:root {
    --bg-primary: #0d0e17;
    --bg-surface: #151722;
    --bg-card: #1a1c2e;
    --bg-input: #12131f;
    --border: #2a2d42;
    --border-focus: #4a4e6a;
    --text-primary: #e0e0e8;
    --text-secondary: #8b8fa3;
    --text-muted: #555873;
    --accent-red: #e05252;
    --accent-red-dim: rgba(224, 82, 82, 0.15);
    --accent-green: #28c840;
    --accent-green-dim: rgba(40, 200, 64, 0.12);
    --accent-blue: #4a7bcc;
    --accent-amber: #e0a030;
    --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", ui-monospace, monospace;
    --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--accent-red);
    text-decoration: none;
    transition: opacity 0.15s;
}

a:hover {
    opacity: 0.8;
}

/* --- Layout --- */

.page-wrapper {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.page-wrapper--narrow {
    max-width: 480px;
}

/* --- Navigation --- */

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--border);
}

.nav__brand {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.nav__brand strong {
    color: var(--text-primary);
}

.nav__links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

.nav__links a {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: lowercase;
}

.nav__links a:hover {
    color: var(--text-primary);
}

/* --- Landing page --- */

.hero {
    text-align: center;
    padding: 5rem 0 3rem;
}

.hero__title {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.hero__sub {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.hero__divider {
    width: 80px;
    height: 2px;
    background: var(--accent-red);
    margin: 1.5rem auto 0;
    border-radius: 1px;
}

/* --- Lab cards --- */

.labs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
    padding: 2rem 0;
}

.lab-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.75rem;
    transition: border-color 0.2s;
    display: flex;
    flex-direction: column;
}

.lab-card:hover {
    border-color: var(--border-focus);
}

.lab-card__badges {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 0.2rem 0.6rem;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge--category {
    background: var(--accent-red-dim);
    color: var(--accent-red);
    border: 1px solid rgba(224, 82, 82, 0.3);
}

.badge--difficulty {
    background: var(--accent-green-dim);
    color: var(--accent-green);
    border: 1px solid rgba(40, 200, 64, 0.25);
}

.lab-card__title {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
}

.lab-card__desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.55;
    flex: 1;
    margin-bottom: 1.25rem;
}

.lab-card__link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-red);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.lab-card__link::after {
    content: "→";
}

/* --- Forms --- */

.form-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin-top: 1.5rem;
}

.form-container__title {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.form-container__sub {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    text-transform: lowercase;
}

.form-group input {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    transition: border-color 0.15s;
    outline: none;
}

.form-group input:focus {
    border-color: var(--accent-red);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.btn {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 0.7rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.15s;
    text-align: center;
    text-decoration: none;
}

.btn:hover {
    opacity: 0.85;
}

.btn--primary {
    background: var(--accent-red);
    color: #fff;
    width: 100%;
}

.btn--outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.btn--small {
    padding: 0.45rem 1rem;
    font-size: 0.75rem;
}

/* --- Alerts --- */

.alert {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.7rem 1rem;
    border-radius: 4px;
    margin-bottom: 1.25rem;
    border: 1px solid;
}

.alert--error {
    background: rgba(224, 82, 82, 0.08);
    border-color: rgba(224, 82, 82, 0.3);
    color: var(--accent-red);
}

.alert--success {
    background: var(--accent-green-dim);
    border-color: rgba(40, 200, 64, 0.25);
    color: var(--accent-green);
}

.alert--info {
    background: rgba(74, 123, 204, 0.08);
    border-color: rgba(74, 123, 204, 0.25);
    color: var(--accent-blue);
}

/* --- Intro page --- */

.intro {
    padding: 3rem 0;
}

.intro__title {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.intro__meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.intro__section {
    margin-bottom: 2rem;
}

.intro__section h3 {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-red);
    margin-bottom: 0.75rem;
    text-transform: lowercase;
}

.intro__section p,
.intro__section li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.intro__section ul {
    list-style: none;
    padding-left: 0;
}

.intro__section li::before {
    content: "›";
    color: var(--accent-red);
    margin-right: 0.5rem;
    font-weight: 700;
}

.intro__section li {
    margin-bottom: 0.35rem;
}

.intro__section code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background: var(--bg-input);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    color: var(--accent-red);
}

/* --- Dashboard --- */

.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.dashboard-header__user {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.dashboard-header__user strong {
    color: var(--text-primary);
}

.flag-box {
    background: var(--bg-card);
    border: 1px solid var(--accent-green);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.flag-box__label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-green);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.75rem;
}

.flag-box__value {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--text-primary);
    background: var(--bg-input);
    padding: 0.75rem 1rem;
    border-radius: 4px;
    display: inline-block;
    word-break: break-all;
    user-select: all;
}

.hint-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.hint-box__title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-amber);
    margin-bottom: 0.75rem;
}

.hint-box p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Passkey UI --- */

.passkey-status {
    text-align: center;
    padding: 3rem 0;
}

.passkey-status__icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.passkey-status__text {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

#passkey-error {
    display: none;
}

/* --- Banned page --- */

.banned {
    text-align: center;
    padding: 5rem 0;
}

.banned__code {
    font-family: var(--font-mono);
    font-size: 4rem;
    color: var(--accent-red);
    font-weight: 700;
}

.banned__message {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* --- Honeypot --- */

.hp-field {
    position: absolute;
    left: -9999px;
    top: -9999px;
    opacity: 0;
    height: 0;
    width: 0;
    overflow: hidden;
    tabindex: -1;
}

/* --- Footer --- */

.footer {
    text-align: center;
    padding: 3rem 0 2rem;
    border-top: 1px solid var(--border);
    margin-top: 3rem;
}

.footer__text {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* --- Responsive --- */

@media (max-width: 600px) {
    .hero__title { font-size: 1.75rem; }
    .nav { padding: 1rem; }
    .page-wrapper { padding: 1.5rem 1rem; }
    .form-container { padding: 1.5rem; }
}