/* ============================================================
   DESTELLOS DE JÚPITER — styles.css rediseñado
   Tokens sincronizados con shared.css de Claude Design
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,wght@0,400;0,500;1,400;1,500&family=Inter:wght@400;500;600&display=swap');

:root {
    /* ── Tokens de CD (shared.css) ── */
    --ink-900: #2B2546; --ink-800: #342E55; --ink-700: #4A4370;
    --ink-500: #6E6894; --ink-400: #8E89AE; --ink-300: #B8B3D0;
    --ink-200: #E5E1F0; --ink-100: #F2EFF8;

    --brand-pink:       #E9A7C9;
    --brand-magenta:    #C88BC4;
    --brand-lilac:      #B69BD8;
    --brand-lavender:   #9FA6E0;
    --brand-periwinkle: #8FB4E8;
    --accent-yellow:    #F4D06F;
    --accent-coral:     #FFB4A2;

    --gradient-cta:  linear-gradient(100deg, var(--brand-pink) 0%, var(--brand-magenta) 40%, var(--brand-lavender) 100%);
    --gradient-text: linear-gradient(90deg, var(--brand-pink) 0%, var(--brand-lilac) 50%, var(--brand-periwinkle) 100%);

    --font-display: 'Fraunces', 'Playfair Display', Georgia, serif;
    --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --r-sm: 8px; --r-md: 14px; --r-lg: 20px; --r-xl: 28px; --r-2xl: 36px; --r-pill: 999px;

    --shadow-glow-cta:  0 12px 32px rgba(201,139,196,.45);
    --shadow-glow-pink: 0 10px 30px rgba(232,128,184,.35);

    /* ── Legacy aliases (no romper lógica existente) ── */
    --bg-cosmic:       #2B2546;
    --bg-deep:         #1e1a38;
    --primary-color:   #B69BD8;
    --secondary-color: #E9A7C9;
    --text-primary:    #ffffff;
    --text-secondary:  #B8B3D0;
    --card-bg:         rgba(255,255,255,0.07);
    --border-radius:   20px;
    --shadow-soft:     0 8px 32px rgba(0,0,0,0.3);
    --pink:    #E9A7C9;
    --lila:    #B69BD8;
    --celeste: #8FB4E8;
    --dark-bg: #1e1a38;
    --glass:         rgba(255,255,255,0.08);
    --glass-border:  rgba(255,255,255,0.12);
    --text:   #ffffff;
    --shadow: 0 8px 32px 0 rgba(0,0,0,0.37);
    --grad-cta:  linear-gradient(100deg, #E9A7C9 0%, #C88BC4 40%, #9FA6E0 100%);
    --grad-soft: linear-gradient(135deg, #F5D9E8 0%, #E4CEEC 35%, #D4CFEF 65%, #C9D5F0 100%);
}

/* ── Animaciones globales ── */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes twinkle {
    0%, 100% { opacity: 0;  transform: scale(.7); }
    50%       { opacity: .9; transform: scale(1); }
}

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

body {
    font-family: var(--font-body);
    background-color: #0d0a18;
    background-image:
        radial-gradient(ellipse 80% 50% at 18%  8%,  rgba(233,167,201,0.22) 0%, transparent 60%),
        radial-gradient(ellipse 70% 50% at 88%  22%, rgba(143,180,232,0.20) 0%, transparent 60%),
        radial-gradient(ellipse 90% 60% at 50%  78%, rgba(182,155,216,0.22) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 12%  95%, rgba(244,208,111,0.10) 0%, transparent 60%),
        linear-gradient(180deg, #2B2546 0%, #3a2a55 50%, #2B2546 100%);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    min-height: 100vh;
    padding: 0;
}

/* ──────────────────────────────────────
   NAVBAR
────────────────────────────────────── */
.dj-navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px 12px;
    background: linear-gradient(180deg, rgba(43,37,70,.92) 0%, rgba(43,37,70,.72) 70%, rgba(43,37,70,0) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.dj-nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}
.dj-logo-mark {
    width: 36px; height: 36px;
    border-radius: var(--r-pill);
    background: var(--gradient-cta);
    display: grid; place-items: center;
    box-shadow: 0 6px 18px rgba(201,139,196,.45);
    flex-shrink: 0;
}
.dj-logo-mark svg { width: 18px; height: 18px; }
.dj-nav-eyebrow {
    font-size: 9.5px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--ink-300);
    margin-bottom: 3px;
    font-family: var(--font-body);
}
.dj-nav-app {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 500;
    color: #fff;
    letter-spacing: -0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.dj-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: var(--r-pill);
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.12);
    color: var(--ink-200);
    font-size: 11.5px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all .2s ease;
    flex-shrink: 0;
    font-family: var(--font-body);
}
.dj-back-btn:hover {
    background: rgba(255,255,255,.10);
    border-color: rgba(255,255,255,.20);
}

/* Saludo */
.dj-greet {
    padding: 6px 22px 0;
    font-size: 13px;
    color: var(--ink-300);
    display: flex;
    align-items: center;
    gap: 6px;
}
.dj-greet strong { color: #fff; font-weight: 500; margin: 0 4px; }
.dj-sparkle { color: var(--accent-yellow); }

/* Estrellas decorativas */
.dj-stars {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}
.dj-star {
    position: absolute;
    color: #fff;
    font-size: 14px;
    line-height: 1;
    opacity: 0;
    animation: twinkle 4s ease-in-out infinite;
    text-shadow: 0 0 8px rgba(255,255,255,.6), 0 0 18px rgba(232,167,201,.4);
    user-select: none;
}
.dj-star.s-pink  { color: #F5D9E8; }
.dj-star.s-sky   { color: #C9D5F0; }
.dj-star.s-honey { color: #FAE9B8; }

/* ──────────────────────────────────────
   SELECTOR UI
────────────────────────────────────── */
.selector-container {
    width: 100%;
    max-width: 480px;
    padding: 0 22px 40px;
    position: relative;
    z-index: 1;
}

.selector-screen {
    display: flex;
    flex-direction: column;
    gap: 0;
    animation: fadeIn 0.4s ease-out;
}

/* ── Header de cada pantalla ── */
.header-cosmic {
    padding: 22px 0 6px;
}
.header-cosmic h1 {
    font-family: var(--font-display);
    font-size: clamp(34px, 9.5vw, 44px);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: #fff;
    margin-bottom: 8px;
}
.header-cosmic h1 em,
.header-cosmic h2 em {
    font-style: italic;
    font-weight: 400;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.header-cosmic h2 {
    font-family: var(--font-display);
    font-size: clamp(34px, 9.5vw, 44px);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: #fff;
    margin-bottom: 8px;
}
.header-cosmic p {
    font-size: 14.5px;
    line-height: 1.55;
    color: var(--ink-300);
    margin-bottom: 6px;
    max-width: 38ch;
}

/* Eyebrow label */
.dj-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 10.5px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--ink-300);
    margin-bottom: 14px;
    font-family: var(--font-body);
}
.dj-eyebrow::before {
    content: "";
    width: 22px; height: 1px;
    background: linear-gradient(90deg, transparent, var(--brand-lilac));
}

/* Section label */
.dj-section-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 10.5px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--ink-400);
    margin: 18px 0 10px;
    font-family: var(--font-body);
}
.dj-section-label::after {
    content: "";
    flex: 1; height: 1px;
    background: linear-gradient(90deg, var(--ink-700), transparent);
}

/* Botón volver */
.btn-back {
    background: transparent;
    border: none;
    color: var(--brand-lilac);
    font-family: var(--font-body);
    font-size: 12px;
    letter-spacing: .12em;
    text-transform: uppercase;
    cursor: pointer;
    padding: 6px 0;
    align-self: flex-start;
    margin-bottom: 8px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color .2s, transform .2s;
    opacity: 1;
}
.btn-back:hover {
    color: var(--brand-pink);
    transform: translateX(-3px);
}

/* ── Breadcrumb ── */
.dj-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--ink-400);
    margin-bottom: 6px;
    font-family: var(--font-body);
    letter-spacing: .04em;
}
.dj-breadcrumb span { color: var(--ink-300); }
.dj-breadcrumb .current { color: #fff; font-weight: 500; }
.dj-breadcrumb .sep { color: var(--ink-600); }

/* ── Step indicator ── */
.dj-step {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 10.5px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--ink-400);
    margin-bottom: 10px;
    font-family: var(--font-body);
}
.dj-step::before {
    content: "";
    width: 22px; height: 1px;
    background: var(--brand-lilac);
}

/* ──────────────────────────────────────
   CARDS DE SELECCIÓN — diseño rico CD
────────────────────────────────────── */
.selector-options {
    display: grid;
    gap: 12px;
    margin-top: 14px;
}

.selector-card {
    position: relative;
    display: grid;
    grid-template-columns: 64px 1fr 28px;
    align-items: center;
    gap: 16px;
    padding: 16px 18px;
    border-radius: var(--r-xl);
    background: linear-gradient(140deg, rgba(255,255,255,0.07) 0%, rgba(255,255,255,0.02) 60%);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 10px 30px rgba(13,10,24,.35);
    color: var(--text-primary);
    font-family: var(--font-body);
    cursor: pointer;
    transition: transform .3s cubic-bezier(.22,.61,.36,1), border-color .3s ease, box-shadow .3s ease;
    backdrop-filter: blur(8px);
    text-align: left;
}
.selector-card:hover {
    transform: translateY(-2px);
    border-color: rgba(255,255,255,0.18);
    box-shadow: 0 16px 38px rgba(13,10,24,.5);
}
.selector-card.selected {
    border-color: var(--brand-lilac);
    box-shadow: 0 0 0 1px var(--brand-lilac), 0 16px 38px rgba(13,10,24,.5);
}

/* Ícono en cuadrado redondeado con color — igual que CD */
.card-icon {
    width: 56px; height: 56px;
    border-radius: var(--r-md);
    display: grid; place-items: center;
    font-size: 28px;
    line-height: 1;
    flex-shrink: 0;
    /* Color por defecto, se sobreescribe por clase */
    background: rgba(182,155,216,0.25);
    border: 1px solid rgba(255,255,255,.10);
}
/* Variantes de color del ícono según tipo */
.card-icon.icon-pink    { background: linear-gradient(135deg, rgba(233,167,201,.35), rgba(200,139,196,.25)); }
.card-icon.icon-blue    { background: linear-gradient(135deg, rgba(143,180,232,.35), rgba(159,166,224,.25)); }
.card-icon.icon-yellow  { background: linear-gradient(135deg, rgba(244,208,111,.35), rgba(255,180,162,.25)); }
.card-icon.icon-lilac   { background: linear-gradient(135deg, rgba(182,155,216,.35), rgba(159,166,224,.25)); }
.card-icon.icon-teal    { background: linear-gradient(135deg, rgba(143,200,200,.35), rgba(143,180,232,.25)); }

/* Número de orden en la esquina */
.card-number {
    position: absolute;
    top: 14px; right: 50px;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: .1em;
    color: var(--ink-400);
    font-family: var(--font-body);
}

/* Contenido de texto */
.card-body {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}
.card-title {
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 500;
    color: #fff;
    line-height: 1.1;
    letter-spacing: -0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.card-desc {
    font-size: 12.5px;
    line-height: 1.4;
    color: var(--ink-300);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Flecha → */
.card-arrow {
    width: 28px; height: 28px;
    border-radius: var(--r-pill);
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.10);
    display: grid; place-items: center;
    color: var(--ink-200);
    flex-shrink: 0;
    font-size: 13px;
    transition: transform .25s ease, background .25s ease;
}
.selector-card:hover .card-arrow {
    transform: translateX(3px);
    background: rgba(255,255,255,.12);
}

/* ── Pantalla de bienvenida ── */
#screen-welcome {
    padding-top: 8px;
}
.welcome-hero {
    padding: 16px 0 20px;
}
.welcome-hero .dj-eyebrow {
    margin-bottom: 12px;
}
.welcome-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(34px, 9.5vw, 44px);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: #fff;
    margin-bottom: 12px;
}
.welcome-hero h1 em {
    font-style: italic;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.welcome-hero p {
    font-size: 14.5px;
    line-height: 1.55;
    color: var(--ink-300);
    max-width: 38ch;
    margin-bottom: 0;
}
.welcome-cta {
    width: 100%;
    margin-top: 24px;
    padding: 17px 24px;
    border-radius: var(--r-pill);
    background: var(--gradient-cta);
    border: none;
    color: #fff;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-glow-cta);
    transition: transform .25s ease, box-shadow .25s ease, filter .25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    letter-spacing: .02em;
}
.welcome-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(201,139,196,.55);
    filter: brightness(1.05);
}
.welcome-foot {
    margin-top: 12px;
    text-align: center;
    font-size: 10.5px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.55);
    font-family: var(--font-body);
}

/* ── Partículas sutiles solo en la pantalla de bienvenida ── */
#screen-welcome {
    position: relative;
    isolation: isolate;
}
.welcome-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: -1;
}
.wp {
    position: absolute;
    left: var(--x);
    top: var(--y);
    width: var(--s, 3px);
    height: var(--s, 3px);
    border-radius: 50%;
    background: rgba(255,255,255,0.92);
    box-shadow: 0 0 6px rgba(255,255,255,.6), 0 0 14px rgba(233,167,201,.35);
    opacity: 0;
    animation: wp-float var(--d, 7s) ease-in-out var(--delay, 0s) infinite;
}
@keyframes wp-float {
    0%, 100% { opacity: 0; transform: translate3d(0, 8px, 0); }
    50%      { opacity: var(--g, .55); transform: translate3d(0, -10px, 0); }
}

/* ── Cards de dificultad: número grande + descripción ── */
.diff-number {
    width: 56px; height: 56px;
    border-radius: 50%;
    display: grid; place-items: center;
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 400;
    color: #fff;
    flex-shrink: 0;
}
.diff-number.lvl-1 { background: linear-gradient(135deg, #F4D06F, #FFB4A2); }
.diff-number.lvl-2 { background: linear-gradient(135deg, #FFB4A2, #E9A7C9); }
.diff-number.lvl-3 { background: linear-gradient(135deg, #E9A7C9, #C88BC4); }
.diff-number.lvl-4 { background: linear-gradient(135deg, #C88BC4, #B69BD8); }
.diff-number.lvl-5 { background: linear-gradient(135deg, #B69BD8, #9FA6E0); }

/* ── Dots de dificultad ── */
.diff-dots {
    display: flex;
    gap: 3px;
    align-items: center;
    flex-shrink: 0;
}
.diff-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,.18);
}
.diff-dot.filled { background: var(--brand-lilac); }

/* ──────────────────────────────────────
   COMING SOON
────────────────────────────────────── */
.coming-soon-card {
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    border-radius: var(--r-xl);
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
}

/* ──────────────────────────────────────
   CONTENEDOR PRINCIPAL DEL JUEGO
   (sin cambios estéticos en lógica)
────────────────────────────────────── */
#app-container {
    width: 100%;
    max-width: 700px;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    position: relative;
    z-index: 1;
}

.screen {
    display: none;
    width: 100%;
    max-width: 800px;
    flex-direction: column;
    align-items: center;
    animation: fadeIn 0.5s ease forwards;
}
.screen.active { display: flex; }

.content-card {
    background: rgba(255,255,255,0.07);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4), inset 0 0 20px rgba(255,255,255,0.03);
    max-width: 540px;
    width: 100%;
}

.input-group {
    margin: 30px 0;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.input-group label {
    font-size: 1rem;
    color: var(--celeste);
    margin-left: 10px;
    font-weight: 400;
}
.input-group input {
    background: rgba(255,255,255,0.07);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 14px 20px;
    color: white;
    font-size: 1.1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}
.input-group input:focus {
    outline: none;
    border-color: var(--lila);
    background: rgba(255,255,255,0.10);
    box-shadow: 0 0 15px rgba(182,155,216,0.3);
}

.stats-bar {
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
    max-width: 640px;
    background: rgba(255,255,255,0.06);
    padding: 15px 10px;
    border-radius: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--glass-border);
}
.stat-item { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--celeste);
    opacity: 0.8;
}
.stat-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* ── Botones ── */
.btn-primary {
    background: var(--gradient-cta);
    color: white;
    border: none;
    padding: 16px 40px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-body);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: var(--shadow-glow-cta);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(201,139,196,.5);
    filter: brightness(1.05);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
    background: rgba(255,255,255,0.07);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 12px 24px;
    border-radius: 16px;
    font-size: 0.95rem;
    font-weight: 400;
    cursor: pointer;
    font-family: var(--font-body);
    transition: all 0.3s ease;
}
.btn-secondary:hover {
    background: rgba(255,255,255,0.12);
    transform: translateY(-2px);
}

/* ── Interfaz de juego (sin cambios) ── */
.game-header {
    width: 100%;
    max-width: 640px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    gap: 15px;
}
.game-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    color: white;
    letter-spacing: -0.01em;
}
.controls-top { display: flex; gap: 8px; }

.puzzle-main {
    width: 100%;
    display: flex;
    justify-content: center;
    perspective: 1000px;
    padding: 10px;
}

.board {
    display: grid;
    gap: 2px;
    width: 100%;
    max-width: 600px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 4px;
    margin: 0 auto;
}

.puzzle-piece {
    width: 100%;
    height: 100%;
    border-radius: 12px;
    cursor: pointer;
    touch-action: none;
    border: 1px solid rgba(255,255,255,0.15);
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.puzzle-piece:hover { transform: scale(1.02); z-index: 5; box-shadow: 0 8px 15px rgba(0,0,0,0.3); }
.puzzle-piece.dragging { opacity: 0.7; transform: scale(1.05) rotate(2deg); box-shadow: 0 20px 30px rgba(0,0,0,0.4); }
.puzzle-piece.correct { border: 2px solid var(--celeste); box-shadow: 0 0 15px var(--celeste); }

.game-footer { margin-top: 20px; }

.help-card { border: 1px solid var(--celeste); }
.help-card h2 { color: var(--celeste); margin-bottom: 15px; }
.help-card p { margin-bottom: 25px; font-size: 1.1rem; opacity: 0.9; }
.help-options { display: flex; flex-direction: column; gap: 12px; }

.overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(6px);
}
.overlay-content { position: relative; max-width: 90%; max-height: 90%; }
.guide-image { width: 100%; max-width: 600px; border-radius: 12px; box-shadow: 0 0 30px var(--celeste); }
.btn-close {
    position: absolute;
    top: -20px; right: -20px;
    width: 40px; height: 40px;
    background: var(--gradient-cta);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.hidden { display: none !important; }
.win-icon { font-size: 4rem; margin-bottom: 20px; }

/* ── Memotest (sin tocar flip) ── */
.memotest-board {
    display: grid;
    gap: 10px;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 10px;
}
.memotest-card {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    perspective: 1000px;
    cursor: pointer;
}
.memotest-card-inner {
    position: relative;
    width: 100%; height: 100%;
    transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
    box-shadow: var(--shadow-soft);
    border-radius: var(--border-radius);
}
.memotest-card.flipped .memotest-card-inner { transform: rotateY(180deg); }
.memotest-card.matched { opacity: 0.7; pointer-events: none; transform: scale(0.95); transition: all 0.3s ease; }
.memotest-card-front, .memotest-card-back {
    position: absolute;
    width: 100%; height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
}
.memotest-card-front {
    transform: rotateY(180deg);
    background-color: var(--card-bg);
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
.memotest-face-image { width: 100%; height: 100%; object-fit: cover; border-radius: inherit; display: block; }
.memotest-card-back {
    transform: rotateY(0deg);
    background: var(--gradient-cta);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 0 15px rgba(255,255,255,0.2), 0 0 10px rgba(182,155,216,0.4);
}
.memotest-card-back::after { content: '✦'; font-size: 2rem; opacity: 0.7; }

/* ── Sequence (sin tocar) ── */
.sequence-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 8px;
    width: 100%;
    max-width: 600px;
    aspect-ratio: 3/2;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 8px;
    margin: 0 auto;
}
@media (max-width: 600px) {
    .sequence-board {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 1fr);
        aspect-ratio: 2/3;
        gap: 4px;
        padding: 4px;
    }
}
.sequence-card {
    position: relative;
    width: 100%; height: 100%;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    border: 2px solid transparent;
    transition: all 0.2s ease-in-out;
}
.sequence-card.selected {
    border: 3px solid var(--secondary-color);
    transform: scale(0.95);
    box-shadow: 0 0 20px var(--secondary-color);
    z-index: 10;
}
.sequence-face-image { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ── Responsive ── */
@media (max-width: 600px) {
    .content-card { padding: 30px 20px; }
    .game-header { flex-direction: column; align-items: center; }
    .controls-top { width: 100%; justify-content: center; }
    .board { max-width: 100%; }
    .selector-container { padding: 0 16px 40px; }
}