type="email"] {
    width: 100%;
    padding: 0.6rem 0.7rem;
    border: 2px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--field-bg);
    color: var(--text);
    resize: vertical;
    transition: box-shadow 0.15s, border-color 0.15s;
}

textarea:focus, select:focus, input:focus {
    border-color: var(--accent-hover);
    box-shadow: var(--glow-strong);
}

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

::placeholder {
    color: var(--muted);
    opacity: 1;
}

/* Text for screen readers only (e.g. "Link copied" announcements). */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

button {
    margin-top: 1.5rem;
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--accent);
    border-radius: 4px;
    background: var(--accent);
    color: var(--accent-text);
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.15s, box-shadow 0.15s, color 0.15s;
}

button:disabled {
    opacity: 0.6;
    cursor: wait;
}

button:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    box-shadow: var(--glow-strong);
}

.link-box {
    margin-top: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.link-box input,
.link-box textarea {
    flex: 1;
    min-width: 0;
}

.link-box button {
    margin-top: 0;
    width: auto;
    flex-shrink: 0;
    padding: 0.6rem 1rem;
}

#mail-form {
    margin-top: 0.75rem;
}

#mail-signin {
    margin-top: 0.75rem;
}

#mail-signin a {
    color: var(--accent);
}

.signed-in {
    margin: 0 0 0.4rem;
    color: var(--muted);
    font-size: 0.95rem;
}

/* A <button> that looks like the footer links (e.g. "Sign out"). */
.link-button {
    margin: 0;
    width: auto;
    padding: 0;
    border: 0;
    background: none;
    color: var(--muted);
    font: inherit;
    letter-spacing: normal;
    text-transform: none;
    text-decoration: underline;
    cursor: pointer;
}

.link-button:hover {
    background: none;
    box-shadow: none;
    color: var(--accent);
}

.login-code {
    font-family: var(--font-display);
    font-size: 2rem;
    letter-spacing: 0.15em;
    color: var(--heading);
    text-shadow: var(--text-glow);
    text-align: center;
}

[hidden] {
    display: none !important;
}

#mail-status:empty {
    display: none;
}

.status-text-ok {
    color: var(--ok);
}

.link-back {
    display: inline-block;
    margin-top: 1.5rem;
    color: var(--accent);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: 0.875rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.link-back:hover {
    text-decoration: underline;
    text-shadow: var(--text-glow);
}

.status-ok, .status-warn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.35rem 0.75rem;
    border: 2px solid currentColor;
    border-radius: 4px;
    margin: 0.25rem 0 1.25rem;
}

.status-ok {
    color: var(--ok);
    background: rgba(8, 122, 77, 0.1);
    background: color-mix(in srgb, var(--ok) 12%, transparent);
}

.status-warn {
    color: var(--error);
    background: rgba(179, 58, 10, 0.1);
    background: color-mix(in srgb, var(--error) 12%, transparent);
}

.page-footer {
    margin-top: 2rem;
    text-align: center;
}

.page-footer a {
    color: var(--muted);
    font-size: 0.95rem;
    text-decoration: none;
}

.page-footer a:hover {
    text-decoration: underline;
    color: var(--accent);
}

.app-version {
    color: var(--muted);
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
}

/* Dark mode: the Grid. Pure black, neon cyan lines, orange for warnings. */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --card-bg: #000000;
        --field-bg: #000000;
        --text: #d6fbff;
        --heading: #00f0ff;
        --muted: #6fd8e6;
        --accent: #00f0ff;
        --accent-hover: #7dfaff;
        --accent-text: #000000;
        --focus: #7dfaff;
        --border: #00f0ff;
        --error: #ff8a1f;
        --ok: #39ff88;
        --glow: 0 0 12px rgba(0, 240, 255, 0.25);
        --glow-strong: 0 0 8px rgba(0, 240, 255, 0.7), 0 0 22px rgba(0, 240, 255, 0.35);
        --text-glow: 0 0 6px rgba(0, 240, 255, 0.75), 0 0 16px rgba(0, 240, 255, 0.35);
    }

    .status-ok, .status-warn {
        text-shadow: 0 0 6px currentColor;
        box-shadow: 0 0 8px currentColor;
    }

    .error {
        text-shadow: 0 0 6px var(--error);
    }

    option {
        background: #000000;
        color: var(--text);
    }
}