:root {
    --bg: #0b0e14;
    --panel: #131826;
    --panel2: #0f1420;
    --line: #232b3f;
    --text: #e8ecf5;
    --muted: #8b94ab;
    --accent: #ffb454;
    --accent2: #ff8a3d;
    --root: #ffb454;
    --third: #45d6a5;
    --fifth: #5aa2ff;
    --seventh: #b78cff;
    --ext: #ff7eb0;
    --radius: 18px;
}

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

html {
    -webkit-text-size-adjust: 100%
}

body {
    background:
        radial-gradient(1200px 600px at 80% -10%, rgba(255, 138, 61, .09), transparent 60%),
        radial-gradient(900px 500px at -10% 30%, rgba(90, 162, 255, .07), transparent 60%),
        var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    line-height: 1.5;
}

.wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 28px 18px 60px
}

header {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 26px
}

.logo {
    font-size: 1.9rem;
    font-weight: 800;
    letter-spacing: -.5px
}

.logo .g {
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent
}

.tagline {
    color: var(--muted);
    font-size: .95rem
}

.card {
    background: linear-gradient(180deg, var(--panel), var(--panel2));
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
}

.card+.card,
section+section {
    margin-top: 18px
}

.card h2 {
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .14em;
    color: var(--muted);
    margin-bottom: 14px;
    font-weight: 700
}

/* ---------- controles ---------- */
.ctl-label {
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .14em;
    color: var(--muted);
    font-weight: 700;
    margin-bottom: 8px
}

.root-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 6px;
    margin-bottom: 16px
}

.root-btn {
    appearance: none;
    border: 1px solid var(--line);
    background: #161c2c;
    color: var(--text);
    border-radius: 10px;
    padding: 9px 0;
    font-size: .95rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform .08s ease, background .15s ease, border-color .15s ease;
}

.root-btn small {
    display: block;
    font-size: .58rem;
    font-weight: 600;
    color: var(--muted);
    letter-spacing: .02em
}

.root-btn:hover {
    transform: translateY(-1px);
    border-color: #33405e
}

.root-btn.on {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #1a1206;
    border-color: transparent
}

.root-btn.on small {
    color: rgba(26, 18, 6, .7)
}

.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 7px
}

.chip {
    appearance: none;
    border: 1px solid var(--line);
    background: #161c2c;
    color: var(--muted);
    border-radius: 999px;
    padding: 7px 13px;
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .15s ease;
}

.chip:hover {
    color: var(--text);
    border-color: #33405e
}

.chip.on {
    background: rgba(255, 180, 84, .14);
    border-color: rgba(255, 180, 84, .55);
    color: var(--accent)
}

#qualChips {
    margin-bottom: 16px
}

.capo-note {
    margin-top: 8px;
    font-size: .85rem;
    color: var(--accent);
    background: rgba(255, 180, 84, .09);
    border: 1px solid rgba(255, 180, 84, .3);
    border-radius: 10px;
    padding: 7px 11px;
    display: none;
    animation: pop .4s ease;
}

.capo-note.show {
    display: inline-block
}

/* ---------- grid principal ---------- */
.grid2 {
    display: grid;
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
    gap: 18px;
    align-items: stretch
}

.grid2>.card {
    margin-top: 0
}

@media(max-width:820px) {
    .grid2 {
        grid-template-columns: 1fr
    }

    .root-grid {
        grid-template-columns: repeat(6, 1fr)
    }

    .play-row {
        display: none;
    }
}

/* ---------- anatomia ---------- */
.chord-name {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1;
    animation: pop .35s ease
}

.chord-name .sfx {
    font-size: 1.8rem;
    color: var(--accent)
}

.chord-full {
    color: var(--muted);
    font-size: 1.05rem;
    margin-top: 2px;
    animation: pop .45s ease
}

@keyframes pop {
    from {
        opacity: 0;
        transform: translateY(6px)
    }

    to {
        opacity: 1;
        transform: none
    }
}

.formula {
    margin-top: 10px;
    font-size: .82rem;
    color: var(--muted)
}

.formula b {
    color: var(--text);
    font-weight: 700;
    letter-spacing: .06em
}

.note-rows {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px
}

.note-row {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #10151f;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 9px 12px;
    animation: pop .4s ease both;
}

.note-row .dot {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: .95rem;
    color: #101010;
    flex: none;
}

.note-row .nm {
    font-weight: 700
}

.note-row .pt {
    color: var(--muted);
    font-size: .82rem
}

.note-row .iv {
    margin-left: auto;
    font-size: .78rem;
    color: var(--muted);
    text-align: right
}

.note-row .iv b {
    display: block;
    color: var(--text);
    font-size: .85rem
}

.play-row {
    display: flex;
    gap: 10px;
    margin-top: 18px;
    flex-wrap: wrap
}

.play-btn {
    appearance: none;
    border: none;
    cursor: pointer;
    border-radius: 12px;
    padding: 11px 18px;
    font-size: .9rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform .08s ease, filter .15s ease;
}

.play-btn:active {
    transform: scale(.97)
}

.play-btn.primary {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #1a1206
}

.play-btn.ghost {
    background: #161c2c;
    color: var(--text);
    border: 1px solid var(--line)
}

.play-btn.ghost:hover {
    border-color: #33405e
}

/* ---------- diagrama ---------- */
.pos-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 10px;
    flex-wrap: wrap
}

.pos-tab {
    appearance: none;
    border: 1px solid var(--line);
    background: #161c2c;
    color: var(--muted);
    border-radius: 9px;
    padding: 6px 12px;
    font-size: .78rem;
    font-weight: 700;
    cursor: pointer;
}

.pos-tab.on {
    background: rgba(90, 162, 255, .14);
    border-color: rgba(90, 162, 255, .55);
    color: var(--fifth)
}

.diagram-holder {
    display: flex;
    justify-content: center
}

.diagram-holder svg {
    width: 100%;
    max-width: 280px;
    height: auto
}

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

/* ---------- braço ---------- */
.fb-scroll {
    overflow-x: auto;
    padding-bottom: 6px
}

.fb-scroll svg {
    min-width: 760px;
    width: 100%;
    height: auto;
    display: block
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 14px;
    font-size: .8rem;
    color: var(--muted)
}

.legend span {
    display: flex;
    align-items: center;
    gap: 6px
}

.legend i {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block
}

/* ---------- conteúdo / FAQ ---------- */
.about p {
    color: var(--muted);
    font-size: .92rem
}

.about p+p {
    margin-top: 10px
}

.about strong {
    color: var(--text)
}

.faq {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px
}

.faq details {
    background: #10151f;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0
}

.faq summary {
    cursor: pointer;
    list-style: none;
    padding: 12px 14px;
    font-weight: 700;
    font-size: .92rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.faq summary::before {
    content: '▸';
    color: var(--accent);
    transition: transform .15s ease
}

.faq details[open] summary::before {
    transform: rotate(90deg)
}

.faq details p {
    padding: 0 14px 13px 34px;
    color: var(--muted);
    font-size: .9rem
}

footer {
    margin-top: 36px;
    color: var(--muted);
    font-size: .78rem;
    text-align: center
}

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