/* =====================================
   BASE
===================================== */

:root {
    --bg: #0b1220;
    --card: rgba(255, 255, 255, 0.06);
    --card-glow: 0 4px 32px 0 rgba(0, 180, 216, 0.08);
    --accent: #00b4d8;
    --accent2: #48e6c1;
    --muted: #9aa6b2;
    --white: #f8fafc;
    --code-bg: #101a2a;
    --code-border: #1e293b;
    --shadow: 0 2px 16px 0 rgba(0, 0, 0, 0.12);
    --radius: 14px;
    --transition: .18s cubic-bezier(.4, 0, .2, 1);
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: Inter, system-ui, Arial, Helvetica, sans-serif;
    background: linear-gradient(180deg, #071627 0%, #081827 100%);
    color: var(--white);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    position: relative;
}

/* =====================================
   LAYOUT
===================================== */

.wrap {
    max-width: 900px;
    margin: 0 auto;
    padding: 28px 18px 32px 18px;
}

.header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    background: linear-gradient(90deg, rgba(11, 18, 32, 0.98) 80%, rgba(0, 180, 216, 0.03) 100%);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    font-weight: 700;
    font-size: 1.18rem;
    letter-spacing: 0.01em;
    color: var(--white);
    text-shadow: 0 2px 8px rgba(0, 180, 216, 0.08);
}

.content {
    padding: 36px 0 0 0;
}

.panel {
    background: var(--card);
    padding: 32px 28px 28px 28px;
    border-radius: var(--radius);
    box-shadow: var(--card-glow), var(--shadow);
    border: 1.5px solid rgba(0, 180, 216, 0.08);
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--transition), border-color var(--transition);
}

.panel h1 {
    margin-top: 0;
    font-size: 2.1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--accent);
    margin-bottom: 18px;
    text-shadow: 0 2px 16px rgba(0, 180, 216, 0.08);
}

/* Panel section headings */
.panel h2 {
    font-size: 1.3rem;
    color: var(--accent2);
    margin-top: 32px;
    margin-bottom: 10px;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.panel h3,
.panel h4 {
    color: var(--white);
    margin-top: 24px;
    margin-bottom: 8px;
    font-weight: 500;
}

.panel h4 {
    font-size: 1.07rem;
    color: var(--accent);
    margin-top: 18px;
}

/* =====================================
   CODE BLOCK
===================================== */

.code {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    padding: 14px 16px;
    border-radius: 8px;
    overflow: auto;
    color: var(--accent2);
    font-family: 'JetBrains Mono', 'Fira Mono', 'Consolas', monospace;
    font-size: 1.01rem;
    margin-bottom: 18px;
    box-shadow: 0 2px 12px 0 rgba(0, 180, 216, 0.04);
    transition: box-shadow var(--transition);
}

/* =====================================
   NOTES
===================================== */

.notes {
    margin-top: 22px;
    color: var(--muted);
    font-size: 1.01rem;
    background: rgba(0, 180, 216, 0.04);
    border-left: 3px solid var(--accent2);
    padding: 10px 18px;
    border-radius: 8px;
    box-shadow: 0 2px 8px 0 rgba(0, 180, 216, 0.03);
}

/* =====================================
   LANGUAGE SWITCHER (PRO VERSION)
===================================== */

.langs {
    display: flex;
    gap: 8px;
    align-items: center;
    background: none;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
}

.lang {
    background: transparent;
    border: 1.5px solid var(--accent);
    color: var(--accent);
    padding: 6px 18px;
    border-radius: 7px;
    cursor: pointer;
    font-size: 1.01rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
    box-shadow: none;
    outline: none;
    margin: 0 0 0 0;
}

.lang:hover {
    border-color: var(--white);
    color: var(--white);
    background: rgba(0, 180, 216, 0.10);
    box-shadow: 0 2px 8px 0 rgba(0, 180, 216, 0.04);
}

.lang.active {
    background: var(--accent);
    color: #022;
    border-color: var(--accent);
    box-shadow: 0 2px 8px 0 rgba(0, 180, 216, 0.10);
}

/* =====================================
   LANGUAGE VISIBILITY
   (MAIN MAGIC)
===================================== */

html[lang="uk"] .lang-en {
    display: none;
}

html[lang="en"] .lang-uk {
    display: none;
}

/* fallback hidden class (optional) */

.hidden {
    display: none;
}

/* =====================================
   JSON STRUCTURE HIGHLIGHT
===================================== */
.json-struct {
    background: #1a2633;
    color: #aee6ff;
    border: 1px solid #3a4a5a;
    border-radius: 6px;
    padding: 12px 16px;
    margin: 12px 0 24px 0;
    font-size: 15px;
    font-family: 'Fira Mono', 'Consolas', 'Menlo', monospace;
    line-height: 1.6;
    overflow-x: auto;
    box-shadow: 0 2px 8px 0 #0002;
    position: relative;
}

.json-struct:before {
    content: 'JSON';
    position: absolute;
    top: 4px;
    right: 12px;
    font-size: 12px;
    color: #6ec6ff;
    background: #16202b;
    padding: 1px 8px;
    border-radius: 4px;
    letter-spacing: 1px;
    font-weight: bold;
    opacity: 0.85;
}

/* JSON token colors */
.json-struct .j-key {
    color: #ffd580;
    margin-left: 20px;
}

.json-struct .j-string {
    color: #a8ffb0;
}

.json-struct .j-number {
    color: #ffb86b;
}

.json-struct .j-boolean {
    color: #66d9ef;
}

.json-struct .j-null {
    color: #ff6b6b;
}

.json-struct .j-array {
    display: block;
    /* background: red; */
    margin-left: 29px
}