:root {
    --bg:        #08040f;
    --bg-2:      #120a20;
    --ink:       #f3f0ff;
    --muted:     #9a92c4;
    --magenta:   #ff2e88;
    --violet:    #8b5cf6;
    --cyan:      #22d3ee;
    --amber:     #ffb03d;
    --ok:        #38e08a;
    --err:       #ff5a6a;
    --glass:     rgba(24, 16, 42, 0.55);
    --border:    rgba(255, 255, 255, 0.09);
    --font-ui:   "Rajdhani", system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-disp: "Orbitron", var(--font-ui);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    color: var(--ink);
    overflow: hidden;
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased;
}

#app, .screen { position: absolute; inset: 0; }
/* O atributo hidden tem de vencer sempre os seletores de ID abaixo. */
[hidden] { display: none !important; }

/* ============================================================
   BOOT
   ============================================================ */
#boot {
    display: grid; place-items: center;
    background:
        radial-gradient(900px 600px at 50% 20%, #1c0f36 0%, var(--bg) 65%);
}
.boot-inner { display: grid; place-items: center; gap: 22px; }
.boot-logo {
    font-family: var(--font-disp); font-weight: 900; font-size: 26px;
    letter-spacing: 4px; color: var(--ink); opacity: 0.9;
}
.boot-logo span { color: var(--magenta); }
.spinner {
    width: 40px; height: 40px; border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.08);
    border-top-color: var(--magenta);
    border-right-color: var(--violet);
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   AUTH — palco néon
   ============================================================ */
#auth-screen {
    display: grid; place-items: center; padding: 24px;
    background:
        radial-gradient(1200px 700px at 50% -15%, #23103f 0%, transparent 60%),
        radial-gradient(900px 900px at 85% 110%, #1a0a2e 0%, transparent 55%),
        var(--bg);
    overflow: hidden;
}

/* Blobs de aurora que flutuam devagar. */
.bg-aura { position: absolute; inset: -20%; z-index: 0; filter: blur(70px); opacity: 0.55; }
.blob { position: absolute; width: 46vmax; height: 46vmax; border-radius: 50%; mix-blend-mode: screen; }
.blob-a { background: radial-gradient(circle, var(--magenta), transparent 60%);
          top: -12%; left: -8%; animation: drift-a 18s ease-in-out infinite; }
.blob-b { background: radial-gradient(circle, var(--violet), transparent 60%);
          bottom: -18%; right: -6%; animation: drift-b 22s ease-in-out infinite; }
.blob-c { background: radial-gradient(circle, var(--cyan), transparent 62%);
          top: 30%; right: 20%; width: 32vmax; height: 32vmax;
          animation: drift-c 26s ease-in-out infinite; opacity: 0.7; }
@keyframes drift-a { 0%,100% { transform: translate(0,0) scale(1); }
                     50% { transform: translate(6vw, 4vh) scale(1.12); } }
@keyframes drift-b { 0%,100% { transform: translate(0,0) scale(1.05); }
                     50% { transform: translate(-5vw, -3vh) scale(0.95); } }
@keyframes drift-c { 0%,100% { transform: translate(0,0); }
                     50% { transform: translate(-4vw, 5vh); } }

/* Grelha em perspetiva (chão de palco). */
.bg-grid {
    position: absolute; inset: 0; z-index: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 46, 136, 0.12) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139, 92, 246, 0.12) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: linear-gradient(to top, #000 0%, transparent 42%);
    -webkit-mask-image: linear-gradient(to top, #000 0%, transparent 42%);
    transform: perspective(400px) rotateX(62deg) scale(2.4);
    transform-origin: bottom;
    animation: grid-scroll 4s linear infinite;
}
@keyframes grid-scroll { to { background-position: 0 46px, 0 0; } }

/* Equalizador na base. */
.bg-eq {
    position: absolute; left: 0; right: 0; bottom: 0; z-index: 0; height: 30vh;
    display: flex; align-items: flex-end; gap: 2px; padding: 0 2px;
    opacity: 0.35; pointer-events: none;
    mask-image: linear-gradient(to top, #000, transparent);
    -webkit-mask-image: linear-gradient(to top, #000, transparent);
}
.bg-eq span {
    flex: 1; border-radius: 3px 3px 0 0;
    background: linear-gradient(to top, var(--magenta), var(--violet));
    animation: eq 1.1s ease-in-out infinite;
    transform-origin: bottom;
}
.bg-eq span:nth-child(3n)   { animation-duration: 0.7s;  background: linear-gradient(to top, var(--cyan), var(--violet)); }
.bg-eq span:nth-child(3n+1) { animation-duration: 1.4s; }
.bg-eq span:nth-child(4n)   { animation-duration: 0.9s;  background: linear-gradient(to top, var(--amber), var(--magenta)); }
.bg-eq span:nth-child(5n)   { animation-delay: -0.4s; }
.bg-eq span:nth-child(7n)   { animation-delay: -0.7s; }
@keyframes eq { 0%,100% { height: 8%; } 50% { height: 70%; } }

/* Painel de vidro com moldura néon. */
.panel {
    position: relative; z-index: 1;
    width: min(400px, 100%);
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 34px 30px 26px;
    backdrop-filter: blur(18px) saturate(1.3);
    -webkit-backdrop-filter: blur(18px) saturate(1.3);
    box-shadow:
        0 40px 90px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    animation: panel-in 0.5s cubic-bezier(0.2, 0.9, 0.25, 1);
}
/* Halo em gradiente à volta do painel. */
.panel::before {
    content: ""; position: absolute; inset: -1.5px; z-index: -1; border-radius: 23px;
    background: linear-gradient(135deg, var(--magenta), var(--violet) 45%, var(--cyan));
    opacity: 0.55; filter: blur(9px);
}
@keyframes panel-in { from { opacity: 0; transform: translateY(14px) scale(0.98); }
                      to   { opacity: 1; transform: none; } }

.logo-wrap { display: flex; align-items: center; justify-content: center; gap: 12px; }
.pick { font-size: 30px; filter: drop-shadow(0 0 10px rgba(255, 46, 136, 0.7));
        animation: sway 3s ease-in-out infinite; }
@keyframes sway { 0%,100% { transform: rotate(-12deg); } 50% { transform: rotate(8deg); } }
.logo {
    margin: 0; font-family: var(--font-disp); font-weight: 900; font-size: 34px;
    letter-spacing: 2px; line-height: 1;
    background: linear-gradient(180deg, #fff 0%, #ffd9ec 60%, var(--magenta) 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
    filter: drop-shadow(0 0 18px rgba(255, 46, 136, 0.45));
}
.logo span { -webkit-text-fill-color: transparent;
             background: linear-gradient(180deg, #dcd2ff, var(--violet));
             -webkit-background-clip: text; background-clip: text; }
.tagline { text-align: center; color: var(--muted); margin: 8px 0 24px;
           font-size: 15px; letter-spacing: 0.3px; }

/* Tabs com slider deslizante. */
.tabs {
    position: relative; display: flex; background: rgba(0, 0, 0, 0.35);
    padding: 5px; border-radius: 14px; margin-bottom: 22px;
    border: 1px solid var(--border);
}
.tab-slider {
    position: absolute; top: 5px; left: 5px; bottom: 5px; width: calc(50% - 5px);
    border-radius: 10px; z-index: 0;
    background: linear-gradient(135deg, var(--magenta), var(--violet));
    box-shadow: 0 6px 18px rgba(255, 46, 136, 0.4);
    transition: transform 0.28s cubic-bezier(0.3, 0.9, 0.25, 1);
}
.tabs[data-mode="register"] .tab-slider { transform: translateX(100%); }
.tab {
    position: relative; z-index: 1; flex: 1; padding: 11px; border: 0;
    background: transparent; color: var(--muted); cursor: pointer;
    font-family: var(--font-ui); font-weight: 700; font-size: 15px;
    letter-spacing: 0.5px; transition: color 0.2s;
}
.tab.is-active { color: #fff; }

.field { display: block; margin-bottom: 15px; }
.field span { display: block; font-size: 12px; text-transform: uppercase;
              letter-spacing: 1.2px; color: var(--muted); margin-bottom: 7px; font-weight: 600; }
.field input {
    width: 100%; padding: 13px 15px; font-size: 16px; font-family: var(--font-ui);
    font-weight: 600; letter-spacing: 0.5px;
    background: rgba(0, 0, 0, 0.35); border: 1px solid var(--border);
    border-radius: 12px; color: var(--ink); outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.field input::placeholder { color: rgba(154, 146, 196, 0.5); font-weight: 500; }
.field input:focus {
    border-color: var(--cyan); background: rgba(0, 0, 0, 0.5);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.18);
}

.form-error {
    color: var(--err); font-size: 13px; min-height: 18px; margin: 2px 0 10px;
    font-weight: 600; text-align: center;
}

.btn-primary {
    position: relative; width: 100%; padding: 0; height: 52px; border: 0;
    border-radius: 13px; cursor: pointer; overflow: hidden;
    background: linear-gradient(135deg, var(--magenta) 0%, var(--violet) 55%, var(--cyan) 130%);
    color: #fff; font-family: var(--font-disp); font-weight: 800; font-size: 15px;
    letter-spacing: 2px; text-transform: uppercase;
    box-shadow: 0 12px 30px rgba(255, 46, 136, 0.4);
    transition: transform 0.12s, box-shadow 0.2s, filter 0.2s;
}
.btn-primary span { position: relative; z-index: 1; }
/* Brilho que atravessa o botão. */
.btn-primary::after {
    content: ""; position: absolute; top: 0; left: -60%; width: 40%; height: 100%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.45), transparent);
    transform: skewX(-20deg); animation: sheen 3.2s ease-in-out infinite;
}
@keyframes sheen { 0%, 60% { left: -60%; } 85%, 100% { left: 130%; } }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(255, 46, 136, 0.55); filter: brightness(1.08); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.7; cursor: wait; filter: saturate(0.6); }

.fineprint { text-align: center; color: rgba(154, 146, 196, 0.6);
             font-size: 12px; margin: 18px 0 0; letter-spacing: 0.5px; }

/* ============================================================
   GAME
   ============================================================ */
.topbar {
    position: absolute; top: 0; left: 0; right: 0; z-index: 2;
    display: flex; align-items: center; gap: 14px; padding: 14px 20px;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent);
}
.brand { font-family: var(--font-disp); font-weight: 800; font-size: 18px;
         letter-spacing: 2px; }
.brand span { color: var(--magenta); }
.spacer { flex: 1; }
.who { color: var(--muted); font-size: 14px; font-weight: 600; letter-spacing: 0.5px; }
.btn-ghost {
    background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border);
    color: var(--ink); padding: 8px 16px; border-radius: 10px; cursor: pointer;
    font-family: var(--font-ui); font-weight: 600; font-size: 13px;
    letter-spacing: 0.5px; transition: all 0.18s;
}
.btn-ghost:hover { border-color: var(--magenta); background: rgba(255, 46, 136, 0.12); }

#stage { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

.fps {
    position: absolute; bottom: 14px; right: 16px; z-index: 2;
    font-family: var(--font-disp); font-variant-numeric: tabular-nums;
    font-size: 12px; letter-spacing: 1px; color: var(--cyan);
    background: rgba(0, 0, 0, 0.45); border: 1px solid rgba(34, 211, 238, 0.25);
    padding: 5px 10px; border-radius: 8px;
}

/* ---- HUD ao vivo ---- */
.gp-hud {
    position: absolute; top: 62px; left: 20px; z-index: 2;
    display: flex; flex-direction: column; gap: 6px;
    font-family: var(--font-ui); pointer-events: none;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
}
.gp-hud .hud-score b, .gp-hud .hud-acc b {
    font-family: var(--font-disp); font-weight: 800; font-size: 30px;
    line-height: 1; letter-spacing: 1px; color: #fff;
    font-variant-numeric: tabular-nums;
}
.gp-hud .hud-acc b { font-size: 20px; color: var(--cyan); }
.gp-hud small { display: block; font-size: 10px; text-transform: uppercase;
                letter-spacing: 1.5px; color: var(--muted); margin-top: 2px; }
.hud-tally { display: flex; flex-direction: column; gap: 2px; margin-top: 6px;
             font-size: 13px; font-weight: 600; color: var(--muted); }
.hud-tally b { color: #fff; font-variant-numeric: tabular-nums; margin-left: 4px; }
.t-perfect b { color: var(--cyan); } .t-good b { color: var(--ok); }
.t-okay b { color: var(--amber); } .t-miss b { color: var(--err); }
.hud-error { font-size: 13px; font-weight: 600; color: var(--muted); margin-top: 4px; }
.hud-error b { font-variant-numeric: tabular-nums; }

/* ---- Overlays do jogo ---- */
.gp-overlay {
    position: absolute; inset: 0; z-index: 5; display: grid; place-items: center;
    padding: 24px; background: rgba(8, 4, 15, 0.72); backdrop-filter: blur(6px);
    animation: fade-in 0.25s ease;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.gp-card {
    width: min(440px, 100%); text-align: center;
    background: var(--glass); border: 1px solid var(--border); border-radius: 20px;
    padding: 32px 30px; backdrop-filter: blur(14px);
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55);
    animation: panel-in 0.4s cubic-bezier(0.2, 0.9, 0.25, 1);
}
.gp-card h2 { font-family: var(--font-disp); font-weight: 800; font-size: 24px;
              margin: 0 0 6px; letter-spacing: 1px; }
.gp-sub { color: var(--muted); margin: 0 0 20px; }
.keycaps { display: flex; justify-content: center; gap: 10px; margin: 8px 0 16px; }
.kc {
    width: 46px; height: 46px; display: grid; place-items: center;
    font-family: var(--font-disp); font-weight: 800; font-size: 18px; color: #fff;
    border-radius: 12px; border: 2px solid var(--c);
    background: color-mix(in srgb, var(--c) 22%, transparent);
    box-shadow: 0 0 18px color-mix(in srgb, var(--c) 45%, transparent),
                inset 0 -3px 0 rgba(0, 0, 0, 0.3);
    animation: kc-bounce 1.4s ease-in-out infinite;
}
.kc:nth-child(2) { animation-delay: 0.1s; } .kc:nth-child(3) { animation-delay: 0.2s; }
.kc:nth-child(4) { animation-delay: 0.3s; } .kc:nth-child(5) { animation-delay: 0.4s; }
@keyframes kc-bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
.gp-hint { color: var(--muted); font-size: 13px; margin: 0 0 22px; }
.gp-hint kbd { background: rgba(255, 255, 255, 0.08); border: 1px solid var(--border);
               border-radius: 5px; padding: 1px 6px; font-size: 12px; font-family: var(--font-ui); }
.gp-card .btn-primary { max-width: 240px; margin: 0 auto; }

/* ---- Resultados ---- */
.r-stars { font-size: 40px; letter-spacing: 6px; color: var(--amber);
           margin: 4px 0 20px; text-shadow: 0 0 24px rgba(255, 176, 61, 0.6); }
.r-stars.fc { color: #ffe27a; animation: star-glow 1.2s ease-in-out infinite; }
@keyframes star-glow { 0%, 100% { text-shadow: 0 0 20px rgba(255, 210, 63, 0.6); }
                       50% { text-shadow: 0 0 40px rgba(255, 210, 63, 1); } }
.r-grid { display: flex; justify-content: center; gap: 26px; margin-bottom: 18px; }
.r-big b { display: block; font-family: var(--font-disp); font-weight: 800;
           font-size: 26px; color: #fff; font-variant-numeric: tabular-nums; }
.r-big small { font-size: 10px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--muted); }
.r-tally { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap;
           font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 24px; }
.r-tally b { margin-left: 4px; }

/* ---- Prática + botões extra ---- */
.practice { display: block; text-align: left; margin: 4px 0 18px;
            font-size: 13px; color: var(--muted); }
.practice span { display: block; margin-bottom: 8px; }
.practice b { color: var(--cyan); font-weight: 700; }
.practice input[type=range] { width: 100%; accent-color: var(--magenta); cursor: pointer; }
.btn-wide { width: 100%; margin-top: 10px; }

/* ---- Wizard de calibração ---- */
.cal-pad {
    width: 120px; height: 120px; border-radius: 50%; margin: 6px auto 14px;
    border: 3px solid var(--border); background: rgba(0, 0, 0, 0.35);
    transition: background 0.05s, box-shadow 0.05s, transform 0.05s, border-color 0.05s;
}
.cal-pad.lit {
    background: radial-gradient(circle, var(--cyan), #0a6b7a);
    border-color: var(--cyan);
    box-shadow: 0 0 40px var(--cyan);
}
.cal-pad.tap { transform: scale(0.9); border-color: var(--magenta);
               box-shadow: 0 0 30px var(--magenta); }
.cal-progress { font-family: var(--font-disp); font-size: 15px; letter-spacing: 1px;
                color: var(--ink); margin: 0 0 14px; }
.cal-measured { font-size: 15px; color: var(--muted); margin: 4px 0 18px; }
.cal-measured b { color: var(--ink); font-variant-numeric: tabular-nums; }
.cal-btns { display: flex; gap: 10px; justify-content: center; margin-bottom: 14px; }
.cal-btns .btn-ghost { flex: 1; }
#cal-modal .btn-primary { max-width: 240px; margin: 0 auto; }

@media (max-width: 420px) {
    .panel { padding: 28px 22px 22px; }
    .logo { font-size: 28px; }
}