:root {
    --bg-dark: #121214;
    --card-bg: #1e1e24;
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --danger: #ef4444;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 800px;
    padding: 2rem;
    height: 100%;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.05em;
    background: linear-gradient(135deg, #c4b5fd 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.room-code-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

#roomCodeInput {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: 0.2em;
    color: #fff;
    background: transparent;
    border: none;
    text-align: center;
    text-shadow: 0 0 20px rgba(139, 92, 246, 0.4);
    width: 400px;
    text-transform: uppercase;
    outline: none;
    border-bottom: 2px dashed rgba(139, 92, 246, 0.3);
    transition: width 0.3s ease;
}

#editPinBtn {
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid var(--accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.2s;
}

#editPinBtn:hover {
    background: rgba(139, 92, 246, 0.4);
}

.sound-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
}

.sound-card {
    background-color: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    outline: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

@media (hover: hover) {
    .sound-card:hover {
        transform: translateY(-5px);
        background-color: #25252d;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        border-color: rgba(139, 92, 246, 0.3);
    }
    .sound-card:hover span {
        color: var(--text-primary);
    }
}

.sound-card:active {
    transform: translateY(2px) scale(0.95);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.6);
}

.sound-card.playing {
    border-color: var(--accent);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.4);
    animation: pulse 1s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.05); }
}

.sound-card .icon {
    font-size: 2.5rem;
}

.sound-card span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

audio {
    display: none;
}

/* --- ESTILOS REMOTE (MOBILE) --- */

.remote-body {
    background-color: #0b0b0d; /* Slightly darker for remote screen */
    display: block !important;
    height: auto !important;
}

.remote-container {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.active-screen {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

.hidden-screen {
    display: none;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 24px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.login-card h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

#roomInput {
    width: 100%;
    padding: 1.2rem;
    font-size: 2rem;
    text-align: center;
    background-color: rgba(0,0,0,0.3);
    border: 2px solid rgba(255,255,255,0.1);
    color: white;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    font-family: inherit;
    text-transform: uppercase;
    outline: none;
    transition: border-color 0.3s;
}

#roomInput:focus {
    border-color: var(--accent);
}

.join-btn {
    width: 100%;
    padding: 1.2rem;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 1.2rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.3);
    transition: background-color 0.2s, transform 0.1s;
}

.join-btn:active {
    transform: scale(0.98);
}

.join-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.error-msg {
    color: var(--danger);
    margin-top: 1rem;
    font-size: 0.9rem;
    min-height: 1.2rem;
}

.remote-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    background: var(--card-bg);
    padding: 1rem 1.5rem;
    border-radius: 20px;
}

.remote-header h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.highlight {
    color: var(--accent);
    font-weight: 800;
    letter-spacing: 2px;
}

.disconnect-btn {
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    cursor: pointer;
    font-weight: 600;
}

.remote-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

/* Responsiveness on host screen down to mobile sizes */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    body {
        align-items: flex-start;
        padding-top: 1rem;
    }

    h1 {
        font-size: 1.8rem;
    }

    #roomCodeInput {
        font-size: 2rem !important;
        width: 100% !important;
        max-width: 250px;
    }

    .controls-panel {
        flex-direction: column;
        align-items: stretch !important;
        text-align: center;
    }

    .controls-group {
        justify-content: center;
        flex-wrap: wrap;
    }

    input[type=range] {
        width: 100% !important;
    }

    #unlockOverlay h2 {
        font-size: 1.8rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .sound-grid:not(.remote-grid) {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }
    .sound-card {
        padding: 1.2rem 0.5rem;
    }
    .sound-card .icon {
        font-size: 1.8rem;
    }
}