/* =========================================
   1. RESET & BASICS (MODO CLARO LIMPIO)
   ========================================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #f8fafc; /* Fondo blanco/gris muy claro */
    color: #1e293b; /* Texto oscuro */
    overflow-x: hidden;
}

/* =========================================
   2. PORTADA (LANDING PAGE)
   ========================================= */
.landing-page {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
}

.landing-content { max-width: 600px; animation: fadeInUp 0.8s ease-out; }

.landing-badge {
    background: #3b82f6; color: white; padding: 5px 10px;
    border-radius: 20px; font-size: 0.8rem; font-weight: 800;
    margin-bottom: 20px; display: inline-block;
}

.hero-title { font-size: 3rem; font-weight: 900; line-height: 1.1; margin-bottom: 20px; }
.hero-subtitle { font-size: 1.1rem; color: #94a3b8; margin-bottom: 40px; }

.features-grid {
    display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 15px; margin-bottom: 40px;
}
.feature-box {
    background: rgba(255,255,255,0.05); padding: 15px; border-radius: 10px;
}
.feature-box i { font-size: 1.5rem; margin-bottom: 10px; color: #3b82f6; }
.feature-box h3 { font-size: 0.9rem; margin-bottom: 5px; }
.feature-box p { font-size: 0.7rem; color: #94a3b8; }

.enter-btn {
    background: #3b82f6; color: white; border: none; padding: 15px 40px;
    border-radius: 50px; font-size: 1.2rem; font-weight: 800; cursor: pointer;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4); transition: transform 0.2s;
}
.enter-btn:active { transform: scale(0.95); }

/* =========================================
   3. APP INTERFACE (DISEÑO BLANCO)
   ========================================= */
.hidden { display: none !important; }

/* Contenedor principal para centrar todo */
#app-interface {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* --- HUD SUPERIOR (ARREGLADO) --- */
.player-hud {
    background: white;
    width: 100%; /* Ocupa todo el ancho */
    padding: 15px 20px;
    display: flex;
    justify-content: center; /* Centra el contenido */
    align-items: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 500;
    position: relative; /* Necesario para el botón absoluto */
}

/* Grupo de estadísticas (Centrado visualmente) */
.hud-group {
    display: flex;
    align-items: center;
    gap: 30px;
}
.hud-item { text-align: center; }
.hud-label { font-size: 0.6rem; color: #64748b; font-weight: 700; letter-spacing: 1px; }
.hud-value { font-size: 1rem; font-weight: 800; color: #0f172a; }
.fire-text { color: #f59e0b; }

.hud-progress { width: 100px; height: 8px; background: #e2e8f0; border-radius: 10px; overflow: hidden; margin: 0 10px; }
.xp-fill { height: 100%; background: #3b82f6; width: 0%; transition: width 0.5s; }

/* --- BOTÓN LOGIN (LA "TONTERÍA") --- */
.auth-btn {
    position: absolute; /* Lo anclamos a la derecha */
    right: 20px; 
    background: #0f172a; /* Oscuro para destacar sobre blanco */
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); /* Rebote */
    display: flex; align-items: center; gap: 8px;
}

/* Animación al pasar el ratón */
.auth-btn:hover {
    transform: scale(1.1) rotate(-3deg); /* Crece y se tuerce */
    background: #3b82f6; /* Se vuelve azul */
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.auth-btn.logged-in {
    background: #dcfce7; color: #166534; box-shadow: none;
}
.auth-btn.logged-in:hover { transform: none; background: #bbf7d0; }


/* --- CONTENEDOR DE CONTENIDO (CENTRADO) --- */
.container { 
    max-width: 600px; 
    width: 100%; 
    padding: 20px; 
    margin: 0 auto; /* ESTO ES LA CLAVE DEL CENTRADO */
    padding-bottom: 100px; 
}

/* HEADER & SEARCH */
.hero-section { text-align: center; margin-bottom: 30px; margin-top: 20px; }
.brand-badge { background: #e0f2fe; color: #0284c7; padding: 5px 12px; border-radius: 20px; font-size: 0.7rem; font-weight: 700; display: inline-block; margin-bottom: 10px; }
.gradient-title { font-size: 2rem; font-weight: 900; background: linear-gradient(135deg, #0f172a 0%, #334155 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 20px; }

.search-wrapper { position: relative; margin-bottom: 20px; }
.search-bar { display: flex; background: white; border-radius: 50px; padding: 5px; box-shadow: 0 4px 20px rgba(0,0,0,0.05); border: 1px solid #e2e8f0; }
.search-icon { padding: 15px; color: #94a3b8; }
#magic-search { border: none; outline: none; flex: 1; font-size: 1rem; }
.search-btn { background: #0f172a; color: white; border: none; width: 45px; height: 45px; border-radius: 50%; cursor: pointer; }

.results-dropdown { position: absolute; top: 60px; left: 0; width: 100%; background: white; border-radius: 12px; box-shadow: 0 10px 40px rgba(0,0,0,0.1); overflow: hidden; z-index: 50; }
.result-item { padding: 15px; border-bottom: 1px solid #f1f5f9; cursor: pointer; display: flex; justify-content: space-between; }
.result-item:hover { background: #f8fafc; }

/* CARDS (TARJETAS BLANCAS LIMPIAS) */
.card { background: white; border-radius: 16px; padding: 20px; margin-bottom: 20px; box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05); border: 1px solid #f1f5f9; }
.card-header { font-size: 0.9rem; font-weight: 700; color: #64748b; text-transform: uppercase; margin-bottom: 15px; display: flex; align-items: center; gap: 8px; }

/* PREMIUM BANNER (BOTÓN ROSA) */
.premium-card { background: #1e1b4b; color: white; display: flex; justify-content: space-between; align-items: center; }
.premium-text h2 { font-size: 1.2rem; margin-bottom: 5px; color: #818cf8; }
.premium-text p { font-size: 0.8rem; color: #c7d2fe; }
.premium-card .cta-button { 
    background: #ec4899; /* ROSA */
    color: white; 
    text-decoration: none; 
    padding: 10px 20px; 
    border-radius: 8px; 
    font-weight: 700; 
    font-size: 0.9rem; 
    box-shadow: 0 4px 15px rgba(236, 72, 153, 0.4);
    transition: transform 0.2s;
}
.premium-card .cta-button:hover { transform: scale(1.05); }

/* VIDEO */
.video-responsive { position: relative; padding-bottom: 56.25%; height: 0; border-radius: 12px; overflow: hidden; background: #000; }
.video-responsive iframe, .video-responsive video { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }

/* VOCABULARY & QUIZ */
.vocab-grid { list-style: none; display: grid; gap: 10px; }
.vocab-grid li { background: #f8fafc; padding: 15px; border-radius: 8px; display: flex; align-items: center; gap: 10px; border: 1px solid #e2e8f0; }
.audio-btn { background: none; border: none; color: #3b82f6; cursor: pointer; font-size: 1.1rem; }

.highlight-card { border: 2px solid #3b82f6; background: #eff6ff; }
.mic-btn { width: 60px; height: 60px; border-radius: 50%; background: #3b82f6; color: white; border: none; font-size: 1.5rem; cursor: pointer; margin: 0 auto 20px; display: block; box-shadow: 0 4px 15px rgba(59,130,246,0.3); }
.mic-listening { background: #ef4444; animation: pulse 1s infinite; }
.quiz-q { font-size: 1.2rem; font-weight: 700; text-align: center; margin-bottom: 20px; }
.buttons-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.option-btn { padding: 15px; border: 1px solid #e2e8f0; background: white; border-radius: 8px; font-weight: 600; cursor: pointer; color: #1e293b; }
.option-btn:hover { background: #f1f5f9; }

.feedback-box { margin-top: 15px; padding: 15px; border-radius: 8px; font-weight: 600; text-align: center; }
.feedback-success { background: #dcfce7; color: #166534; }
.feedback-error { background: #fee2e2; color: #991b1b; }

/* MODALS & CHAT (ARREGLADO MAXIMIZAR) */
.coach-btn { position: fixed; bottom: 20px; right: 20px; background: #0f172a; color: white; padding: 12px 20px; border-radius: 30px; font-weight: 700; box-shadow: 0 10px 30px rgba(0,0,0,0.2); cursor: pointer; z-index: 90; display: flex; align-items: center; gap: 10px; }
.coach-window { position: fixed; bottom: 90px; right: 20px; width: 350px; height: 500px; background: white; border-radius: 16px; box-shadow: 0 20px 50px rgba(0,0,0,0.2); z-index: 100; display: flex; flex-direction: column; overflow: hidden; border: 1px solid #e2e8f0; }

/* CLASE VITAL PARA MAXIMIZAR */
.coach-window.fullscreen { width: 100% !important; height: 100% !important; top: 0; left: 0; bottom: 0; right: 0; border-radius: 0; }

.coach-header { background: #0f172a; color: white; padding: 15px; font-weight: 700; display: flex; justify-content: space-between; align-items: center; }
.window-controls button { background: none; border: none; color: white; cursor: pointer; margin-left: 10px; font-size: 1rem; }
.chat-body { flex: 1; padding: 15px; overflow-y: auto; background: #f8fafc; }
.message { margin-bottom: 10px; padding: 10px 15px; border-radius: 12px; font-size: 0.9rem; max-width: 80%; }
.bot-msg { background: white; border: 1px solid #e2e8f0; align-self: flex-start; }
.user-msg { background: #3b82f6; color: white; align-self: flex-end; margin-left: auto; }
.chat-input-area { padding: 15px; background: white; border-top: 1px solid #e2e8f0; }
.key-input { width: 100%; padding: 10px; border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 10px; font-size: 0.8rem; }
.input-row { display: flex; gap: 10px; }
.input-row input { flex: 1; padding: 10px; border: 1px solid #e2e8f0; border-radius: 6px; }
#send-msg { background: #0f172a; color: white; border: none; padding: 0 15px; border-radius: 6px; cursor: pointer; }

/* AUTH MODAL */
.auth-window { top: 50%; left: 50%; transform: translate(-50%, -50%); bottom: auto; right: auto; height: auto; width: 90%; max-width: 400px; }
.auth-body { padding: 30px; text-align: center; }
.auth-input { width: 100%; padding: 12px; border: 1px solid #e2e8f0; border-radius: 8px; margin-bottom: 15px; }
.auth-subtitle { color: #64748b; margin-bottom: 20px; }
.full-width { width: 100%; background: #3b82f6; color: white; padding: 12px; border: none; border-radius: 8px; font-weight: 700; cursor: pointer; }
.error-msg { color: #ef4444; font-size: 0.8rem; margin-top: 10px; }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.1); } 100% { transform: scale(1); } }

/* RESPONSIVE */
@media (max-width: 600px) {
    .features-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 2.2rem; }
    .coach-window { width: 90%; right: 5%; left: 5%; bottom: 80px; }
    .premium-card { flex-direction: column; text-align: center; gap: 15px; }
}
.legal-disclaimer { margin-top: 20px; font-size: 0.8rem; color: #64748b; }
.mic-hint { font-size: 0.8rem; color: #64748b; margin-top: 5px; text-align: center; }
.premium-hint { font-size: 0.7rem; color: #999; margin-top: 5px; text-align: center; }