/* ============================================
   LUMI ETA ABESBATZA MAGIKOA
   Design System - Escape Room Musical
   ============================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,800&family=Be+Vietnam+Pro:wght@400;500;600;700&display=swap');

/* --- Design Tokens (CSS Custom Properties) --- */
:root {
    /* Primary */
    --primary: #0061a6;
    --on-primary: #ffffff;
    --primary-container: #d2e4ff;
    --on-primary-container: #00497e;
    --primary-fixed: #d2e4ff;
    --primary-fixed-dim: #a0caff;

    /* Secondary */
    --secondary: #ac2a5d;
    --on-secondary: #ffffff;
    --secondary-container: #ffd9e1;
    --on-secondary-container: #8c0a46;
    --secondary-fixed: #ffd9e1;
    --secondary-fixed-dim: #ffb1c5;

    /* Tertiary */
    --tertiary: #705d00;
    --on-tertiary: #ffffff;
    --tertiary-container: #ffe16d;
    --on-tertiary-container: #544600;
    --tertiary-fixed: #ffe16d;
    --tertiary-fixed-dim: #e9c400;

    /* Error */
    --error: #ba1a1a;
    --on-error: #ffffff;
    --error-container: #ffdad6;
    --on-error-container: #93000a;

    /* Surface & Background */
    --background: #f8f9ff;
    --on-background: #191c20;
    --surface: #f8f9ff;
    --on-surface: #191c20;
    --on-surface-variant: #474747;
    --surface-variant: #e1e2e8;
    --surface-dim: #d8dae0;
    --surface-bright: #f8f9ff;
    --surface-container-lowest: #ffffff;
    --surface-container-low: #f2f3f9;
    --surface-container: #eceef3;
    --surface-container-high: #e7e8ee;
    --surface-container-highest: #e1e2e8;
    --surface-tint: #0061a6;

    /* Outline */
    --outline: #777777;
    --outline-variant: #c6c6c6;

    /* Inverse */
    --inverse-surface: #2e3135;
    --inverse-on-surface: #eff0f6;
    --inverse-primary: #a0caff;

    /* Roundedness */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 2rem;
    --radius-xl: 3rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-ambient: 0px 12px 32px rgba(25, 28, 32, 0.06);
    --shadow-lg: 0px 8px 24px rgba(25, 28, 32, 0.1);
    --shadow-xl: 0px 16px 48px rgba(25, 28, 32, 0.12);

    /* Success */
    --success: #16a34a;
    --success-container: #dcfce7;
}

/* --- Base Reset & Typography --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Be Vietnam Pro', system-ui, sans-serif;
    background: var(--background);
    color: var(--on-surface);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.font-headline {
    font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
}

.font-body {
    font-family: 'Be Vietnam Pro', system-ui, sans-serif;
}

/* --- Material Symbols --- */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
}

.material-symbols-outlined.filled {
    font-variation-settings: 'FILL' 1;
}

/* --- Header / Top Nav Bar --- */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: rgba(239, 246, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.top-nav__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.25rem;
    font-weight: 900;
    letter-spacing: -0.025em;
    color: var(--primary);
    font-style: italic;
}

.top-nav__actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.top-nav__btn {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    transition: transform 0.2s;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
}

.top-nav__btn:hover { transform: scale(1.1); }
.top-nav__btn:active { transform: scale(0.95); }

.locale-switcher {
    display: flex;
    gap: 0.25rem;
    background: var(--surface-container);
    border-radius: var(--radius-full);
    padding: 0.25rem;
}

.locale-switcher a {
    text-decoration: none;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-full);
    color: var(--on-surface-variant);
    transition: all 0.2s;
}

.locale-switcher a.active {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: 0 2px 6px rgba(0, 97, 166, 0.3);
}

/* --- Main Content Area --- */
.main-content {
    padding-top: 5rem;
    padding-bottom: 8rem;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    max-width: 72rem;
    margin: 0 auto;
    position: relative;
}

/* --- Screen Sections --- */
.screen {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    min-height: calc(100vh - 12rem);
}

.screen.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* --- Glass Panels --- */
.glass-panel {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

/* --- Progress Bar (Musical Staff) --- */
.progress-staff {
    width: 100%;
    margin-bottom: 2rem;
    position: relative;
    height: 4rem;
    background: var(--surface-container-low);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    padding: 0 2rem;
    border-bottom: 4px solid rgba(0, 97, 166, 0.1);
    overflow: hidden;
}

.progress-staff__lines {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: 0.5rem 1rem;
    pointer-events: none;
    opacity: 0.2;
}

.progress-staff__lines span {
    height: 1px;
    background: var(--on-surface);
    width: 100%;
}

.progress-staff__notes {
    position: relative;
    z-index: 10;
    display: flex;
    width: 100%;
    justify-content: space-between;
    align-items: center;
}

.progress-note {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.progress-note--empty {
    background: var(--surface-container-highest);
    border: 2px dashed var(--outline-variant);
}

.progress-note--empty .material-symbols-outlined {
    color: var(--outline-variant);
    opacity: 0.4;
}

.progress-note--filled {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: 0 4px 12px rgba(0, 97, 166, 0.3);
}

.progress-note--current {
    background: var(--tertiary-container);
    border: 3px solid var(--tertiary);
    color: var(--on-tertiary-container);
    box-shadow: 0 4px 12px rgba(112, 93, 0, 0.25);
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 4px 12px rgba(112, 93, 0, 0.25); }
    50% { box-shadow: 0 4px 20px rgba(112, 93, 0, 0.5); }
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    padding: 0 0.5rem;
}

.progress-info__keys {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.progress-info__level {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    color: var(--tertiary);
}

/* --- PANTALLA 1: INTRO --- */
.intro__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 800;
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--primary);
    text-align: center;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.intro__divider {
    height: 0.25rem;
    width: 8rem;
    background: var(--secondary);
    border-radius: var(--radius-full);
    margin: 0 auto 3rem;
}

.intro__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: start;
}

@media (min-width: 1024px) {
    .intro__grid {
        grid-template-columns: 7fr 5fr;
    }
}

.intro__video-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: var(--surface-container-highest);
    aspect-ratio: 16/9;
}

.intro__video-wrapper iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.intro__narrative {
    background: var(--surface-container-low);
    border-radius: var(--radius-lg);
    padding: 2rem;
    position: relative;
    overflow: visible;
}

.intro__narrative-content {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.intro__lumi-img {
    display: none;
    width: 10rem;
    flex-shrink: 0;
    margin: -2rem 0 0 -3rem;
    z-index: 10;
    filter: drop-shadow(0 8px 16px rgba(0,0,0,0.15));
    transition: transform 0.3s;
    border-radius: var(--radius-lg);
}

.intro__lumi-img:hover { transform: scale(1.05); }

@media (min-width: 768px) {
    .intro__lumi-img { display: block; }
}

.intro__text h2 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--on-surface);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.intro__text p {
    font-size: 1.125rem;
    line-height: 1.75;
    font-weight: 500;
}

.intro__hints {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.intro__hint-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-md);
}

.intro__hint-item .material-symbols-outlined {
    color: var(--primary);
}

.intro__hint-item span:last-child {
    font-weight: 700;
    color: var(--on-surface-variant);
}

/* Sidebar */
.intro__sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Key progress card */
.keys-card {
    background: var(--surface-container-highest);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.keys-card__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--on-surface-variant);
    text-align: center;
    margin-bottom: 1.5rem;
}

.keys-card__staff {
    position: relative;
    padding: 2rem 0;
    height: 8rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

.keys-card__staff-lines {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2rem 1rem;
    opacity: 0.3;
}

.keys-card__staff-lines span {
    height: 1px;
    background: var(--on-surface);
}

.keys-card__notes {
    display: flex;
    justify-content: space-around;
    width: 100%;
    z-index: 10;
}

.keys-card__notes .material-symbols-outlined {
    font-size: 2rem;
    color: var(--outline-variant);
    transition: color 0.3s, transform 0.3s;
}

.keys-card__notes .material-symbols-outlined.earned {
    color: var(--primary);
    font-variation-settings: 'FILL' 1;
    transform: scale(1.2);
}

.keys-card__footer {
    font-size: 0.875rem;
    font-style: italic;
    text-align: center;
    margin-top: 1rem;
    color: var(--on-surface-variant);
}

/* CTA section */
.cta-panel {
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.cta-panel__subtitle {
    color: var(--primary);
    font-weight: 700;
}

.cta-panel__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 800;
    font-size: 1.75rem;
}

/* --- Buttons --- */
.btn-primary {
    position: relative;
    width: 100%;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-fixed-dim));
    border-radius: var(--radius-xl);
    color: white;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: 1.5rem;
    border: none;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 97, 166, 0.3);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity 0.3s;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 32px rgba(0, 97, 166, 0.4);
}

.btn-primary:hover::after { opacity: 1; }
.btn-primary:active { transform: scale(0.95); }

.btn-primary .material-symbols-outlined {
    font-size: 2rem;
    animation: pulse-icon 2s infinite;
}

@keyframes pulse-icon {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.btn-secondary {
    padding: 1rem 1.5rem;
    background: var(--surface-container-highest);
    color: var(--on-surface);
    border: none;
    border-radius: var(--radius-xl);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-secondary:hover { transform: scale(1.05); }
.btn-secondary:active { transform: scale(0.95); }

.cta-dots {
    display: flex;
    gap: 0.5rem;
}

.cta-dots span {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: var(--radius-full);
}

/* --- RETO CARDS --- */
.reto-header {
    text-align: center;
    margin-bottom: 2rem;
}

.reto-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.reto-badge--blue {
    background: var(--primary-container);
    color: var(--on-primary-container);
}

.reto-badge--green {
    background: var(--secondary-container);
    color: var(--on-secondary-container);
}

.reto-badge--yellow {
    background: var(--tertiary-container);
    color: var(--on-tertiary-container);
}

.reto-badge--red {
    background: #fee2e2;
    color: #991b1b;
}

.reto-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 800;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    color: var(--on-surface);
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.reto-subtitle {
    font-size: 1.125rem;
    color: var(--on-surface-variant);
}

.reto-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: start;
}

@media (min-width: 1024px) {
    .reto-grid {
        grid-template-columns: 5fr 7fr;
    }
    .reto-grid--reverse {
        grid-template-columns: 7fr 5fr;
    }
}

/* --- RETO 1: PENTAGRAMA --- */
.pentagram-container {
    background: var(--surface-container-low);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 350px;
}

.pentagram {
    width: 100%;
    max-width: 32rem;
    position: relative;
    padding: 3rem 0 6rem;
}

.pentagram__line {
    height: 2px;
    background: var(--on-surface);
    width: 100%;
    border-radius: var(--radius-full);
    margin-bottom: 1.5rem;
}

.pentagram__line:last-of-type {
    margin-bottom: 0;
}

.pentagram__note {
    position: absolute;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    z-index: 10;
}

.pentagram__note-head {
    width: 3rem;
    height: 2.5rem;
    border-radius: 100%;
    transform: rotate(-15deg);
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.pentagram__note-head--default {
    background: var(--on-surface);
}

.pentagram__note-head--do {
    background: var(--primary);
    border: 2px solid white;
    box-shadow: 0 4px 12px rgba(0, 97, 166, 0.3);
}

.pentagram__note:hover .pentagram__note-head {
    transform: rotate(-15deg) scale(1.15);
}

.pentagram__note:active .pentagram__note-head {
    transform: rotate(-15deg) scale(0.95);
}

.pentagram__note-label {
    position: absolute;
    bottom: -1.75rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--on-surface-variant);
    opacity: 0;
    transition: opacity 0.2s;
}

.pentagram__note:hover .pentagram__note-label {
    opacity: 1;
}

.pentagram__note--do .pentagram__note-label {
    color: var(--primary);
    opacity: 1;
}

.pentagram__ledger-line {
    position: absolute;
    width: 4rem;
    height: 2px;
    background: var(--on-surface);
    left: 50%;
    transform: translateX(-50%);
    top: 50%;
}

/* Lumi hint card */
.lumi-hint {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(198, 198, 198, 0.1);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-ambient);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-top: 1rem;
}

.lumi-hint__avatar {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-full);
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--primary-fixed);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.lumi-hint__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lumi-hint__badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--primary);
    color: var(--primary-container);
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    margin-bottom: 0.5rem;
}

.lumi-hint__text {
    font-size: 0.875rem;
    color: var(--on-surface);
    line-height: 1.6;
}

/* --- Feedback / Success Card --- */
.feedback-card {
    margin-top: 2rem;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transform: scale(0);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: var(--shadow-lg);
}

.feedback-card.show {
    transform: scale(1);
}

.feedback-card--success {
    background: var(--primary-container);
    color: var(--on-primary-container);
    border: 2px solid var(--primary-fixed-dim);
}

.feedback-card--error {
    background: var(--error-container);
    color: var(--on-error-container);
    border: 2px solid #fca5a5;
}

.feedback-card__icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.feedback-card__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.feedback-card__text {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.feedback-card__code {
    display: inline-block;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-full);
    padding: 0.5rem 1.5rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: 0.15em;
    color: var(--primary);
}

.feedback-card__next {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: var(--radius-xl);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.feedback-card__next:hover { transform: scale(1.05); }
.feedback-card__next:active { transform: scale(0.95); }

/* --- RETO 2: RITMO --- */
.rhythm-character {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.rhythm-character__glow {
    position: absolute;
    inset: -1rem;
    background: var(--primary-container);
    border-radius: var(--radius-full);
    filter: blur(40px);
    opacity: 0.3;
    animation: pulse-glow 3s infinite;
}

.rhythm-character__img {
    width: 16rem;
    height: 16rem;
    object-fit: contain;
    position: relative;
    z-index: 10;
    border-radius: var(--radius-lg);
}

.rhythm-prompt {
    margin-top: 1.5rem;
}

.rhythm-prompt__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--primary);
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.audio-play-btn {
    position: relative;
    width: 6rem;
    height: 6rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-fixed-dim));
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    transition: transform 0.2s;
    margin: 0 auto 1rem;
}

.audio-play-btn:hover { transform: scale(1.1); }
.audio-play-btn:active { transform: scale(0.95); }

.audio-play-btn .material-symbols-outlined {
    color: white;
    font-size: 3rem;
}

.audio-play-btn__ring {
    position: absolute;
    inset: -0.5rem;
    border: 2px solid rgba(0, 97, 166, 0.3);
    border-radius: var(--radius-full);
    animation: ping-ring 2s infinite;
    pointer-events: none;
}

@keyframes ping-ring {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.4); opacity: 0; }
}

.rhythm-label {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--primary);
}

/* Rhythm options */
.rhythm-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.rhythm-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    background: var(--surface-container-low);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s;
    text-align: left;
    font-family: inherit;
}

.rhythm-option:hover {
    border-color: var(--primary-container);
    background: white;
}

.rhythm-option__content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.rhythm-option__letter {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-full);
    background: var(--surface-container-highest);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    color: var(--on-surface-variant);
    transition: all 0.3s;
}

.rhythm-option:hover .rhythm-option__letter {
    background: var(--primary);
    color: white;
}

.rhythm-option__notes {
    font-size: 2.5rem;
    font-family: serif;
    color: rgba(25, 28, 32, 0.8);
    transition: color 0.3s;
}

.rhythm-option:hover .rhythm-option__notes {
    color: var(--primary);
}

.rhythm-option__radio {
    color: var(--outline-variant);
    transition: color 0.3s;
}

.rhythm-option:hover .rhythm-option__radio {
    color: var(--primary);
}

/* Selected state */
.rhythm-option.selected {
    background: white;
    border-color: var(--secondary);
    box-shadow: 0 4px 16px rgba(172, 42, 93, 0.15);
}

.rhythm-option.selected .rhythm-option__letter {
    background: var(--secondary);
    color: white;
}

.rhythm-option.selected .rhythm-option__notes {
    color: var(--secondary);
}

.rhythm-option.wrong {
    background: var(--error-container);
    border-color: var(--error);
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Rhythm feedback */
.rhythm-feedback {
    margin-top: 1.5rem;
    padding: 2rem;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--secondary-container), var(--tertiary-container));
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-xl);
    transform: scale(0);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.rhythm-feedback.show { transform: scale(1); }

.rhythm-feedback__overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(2px);
}

.rhythm-feedback__content {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.rhythm-feedback__left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.rhythm-feedback__icon-circle {
    width: 4rem;
    height: 4rem;
    background: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.rhythm-feedback__icon-circle .material-symbols-outlined {
    color: var(--secondary);
    font-size: 2rem;
}

.rhythm-feedback__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: 1.5rem;
    color: var(--on-secondary-fixed);
}

.rhythm-feedback__subtitle {
    font-weight: 700;
    color: var(--on-secondary-fixed-variant);
}

.rhythm-feedback__code-box {
    text-align: right;
}

.rhythm-feedback__code {
    display: inline-block;
    background: rgba(255, 255, 255, 0.9);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    margin-bottom: 0.25rem;
}

.rhythm-feedback__code span {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: 1.75rem;
    letter-spacing: 0.15em;
    color: var(--secondary);
}

.rhythm-feedback__code-hint {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--secondary);
}

/* --- RETO 3: TONO --- */
.tone-character {
    position: relative;
    width: 100%;
    max-width: 24rem;
    margin: 0 auto;
}

.tone-character__tooltip {
    position: absolute;
    top: -1rem;
    right: -0.5rem;
    z-index: 20;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: var(--shadow-xl);
    max-width: 15rem;
}

.tone-character__tooltip p {
    font-weight: 600;
    font-size: 1.125rem;
    line-height: 1.5;
}

.tone-character__tooltip-arrow {
    position: absolute;
    bottom: -0.75rem;
    left: 2rem;
    width: 1.5rem;
    height: 1.5rem;
    background: rgba(255, 255, 255, 0.8);
    transform: rotate(45deg);
    border-right: 1px solid rgba(255, 255, 255, 0.4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.tone-character__img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 12px 32px rgba(0,0,0,0.15));
    transition: transform 0.5s;
    border-radius: var(--radius-lg);
}

.tone-character__img:hover { transform: scale(1.05); }

.tone-character__ring-1 {
    position: absolute;
    inset: 0;
    border-radius: var(--radius-full);
    border: 16px solid rgba(0, 97, 166, 0.05);
    transform: scale(1.1);
    z-index: -1;
}

.tone-character__ring-2 {
    position: absolute;
    inset: 0;
    border-radius: var(--radius-full);
    border: 8px solid rgba(172, 42, 93, 0.05);
    transform: scale(1.25);
    z-index: -1;
}

/* Tone controls */
.tone-controls {
    background: var(--surface-container-low);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.tone-controls__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 800;
    font-size: 2rem;
    color: var(--on-surface);
    margin-bottom: 0.5rem;
}

.tone-controls__subtitle {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2rem;
}

.tone-players {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tone-player-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    border-bottom: 4px solid rgba(0, 97, 166, 0.2);
}

.tone-player-btn:hover {
    background: var(--primary-container);
    border-bottom-color: var(--primary);
}

.tone-player-btn:active { transform: scale(0.95); }

.tone-player-btn__circle {
    width: 4rem;
    height: 4rem;
    background: var(--primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s;
}

.tone-player-btn:hover .tone-player-btn__circle {
    transform: scale(1.1);
}

.tone-player-btn__circle .material-symbols-outlined {
    font-size: 2rem;
}

.tone-player-btn__label {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--on-surface-variant);
}

.tone-player-btn.playing {
    background: var(--primary-container);
    border-bottom-color: var(--primary);
}

.tone-player-btn.playing .tone-player-btn__circle {
    animation: pulse-glow 0.5s infinite;
}

/* Tone choice buttons */
.tone-choices {
    display: flex;
    gap: 1rem;
}

.tone-choice-btn {
    flex: 1;
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: none;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: 3rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.tone-choice-btn:hover { transform: scale(1.05); }
.tone-choice-btn:active { transform: scale(0.95); }

.tone-choice-btn--1 {
    background: linear-gradient(135deg, var(--primary), var(--primary-fixed-dim));
    color: white;
    box-shadow: 0 4px 16px rgba(0, 97, 166, 0.3);
}

.tone-choice-btn--2 {
    background: var(--surface-container-highest);
    color: var(--on-surface);
}

.tone-choice-btn.selected {
    outline: 4px solid var(--secondary);
    outline-offset: 2px;
}

.tone-choice-btn.wrong {
    background: var(--error-container);
    animation: shake 0.5s;
}

/* Tone feedback */
.tone-feedback {
    margin-top: 1.5rem;
    background: rgba(255, 225, 109, 0.3);
    border: 2px dashed rgba(112, 93, 0, 0.2);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transform: scale(0);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tone-feedback.show { transform: scale(1); }

.tone-feedback__icon {
    background: var(--tertiary);
    padding: 1rem;
    border-radius: var(--radius-full);
    color: white;
}

.tone-feedback__icon .material-symbols-outlined { font-size: 2rem; }

.tone-feedback__code {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--tertiary);
}

.tone-feedback__text {
    color: var(--on-surface-variant);
}

/* --- RETO 4: ABESBATZA --- */
.choir-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

@media (min-width: 768px) {
    .choir-visual {
        grid-template-columns: repeat(4, 1fr);
    }
}

.choir-card {
    background: var(--surface-container-low);
    padding: 1rem;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.5rem;
    transition: transform 0.2s;
    border-bottom: 4px solid;
}

.choir-card:hover { transform: translateY(-4px); }

.choir-card--soprano { border-bottom-color: var(--primary); }
.choir-card--alto { border-bottom-color: var(--secondary); }
.choir-card--tenor { border-bottom-color: var(--tertiary); }
.choir-card--bass { border-bottom-color: var(--outline); }

.choir-card__icon {
    width: 4rem;
    height: 4rem;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.choir-card--soprano .choir-card__icon { background: var(--primary-container); color: var(--on-primary-container); }
.choir-card--alto .choir-card__icon { background: var(--secondary-container); color: var(--on-secondary-container); }
.choir-card--tenor .choir-card__icon { background: var(--tertiary-container); color: var(--on-tertiary-container); }
.choir-card--bass .choir-card__icon { background: var(--surface-variant); color: var(--on-surface-variant); }

.choir-card__icon .material-symbols-outlined { font-size: 2rem; }

.choir-card__name {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.choir-card--soprano .choir-card__name { color: var(--primary); }
.choir-card--alto .choir-card__name { color: var(--secondary); }
.choir-card--tenor .choir-card__name { color: var(--tertiary); }
.choir-card--bass .choir-card__name { color: var(--on-surface-variant); }

.choir-card__arrows {
    display: flex;
    gap: 0.125rem;
}

/* Choir options */
.choir-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.choir-option {
    background: var(--surface-container-lowest);
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(198, 198, 198, 0.15);
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    font-family: inherit;
}

.choir-option:hover {
    background: var(--primary-container);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.choir-option__name {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--on-surface);
    transition: color 0.3s;
}

.choir-option:hover .choir-option__name {
    color: var(--primary);
}

.choir-option__radio {
    color: var(--outline-variant);
    transition: color 0.3s;
}

.choir-option:hover .choir-option__radio {
    color: var(--primary);
}

.choir-option.selected {
    background: var(--primary);
    box-shadow: 0 4px 16px rgba(0, 97, 166, 0.3);
}

.choir-option.selected .choir-option__name { color: var(--on-primary); }
.choir-option.selected .choir-option__radio { color: var(--on-primary); }

.choir-option.wrong {
    background: var(--error-container);
    animation: shake 0.5s;
}

/* Choir feedback */
.choir-feedback {
    margin-top: 2rem;
    background: rgba(220, 252, 231, 0.5);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 2px dashed rgba(22, 163, 74, 0.3);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transform: scale(0);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.choir-feedback.show { transform: scale(1); }

.choir-feedback__icon {
    width: 4rem;
    height: 4rem;
    background: var(--success);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    animation: pulse-glow 2s infinite;
}

.choir-feedback__icon .material-symbols-outlined {
    color: white;
    font-size: 2rem;
}

.choir-feedback__code {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: 0.15em;
    color: var(--success);
}

.choir-feedback__text {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--success);
}

/* --- PANTALLA 6: FINAL --- */
.final-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    width: 100%;
    align-items: center;
}

@media (min-width: 768px) {
    .final-grid {
        grid-template-columns: 5fr 7fr;
    }
}

.final-character {
    position: relative;
}

.final-character__glow {
    position: absolute;
    top: -3rem;
    left: -1.5rem;
    width: 8rem;
    height: 8rem;
    background: var(--tertiary-fixed);
    border-radius: var(--radius-full);
    filter: blur(60px);
    opacity: 0.4;
    animation: pulse-glow 3s infinite;
}

.final-character__card {
    position: relative;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
    overflow: visible;
}

.final-character__img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 12px 32px rgba(0,0,0,0.15));
    transition: transform 0.5s;
    border-radius: var(--radius-lg);
}

.final-character__img:hover { transform: scale(1.1); }

.final-character__badge {
    position: absolute;
    bottom: -1rem;
    right: -1rem;
    background: var(--secondary);
    color: var(--on-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: opacity 0.5s 0.5s;
}

.final-character__badge.show { opacity: 1; }

/* Final interaction */
.final-interaction {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.final-interaction__header h1 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--primary);
    letter-spacing: -0.05em;
    margin-bottom: 1rem;
}

.final-interaction__header p {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--on-surface-variant);
}

/* Code inputs */
.code-inputs {
    background: var(--surface-container);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.code-input {
    width: 5rem;
    height: 5rem;
    text-align: center;
    font-size: 2.5rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    background: var(--surface-container-lowest);
    border: 4px solid var(--primary);
    border-radius: var(--radius-xl);
    color: var(--primary);
    outline: none;
    transition: all 0.3s;
}

.code-input:focus {
    box-shadow: 0 0 0 4px var(--primary-container);
    transform: scale(1.05);
}

.code-input.correct {
    border-color: var(--success);
    color: var(--success);
    background: var(--success-container);
}

.code-input.wrong {
    border-color: var(--error);
    color: var(--error);
    animation: shake 0.5s;
}

.code-submit-btn {
    width: 100%;
    padding: 1rem;
    margin-top: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-fixed-dim));
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 800;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.code-submit-btn:hover { transform: scale(1.03); }
.code-submit-btn:active { transform: scale(0.97); }

/* Final message */
.final-message {
    background: rgba(210, 228, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border-left: 8px solid var(--primary);
}

.final-message p {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--on-primary-container);
    line-height: 1.75;
}

.final-message .material-symbols-outlined {
    margin-right: 0.5rem;
}

/* Victory overlay */
.victory-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.victory-overlay.show {
    display: flex;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.victory-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 3rem;
    max-width: 32rem;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: scaleIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scaleIn {
    from { transform: scale(0.5); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.victory-card__emoji {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.victory-card__title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.victory-card__subtitle {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--on-surface);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.victory-card__features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.victory-card__feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.victory-card__feature .material-symbols-outlined {
    font-size: 2.5rem;
    color: var(--primary);
}

.victory-card__feature span:last-child {
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--on-surface-variant);
}

.victory-card__cta {
    width: 100%;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-fixed-dim));
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 900;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 97, 166, 0.3);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.victory-card__cta:hover { transform: scale(1.05); }
.victory-card__cta:active { transform: scale(0.95); }

/* --- Bottom Navigation Bar --- */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 50;
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    padding: 0 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0px -12px 32px rgba(25, 28, 32, 0.06);
    border-radius: 3rem 3rem 0 0;
}

.bottom-nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    color: #94a3b8;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    background: none;
    border: none;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

.bottom-nav__item:hover { color: var(--primary); }

.bottom-nav__item .material-symbols-outlined { font-size: 1.5rem; }

.bottom-nav__item span:last-child {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 0.25rem;
}

.bottom-nav__item.active {
    background: var(--primary);
    color: white;
    border-radius: var(--radius-full);
    padding: 1rem;
    margin-top: -2rem;
    box-shadow: 0 4px 16px rgba(0, 97, 166, 0.3);
    transform: scale(1.1);
}

.bottom-nav__item.locked {
    opacity: 0.4;
    pointer-events: none;
}

/* --- Decorative Background Elements --- */
.bg-decor {
    position: fixed;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
    inset: 0;
}

.bg-decor__blob-1 {
    position: absolute;
    top: 25%;
    right: -5rem;
    width: 24rem;
    height: 24rem;
    background: rgba(0, 97, 166, 0.05);
    border-radius: var(--radius-full);
    filter: blur(100px);
}

.bg-decor__blob-2 {
    position: absolute;
    bottom: 25%;
    left: -5rem;
    width: 24rem;
    height: 24rem;
    background: rgba(172, 42, 93, 0.05);
    border-radius: var(--radius-full);
    filter: blur(100px);
}

.bg-decor__note-1 {
    position: absolute;
    top: 2.5rem;
    left: 2.5rem;
    color: rgba(0, 97, 166, 0.1);
    transform: rotate(12deg);
}

.bg-decor__note-1 .material-symbols-outlined { font-size: 6rem; }

.bg-decor__note-2 {
    position: absolute;
    bottom: 10rem;
    right: 5rem;
    color: rgba(172, 42, 93, 0.1);
    transform: rotate(-12deg);
}

.bg-decor__note-2 .material-symbols-outlined { font-size: 6rem; }

/* Floating notes animation */
.floating-note {
    position: absolute;
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33% { transform: translateY(-10px) rotate(5deg); }
    66% { transform: translateY(5px) rotate(-3deg); }
}

/* --- Confetti animation --- */
.confetti-piece {
    position: fixed;
    z-index: 200;
    pointer-events: none;
    animation: confetti-fall linear forwards;
}

@keyframes confetti-fall {
    0% {
        transform: translateY(-100vh) rotateZ(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotateZ(720deg);
        opacity: 0;
    }
}

/* --- Responsive adjustments --- */
@media (max-width: 768px) {
    .main-content {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .code-input {
        width: 4rem;
        height: 4rem;
        font-size: 1.75rem;
    }

    .choir-options {
        grid-template-columns: 1fr;
    }

    .tone-choices {
        flex-direction: column;
    }

    .rhythm-option__notes {
        font-size: 1.75rem;
    }

    .final-character__badge {
        bottom: -0.5rem;
        right: 0;
        font-size: 0.75rem;
        padding: 0.5rem 1rem;
    }
}