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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #0a0a0a;
    color: #e8e8e8;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
}

.container { max-width: 640px; width: 100%; margin: auto; }

h1 {
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: #666;
    margin-bottom: 3rem;
    text-align: center;
}

.id-display {
    text-align: center;
    margin-bottom: 2rem;
}

.id-chars {
    display: flex;
    justify-content: center;
    gap: .5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.id-char {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .3rem;
}

.id-char .cjk {
    font-size: 2.4rem;
    line-height: 1;
    color: #fff;
}

.id-char .word {
    font-size: .65rem;
    color: #555;
    letter-spacing: .05em;
    text-transform: uppercase;
}

.id-raw {
    font-size: .85rem;
    color: #444;
    letter-spacing: .1em;
    margin-top: .5rem;
}

.warning {
    background: #1a1400;
    border: 1px solid #3a2e00;
    border-radius: 6px;
    padding: 1rem 1.2rem;
    font-size: .85rem;
    color: #c8a84a;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.input-tabs {
    display: flex;
    gap: .4rem;
    margin-bottom: 1rem;
}

.input-tab {
    background: transparent;
    border: 1px solid #2a2a2a;
    border-radius: 5px;
    color: #444;
    font-size: .78rem;
    padding: .4rem .9rem;
    cursor: pointer;
    transition: color .15s, border-color .15s;
}
.input-tab:hover { color: #777; border-color: #444; }
.input-tab.active { color: #aaa; border-color: #555; }

.tab-panel { }
.tab-panel p {
    font-size: .8rem;
    color: #555;
    margin-bottom: .75rem;
    line-height: 1.5;
}

.explainer-section {
    margin-bottom: 2rem;
}

.lang-toggle {
    display: flex;
    gap: .4rem;
    margin-bottom: .75rem;
}

.lang-btn {
    background: transparent;
    border: 1px solid #2a2a2a;
    border-radius: 5px;
    color: #444;
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .1em;
    padding: .35rem .8rem;
    cursor: pointer;
    transition: color .15s, border-color .15s;
}
.lang-btn:hover { color: #777; border-color: #444; }
.lang-btn.active { color: #bbb; border-color: #666; }

.lang-content {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.explainer-block {
    border: 1px solid #1a1a1a;
    padding: 1.2rem 1.3rem;
}
.explainer-block:first-child { border-radius: 6px 6px 0 0; }
.explainer-block:last-child  { border-radius: 0 0 6px 6px; }
.explainer-block:only-child  { border-radius: 6px; }

.explainer-label {
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #888;
    margin-bottom: 1.1rem;
}

.explainer-block p {
    font-size: 1rem;
    color: #bbb;
    line-height: 1.85;
    margin-bottom: 1rem;
}
.explainer-block p:last-child { margin-bottom: 0; }
.explainer-block strong { color: #fff; font-weight: 700; }
.explainer-block em { color: #ccc; font-style: italic; }
.explainer-block q {
    color: #aaa;
    quotes: "\201E" "\201D";
    font-style: italic;
}
.explainer-block q::before { content: open-quote; }
.explainer-block q::after  { content: close-quote; }

.scenario-block { background: #0f0f0f; }
.gdpr-block     { background: #0a0a0a; }

.scenario-invert {
    color: #e8e8e8 !important;
    font-weight: 600;
    border-top: 1px solid #222;
    padding-top: .9rem;
    margin-top: .1rem;
}

.actions {
    display: flex;
    flex-direction: column;
    gap: .75rem;
    margin-bottom: 2rem;
}

.btn {
    padding: .85rem 1.5rem;
    border-radius: 6px;
    font-size: .9rem;
    cursor: pointer;
    border: none;
    width: 100%;
    transition: opacity .15s;
}
.btn:hover { opacity: .85; }

.btn-primary {
    background: #fff;
    color: #000;
    font-weight: 600;
}

.btn-secondary {
    background: transparent;
    color: #888;
    border: 1px solid #333;
}

.own-id-form { display: none; }
.own-id-form.visible { display: block; }

.own-id-form p {
    font-size: .8rem;
    color: #555;
    margin-bottom: .75rem;
    line-height: 1.5;
}

.own-id-form input {
    width: 100%;
    background: #111;
    border: 1px solid #333;
    border-radius: 6px;
    padding: .75rem 1rem;
    color: #fff;
    font-size: 1.1rem;
    letter-spacing: .15em;
    margin-bottom: .75rem;
    outline: none;
}
.own-id-form input:focus { border-color: #555; }
.own-id-form input.error { border-color: #a03030; }

.error-msg {
    font-size: .8rem;
    color: #a05050;
    margin-bottom: .75rem;
    display: none;
}
.error-msg.visible { display: block; }

.divider {
    text-align: center;
    font-size: .75rem;
    color: #333;
    margin: 1.5rem 0;
    position: relative;
}
.divider::before, .divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 45%;
    height: 1px;
    background: #222;
}
.divider::before { left: 0; }
.divider::after { right: 0; }

/* Key-value store */
.store-section { margin-bottom: 2rem; }

.store-label {
    font-size: .7rem;
    color: #333;
    letter-spacing: .12em;
    text-transform: uppercase;
    margin-bottom: .75rem;
}

.store-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.25rem;
}
.store-table th {
    font-size: .68rem;
    color: #333;
    text-transform: uppercase;
    letter-spacing: .1em;
    text-align: left;
    padding: .4rem .5rem;
    border-bottom: 1px solid #1a1a1a;
}
.store-table td {
    padding: .55rem .5rem;
    border-bottom: 1px solid #141414;
    vertical-align: middle;
}
.store-table td.td-key {
    font-family: monospace;
    font-size: .8rem;
    color: #555;
    width: 130px;
}
.store-table td.td-val {
    font-size: .85rem;
    color: #ccc;
    word-break: break-all;
}
.store-table td.td-act {
    width: 60px;
    text-align: right;
    white-space: nowrap;
}

.store-empty {
    font-size: .8rem;
    color: #333;
    text-align: center;
    padding: 1.5rem 0;
    border-top: 1px solid #141414;
    border-bottom: 1px solid #141414;
    margin-bottom: 1.25rem;
}

.btn-act {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: .75rem;
    padding: .2rem .35rem;
    border-radius: 3px;
    color: #444;
}
.btn-act:hover { color: #888; }
.btn-act.del:hover { color: #a05050; }

.store-form { }
.store-form-row {
    display: flex;
    gap: .5rem;
    align-items: stretch;
}
.store-form input {
    background: #111;
    border: 1px solid #222;
    border-radius: 6px;
    padding: .6rem .75rem;
    color: #fff;
    font-size: .85rem;
    outline: none;
}
.store-form input:focus { border-color: #444; }
.store-form input.error { border-color: #a03030; }
.store-form input[name="kv_key"] { width: 130px; flex-shrink: 0; font-family: monospace; }
.store-form input[name="kv_value"] { flex: 1; }
.store-form .btn { width: auto; padding: .6rem 1rem; font-size: .85rem; }

footer {
    margin-top: 3rem;
    text-align: center;
    font-size: .72rem;
    color: #333;
    line-height: 1.8;
}
footer a { color: #444; text-decoration: none; }
footer a:hover { color: #666; }